阅读说明：本技术 一种煤矿井下微震监测系统的布设方法 (Method for laying coal mine underground micro-seismic monitoring system ) 是由 余国锋 李连崇 雷成祥 牟文强 韩云春 郑群 罗勇 任波 王四戌 郭庭廷 段昌瑞 于 2020-07-27 设计创作，主要内容包括：本发明公开了一种煤矿井下微震监测系统的布设方法,包括根据采场工作面生产地质条件,设计采场岩层检测点n个,数据采集盒安装点2个；自巷道里段开始在所确定的采场监测点安装n个传感器并由里至外编号,数据采集盒首次连接的传感器分别为xm、ym；并在上位机输入对应通道已连接的传感器坐标,随着工作面的推进,更新传感器,并将新的传感器坐标录入系统,依次类推。本发明针对微震监测系统布设做出优化改进,摆脱以往对大批量设备的依赖性,提出了一种煤矿井下微震监测系统的布设方法,可以满足在长距离采场内保证监测高精度的定位效果下实现对设备的循环重复利用,以达到资源的应用最大化,同时满足矿井机械化、高效率的要求。(The invention discloses a method for arranging a coal mine underground micro-seismic monitoring system, which comprises the following steps of designing n detection points of a stope rock stratum and 2 mounting points of a data acquisition box according to geological conditions produced by a stope working face; installing n sensors at the determined stope monitoring points from the inner section of the roadway and numbering from inside to outside, wherein the sensors connected with the data acquisition box for the first time are xm and ym respectively; and inputting the coordinates of the sensors connected with the corresponding channels into the upper computer, updating the sensors along with the advance of the working surface, recording the new coordinates of the sensors into the system, and so on. The invention optimizes and improves the layout of the microseismic monitoring system, gets rid of the dependence on large-scale equipment in the past, provides the layout method of the underground microseismic monitoring system of the coal mine, can meet the requirement of realizing the recycling of the equipment under the positioning effect of ensuring high monitoring precision in a long-distance stope, achieves the maximum application of resources and simultaneously meets the requirements of mechanization and high efficiency of the mine.)

1. A method for arranging a coal mine underground micro-seismic monitoring system is characterized by comprising the following steps: the method comprises the following steps:

s01, according to the production geological conditions of a stope working face (10'), the arrangement condition of the roadways (10), two roadways (10) installed by a microseismic monitoring system are determined, n stope rock stratum detection points are designed, and 2 data acquisition box (5) installation points are designed;

s02, installing n sensors (9) at the determined stope monitoring points from the inner section of the roadway (10), wherein the sensors (9) in the two roadways (10) are numbered from inside to outside as (x1, x2, xm, …, xn-1, xn), (y1, y2, ym, …, yn-1, yn), cables are laid from the sensors (9) to the outer section of the roadway (10) and connected to each sensor (9), distance marking sensor (9) numbers are set at intervals for each cable, and meanwhile, 2 data acquisition boxes (5) are laid at the determined installation points;

s03, cutting off the cable at the installation point of the data acquisition box (5) according to the serial number from small to large, connecting the cut-off cable with the channel of the data acquisition box (5), and respectively setting the connectable sensors (9) as xm and ym if the data acquisition box (5) has m channels;

s04, communicating the data acquisition box (5) with an upper computer after connecting the sensors (9) to form a complete microseismic monitoring system, inputting coordinates of the sensors (9) connected with corresponding channels into the upper computer, wherein the detection area of the microseismic monitoring system is (x1-xm, y 1-ym);

s05, after the stope working face (10') is pushed to a set rock stratum collapse step distance which is multiplied by the current sensors (9) xi and yi, the current sensors (9) xi and yi and the data acquisition box (5) are respectively cut off to be communicated, then channels vacated by the data acquisition box (5) are connected with the sensors (9) (xm +1) and (ym +1), and the coordinates of the sensors (9) in the microseismic detection system are updated;

s06, repeating the step S05 until the monitoring system layout (x1-xn, y1-yn) of the whole working face (10') area is completed.

2. The method for arranging the coal mine underground microseismic monitoring system according to claim 1, which is characterized in that: in the step S05, the data acquisition box (5) is moved to the next installation point by adopting a downhole moving device.

3. The method for arranging the coal mine underground microseismic monitoring system according to claim 1, which is characterized in that: in step S05, the number of times of the formation collapse step is set to 3 times.

