阅读说明：本技术 钻孔测量装置及测量方法 (drilling measuring device and measuring method ) 是由 张庆华 徐雪战 邹云龙 赵旭生 康建宁 刘文杰 蒲阳 程晓阳 邓敢博 李明建 岳 于 2019-10-17 设计创作，主要内容包括：本发明涉及一种钻孔测量装置,包括钻孔孔深测定装置和钻孔轨迹测定装置；所述钻孔孔深测定装置和钻孔轨迹测定装置通过测量线相连接并分别用于对钻孔孔深及钻孔轨迹进行测量；所述钻孔孔深测定装置包括收放单元和孔深计量单元；所述钻孔轨迹测定装置包括壳体II和设置于所述壳体II尾部并用于测量线固定的固定件；所述测量线从孔深计量单元内部穿过并两端分别绕接在所述收放单元及固定件上；利于避免误判及避免遗留安全隐患,利于实现煤矿井下瓦斯预抽钻孔信息的精准预测,利于提高矿井的瓦斯灾害防治能力,利于提高抽采效率及利于大面积推广使用。(the invention relates to a drilling measuring device, which comprises a drilling hole depth measuring device and a drilling track measuring device; the drilling hole depth measuring device and the drilling track measuring device are connected through a measuring line and are respectively used for measuring the drilling hole depth and the drilling track; the drilling hole depth measuring device comprises a retracting unit and a hole depth measuring unit; the drilling track determination device comprises a shell II and a fixing piece which is arranged at the tail of the shell II and used for fixing a measuring line; the measuring line penetrates through the hole depth measuring unit, and two ends of the measuring line are respectively wound on the retracting unit and the fixing piece; the method is beneficial to avoiding misjudgment and potential safety hazard leaving, is beneficial to realizing accurate prediction of underground gas pre-drainage drilling information of the coal mine, is beneficial to improving the gas disaster prevention and control capacity of the mine, is beneficial to improving the extraction efficiency and is beneficial to large-area popularization and use.)

1. A borehole measuring device, characterized by: the device comprises a drilling hole depth measuring device and a drilling track measuring device; the drilling hole depth measuring device and the drilling track measuring device are connected through a measuring line and are respectively used for measuring the drilling hole depth and the drilling track;

The drilling hole depth measuring device comprises a retracting unit and a hole depth measuring unit; the drilling track determination device comprises a shell II and a fixing piece which is arranged at the tail of the shell II and used for fixing a measuring line; the measuring line penetrates through the hole depth measuring unit, and two ends of the measuring line are respectively wound on the winding and unwinding unit and the fixing piece.

2. the borehole measurement device of claim 1, wherein: an annular groove with an embedded resistance reducing piece is formed in the shell II along the circumferential direction; and the resistance reducing piece arranged in the annular groove protrudes out of the outer circle of the shell and is used for forming rolling connection between the drilling track measuring device and the hollow hole wall of the drill rod.

3. The borehole measurement device of claim 1, wherein: the winding and unwinding unit is embedded with a rotating handle, and the rotating handle is fixed at the rotating central point of the winding and unwinding unit and used for winding and unwinding the measuring line.

4. The borehole measurement device of claim 3, wherein: the retraction unit is supported by a supporting unit arranged below the retraction unit; the supporting unit is a triangle-like supporting structure and is used for forming stable support for the retracting unit and the hole depth measuring unit; the retraction unit is disc-shaped.

5. The borehole measurement device of claim 1, wherein: the hole depth metering unit comprises a shell I, a display device and a control panel which are arranged on the shell I, and a control unit I and a power supply unit I which are arranged in the shell I; the control unit I comprises a clock signal unit I and a data processing unit I which are respectively used for timing and processing the obtained length data of the measuring line; the hole depth metering unit is fixed on the retraction unit through a bent bracket.

6. the borehole measurement device of claim 1, wherein: a control unit II and a power supply unit II are arranged in the shell II; the control unit II comprises a clock signal unit II for timing, an acceleration motion unit, an angular velocity motion unit, a signal amplification and filtering processing unit and a data processing unit II for processing drilling track data; the acceleration motion unit is used for calculating the instantaneous acceleration and the displacement of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional coordinate system; the angular velocity motion unit is used for calculating an acceleration component of the drilling track determination device in the X, Y, Z axis direction in a three-dimensional coordinate system; the signal amplification and filtering processing unit is used for carrying out gain amplification processing on the data signals and filtering noise signals.

