阅读说明：本技术 矿用工作面推进度测量方法及装置 (Method and device for measuring propulsive degree of mining working face ) 是由 张辉 马冰 赵阳羲 李帅 蔡志华 于 2021-05-11 设计创作，主要内容包括：本发明提供一种矿用工作面推进度测量方法及装置,其中,矿用工作面推进度测量方法包括以下步骤：利用进行推进的液压支架上的第一点与相邻的已完成推进的液压支架上的第二点之间的实时距离获得液压支架的单次移动量的第一测量结果；通过测量液压支架与回采面煤壁的垂直距离变化量获得单次移动量的第二测量结果；第一测量结果与第二测量结果求平均值获得单次推进度；根据单次推进度获得总推进度。本发明提供的矿用工作面推进度测量方法及装置,将两种单次移动量获得途径相互印证,相较于常用的推进度测量方法,受工作面粉尘及人员移动等因素的干扰小,测量准确度更高。(The invention provides a mining working face propulsive degree measuring method and a mining working face propulsive degree measuring device, wherein the mining working face propulsive degree measuring method comprises the following steps: obtaining a first measurement result of the single movement of the hydraulic support by using the real-time distance between a first point on the hydraulic support for advancing and a second point on the adjacent hydraulic support for completing advancing; obtaining a second measurement result of the single movement amount by measuring the vertical distance variation of the hydraulic support and the coal wall of the stope face; averaging the first measurement result and the second measurement result to obtain a single pushing rate; and obtaining the total pushing progress according to the single pushing progress. According to the mining working face propulsive degree measuring method and device provided by the invention, two single movement amount obtaining ways are mutually verified, and compared with a common propulsive degree measuring method, the mining working face propulsive degree measuring method and device are slightly interfered by factors such as working face dust and personnel movement, and the measuring accuracy is higher.)

1. A mining working face propulsive degree measuring method is characterized by comprising the following steps:

obtaining a first measurement result of the single movement of the hydraulic support by using the real-time distance between a first point on the hydraulic support for advancing and a second point on the adjacent hydraulic support for completing advancing;

in the process that the hydraulic support for advancing finishes advancing, obtaining a second measurement result of the single movement of the hydraulic support by measuring the variation of the vertical distance between the hydraulic support for advancing and the coal wall of the stoping face;

averaging the first measurement result and the second measurement result to obtain a single pushing rate;

and obtaining the total pushing progress according to the single pushing progress.

2. The mining face propulsive effort measurement method of claim 1, wherein the obtaining a first measurement of a single movement of the hydraulic mount using a real-time distance between a first point on the hydraulic mount performing the propulsion and a second point on an adjacent hydraulic mount having completed the propulsion includes:

obtaining the vertical distance h between adjacent hydraulic supports;

measuring the distance h between the first point and the second point before propulsion₁；

Measuring the distance h between the first point and the second point after propulsion₂；

The first measurement result Δ h is obtained by the following formula:

3. the mining face propulsive measure of claim 2, wherein the total propulsive measure is obtained by:

wherein Δ L is the second measurement;

and n is the pushing times of the hydraulic support.

4. The utility model provides a mining working face degree of advancement measuring device which characterized in that includes:

the first distance measuring unit is used for measuring the real-time distance between a first point on the hydraulic support for propelling and a second point on the adjacent hydraulic support for propelling, and measuring the distance between the adjacent hydraulic supports;

the second distance measuring unit is used for measuring the vertical distance variation of the hydraulic support for propelling and the coal wall of the stoping face;

and the controller is respectively electrically connected with the first distance measuring unit and the second distance measuring unit and is used for obtaining a single pushing progress and a total pushing progress according to the measuring results of the first distance measuring unit and the second distance measuring unit.

5. The mining face propulsive degree measuring device of claim 4, further comprising a pressure sensor, wherein a measuring end of the pressure sensor is connected into an oil guide pipe of the hydraulic support, and the pressure sensor is electrically connected with the controller.

6. The mining face propulsive degree measuring device of claim 4, wherein the first ranging unit includes a wireless ranging sensor and a wireless tag, one of the wireless ranging sensor and the wireless tag is disposed at a position of the first point, the other of the wireless ranging sensor and the wireless tag is disposed at a position of the second point, and the wireless ranging sensor is electrically connected with the controller.