4. The method for arranging the coal mine underground microseismic monitoring system according to claim 2, which is characterized in that: the underground moving device comprises a bearing plate (3), a first vertical frame (1) and a second vertical frame (2); the bottom end of the first vertical frame (1) is fixed on one side of the bearing plate (3), the bottom end of the second vertical frame (2) is rotatably fixed on the other side of the bearing plate (3), and the second vertical frame (2) is fixed with the first vertical frame (1) through a connecting piece (22); the bottom of the bearing plate (3) is provided with a roller group.

5. The method for arranging the coal mine underground microseismic monitoring system according to claim 4, which is characterized in that: the first vertical frame (1) and the second frame are both straight rigid frames, the bottom of the first frame is welded and fixed with the bearing plate (3), and the bottom of the second frame is rotationally fixed with the bearing plate (3) through a rotating shaft (21).

6. The method for arranging the coal mine underground microseismic monitoring system according to claim 5, which is characterized in that: the second frame body is of a mesh-shaped structure and comprises two vertical rods, at least one rigid cross rod (24) and a plurality of flexible transverse binding belts (23), and two ends of the rigid cross rod (24) and the flexible transverse binding belts (23) are respectively fixed with the two vertical rods; the rigid cross bar (24) is positioned above the plurality of transverse restraining strips (23).

7. The method for arranging the coal mine underground microseismic monitoring system according to any one of claims 4 to 6, which is characterized in that: connecting pieces (22) are further fixed on the two horizontal sides of the second frame body, and fixing pieces matched with the connecting pieces (22) are fixed on the two corresponding sides of the first frame body; the second frame body is fixed with the first frame body into a whole through the matching of the connecting piece (22) and the fixing piece.

8. The method for arranging the coal mine underground microseismic monitoring system according to claim 7, which is characterized in that: the connecting piece (22) is a flexible elastic lace, and a hook is fixed at the end part of the lace; the fixing piece is a hook ring matched with the hook.

9. The method for arranging the coal mine underground microseismic monitoring system according to any one of claims 4 to 6, which is characterized in that: the roller group comprises a first roller (6) and a second roller (7), the number of the first rollers (6) is two, the first rollers are forward one-way wheels, and the two first rollers are respectively fixed at the bottom of the bearing plate (3) and are positioned below the first frame body; the second rollers (7) are two days, are backward one-way wheels, are respectively fixed at the bottom of the bearing plate (3) and are positioned below the second frame body.

10. The method for arranging the coal mine underground microseismic monitoring system according to any one of claims 4 to 6, which is characterized in that: a lifting support (8) is also fixed on the bearing plate (3); the lifting supports (8) are distributed on the bearing plate (3) and used for lifting the whole underground moving device.

Technical Field

The invention relates to the technical field of rock mass monitoring in the mine production process, in particular to a method for arranging a coal mine underground micro-seismic monitoring system.

Background

The microseism monitoring technology is widely applied to safety monitoring of mining engineering, tunnel engineering, slope engineering, hydropower station engineering and the like as a monitoring technology for identifying rock mass fracture and instability. Microseism monitoring is a means for monitoring a fracture signal of rock in the construction process based on a table network constructed by a sensor, a cable, a data acquisition box, a time source timer and a data receiving terminal, and realizing positioning, acquiring seismic source parameters and analyzing rock fracture by relying on data processing software. If the accurate positioning of the micro-seismic system is realized, more than 4 sensors are required to be arranged in a monitoring area to receive signals according to the seismic source positioning principle, and the spacing distance of each sensor cannot be too large.

The method for arranging the microseismic monitoring sensors in the inclined stratum tunnel engineering is disclosed as 2020101495420, and the method comprises the steps of firstly determining the main incident direction of P waves of microseismic events in a monitoring area; and then establishing a regional construction coordinate system and an inclined layered stratum model according with the geological characteristics of the monitored region. Influence of interference waves such as reflected waves and refracted waves is ignored, and a ray path equation of the P wave is further established; then, sequentially substituting the ray parameters, the stratum parameters, the wave velocity parameters and the like into a ray equation to obtain the optimal position of the sensor arrangement in the inclined stratum medium; and finally, sequentially solving the positions of the sensors corresponding to other main incident directions of the P waves of all the seismic sources in the monitoring area, namely the optimal layout position of the sensors in the three-dimensional monitoring area. The method is simple in calculation and accurate in result. This method does not disclose how the quantitative ratio of sensors to cartridges has been reused.