7. a method of measurement, characterized by: the method comprises a drilling track measuring method and a drilling hole depth measuring method; the drilling trajectory measuring method and the drilling hole depth measuring method are performed using the drilling measuring apparatus according to any one of claims 1 to 6 and have the following measuring steps:

s1: drilling a gas extraction drilled hole by utilizing the underground rotary drilling machine;

S2: triggering the clock signal unit I and the clock signal unit II to work, and respectively recording the initial measuring time of the drilling hole depth measuring device and the drilling track measuring device;

S3: measuring drilling track data information;

S4: measuring the data information of the depth of the drilled hole;

S5: and obtaining the drilling track and the drilling hole depth data information of the underground drilling according to the measurement results of the steps S3 and S4.

8. The measurement method according to claim 7, characterized in that: the drilling track measuring step comprises the following steps:

s3-1: feeding the drilling track measuring device into the drilling hole through the hollow hole of the drill rod by applying certain pressure;

S3-2: triggering an acceleration motion unit to start working, and calculating the instantaneous acceleration and the displacement of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional coordinate system;

S3-3: triggering the angular velocity movement unit to start working, and calculating an acceleration component of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional coordinate system;

s3-4: subtracting the acceleration component obtained in the step S3-3 from the instantaneous acceleration obtained in the step S3-2, and performing iterative operation to solve to obtain the spatial position motion information of the drilling track measuring device at the time node;

s3-5: the trigger signal amplifying and filtering unit starts to work, gain amplification processing is carried out on the displacement and space position movement information data signals obtained in the steps S3-2 to S3-4, noise signals are filtered, and space movement waveform information of the drilling track measuring device is obtained;

s3-6, processing the drilling track measurement information acquired in the step S3-5 by using a drilling track data processing unit to obtain drilling track data;

s3-7: after the drilling track data measurement is completed, the rotating handle is shaken to drive the retracting unit to retract the drilling track measuring device.

9. the measurement method according to claim 7, characterized in that: the drilling hole depth measuring step comprises the following steps:

s4-1: the drilling track measuring device is placed in a hollow hole of a drill rod by applying certain pressure, and simultaneously, the hole depth measuring unit is triggered to start working, the measuring starting time is recorded, and the measuring line is driven by a fixing piece to move towards the interior of the drill rod;

S4-2: when the drilling track determination device moves to the bottom of a hollow hole in a drill rod, the clock signal unit I records the measurement stop time, the drilling hole depth measurement unit stops measuring, and the data processing unit I is used for processing the length data of the measurement line and obtaining the drilling hole depth data;

s4-3: after the drilling hole depth data measurement is completed, the rotating handle is shaken to drive the retracting unit to retract the drilling track measuring device.

Technical Field

the present disclosure relates to measuring devices and methods, and particularly to a measuring device and a measuring method for a drill hole.

background

During mine operation, the coal and gas outburst can throw a large amount of coal and gas to a goaf in a short time, so that casualties and mechanical equipment damage are easily caused, and the coal and gas outburst becomes one of main disaster accidents threatening the safe and efficient production of mines. The risk of gas outbursts is increasingly severe with mines still extending deep at a production rate. The gas pre-pumping is a fundamental means for controlling gas disaster accidents, a perfect mine gas pre-pumping system is constructed, the balance of mining, digging and pumping of a mine is realized, and the gas pre-pumping is a fundamental measure for completely eradicating gas safety accidents. The gas extraction drill hole is used as a basic carrier for mine gas extraction, so that how to effectively monitor the extraction drill hole track and avoid a gas extraction blind area is realized, and the method has important significance for improving the gas extraction efficiency and comprehensively restraining coal and gas outburst accidents.

