Intelligent testing system and testing method for fissure development in coal mine goaf

Abstract

The present application belongs to the technical field of coal mine goaf fissure development detection, and relates to a coal mine goaf fissure development intelligent testing system and a testing method. The testing system comprises a water seepage device, an intelligent timing system and a water passing device. The water seepage device comprises a water seepage pipe and a water injection capsule for expanding and sealing a hole. The intelligent timing system comprises an acoustic controller and a single-chip microcomputer. The water passing device comprises an intelligent water passing instrument for water injection and water discharge. The intelligent water passing instrument comprises a switching valve for switching water injection and water discharge actions and a motor for driving the switching valve to rotate. The testing method is to connect the above testing system to a drill hole at the end of a coal mine goaf fissure, and then perform water injection, alarm time recording, data arrangement and analysis, etc. The present application can represent the development degree of the coal mine goaf fissure by measuring the seepage time with a fixed water amount, save water resources, improve detection efficiency, and has important significance for mine exploitation design, gas extraction, water disaster prevention and control, roof management and safe and efficient production of coal mines.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine goaf fissure development detection, and particularly relates to a coal mine goaf fissure development intelligent testing system and a testing method. BACKGROUND

[0002] With the development of intelligent technology, intelligent devices are increasingly common in various industries. Coal mines are also moving towards intelligent unmanned direction. The intelligent technology not only improves the safety of coal mines, but also greatly improves the resource recovery rate.

[0003] In the process of coal mining, many problems may occur in coal mines, and how to accurately determine the fissure development degree of the coal mine goaf is a common mining problem. After the coal seam is mined, a goaf is formed. The overburden strata of the goaf will be damaged, deformed and moved, and then the overburden strata with different fissure development degrees are divided into three different characteristic zones: caving zone, water flowing fractured zone and bending subsidence zone, collectively referred to as "three zones". Among them, the caving zone and the fissure zone of the goaf are the main places for gas and water flow, and are the accumulation places of gas and water. These characteristics affect the determination of the arrangement horizon of the roof high drainage roadway and the final hole horizon of the high drainage borehole.

[0004] Therefore, determining the fissure development degree of the coal mine goaf is of great significance for the mine exploitation design, gas drainage, water disaster prevention and control, roof management and safe and efficient production of coal mines, and for determining the upper limit of the coal mining face, the final hole position of the high gas drainage borehole and the ground movement. However, the existing device and method for testing the fissure development of the coal mine goaf according to the size of the water seepage amount have the problems of large water consumption, low work efficiency and inconvenient operation, and therefore need to be improved. SUMMARY

[0005] The purpose of the present application is to provide an intelligent testing system and a testing method for measuring the fissure development degree of a coal mine goaf, so as to simply and quickly measure the fissure development degree of the goaf.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present application, the coal mine goaf fissure development intelligent testing system comprises the following technical solutions:

[0007] The coal mine goaf fissure development intelligent testing system comprises a water supply device, a water seepage device and an intelligent timing system. The water seepage device is used to probe into the borehole and make water seep into the goaf coal rock stratum. The intelligent timing system is used to measure the time taken by a certain amount of water to seep into the goaf coal rock stratum. The water supply device is used to complete water injection and water discharge in conjunction with the water seepage device.

[0008] The water infiltration device comprises a water infiltration pipe and a water injection capsule used to inflate a hole sealing part, the water injection capsule is wrapped outside the water infiltration pipe to form an independent closed space, one end of the water infiltration pipe is connected with a hollow drill rod, the other end penetrates through the water injection capsule and extends into the borehole, the water injection capsule is provided with a first water injection port near the end of the hollow drill rod, the water infiltration pipe is provided with a water injection sleeve, a jacket is arranged between the outer wall of the water injection sleeve and the inner wall of the water infiltration pipe, a sound transmission device is arranged in the jacket, the water injection sleeve is provided with a second water injection port near the end of the hollow drill rod and a permeation pipe used to make water infiltrate into the borehole and a communication port used to determine the water injection amount away from the end of the hollow drill rod, the water outlet of the permeation pipe is arranged between the communication port and the sound transmission device and extends to the outside of the water infiltration pipe, the connection part of the water infiltration pipe and the permeation pipe is sealed, and the sound transmission device emits a sound signal when water overflows through the communication port or the water level in the borehole is lower than the water outlet of the permeation pipe by a certain height.