In the case of a working face of an underground coal mine stope, a plurality of sensors need to be arranged and need to be staggered in a certain space, so that the sensors are generally required to be arranged in two lanes which are arranged in parallel and have a height difference on the working face, and more sensors are required particularly in the direction of mining propulsion. The sensors are arranged in the same roadway at intervals of 100m, so that 20 × 2 to 40 sensors need to be arranged on a 2000m long working face, at least 40 data channels need to be provided for data signal transmission, and 1 data acquisition box usually has only 6 channels, so that 7 data acquisition boxes are needed. However, the cost of the data acquisition box is high, generally one data acquisition box is hundreds of thousands, the cost of the data acquisition box can reach millions, and the application of the microseismic system in a mine is severely limited, so that the mine loses an effective means for safety monitoring.

Because the cost of the data acquisition box is high, generally one data acquisition box is hundreds of thousands, the cost of the data acquisition box can reach millions, and the application of a microseismic system in a mine is severely limited, so that the mine loses an effective means for safety monitoring.

Disclosure of Invention

The invention aims to solve the technical problems of large using amount of the acquisition box and high cost in the underground micro-seismic monitoring system in the prior art.

The invention solves the technical problems through the following technical means:

a method for arranging a coal mine underground micro-seismic monitoring system comprises the following steps:

s01, determining two roadways (10) installed by a microseismic monitoring system according to the production geological conditions of a stope working face (10') and the arrangement condition of the roadways (10), designing n stope rock stratum detection points and 2 installation points of a data acquisition box (5);

s02, installing n sensors 9 at the determined stope monitoring points from the inner section of the roadway (10), wherein the sensors (9) in the two roadways (10) are numbered from inside to outside as (x1, x2, xm, …, xn-1, xn), (y1, y2, ym, …, yn-1, yn), cables are laid from the sensors (9) to the outer section of the roadway (10) and connected to each sensor (9), distance marking sensor (9) numbers are set at intervals for each cable, and meanwhile, 2 data acquisition boxes (5) are laid at the determined installation points;

s03, cutting off the cable at the installation point of the data acquisition box (5) according to the number from small to large, connecting the cut-off cable with the channel of the data acquisition box (5), and respectively setting the connectable sensors (9) as (xm) (ym) if the data acquisition box (5) has m channels;

s04, communicating the data acquisition box (5) with an upper computer after connecting the sensors (9) to form a complete microseismic monitoring system, inputting coordinates of the sensors (9) connected with corresponding channels into the upper computer, wherein the detection area of the microseismic monitoring system is (x1-xm, y 1-ym);

s05, after the stope working face (10') is pushed to a set rock stratum collapse step distance which is multiplied by the current sensors (9) xi and yi, the current sensors (9) xi and yi and the data acquisition box (5) are respectively cut off to be communicated, then channels vacated by the data acquisition box (5) are connected with the sensors (9) (xm +1) and (ym +1), and the coordinates of the sensors (9) in the microseismic detection system are updated;

s06, repeating the step S05 until the monitoring system layout (x1-xn, y1-yn) of the whole working face (10') area is completed.

Further, in the step S05, the data collection box (5) is moved to the next installation point by using the downhole moving device.

Further, in step S05, the number of times of the formation collapse step is set to 3 times.

Further, the underground moving device comprises a bearing plate, a first vertical frame (1) and a second vertical frame (2); the bottom end of the first vertical frame (1) is fixed on one side of the bearing plate, the bottom end of the second vertical frame (2) is rotatably fixed on the other side of the bearing plate, and the second vertical frame (2) is fixed with the first vertical frame (1) through a connecting piece (22); the bottom of the bearing plate is provided with a roller group.

Furthermore, the first vertical frame (1) and the second frame are both in a shape like a Chinese character 'mu', the bottom of the first frame is welded and fixed with the bearing plate, and the bottom of the second frame is rotationally fixed with the bearing plate through a rotating shaft (21).

Furthermore, the second frame body structure in a shape like a Chinese character 'mu' comprises two vertical rods, at least one rigid cross rod (24) and a plurality of flexible transverse binding belts (23), wherein two ends of the rigid cross rod (24) and the flexible transverse binding belts (23) are respectively fixed with the two vertical rods; the rigid cross bar (24) is positioned above the plurality of transverse restraining strips (23).