At present, in the aspect of measuring the underground drilling track of a coal mine, two technologies of a drilling track inclinometer and directional drilling while drilling and simultaneous measurement are mainly adopted. The drilling track inclinometer needs field workers to withdraw the drill rod after drilling is completed, and then the inclinometer is pushed into a drill hole, so that the measurement of the drilling track is realized; under the condition of soft coal quality, the method is easily influenced by the coal quality and the action of gravity, holes are easy to collapse during drilling, and the recovery of the inclination measuring device and the effective measurement of the drilling track are difficult to realize; the directional drilling machine measurement-while-drilling technology is that in the drilling process of the drilling machine, the measurement of the drilling track is realized through a sensor at the front end of a drill bit, and the directional drilling machine is limited by cost and application conditions and is difficult to popularize and apply in a large area. Meanwhile, although the "fine rules for preventing coal and gas outburst" stipulate clearly: the drilling track of the pre-extraction gas drilling hole needs to be measured, but effective drilling hole analysis and management means are still lacked in the current stage aiming at soft coal seams which are easy to cause coal and gas outburst accidents, construction drilling imaging and extraction standard drilling uniformity judgment are carried out based on the linear drilling track in an ideal state, misjudgment is easy to cause, and potential safety hazards are left. Therefore, an effective drilling track and hole depth measuring, managing and analyzing technical means is urgently needed, the control of the mine on the construction quality of the gas extraction drilling hole is improved, and the gas disaster prevention and control capacity of the mine is further improved.

Based on the above problems, the present invention provides a borehole measurement apparatus and a measurement method. The borehole measuring device and the measuring method are beneficial to avoiding potential safety hazards caused by inaccurate detection of track and hole depth information during gas extraction borehole, avoiding misjudgment, realizing accurate prediction of gas pre-extraction borehole information under a coal mine, improving control over construction quality of the gas extraction borehole, and further improving gas disaster prevention and control capacity of the mine; and the measuring device is simple, the measuring method is feasible, the extraction efficiency is favorably improved, and the large-area popularization and use are favorably realized.

Disclosure of Invention

in view of the above, the invention relates to a borehole measuring device and a borehole measuring method, which are beneficial to avoiding potential safety hazards caused by inaccurate detection of track and hole depth information during gas extraction borehole, avoiding misjudgment, realizing accurate prediction of gas pre-extraction borehole information under a coal mine, improving control over construction quality of the gas extraction borehole, and further improving gas disaster prevention and control capability of the mine; and the measuring device is simple, the measuring method is feasible, the extraction efficiency is favorably improved, and the large-area popularization and use are favorably realized.

The drilling measuring device comprises a drilling hole depth measuring device and a drilling track measuring device; the drilling hole depth measuring device and the drilling track measuring device are connected through a measuring line and are respectively used for measuring the drilling hole depth and the drilling track; the measuring wire is a flexible measuring wire, the specification and material selection of the flexible measuring wire belong to the prior art, and for example, a flexible galvanized industrial steel wire rope with the diameter of 1.8-mm and the tensile strength of not less than 2200MPa is adopted;

the drilling hole depth measuring device comprises a retracting unit and a hole depth measuring unit; if the hole depth metering unit is fixed on the retracting unit through a support, the retracting unit is favorable for supporting the hole depth metering unit, and the retracting unit does not influence the retracting of the measuring line; the drilling track determination device comprises a shell II and a fixing piece which is arranged at the tail of the shell II and used for fixing a measuring line; the fixing piece is preferably a fixing ring, so that the fixing of the measuring line is facilitated; the measuring line penetrates through the hole depth measuring unit, and two ends of the measuring line are respectively wound on the retracting unit and the fixing piece; when the drilling track and the drilling hole depth are measured, the drilling track measuring device is arranged in the hollow hole of the drill rod through the retracting unit and the measuring line connecting the retracting unit and the fixing piece, after the hole depth measuring unit of the drilling hole depth measuring device and the control unit of the drilling track measuring device are triggered to carry out corresponding measurement and processing, the method has the advantages that the drilling track and the drilling hole depth data information are obtained, accurate prediction of underground gas pre-drainage drilling information of the coal mine is favorably realized, potential safety hazards caused by inaccurate detection of the track and the hole depth information during gas extraction drilling are favorably avoided, the problem that the detection of the drilling track and the hole depth data information is unclear due to the influence of coal quality and gravity is favorably avoided, misjudgment is favorably avoided, the control on the construction quality of the gas extraction drilling is favorably improved, and the gas disaster prevention and control capacity of the mine is favorably improved.