[0009] The intelligent timing system comprises a sound control instrument and a single-chip microcomputer, the sound control instrument is used to receive the sound signal generated by the sound transmission device, the single-chip microcomputer is used to record the interval time of the sound signal generated by the sound transmission device and control the water injection and drainage actions of the water passing device, the interval time recorded by the single-chip microcomputer can be directly read through the display screen of the single-chip microcomputer, and the sound control instrument is installed at the entrance of the borehole and is electrically connected with the single-chip microcomputer.

[0010] The water passing device comprises an intelligent water passing instrument used to inject and drain water, the intelligent water passing instrument comprises a conversion valve used to switch the water injection and drainage actions and a motor used to drive the conversion valve to rotate, and the motor is electrically connected with the single-chip microcomputer.

[0011] Preferably, the sound transmission device comprises a percussion sound transmission device, a D-type sound transmission device and an electricity storage box.

[0012] The shock sound transmission device comprises an electronic alarm and a transmission ball, the electronic alarm is fixed on the inner wall of the water seepage pipe, and a ball pit matched with the transmission ball is arranged on the upper end of the shell of the electronic alarm, a through hole is arranged at the bottom of the ball pit, and the touch button of the electronic alarm penetrates to above the through hole, the transmission ball falls into the ball pit to press the touch button of the electronic alarm, and the alarm can be sent, the electronic alarm can set the alarm time according to the requirement, a water container is arranged outside the water seepage pipe, a water leakage hole is arranged at the bottom of the water container, the water leakage amount of the water leakage hole is less than the water amount of the water seepage pipe flowing into the water container in the same time, the water container is arranged below the water outlet of the water seepage pipe and is fixedly connected with the transmission ball through a connecting rod, a flow guide plate is arranged between the water container and the water outlet of the water seepage pipe, the flow guide plate is connected to the outer wall of the water seepage pipe, a swing hole is arranged on the wall of the water seepage pipe and can swing up and down, a rubber sealing cover is arranged outside the swing hole, the rubber sealing cover is sealingly connected with the connecting rod, and the connecting rod is rotatably connected in the swing hole through a pin shaft; when the water container contains water, the transmission ball is lifted to be separated from the touch button of the electronic alarm, when the water in the water container flows out, the transmission ball falls to hit the touch button of the electronic alarm and causes the electronic alarm to send an alarm;

[0013] The type D sound transmission device comprises an electronic alarm II, a rubber belt and a type D transmission disc; the type D transmission disc comprises a cylindrical stem and a water receiving disc, the water receiving disc is in the shape of a circular arc box, and a drain hole is arranged at the bottom of the water receiving disc, the drain capacity of the drain hole is less than the water inflow into the water receiving disc through the communication port at the same time; the top of the cylindrical stem is connected to the center of the bottom of the water receiving disc, and the bottom of the cylindrical stem is in the shape of a hemisphere; the two ends of the rubber belt are connected between the inner wall of the water seepage pipe and the outer wall of the water injection sleeve, and the connecting end of the rubber belt and the water injection sleeve is provided with a water outlet channel, the bottom of the water outlet channel is connected with the hollow drill rod, the cylindrical stem of the type D transmission disc passes through the rubber belt and is fixedly connected with the rubber belt, the electronic alarm II is the same in structure as the electronic alarm I and is fixed on the outer wall of the water injection sleeve, the ball pit left on the upper end of the shell of the electronic alarm II is matched with the bottom of the cylindrical stem, the connecting end of the rubber belt and the water injection sleeve is higher than the connecting end of the rubber belt and the water seepage pipe, two baffles are arranged on the two sides of the rubber belt in correspondence, the two baffles are connected to the outer side wall of the water injection sleeve, and the baffles, the outer wall of the water injection sleeve and the inner wall of the water seepage pipe cooperate to make the water flowing out of the communication port fall into the water receiving disc or directly enter the water outlet channel, guide plates are arranged on the two sides of the cylindrical stem of the type D transmission disc in correspondence, the two guide plates are arranged above the rubber belt and are slidably connected with the outer wall of the water injection sleeve and the inner wall of the water seepage pipe respectively, so that the type D transmission disc can only move up and down, when a certain amount of water falls into the type D transmission disc, the bottom of the cylindrical stem will fall and hit the touch button of the electronic alarm II, and the electronic alarm II will alarm, after the communication port stops discharging water, the water in the water receiving disc will slowly flow out from the drain hole to the rubber belt and the water outlet channel and then be discharged through the hollow drill rod, and when the water flow in the water receiving disc is exhausted, the type D transmission disc is driven back to the initial position under the elastic force of the rubber belt.