Furthermore, connecting pieces (22) are fixed on two horizontal sides of the second frame body, and fixing pieces matched with the connecting pieces (22) are fixed on two corresponding sides of the first frame body; the second frame body is fixed with the first frame body into a whole through the matching of the connecting piece (22) and the fixing piece.

Furthermore, the connecting piece (22) is a flexible elastic lace, and a hook is fixed at the end part of the lace; the fixing piece is a hook ring matched with the hook.

Furthermore, the roller group comprises a first roller (6) and a second roller (7), the number of the first rollers (6) is two, the first rollers are advancing one-way wheels, and the two first rollers are respectively fixed at the bottom of the bearing plate and are positioned below the first frame body; the second rollers (7) are two days, are backward one-way wheels, are respectively fixed at the bottom of the bearing plate and are positioned below the second frame body.

Furthermore, a lifting support (8) is fixed on the bearing plate; the lifting supports (8) are distributed on the bearing plate and used for lifting the whole underground moving device.

Furthermore, the lifting support (8) comprises a screw rod (81), a gasket (82) and a nut; the bearing plate is provided with a screw hole, a screw rod (81) vertically penetrates through the screw hole, the bottom of the screw rod is fixed with a gasket (82), the top of the screw rod is matched with a nut, and the gasket (82) is lifted by screwing the nut.

Furthermore, the second stand (2) is connected with the bearing plate through an elastic piece (25).

The invention has the advantages that:

the invention aims at optimizing and improving the layout of a microseismic monitoring system, gets rid of the dependence on large-scale equipment in the past, provides a layout method of the underground microseismic monitoring system of a coal mine, and aims to provide a monitoring method which can meet the requirement of realizing the recycling of equipment under the positioning effect of ensuring high monitoring precision in a long-distance stope so as to achieve the application maximization of resources and meet the requirements of mechanization and high efficiency of a mine;

in the distribution process based on the micro-seismic system, the micro-seismic monitoring data acquisition box can be efficiently moved and fixed, so that the engineering efficiency can be improved, the working procedures can be reduced, the labor intensity can be reduced, and the normal operation of the micro-seismic monitoring system in the mobile cyclic application can be ensured; particularly, the rotatable second vertical frame is adopted, so that the collection box can be conveniently placed and unloaded, and the operation space is large; in addition, the transverse binding belt of the second vertical frame can further bind the collecting box, so that the shaking in the transportation process is avoided.

The second vertical frame and the first vertical frame can be fixed at a proper distance according to the space required by the equipment by using the tying belt;

two sets of one-way wheels are adopted, so that the condition that the transportation device slips and topples over due to the height difference of the roadway and the equipment is damaged is avoided.

Drawings

FIG. 1 is a flow chart of the method for laying the coal mine underground micro-seismic monitoring system of the invention;

FIG. 2 is a field initial schematic diagram of a layout method of a coal mine underground micro-seismic monitoring system according to the invention;

FIG. 3 is a schematic diagram of a field first replacement sensor of the arrangement method of the coal mine underground micro-seismic monitoring system;

FIG. 4 is a schematic diagram of a second sensor replacement on site of the method for laying the coal mine underground microseismic monitoring system of the present invention;

FIG. 5 is a schematic diagram of a sixth replacement sensor and a mobile data acquisition box on site of the arrangement method of the coal mine underground microseismic monitoring system of the invention;

FIG. 6 is a schematic view of the complete on-site monitoring of the method for laying the coal mine underground micro-seismic monitoring system of the invention;

FIG. 7 is a schematic view of the overall structure of a mobile device for moving a data acquisition box underground according to the arrangement method of the coal mine underground microseismic monitoring system;

FIG. 8 is a schematic diagram of a lifting bracket of the mobile device;

FIG. 9 is a schematic view of a connection structure of the elastic member between the second stand and the supporting plate in the mobile device.