further, an annular groove with a resistance reducing piece embedded therein is formed in the shell II along the circumferential direction; the resistance reducing piece arranged in the annular groove protrudes out of the outer circle of the shell II and is used for forming rolling connection between the drilling track measuring device and the hollow hole wall of the drill rod; the resistance reducing piece is a spherical resistance reducing steel ball, and is higher than the groove height (namely the groove depth) of the annular groove and protrudes out of the excircle of the shell II, so that the rolling connection between the shell II and the hollow hole wall of the drill rod is favorably formed, and the friction resistance between a drilling track measuring device arranged in the hollow hole of the drill rod and the hollow hole wall of the drill rod is favorably reduced;

furthermore, a rotating handle is embedded in the winding and unwinding unit and fixed at the rotating central point of the winding and unwinding unit for winding and unwinding the measuring line; the rotary handle is preferably a hand-operated rotary crank handle, so that the operation is convenient and the cost is low; the fixed connection of the hand-operated rotating handle on the retracting unit belongs to the prior art, and is not described again if the hand-operated rotating handle is connected through a screw and a nut; one end of the rotary handle is connected to a central point of the winding and unwinding unit during rotation, and the other end of the rotary handle forms a free end, so that the hand-cranking operation is facilitated, and the lower part and the recovery of a measuring line are facilitated; the selection of the material of the rotating handle belongs to the prior art, and if the rotating handle is made of cast iron with high strength and high hardness, the material is not described again;

further, the retraction unit is supported by a supporting unit arranged below the retraction unit; the supporting unit is a triangle-like supporting structure and is used for forming stable support for the retracting unit and the hole depth measuring unit; the stable support of the retracting unit and the hole depth measuring unit is facilitated; the retraction unit is disc-shaped;

further, the hole depth metering unit comprises a shell I, a display device and a control panel which are arranged on the shell I, and a control unit I and a power supply unit I which are arranged in the shell I; the control unit I comprises a clock signal unit I and a data processing unit I which are respectively used for timing and processing the obtained length data of the measuring line; two ends of the hole depth metering unit in the length direction are provided with threading holes for a measuring thread to pass through; the power supply unit I is used for supplying power to the hole depth metering unit; the hole depth metering unit is fixed on the retracting unit through the bent bracket, so that the retracting unit is not influenced to retract the measuring line while the hole depth metering unit is supported;

further, a control unit II and a power supply unit II are arranged in the shell II 9; the control unit II comprises a clock signal unit II for timing, an acceleration motion unit, an angular velocity motion unit, a signal amplification and filtering processing unit and a data processing unit II for processing drilling track data; the acceleration motion unit is used for calculating the instantaneous acceleration and the displacement of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional coordinate system; the angular velocity motion unit is used for calculating an acceleration component of the drilling track determination device in the X, Y, Z axis direction in a three-dimensional coordinate system; the signal amplification and filtering processing unit is used for performing gain amplification processing on the data signals and filtering noise signals; and the power supply unit II is used for supplying power to the drilling hole depth measuring device.

the invention also provides a measuring method, which comprises a drilling track measuring method and a drilling hole depth measuring method; the drilling track measuring method and the drilling hole depth measuring method are carried out by adopting the drilling measuring device and have the following measuring steps:

S1: drilling a gas extraction drilled hole by utilizing the underground rotary drilling machine; adopting a common underground rotary drilling machine;

s2: triggering the clock signal unit I and the clock signal unit II to work, and respectively recording the initial measuring time of the drilling hole depth measuring device and the drilling track measuring device;

s3: measuring drilling track data information;

S4: measuring the data information of the depth of the drilled hole;

s5: according to the measurement results of the steps S3 and S4, obtaining the drilling track and the drilling hole depth data information of the underground drilling; through the measurement to drilling orbit and drilling hole depth, do benefit to the accurate prediction that realizes the colliery underground gas pre-drainage drilling information, do benefit to and avoid the orbit when adopting the drilling because of the gas and take out, hole depth information detection is inaccurate leads to leaving over the potential safety hazard, do benefit to and avoid the drilling orbit that causes because of coal quality and the influence of gravity, hole depth data information detection unclear problem, do benefit to and avoid erroneous judgement, do benefit to and improve the control to gas and take out the drilling construction quality, and then do benefit to the gas disaster prevention and cure ability that improves the mine.