[0014] The power storage box is arranged in the water seepage pipe and is mounted at the connecting end of the water seepage pipe and the hollow drill rod, the power storage box takes the detachable No. 1 battery as a power supply to supply power to the electronic alarm I and the electronic alarm II.

[0015] Preferably, the intelligent water-passing instrument further comprises a shell, the switching valve is arranged in the shell, the shell is provided with a first external water supply port, a second external water supply port, an external water inlet and an external water outlet, the first external water supply port is provided with a first water stop valve and a first pressure gauge, and the first external water supply port is connected with the first water injection port through a first high-pressure water pipe, the second external water supply port is provided with a second water stop valve and a second pressure gauge, and the second external water supply port is connected with the second water injection port through a second high-pressure water pipe, the switching valve is in transmission connection with a motor arranged in the shell, the external water inlet is used for connecting a water injection pump or a manual pressure pump, and the first external water supply port, the second external water supply port, the external water inlet and the external water outlet are all connected with the switching valve, and the first external water supply port or the second external water supply port can be respectively connected with the external water inlet and the external water outlet through the switching valve.

[0016] Preferably, the switching valve comprises a valve body, a rotating disc, a sealing ring, a rotating shaft and a manual wheel disc, the valve body is provided with an internal water supply port, an internal water inlet and an internal water outlet, the internal water supply port is connected with the first external water supply port and the second external water supply port through a tee joint, the internal water inlet is connected with the external water inlet, the internal water outlet is connected with the external water outlet, the rotating disc and the sealing ring are integrated and sealingly connected in the valve body, one end of the rotating shaft is fixed at the center of the rotating disc, the other end of the rotating shaft is sealingly penetrated to the outside of the valve body and is in transmission connection with the motor through a gear transmission structure, and the motor is controlled by the single-chip microcomputer to make the rotating disc rotate by an angle of 60 degrees once.

[0017] According to another aspect of the present application, a coal mine goaf fissure development testing method is provided based on the above-mentioned coal mine goaf fissure development intelligent testing system, and the method comprises the following steps:

[0018] S1, after the water permeation pipe is inserted into the drill hole upward, the intelligent water-passing instrument is started, the second water stop valve is closed, and the first water stop valve is opened, water is passed to the water injection capsule through the first water injection port, so that the water injection capsule is inflated to block the lower end of the drill hole, when the reading of the first pressure gauge reaches 4 MPa, the first water stop valve is closed;

[0019] S2, the second water stop valve is opened, water is passed to the water injection sleeve through the second water injection port, and the water flows out from the water outlet of the water permeation pipe; if the electronic alarm No. 2 does not give an alarm for more than half an hour, it is proved that the fissure development of this section in the drill hole is too high, there is a large fissure, and this section is skipped, the water permeation pipe is pushed upward through the hollow drill rod, and the drill hole section at the next height is measured;

[0020] S3, until starting the following workflow: water flows out from the communication port and falls into the D-shaped transmission disc of the D-shaped sound device, so that the D-shaped transmission disc falls and hits the triggering button of the electronic alarm two, causing the electronic alarm two to issue an alarm, at this time indicating that the water level in the borehole has overflowed the water outlet of the permeation pipe, after the sound control instrument receives the alarm issued by the electronic alarm one, the single-chip microcomputer starts timing and controls the motor to drive the conversion valve to rotate three times to close the inner water supply port and the inner water inlet port; when the water in the borehole permeates below the water tray, and after the water flow in the water tray is exhausted, the sound control instrument receives the alarm issued by the electronic alarm one, the single-chip microcomputer stops timing and controls the motor to drive the conversion valve to rotate three times to close the inner water supply port and the inner water inlet port;