1. A first stand; 2. a second stand; 21. a rotating shaft; 22. a connecting member; 23. a transverse binding band; 24. a rigid cross bar; 25. an elastic member; 3. a bearing plate, 4 and a handle; 5. a collection box; 5', a cable; 6. a first roller; 7. a second roller; 8. a lifting support; 81. a screw; 82. a gasket; 10. a roadway; 9. sensor, 10', stope face; 20. a working face advancing line;

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the embodiment provides a method for laying a coal mine underground microseismic monitoring system, which includes the following steps:

step 1, according to the production geological conditions of a stope working face and the arrangement condition of roadways 10, determining two roadways 10 installed by a microseismic monitoring system, and designing n detection points of a stope rock stratum and 2 installation points of a data acquisition box 5;

step 2, installing n sensors 9 at the determined stope monitoring points from the inner section of the roadway 10, numbering the sensors 9 in the two roadways 10 from inside to outside as (x1, x2, xm, …, xn-1, xn), (y1, y2, ym, …, yn-1, yn), laying cables from the sensors 9 to the outer section of the roadway 10 and connecting the cables to each sensor 9, setting distance marking sensor 9 numbers for each cable at intervals, and meanwhile, arranging 2 data acquisition boxes 5 at the established installation points; in this embodiment, the cable marker sensors 9 are generally numbered at 50m intervals, so that firstly, faults are checked, and which line has a problem is distinguished, and secondly, the position of the collection box 5 is conveniently adjusted randomly due to adaptation to the underground mining environment.

Step 3, at the installation point of the data acquisition box 5, cutting off the cables according to the serial numbers from small to large, connecting the cut cables with the channels of the data acquisition box 5, and assuming that the data acquisition box 5 has m channels, respectively setting the connectable sensors 9 as (xm) (ym);

step 4, after the sensor 9 is connected, the data acquisition box 5 is communicated with an upper computer to form a complete microseismic monitoring system, and the coordinate of the sensor 9 connected with the corresponding channel is input into the upper computer, wherein the detection area of the microseismic monitoring system is (x1-xm, y 1-ym);

step 5, after the stope working face 10' is pushed to the stratum collapse step distance which is 3 times that of the current sensors 9xi and yi, the current sensors 9xi and yi are respectively cut off from communication with the data acquisition box 5, then a channel vacated by the data acquisition box 5 is connected with the sensors 9(xm +1) and (ym +1), and the coordinates of the sensors 9 in the microseismic detection system are updated; after the normal condition collapse step is passed, the rock stratum is considered to collapse, the goaf is in a relatively stable state, but the goaf is moved after being prolonged to 3 times in consideration of safety, so that the safety of the goaf at the rear section of the abandoned sensor 9 can be ensured;

and 6, repeating the step 5 until the monitoring system layout (x1-xn, y1-yn) of the whole working face 10' area is completed.

In step 5 of this embodiment, the data collection box 5 is moved to the next installation point by using the downhole moving device.

The working principle is as follows:

in the specific implementation process, as shown in fig. 2, taking 20 sensors 9 arranged in each lane 10 as an example, the data acquisition box 5 has 6 channels, and then the data acquisition box 5 is arranged at the position of the 7 th sensor 9, and then the 1-6 sensors 9 are connected with the 6 channels of the data acquisition box 5. As shown in fig. 3, with the advance of the mining surface (the working surface advancing line 20 shown in the figure), when the monitoring area of the 1 st sensor 9 is in a safe state, the connection between the 1 st sensor 9 and the data acquisition box 5 is cut off, the 7 th sensor 9 is connected with the data acquisition box 5, and so on, as shown in fig. 5, until the monitoring ranges of the 1-6 sensors 9 are in a safe state, the data acquisition box 5 is moved to the attachment of the 13 th sensor 9, and so on, until finally, as shown in fig. 6.

As shown in fig. 7, in the present embodiment, the downhole moving device used for moving the data collecting box 5 includes a bearing plate, a first stand 1, and a second stand 2; the bottom end of the first vertical frame 1 is fixed on one side of the bearing plate, the bottom end of the second vertical frame 2 is rotationally fixed on the other side of the bearing plate, and the second vertical frame 2 is fixed with the first vertical frame 1 through a connecting piece 22; the bottom of the bearing plate is provided with a roller group.

In this embodiment, first grudging post 1 and second support body are the mesh font rigidity support body that adopts the shaped steel welding to form, and loading board 3 adopts the steel sheet that 5mm is thick, and loading board 3 of this embodiment is the rectangle structure. The bottom of the first frame body is welded and fixed with the bearing plate 3, and the bottom of the second frame body is rotationally fixed with the bearing plate 3 through a rotating shaft 21 and is parallel to the first frame body. The mounting structure of second support body specifically does, at the opposite side of loading board 3, welds two ear seats, sets up porosely on the ear seat, and the both ends of pivot 21 are rotated and are fixed in the downthehole of ear seat, and the bottom welding of second grudging post 2 has the lantern ring, and the lantern ring rotates the cover and establishes in pivot 21.