further, the drilling trajectory measuring step includes:

S3-1: feeding the drilling track measuring device into the drilling hole through the hollow hole of the drill rod by applying certain pressure;

S3-2: triggering an acceleration motion unit to start working, and calculating the instantaneous acceleration and the displacement of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional OXYZ space position coordinate system; the method comprises the following specific steps:

Setting the initial position of the drilling track measuring device as a prediction original point O, and enabling the sampling time interval of the acceleration motion unit to be delta t, wherein the displacement in the sampling time interval range meets the formula (1):

Wherein, the movement speed of the drilling track determination device satisfies the formula (2):

further, the instantaneous acceleration a of the drilling track measuring device in the X, Y, Z axis direction in the three-dimensional OXYZ space position coordinate system is calculated by the acceleration motion unit_x(i),a_y(i),a_z(i) and the amount of displacement l;

s3-3: triggering the angular velocity movement unit to start working, and calculating an acceleration component of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional coordinate system; aiming at the problem that a drilling track measuring device is easily influenced by rotation and gravity g of the device in the lowering process so that a reference position coordinate system OX1Y1Z1 and an OXYZ space coordinate system are not repeated, the motion posture of the drilling track measuring device can be recorded through an angular velocity motion unit; assuming that the motion offset between the reference position coordinate system OX1Y1Z1 where the borehole trajectory measuring device is located and the xyz space coordinate system is τ, where τ is α + β + γ, the projection (τ x, τ Y, τ Z) of the reference position coordinate system OX1Y1Z1 where the borehole trajectory measuring device is located on the xyz space coordinate system satisfies equation (3):

solving from the above equation, equation (4) can be obtained:

in the formula (4), (τ x, τ y, τ z) can be directly measured by the angular velocity motion unit, and then the component (gx, gy, gz) of the gravity g in the xyz spatial coordinate system is formula (5):

calculating acceleration components (gx, gy and gz) in X, Y and Z axis directions in an OXYZ space coordinate system due to the influence of device rotation and gravity g in the measurement process;

s3-4: subtracting the acceleration component obtained in the step S3-3 from the instantaneous acceleration obtained in the step S3-2, and performing iterative operation to solve to obtain the spatial position motion information of the drilling track measuring device at the time node;

s3-5: the trigger signal amplifying and filtering unit starts to work, gain amplification processing is carried out on the displacement and space position movement information data signals obtained in the steps S3-2 to S3-4, noise signals are filtered, and space movement waveform information of the drilling track measuring device is obtained;

s3-6, processing the drilling track measurement information acquired in the step S3-5 by using a drilling track data processing unit to obtain drilling track data;

S3-7: after the drilling track data measurement is completed, the rotating handle is shaken to drive the retracting unit to retract the drilling track measuring device.

further, the drilling hole depth measuring step includes:

s4-1: the drilling track measuring device is placed in a hollow hole of a drill rod by applying certain pressure, and simultaneously, the hole depth measuring unit is triggered to start working, the measuring starting time is recorded, and the measuring line is driven by a fixing piece to move towards the interior of the drill rod;

s4-2: when the drilling track determination device moves to the bottom of a hollow hole in a drill rod, the clock signal unit I records the measurement stop time, the drilling hole depth measurement unit stops measuring, and the data processing unit I is used for processing the length data of the measurement line and obtaining the drilling hole depth data;

s4-3: after the drilling hole depth data measurement is completed, the rotating handle is shaken to drive the retracting unit to retract the drilling track measuring device.