[0021] S4, when n groups of data need to be measured, at least (n-1) times of circulation are performed according to the working procedure of step S3, when the electronic alarm two issues an alarm again, the single-chip microcomputer starts timing again and controls the motor to drive the conversion valve to rotate three times to close the inner water supply port and the inner water inlet port, when the electronic alarm one issues an alarm again, the single-chip microcomputer stops timing and controls the motor to drive the conversion valve to rotate five times to close the inner water inlet port and connect the inner water supply port and the inner water outlet port, so that the residual water in the water permeation pipe is exhausted through the outer water outlet, then the first water stop valve is opened, the second water stop valve is closed, the water in the water injection capsule is exhausted through the outer water outlet, and the whole test process of the borehole section is completed;

[0022] S5, the conversion valve is rotated four times by using the manual wheel to return to the starting position; according to the need, the next section of the borehole or other boreholes are detected according to the above steps S1-S4;

[0023] S6, after the test is completed, the data stored in the single-chip microcomputer are transmitted to the computer in time for arrangement, if the measured data are all large, it is proved that the fissure in the goaf is not developed or the development degree is low, the gas occurrence is small, and the gas content in the goaf is low, so that only ventilation treatment is needed; if the measured data are all small, it is proved that the fissure in the goaf is highly developed, the gas occurrence is large, and the gas content in the goaf is high, so that the method of gas extraction and other methods of gas control need to be taken.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] 1, the present application is an intelligent test system, without complex manual operation, after the equipment is installed, only the set program is run, accurate and scientific data can be measured.

[0026] 2、The present application characterizes the permeability of coal rock stratum by the fixed water quantity and the length of permeation time, compared with the previous equipment which characterizes the permeability of coal rock stratum by flow, the present application can save a large amount of water resources. The previous equipment which characterizes the permeability of coal rock stratum by flow needs to inject a large amount of water to measure the permeability of coal rock stratum, and a lot of water resources are wasted. The present application can control the water quantity to save a lot of water resources when testing, and save time and labor when measuring. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Fig. 1 is a structure schematic diagram of the intelligent testing system of coal mine goaf fissure development of the present application in the embodiment.

[0028] Figure 2 Fig. 4 is a cross-sectional structure schematic diagram of the water permeation device of the present application in the embodiment.

[0029] Figure 3 Fig. 6 is a lateral cross-sectional schematic diagram of the sound transmission device of the present application in the embodiment.

[0030] Figure 4 Fig. 7 is a longitudinal cross-sectional schematic diagram of the sound transmission device of the present application in the embodiment.

[0031] Figure 5 Fig. 8 is an enlarged schematic diagram of the cross section of the water-filled water pan in the sound transmission device of the present application in the embodiment.

[0032] Figure 6 Fig. 9 is a lateral cross-sectional schematic diagram of the D-shaped sound transmission device of the present application in the embodiment.

[0033] Figure 7 Fig. 10 is a longitudinal cross-sectional schematic diagram of the side of the D-shaped sound transmission device of the present application in the embodiment.

[0034] Figure 8 Fig. 11 is a cross-sectional structure schematic diagram of the water transmission device of the present application in the embodiment.

[0035] Figure 9 Fig. 12 is an enlarged schematic diagram of the cross section of the conversion valve of the present application in the embodiment.

[0036] Figure 10 Fig. 13 is a schematic diagram of the rotation process of the conversion valve of the present application in the embodiment.