7. The mining face propulsive degree measuring device of claim 4, wherein the second ranging unit includes a laser sensor disposed on the hydraulic support that propels, a detection end of the laser sensor facing the stope face coal wall.

8. The mining face aggressiveness measurement device of claim 7, wherein the laser sensor is disposed at a location where the first point is located.

9. The mining face aggressiveness measurement device of claim 4, further comprising a power circuit electrically connected to the controller for supplying electrical energy.

10. The mining face propulsive degree measuring device of claim 4, further comprising a display device electrically connected with the controller for displaying the measurement results of the first and second ranging units and the single and total progress rates.

Technical Field

The invention relates to the technical field of mining equipment, in particular to a method and a device for measuring the propulsive degree of a mining working face.

Background

With the continuous development of mine technology, the fully mechanized caving mining technology has the characteristics of high efficiency, high yield, safety and the like, and becomes a main technology for mining thick coal seams.

The currently common method for measuring the degree of propulsion is as follows:

1. manually recording the number n of frame moving times, and calculating the frame moving step distance every time according to a fixed value to obtain the pushing progress.

2. And (4) measuring the relative variation between the position and the coal wall by using an infrared laser ranging sensor to calculate the pushing progress.

The above method has the following disadvantages:

1. when manual measurement and recording are carried out, personnel reading errors exist, and the frame moving step pitch possibly has deviation, so that the statistical value is inaccurate.

2. The dust on the fully mechanized mining face is serious, the measurement access of the laser sensor is easy to be interfered, and the data analysis is directly influenced by the interference of personnel moving factors.

Disclosure of Invention

The invention provides a method and a device for measuring the propulsive degree of a mining working face, which are used for solving the problem that the numerical value of a propulsive degree measuring method in the prior art is inaccurate.

The invention provides a mining working face propulsion degree measuring method, which comprises the following steps:

obtaining a first measurement result of the single movement of the hydraulic support by using the real-time distance between a first point on the hydraulic support for advancing and a second point on the adjacent hydraulic support for completing advancing;

in the process that the hydraulic support for advancing finishes advancing, obtaining a second measurement result of the single movement of the hydraulic support by measuring the variation of the vertical distance between the hydraulic support for advancing and the coal wall of the stoping face;

averaging the first measurement result and the second measurement result to obtain a single pushing rate;

and obtaining the total pushing progress according to the single pushing progress.

According to the mining working face propulsive degree measuring method provided by the invention, the obtaining of the first measuring result of the single movement amount of the hydraulic support by using the real-time distance between the first point on the hydraulic support which performs the propulsive and the second point on the adjacent hydraulic support which completes the propulsive comprises the following steps:

obtaining the vertical distance h between adjacent hydraulic supports;

measuring the distance h1 between the first point and the second point before propulsion;

measuring the distance h2 between the first point and the second point after propulsion;

the first measurement result Δ h is obtained by the following formula:

according to the mining working face propulsive degree measuring method provided by the invention, the total propulsive degree is obtained through the following formula:

wherein Δ L is the second measurement;

and n is the pushing times of the hydraulic support.

The invention also provides a mining working face thrust degree measuring device, which comprises:

the first distance measuring unit is used for measuring the real-time distance between a first point on the hydraulic support for propelling and a second point on the adjacent hydraulic support for propelling, and measuring the distance between the adjacent hydraulic supports;

the second distance measuring unit is used for measuring the vertical distance variation of the hydraulic support for propelling and the coal wall of the stoping face;

and the controller is respectively electrically connected with the first distance measuring unit and the second distance measuring unit and is used for obtaining a single pushing progress and a total pushing progress according to the measuring results of the first distance measuring unit and the second distance measuring unit.

The mining working face propulsion degree measuring device further comprises a pressure sensor, a measuring end of the pressure sensor is connected into an oil guide pipe of the hydraulic support, and the pressure sensor is electrically connected with the controller.

According to the mining working face propulsion degree measuring device provided by the invention, the first ranging unit comprises a wireless ranging sensor and a wireless tag, one of the wireless ranging sensor and the wireless tag is arranged at the position of the first point, the other one of the wireless ranging sensor and the wireless tag is arranged at the position of the second point, and the wireless ranging sensor is electrically connected with the controller.