In this embodiment, in order to prevent the collecting box 5 from shaking during transportation, the second frame body grid-shaped structure may include two vertical rods, at least one rigid cross rod 24 and a plurality of flexible transverse binding bands 23, the plurality of transverse binding bands 23 are located at the lower portion of the second vertical frame 2, and the rigid cross rod 24 is used to stabilize the distance between the two vertical rods. The flexible transverse restraining strip 23 may be an elastic strip so as to achieve a restraining effect on the collecting box 5.

In this embodiment, in order to stabilize the structure of the second frame body in the use state, the connecting members 22 are further fixed on two horizontal sides of the second frame body, and the fixing members matched with the connecting members 22 are fixed on two corresponding sides of the first frame body; the second frame body is fixed with the first frame body into a whole through the matching of the connecting piece 22 and the fixing piece.

In this embodiment, the connecting member 22 is a flexible elastic strap or chain, and a hook is fixed to the end of the strap; the fixing piece is a hook ring matched with the hook. The length of frenulum and chain satisfies the requirement of placing of gathering box 5 can.

Due to the fact that the underground bottom surface is uneven, the weight of the collecting box 5 is large, and accidents such as equipment toppling and damage or personnel injury can be caused if the collecting box slips down a slope in the manual transportation process. Therefore, in this embodiment, the roller set includes two first rollers 6 and two second rollers 7, and the two first rollers 6 are forward unidirectional wheels, and are respectively fixed at the bottom of the bearing plate 3 and located below the first frame body; the second rollers 7 are two days and are backward one-way wheels, and are respectively fixed at the bottom of the bearing plate 3 and positioned below the second frame body. In the transportation process, the first roller 6 is grounded, the second roller 7 is suspended, or the second roller 7 is grounded, and the first roller 6 is suspended.

As shown in fig. 7 and 8, after the transportation is carried to a destination, the equipment is prone to topple over or damage due to uneven ground and uneven supporting force of 4 rollers. Therefore, in this embodiment, the lifting bracket 8 is further fixed on the bearing plate 3; the lifting brackets 8 are distributed on the bearing plate 3 and used for lifting the whole underground moving device. The lifting bracket 8 comprises a screw 81 and a gasket 82; the screw hole is formed in the bearing plate 3, the screw 81 vertically penetrates through the screw hole to be in threaded fit with the screw hole, the bottom of the screw 81 is fixed with the gasket 82, and the screw 81 is screwed through a wrench to lift the gasket 82. The lifting support 8 is 4, and the equipartition is on loading board 3.

As shown in fig. 9, in this embodiment, when unloading the collecting box 5, the second vertical frame 2 needs to be separated from the first vertical frame 1, and in order to avoid the second vertical frame 2 hitting the ground, an elastic member 25, such as a spring, an elastic belt, etc., is further disposed between the second vertical frame 2 and the bearing plate 3. The elastic members 25 may be two and are disposed on two sides of the second vertical frame 2, one end of the elastic member 25 is fixed to the side column of the second vertical frame 2, and the other end of the elastic member is fixed to the upper surface of the bearing plate 3.

In this embodiment, in order to facilitate dragging the moving device, handles 4 are fixed to both sides of the first vertical frame 1 and the second vertical frame 2, so as to facilitate force application.

The method of the movable frame in use comprises the following steps:

step 1, after the mobile device is carried to the accessory of the data acquisition box 5, the connecting piece 22 is opened, and the second vertical frame 2 is turned outwards;

step 2, placing the data acquisition box 5 on the bearing plate 3, ensuring the front surface of the data acquisition box 5 to be consistent with the front surface of the mobile device, erecting the second vertical frame 2, and fixing the second vertical frame with the first connecting piece 22 through the connecting piece 22 so as to fix the data acquisition box 5;

step 3, after the collecting box 5 is arranged, the whole device is obliquely placed to be deviated to the direction of the first vertical frame 1, the first idler wheel 6 is grounded, the second idler wheel 7 is suspended, the handle 4 is held, and the whole device is dragged to move forwards;

and 4, after the mobile terminal moves to the designated position, rotating the screw 81 to enable the 4 gaskets 82 to adapt to different heights of the current bottom surface, suspending the 4 rollers, then opening the connecting piece 22, and detaching the data acquisition box 5 to be arranged at the designated position.

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.