[0037] In the diagram: 1. Water seepage device; 2. Intelligent timing system; 3. Water supply device; 4. Sound controller; 5. Mining cable; 6. Microcontroller; 7. Intelligent water supply device; 8. First high-pressure water pipe; 9. External drain outlet; 10. Hollow drill rod; 11. Display screen; 12. Manual rotary wheel; 13. First water inlet; 14. Second water inlet; 15. Water inlet capsule; 16. Water seepage pipe; 17. Vibration sound transmission device; 18. T-shaped sound transmission device; 19. Permeation pipe; 20. Connecting port; 21. Guide plate; 22. Jacket; 23. Water inlet sleeve; 24. Storage tank; 25. Vibration transmission ball; 26. Water holding tray. 27. Electronic Alarm Device 1; 28. Rubber Sealing Cover; 29. ​​Guide Plate; 30. Connecting Rod; 31. Internal Water Supply Inlet; 32. Motor; 33. Diverter Valve; 34. Turntable; 35. Shaft; 36. Sealing Ring; 37. First Pressure Gauge; 38. Second Pressure Gauge; 39. First External Water Supply Inlet; 40. External Water Inlet; 41. First Stop Valve; 42. Second Stop Valve; 43. Water Outlet Channel; 44. Leakage Hole; 45. Baffle; 46. Second External Water Supply Inlet; 47. T-Type Transmission Disc; 48. Rubber Belt; 49. Electronic Alarm Device 2; 50. Internal Drain; 51. Internal Water Inlet. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figure 1 As shown, the intelligent testing system for the development of fractures in the goaf proposed in this invention includes a water-passing device 3, a water-seeping device 1, and an intelligent timing system 2. The water-seeping device 1 is used to penetrate the borehole and allow water to seep into the coal and rock strata in the goaf. The intelligent timing system 2 is used to measure the time it takes for a certain amount of water to seep into the coal and rock strata in the goaf. The water-passing device 3 is used in conjunction with the water-seeping device 1 to complete water injection and drainage.

[0041] like Figure 2As shown in the drawings, in the embodiment, the water infiltration device 1 comprises a water infiltration pipe 16 and a water injection capsule 15 for expanding the hole, the water injection capsule 15 is wrapped outside the water infiltration pipe 16 to form an independent closed space, one end of the water infiltration pipe 16 is connected with the hollow drill rod 10, the other end penetrates through the water injection capsule 15 and extends into the borehole, the water injection capsule 15 is provided with a first water injection port 13 near the end of the hollow drill rod 10, the water infiltration pipe 16 is provided with a water injection sleeve 23, a jacket 22 is arranged between the outer wall of the water injection sleeve 23 and the inner wall of the water infiltration pipe 16, the jacket 22 is provided with a sound transmission device, the water injection sleeve 23 is provided with a second water injection port 14 near the end of the hollow drill rod 10 and a permeation pipe 19 for infiltrating water into the borehole and a communication port 20 for determining the water injection amount away from the end of the hollow drill rod 10; the water outlet of the permeation pipe 19 is arranged between the communication port 20 and the sound transmission device and extends to the outside of the water infiltration pipe 16, the connection between the water infiltration pipe 16 and the permeation pipe 19 is sealed; the sound transmission device emits a sound signal when water overflows through the communication port 20 or the water level in the borehole is lower than a certain height of the water outlet of the permeation pipe 19;

[0042] As shown in the drawings, Figure 1 the intelligent timing system 2 comprises a sound control instrument 4 and a single-chip microcomputer 6, the sound control instrument 4 and the single-chip microcomputer 6 adopt mature existing technologies in the field, which will not be described in detail here. The sound control instrument 4 is used to receive the sound signal generated by the sound transmission device, the single-chip microcomputer 6 is used to record the interval time of the sound signal generated by the sound transmission device and control the water injection and drainage actions of the water passing device 3, the interval time recorded by the single-chip microcomputer 6 can be directly read through the display screen 11 of the single-chip microcomputer 6, and the sound control instrument 4 is installed at the entrance of the borehole and is electrically connected with the single-chip microcomputer 6 through the mine cable 5.

[0043] As shown in the drawings, Figure 8 the water passing device 3 comprises an intelligent water passing instrument 7 for water injection and drainage, the intelligent water passing instrument 7 comprises a switching valve 33 for switching the water injection and drainage actions and a motor 32 for driving the switching valve 33 to rotate, and the motor 32 is electrically connected with the single-chip microcomputer 6 through the mine cable 5.

[0044] As shown in the drawings, Figures 2 to 7 in the embodiment, the sound transmission device comprises a percussion sound transmission device 17, a D-type sound transmission device 18 and an electricity storage box 24.