According to the mining working face propulsion degree measuring device provided by the invention, the second distance measuring unit comprises a laser sensor, the laser sensor is arranged on the hydraulic support for propulsion, and the detection end of the laser sensor faces the coal wall of the stope face.

According to the mining working face propulsion degree measuring device provided by the invention, the laser sensor is arranged at the position of the first point.

The mining working face propulsion degree measuring device further comprises a power circuit, wherein the power circuit is electrically connected with the controller and used for supplying electric energy.

The mining working face propulsion degree measuring device further comprises a display device, wherein the display device is electrically connected with the controller and used for displaying the measuring results of the first distance measuring unit and the second distance measuring unit, the single propulsion degree and the total propulsion degree.

According to the mining working face pushing degree measuring method and device, the single movement amount obtained by the real-time distance of the adjacent hydraulic supports and the single movement amount obtained by measuring the vertical distance variation of the hydraulic support for pushing and the coal wall of the stoping face are averaged to obtain the single pushing degree, the two single movement amounts are mutually verified, and compared with a common pushing degree measuring method, the mining working face pushing degree measuring method and device are less interfered by working face dust, personnel movement and other factors, and the measuring accuracy is higher.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a flow chart of a method for measuring the propulsive degree of a mining working surface provided by the invention;

FIG. 2 is a state diagram of a mining working face propulsion degree measuring device provided by the invention when a hydraulic support is not propelled;

FIG. 3 is a state diagram of the mining working face propulsion degree measuring device provided by the invention when the propulsion of the hydraulic support is completed;

fig. 4 is a schematic circuit connection structure diagram of the mining working face propulsion degree measuring device provided by the invention.

Reference numerals:

1. a stope coal wall; 2. A hydraulic support; 3. A wireless ranging sensor;

4. a laser sensor; 5. A controller; 6. A pressure sensor;

7. a power supply circuit; 8. A CAN communication circuit; 9. display device

10. A wireless tag.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The mining working face propulsive degree measuring method of the embodiment of the invention is described below with reference to fig. 1-4, and comprises the following steps:

s1, obtaining a first measurement result Δ h of the single movement amount of the hydraulic mount 2 using the real-time distance between the first point on the hydraulic mount 2 where the propulsion is performed and the second point on the adjacent hydraulic mount 2 where the propulsion is completed. In the measuring process, the hydraulic supports 2 cannot be interfered by the factors such as dust on the fully mechanized coal mining face and personnel movement, and the measuring result is accurate.

Furthermore, the driving oil pressure information of the hydraulic support 2 can be collected, so that whether the hydraulic support 2 is moved and whether the movement is completed or not can be confirmed, and the stability of data analysis is improved.

And S2, obtaining a second measurement result of the single movement of the hydraulic support 2 by measuring the variation of the vertical distance between the hydraulic support 2 for advancing and the coal wall 1 of the stope face in the process that the hydraulic support 2 for advancing completes advancing. Noting the second measurement result as Δ L, the vertical distance between the hydraulic support 2 and the stope face coal wall 1 before advancing is L1, and the vertical distance between the hydraulic support 2 and the stope face coal wall 1 after single advancing is L, then: Δ L ═ L1-L.

S3, averaging the first measurement result and the second measurement result to obtain a single-time estimated progress Δ S, where Δ S is (Δ h + Δ L)/2. The first measurement result delta h obtained through the relative displacement of the adjacent hydraulic supports 2 and the second measurement result delta L obtained through the traditional measurement method are averaged to verify mutually, so that the measurement result is more accurate and is less influenced by external factors.

S4, obtaining the total pushing rate according to the single pushing rate, and when the pushing times is n, obtaining the total pushing rate through the following formula:

in an embodiment of the present invention, the obtaining of the first measurement result of the single movement amount of the hydraulic support 2 by using the real-time distance between the first point on the hydraulic support 2 performing the propulsion and the second point on the adjacent hydraulic support 2 completing the propulsion in step S1 specifically includes:

and S11, obtaining the vertical distance h between the adjacent hydraulic supports 2, wherein the process can be obtained by measuring the vertical distance h along the direction parallel to the coal wall 1 of the stope face (namely, the direction perpendicular to the pushing direction of the hydraulic supports 2) by a distance measuring sensor.