The invention has the beneficial effects that: the drilling measuring device and the measuring method are a press-in combined drag type measuring device and a drilling track and drilling hole depth measuring method, the measuring device and the measuring method are beneficial to avoiding potential safety hazards caused by inaccurate track and hole depth information detection during gas extraction drilling, avoiding the problem of unclear drilling track and hole depth data information detection caused by the influence of coal quality and gravity, avoiding misjudgment, realizing accurate prediction of gas pre-extraction drilling information under a coal mine, improving control on the construction quality of gas extraction drilling, and further improving gas disaster prevention and control capacity of the mine; and the measuring device is simple, the measuring method is feasible, the extraction efficiency is favorably improved, and the large-area popularization and use are favorably realized.

drawings

the invention is further described below with reference to the following figures and examples:

FIG. 1 is a schematic structural view of a device for measuring a depth of a drilled hole according to the present invention;

FIG. 2 is a schematic structural diagram of a drilling trajectory measuring device according to the present invention;

FIG. 3 is a schematic view of the measuring process of the drilling trajectory and the drilling depth of the present invention;

FIG. 4 is a diagram illustrating the effect of the drilling trajectory signal amplification and filtering process of the present invention;

fig. 5 is a schematic view of the monitoring effect of the drilling trajectory according to the present invention.

Detailed Description

fig. 1 is a schematic structural diagram of a drilling hole depth measuring device of the present invention, fig. 2 is a schematic structural diagram of a drilling track measuring device of the present invention, fig. 3 is a schematic structural diagram of a drilling track and a drilling hole depth measuring process of the present invention, fig. 4 is a schematic diagram of a drilling track signal amplification filtering processing effect of the present invention, fig. 5 is a schematic diagram of a drilling track monitoring effect of the present invention, as shown in the drawings: the drilling measuring device of the embodiment comprises a drilling hole depth measuring device 1 and a drilling track measuring device 2; the drilling hole depth measuring device 1 and the drilling track measuring device 2 are connected through a measuring line 6 and are respectively used for measuring the drilling hole depth and the drilling track; the measuring wire 6 is a flexible measuring wire, the specification and material selection of the flexible measuring wire belong to the prior art, and for example, a flexible galvanized industrial steel wire rope with the diameter of 1.8-mm and the tensile strength of not less than 2200MPa is adopted;

the drilling hole depth measuring device 1 comprises a storing and releasing unit 4 and a hole depth measuring unit 5; if the hole depth metering unit 5 is fixed on the winding and unwinding unit 4 through a support, the winding and unwinding of the measuring line 6 by the winding and unwinding unit 4 is not influenced while the support of the hole depth metering unit 5 is formed; the drilling track determination device 2 comprises a shell II9 and a fixing piece 10 which is arranged at the tail part of the shell II9 and used for fixing a measuring line 6; the fixing member 10 is preferably a fixing ring, which is beneficial to fixing the measuring line 6; the measuring line 6 penetrates through the hole depth measuring unit 5, and two ends of the measuring line are respectively wound on the winding and unwinding unit 4 and the fixing piece 10; when the drilling track and the drilling hole depth are measured, the drilling track measuring device 2 is arranged in the hollow hole of the drill rod through the retractable unit 4 and the measuring line 6 connecting the retractable unit 4 and the fixing piece 10, after the corresponding measurement and processing are carried out by triggering the hole depth measuring unit 5 of the drilling hole depth measuring device 1 and the control unit of the drilling track measuring device 3, the drilling track and the drilling hole depth data information are obtained, so that accurate prediction of underground gas pre-extraction drilling information of the coal mine is favorably realized, potential safety hazards caused by inaccurate detection of track and hole depth information during gas extraction drilling are favorably avoided, the problem that the detection of the drilling track and the hole depth data information is unclear due to the influence of coal quality and gravity is favorably avoided, misjudgment is favorably avoided, the control on the construction quality of the gas extraction drilling is favorably improved, and the gas disaster prevention and control capability of the mine is favorably improved; the drill rod is not shown in the figures.

in this embodiment, the casing II9 is provided with an annular groove 12 in which a resistance reducing member is embedded along the circumferential direction; the resistance reducing piece 11 arranged in the annular groove 12 protrudes out of the outer circle of the shell II9 and is used for forming rolling connection between the drilling track measuring device 2 and the hollow hole wall of the drill rod; if the resistance reducing piece 11 is a spherical resistance reducing steel ball, the resistance reducing piece 11 is higher than the groove height (namely the groove depth) of the annular groove 12 and enables the resistance reducing piece 11 to protrude out of the outer circle of the shell II9, so that the rolling connection between the shell II9 and the hollow hole wall of the drill rod is favorably formed, and the friction resistance between the drilling track measuring device 2 arranged in the hollow hole of the drill rod and the hollow hole wall of the drill rod is favorably reduced.