[0045] The shock sound transmission device 17 comprises an electronic alarm 27 and a transmission ball 25, the electronic alarm 27 is fixed on the inner wall of the water seepage pipe 16, and a ball pit matching the transmission ball 25 is arranged on the upper end of the shell of the electronic alarm 27, a through hole is arranged at the bottom of the ball pit, the trigger button of the electronic alarm 27 penetrates above the through hole, the transmission ball 25 falls into the ball pit to press the trigger button of the electronic alarm 27, and the alarm can be sent, the alarm time of the electronic alarm 27 is set to 10s, the water seepage pipe 16 is externally provided with a water tank 26, the bottom of the water tank 26 is provided with a water leakage hole 44, the water leakage amount of the water leakage hole 44 is less than the water amount of the water seepage pipe 19 flowing into the water tank 26 in the same time, the water tank 26 is arranged below the water outlet of the water seepage pipe 19 and is fixedly connected with the transmission ball 25 through a connecting rod 30, a flow guide plate 21 is arranged between the water tank 26 and the water outlet of the water seepage pipe 19, the flow guide plate 21 is connected on the outer wall of the water seepage pipe 16, and is used for making the water flowing out of the water seepage pipe 19 fall into the water tank 26 first, a swing hole is arranged on the pipe wall of the water seepage pipe 16, the swing hole is externally provided with a rubber sealing cover 28, the rubber sealing cover 28 is sealingly connected with the connecting rod 30, and the connecting rod 30 is rotatably connected in the swing hole through a pin shaft; when the water tank 26 is filled with water, the transmission ball 25 is lifted to be separated from the trigger button of the electronic alarm 27, when the water in the water tank 26 flows out, the transmission ball 25 falls to hit the trigger button of the electronic alarm 27 and causes the electronic alarm 27 to send an alarm;

[0046] The type D sound transmission device 18 includes electronic alarm two 49, rubber belt 48 and type D transmission disc 47; the type D transmission disc 47 includes cylindrical stem and water receiving disc, the water receiving disc is circular arc box, and the bottom of the water receiving disc is provided with drainage hole, the drainage capacity of the drainage hole is less than the water inflow into the water receiving disc through the communication port 20 in the same time; the top of the cylindrical stem is connected in the bottom center of the water receiving disc, and the bottom of the cylindrical stem is semispherical, the two ends of the rubber belt 48 are connected between the inner wall of the water seepage pipe 16 and the outer wall of the water injection sleeve 23, and the connecting end of the rubber belt 48 and the water injection sleeve 23 is provided with water outlet channel 43, the bottom of the water outlet channel 43 is communicated with the hollow drill rod 10, the cylindrical stem of the type D transmission disc 47 passes through the rubber belt 48 and is fixedly connected with the rubber belt 48, the electronic alarm two 49 is same as the structure of the electronic alarm one 27, and is fixed on the outer wall of the water injection sleeve 23, the ball pit left on the shell upper end of the electronic alarm two 49 matches with the bottom of the cylindrical stem, the connecting end of the rubber belt 48 and the water injection sleeve 23 is higher than the connecting end of the rubber belt 48 and the water seepage pipe 16, two baffle plates 45 are correspondingly provided on the two sides of the rubber belt 48, the two baffle plates 45 are connected on the outer side wall of the water injection sleeve 23, the baffle plate 45 cooperates with the outer wall of the water injection sleeve 23 and the inner wall of the water seepage pipe 16 to make the water flowing out of the communication port 20 only fall into the water receiving disc or directly enter the water outlet channel 43, the two sides of the cylindrical stem of the type D transmission disc 47 are correspondingly provided with guide plates 29, the two guide plates 29 are both arranged above the rubber belt 48, and are respectively slidably connected with the outer wall of the water injection sleeve 23 and the inner wall of the water seepage pipe 16, for making the type D transmission disc 47 only move up and down, when a certain amount of water falls into the type D transmission disc 47, the bottom of the cylindrical stem will fall and hit the touch button of the electronic alarm two 49, and cause the electronic alarm two 49 to send alarm, after the communication port 20 stops water flowing out, the water in the water receiving disc will slowly flow out from the drainage hole to the rubber belt 48 and the water outlet channel 43, and then be discharged through the hollow drill rod 10, when the water flow in the water receiving disc is exhausted, the type D transmission disc 47 is driven to return to the initial position under the elastic force of the rubber belt 48;

[0047] The power storage box 24 is arranged in the water seepage pipe 16, and is installed at the connecting end of the water seepage pipe 16 and the hollow drill rod 10, the power storage box 24 uses the detachable No. 1 battery as power supply to supply power for the electronic alarm one 27 and the electronic alarm two 49.