S12, measuring the distance h between the first point and the second point before propulsion₁；

S13, measuring the distance h between the first point and the second point after propulsion₂；

S14, obtaining a first measurement result Δ h by the following formula:

in the calculation process, the distance components of the first point and the second point before and after propulsion in the propulsion direction are respectively obtained by using the pythagorean theorem, and the difference between the distance components of the first point and the second point after propulsion in the propulsion direction and the distance components of the first point and the second point before propulsion in the propulsion direction is obtained, so that the first measurement result delta h of the single movement amount of the hydraulic support 2 can be obtained. The single movement amount of the hydraulic support 2 is obtained by skillfully utilizing the relative position of the first point and the second point, which is beneficial to simplifying the measurement process and reducing the external interference.

In an embodiment of the present invention, a mining working face propulsive degree measuring device is further provided, and the mining working face propulsive degree measuring device described below and the mining working face propulsive degree measuring method described above may be referred to in correspondence with each other, and the mining working face propulsive degree measuring device described below may be applied to the mining working face propulsive degree measuring method described above.

The mining working face propulsion degree measuring device comprises a first measuring unit, a second measuring unit and a controller 5. The first distance measuring unit is used for measuring the real-time distance between a first point on the hydraulic support 2 for propelling and a second point on the adjacent hydraulic support 2 for completing propelling, and is used for measuring the distance between the adjacent hydraulic supports 2. For the purpose of measurement, the first point and the second point may be selected from two points on opposite sides of the adjacent hydraulic supports 2, in which case the distance between the first point and the second point is the distance between the adjacent hydraulic supports 2 when the first point and the second point are aligned in a direction parallel to the stope face coal wall 1.

And the second distance measuring unit is used for measuring the vertical distance variation of the hydraulic support 2 for propelling and the coal wall 1 of the stope face.

The controller 5 is electrically connected with the first distance measuring unit and the second distance measuring unit respectively and is used for obtaining a single push progress and a total push progress according to the measuring results of the first distance measuring unit and the second distance measuring unit. The controller 5 may employ an MCU microcontroller. The controller 5 and the first distance measuring unit, the second distance measuring unit and the like CAN be connected through a CAN communication circuit 8.

In an embodiment of the invention, the mining working face propulsion degree measuring device further comprises a pressure sensor 6, a measuring end of the pressure sensor 6 is connected into an oil guide pipe of the hydraulic support 2, the pressure sensor 6 is electrically connected with the controller 5, the pressure sensor 6 can acquire and obtain oil pressure information of the hydraulic support 2, and the controller 5 judges whether the hydraulic support 2 is moved and whether the movement is completed or not according to the oil pressure information acquired by the pressure sensor 6, so that the stability of data analysis is improved.

In an embodiment of the present invention, the first ranging unit includes a wireless ranging sensor 3 and a wireless tag 10, one of the wireless ranging sensor 3 and the wireless tag 10 is disposed at a position of a first point, and the other is disposed at a position of a second point, the wireless ranging sensor 3 can obtain the distance between the first point and the second point by measuring the distance to the wireless tag 10, the wireless ranging sensor 3 is electrically connected to the controller 5, and the controller 5 obtains a first measurement result according to the measurement data of the wireless ranging sensor 3.

In one embodiment of the invention, the second distance measuring unit comprises a laser sensor 4, the laser sensor 4 is arranged on the hydraulic support 2 for advancing, and the detection end of the laser sensor 4 faces the coal wall 1 of the stope face. The controller 5 obtains a second measurement result by subtracting the measurement value of the laser sensor 4 before propulsion and the measurement value of the laser sensor 4 after propulsion, so that the laser sensor 4 can be installed at any position of the hydraulic bracket 2 to meet the measurement requirement. To simplify the manufacturing and installation steps, the laser sensor 4 may be installed at the first point together with the wireless ranging sensor 3.

Optionally, the mining working face propulsive degree measuring device further includes a power circuit 7, and the power circuit 7 is electrically connected with the controller 5 and is used for supplying electric energy.

Optionally, the mining working face propulsion degree measuring device further includes a display device 9, and the display device 9 is electrically connected to the controller 5 and is used for displaying the measurement results of the first distance measuring unit and the second distance measuring unit, the single push progress and the total push progress so as to facilitate real-time observation.

The method and the device for measuring the propulsive degree of the mining working face, provided by the invention, can effectively improve the measurement accuracy, are less interfered by external factors, and have the advantages of simple structure, visual measurement result, easiness in use and operation and the like.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.