In the embodiment, a rotating handle 3 is embedded in the winding and unwinding unit 4, and the rotating handle 3 is fixed at the rotating central point of the winding and unwinding unit 4 and used for winding and unwinding a measuring line 6; the rotary handle 3 is preferably a hand-operated rotary crank handle, so that the operation is convenient and the cost is low; the fixed connection of the hand-operated rotating handle 3 on the retraction unit 4 belongs to the prior art, and is not described again if the hand-operated rotating handle is connected through a screw and a nut; one end of the rotating handle 3 is connected to a central point of the winding and unwinding unit 4 during rotation, and the other end forms a free end, so that the manual operation is facilitated, and the lower part and the recovery of the measuring line 6 are facilitated; the selection of the material of the rotating handle 3 belongs to the prior art, for example, a cast iron material with high strength and high hardness is adopted, and is not described herein again.

in this embodiment, the retraction unit 4 is supported by a support unit 7 arranged below the retraction unit; the supporting unit 7 is a triangle-like supporting structure and is used for forming stable support for the retracting unit 4 and the hole depth measuring unit 5; the stable support of the retracting unit 4 and the hole depth measuring unit 5 is facilitated; the storage unit 4 is disc-shaped.

In this embodiment, the hole depth measuring unit 5 includes a casing I, a display device and a control panel 5-1 disposed on the casing I, and a control unit I and a power supply unit I disposed in the casing I; the control unit I comprises a clock signal unit I and a data processing unit I which are respectively used for timing and processing the obtained length data of the measuring line; the shell I, the display device, the clock signal unit I, the data processing unit I and the power supply unit I are not drawn in the figure; two ends of the hole depth metering unit 5 in the length direction are provided with threading holes for the measuring threads 6 to pass through; the power supply unit I is used for supplying power to the hole depth metering unit 5; the hole depth metering unit 5 is fixed on the winding and unwinding unit 4 through the crank-shaped support 8, so that the winding and unwinding of the measuring line 6 by the winding and unwinding unit 4 are not influenced while the support of the hole depth metering unit 5 is formed.

in this embodiment, a control unit II and a power supply unit II are disposed in the casing II 9; the control unit II comprises a clock signal unit II for timing, an acceleration motion unit 13, an angular velocity motion unit 14, a signal amplification and filtering processing unit 15 and a data processing unit II16 for processing the drilling trajectory data; the acceleration motion unit 13 is used for calculating the instantaneous acceleration and displacement of the drilling trajectory measuring device 2 in the direction of X, Y, Z axis in the three-dimensional coordinate system; the angular velocity motion unit 14 is used for calculating an acceleration component of the drilling trajectory determination device 2 in the X, Y, Z axis direction in a three-dimensional coordinate system; the signal amplification and filtering processing unit 15 is configured to perform gain amplification processing on the data signal and filter out a noise signal; the clock signal unit II is not drawn in the figure; the power supply unit II17 is used for supplying power to the drilling hole depth measuring device 2.

The embodiment also provides a measuring method, which comprises a drilling track measuring method and a drilling hole depth measuring method; the drilling track measuring method and the drilling hole depth measuring method are carried out by adopting the drilling measuring device and have the following measuring steps:

S1: drilling a gas extraction drilled hole by utilizing the underground rotary drilling machine; adopting a common underground rotary drilling machine;

s2: triggering a clock signal unit I and a clock signal unit II to work, and respectively recording the initial measuring time of the drilling hole depth measuring device 1 and the drilling track measuring device 2;

S3: measuring drilling track data information;

S4: measuring the data information of the depth of the drilled hole;

s5: according to the measurement results of the steps S3 and S4, obtaining the drilling track and the drilling hole depth data information of the underground drilling; through the measurement to drilling orbit and drilling hole depth, do benefit to the accurate prediction that realizes the colliery underground gas pre-drainage drilling information, do benefit to and avoid the orbit when adopting the drilling because of the gas and take out, hole depth information detection is inaccurate leads to leaving over the potential safety hazard, do benefit to and avoid the drilling orbit that causes because of coal quality and the influence of gravity, hole depth data information detection unclear problem, do benefit to and avoid erroneous judgement, do benefit to and improve the control to gas and take out the drilling construction quality, and then do benefit to the gas disaster prevention and cure ability that improves the mine.