[0048] As Figures 8 to 10As shown, in the embodiment, the intelligent water instrument 7 further comprises a shell, the conversion valve 33 is arranged in the shell, the shell is provided with a first external water supply port 39, a second external water supply port 46, an external water inlet port 40 and an external water outlet port 9, the first external water supply port 39 is provided with a first water stop valve 41 and a first pressure gauge 37, and the first external water supply port 39 is connected with the first water injection port 13 through the first high-pressure water pipe 8, the second external water supply port 46 is provided with a second water stop valve 42 and a second pressure gauge 38, and the second external water supply port 46 is connected with the second water injection port 14 through the second high-pressure water pipe, the conversion valve 33 is in transmission connection with the motor 32 arranged in the shell, the external water inlet port 40 is used for connecting a water injection pump or a manual pressure pump, the first external water supply port 39, the second external water supply port 46, the external water inlet port 40 and the external water outlet port 9 are all connected with the conversion valve 33, and the first external water supply port 39 or the second external water supply port 46 and the external water inlet port 40 can be individually connected, and the first external water supply port 39 or the second external water supply port 46 and the external water outlet port 9 can be individually connected through the conversion valve 33.

[0049] As shown in the figure, Figures 8 to 10 As shown, in the embodiment, the conversion valve 33 comprises a valve body, a rotating disc 34, a sealing ring 36, a rotating shaft 35 and a manual wheel disc 12, the valve body is provided with an internal water supply port 31, an internal water inlet port 51 and an internal water outlet port 50; the internal water supply port 31 is connected with the first external water supply port 39 and the second external water supply port 46 through a three-way joint, the internal water inlet port 51 is connected with the external water inlet port 40, and the internal water outlet port 50 is connected with the external water outlet port 9, the rotating disc 34 and the sealing ring 36 are integrated and sealingly connected in the valve body, one end of the rotating shaft 35 is fixed at the center of the rotating disc 34, the other end of the rotating shaft 35 is sealingly penetrated to the outside of the valve body and is in transmission connection with the motor 32 through a gear transmission structure, the gear transmission structure comprises a driven gear arranged on the rotating shaft 35 and a driving gear arranged on the output shaft of the motor, and the driving gear and the driven gear are in meshing connection; the motor 32 makes the rotating disc 34 rotate by an angle of 60° once under the control of the single-chip microcomputer 6, and the end of the rotating shaft 35 away from the rotating disc 34 further extends to the outside of the shell and is fixedly connected with the manual wheel disc 12.

[0050] Embodiment 2

[0051] The coal mine goaf fissure development test method provided in the application, as shown in the figure, Figures 1 to 10 comprises the following steps:

[0052] S1, after the water pipe 16 is inserted into the drill hole, the intelligent water instrument 7 is started, the second water valve 42 is closed, the first water valve 41 is opened, water is injected into the water injection capsule 15 through the first water inlet 13, so that the water injection capsule 15 is expanded to block the lower end of the drill hole, when the reading of the first pressure gauge 37 reaches 4MPa, the first water valve 41 is closed; if the reading of the first pressure gauge 37 does not decrease, it indicates that the water injection capsule 15 is sealed tightly, if the reading of the first pressure gauge 37 decreases, it indicates that the water injection capsule 15 has a leakage point, which needs to be plugged in time.