In this embodiment, the drilling trajectory measuring step includes:

s3-1: feeding the drilling track measuring device into the drilling hole through the hollow hole of the drill rod by applying certain pressure;

s3-2: triggering the acceleration motion unit 13 to start working, and calculating the instantaneous acceleration and displacement of the drilling track measuring device in the X, Y, Z axis direction in the three-dimensional XYZ space position coordinate system; the method comprises the following specific steps:

setting the initial position of the drilling track measuring device as a prediction original point O, and enabling the sampling time interval of the acceleration motion unit 13 to be delta t, wherein the displacement in the sampling time interval satisfies the formula (1):

wherein, the movement speed of the drilling track determination device satisfies the formula (2):

Further, the instantaneous acceleration a of the drilling trajectory measuring device in the X, Y, Z axis direction in the three-dimensional OXYZ space position coordinate system is calculated by the acceleration motion unit 13_x(i),a_y(i),a_z(i) and the amount of displacement l;

S3-3: triggering the angular velocity movement unit 14 to start working, and calculating an acceleration component of the drilling track measuring device in the X, Y, Z axis direction in a three-dimensional coordinate system; aiming at the problem that a reference position coordinate system OX1Y1Z1 and an OXYZ space coordinate system are not repeated due to the fact that the drilling track measuring device 2 is susceptible to device rotation and gravity g in the lowering process, the motion posture of the drilling track measuring device can be recorded through the angular velocity motion unit 14; assuming that the movement offset between the reference position coordinate system OX1Y1Z1 in which the borehole trajectory measuring device 2 is located and the xyz space coordinate system is τ, where τ is α + β + γ, the projection (τ x, τ Y, τ Z) of the reference position coordinate system OX1Y1Z1 in which the borehole trajectory measuring device 2 is located on the xyz space coordinate system satisfies equation (3):

solving from the above equation, equation (4) can be obtained:

In the formula (4), (τ x, τ y, τ z) can be directly measured by the angular velocity motion unit, and then the component (gx, gy, gz) of the gravity g in the xyz spatial coordinate system is formula (5):

calculating acceleration components (gx, gy and gz) in X, Y and Z axis directions in an OXYZ space coordinate system due to the influence of device rotation and gravity g in the measurement process;

s3-4: subtracting the acceleration component obtained in the step S3-3 from the instantaneous acceleration obtained in the step S3-2, and performing iterative operation to solve to obtain the spatial position motion information of the drilling track measuring device 2 at the time node;

S3-5: the trigger signal amplifying and filtering unit 15 starts to work, gain amplification processing is carried out on the displacement and spatial position motion information data signals obtained in the steps S3-2 to S3-4, noise signals are filtered, and spatial motion waveform information of the drilling track measuring device is obtained;

s3-6, processing the drilling track measurement information acquired in the step S3-5 by using a drilling track data processing unit to obtain drilling track data;

s3-7: after the drilling track data measurement is completed, the rotating handle 3 is shaken to drive the retracting unit 4 to retract the drilling track measuring device 2.

In this embodiment, the drilling hole depth measuring step includes:

s4-1: the drilling track determination device 2 is placed in a hollow hole of a drill rod by applying certain pressure, a hole depth measurement unit is triggered to start working, the measurement starting time is recorded, and a measurement line 6 is driven to move towards the interior of the drill rod through a fixing piece 10;

s4-2: when the drilling track determination device 2 moves to the bottom of a hollow hole in a drill rod, the clock signal unit I records the measurement stop time, the drilling hole depth metering unit 5 stops measuring, and the data processing unit I is used for processing the length data of the measuring line 6 and obtaining the drilling hole depth data;

s4-3: after the drilling hole depth data measurement is completed, the rotating handle 3 is shaken to drive the retracting unit 4 to retract the drilling track measuring device 2.

finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.