[0053] S2, the second water valve 42 is opened, water is injected into the water injection sleeve 23 through the second water inlet 14, and the water flows out of the water outlet of the permeation pipe 19; if the electronic alarm 2 49 does not issue an alarm for more than half an hour, it proves that the development of the crack in the drill hole is too high, there is a large crack, then the section is skipped, the water pipe 16 is pushed upward through the hollow drill rod 10, and the drill hole section at the next height is measured;

[0054] S3, until the following working process is started: the water flows out of the communication port 20 and falls into the D-shaped transmission disc 47 of the D-shaped sound transmission device 18, so that the D-shaped transmission disc 47 falls and hits the touch button of the electronic alarm 2 49, causing the electronic alarm 2 49 to issue an alarm, at this time, it indicates that the water surface in the drill hole has overflowed the water outlet of the permeation pipe 19, after the electronic alarm 2 49 issues an alarm, the single-chip microcomputer 6 starts timing and controls the motor 32 to drive the conversion valve 33 to rotate three times, the inner water supply port 31 and the inner water inlet 51 are closed; when the water in the drill hole permeates below the water tank 26, and the water flow in the water tank 26 is exhausted, after the electronic alarm 1 27 issues an alarm, the single-chip microcomputer 6 stops timing and controls the motor 32 to drive the conversion valve 33 to rotate three times, the inner water supply port 31 and the inner water inlet 51 are connected;

[0055] S4, when 5 groups of data need to be measured, at least 4 times of the working process of step S3 are cycled, when the electronic alarm 2 49 issues an alarm again, the single-chip microcomputer 6 starts timing again and controls the motor 32 to drive the conversion valve 33 to rotate three times, the inner water supply port 31 and the inner water inlet 51 are closed, when the electronic alarm 1 27 issues an alarm again, the single-chip microcomputer 6 stops timing and controls the motor 32 to drive the conversion valve 33 to rotate five times, the inner water inlet 51 is closed, the inner water supply port 31 and the inner water outlet 50 are connected, the residual water in the water pipe 16 is drained through the outer water outlet 9, then the first water valve 41 is opened, the second water valve 42 is closed, the water in the water injection capsule 15 is drained through the outer water outlet 9, and the whole test process of the drill hole section is completed;

[0056] S5, the conversion valve 33 is rotated four times by the manual dial 12, so that the conversion valve 33 returns to the starting position; according to the needs, the next section of the drill hole or other drill holes are detected according to the above steps S1-S4;

[0057] S6, after the test, the data stored in the single-chip microcomputer 6 and timely transmission to the computer to arrange, if the measured data are all large, it proves that the goaf fissure is not developed or the development degree is low, the gas occurrence is less, the goaf gas content is low, only need to carry on the ventilation treatment; if the measured data are all small, it proves that the goaf fissure development degree is high, the gas occurrence is large, the goaf gas content is high, need to take the gas extraction and other methods of gas control.

[0058] The above examples are only used to illustrate but not to limit the technical solutions of the present application, although the present application is described in detail with reference to the above examples, those skilled in the art should understand that the present application can still be modified or equivalently replaced without departing from the spirit and scope of the present application, any modification or partial replacement should be covered in the scope of the claims of the present application.

Claims

1. A coal mine goaf fissure development intelligent testing system, comprising a water passing device, characterized in that: The water infiltration device is used for penetrating into the borehole and infiltrating water into the goaf coal rock stratum, and the water supply device is used for matching the water infiltration device to complete water injection and water discharge. The water infiltration device comprises a water infiltration pipe and a water injection capsule used for expanding a hole sealing, the water injection capsule is wrapped outside the water infiltration pipe to form an independent closed space, one end of the water infiltration pipe is connected with a hollow drill rod, the other end penetrates through the water injection capsule and extends into the borehole, the water injection capsule is provided with a first water injection opening near the end of the hollow drill rod, the water infiltration pipe is provided with a water injection sleeve, a jacket is arranged between the outer wall of the water injection sleeve and the inner wall of the water infiltration pipe, a sound transmission device is arranged in the jacket, the water injection sleeve is provided with a second water injection opening near the end of the hollow drill rod and a permeation pipe used for infiltrating water into the borehole and a communication opening used for determining the water injection amount away from the end of the hollow drill rod, the water outlet of the permeation pipe is arranged between the communication opening and the sound transmission device and extends to the outside of the water infiltration pipe, and the connection part of the water infiltration pipe and the permeation pipe is sealed; The sound transmission device emits a sound signal when water overflows through the communication opening or the water level in the borehole is lower than the water outlet of the permeation pipe by a certain height. The intelligent timing system comprises a sound control instrument and a single-chip microcomputer, the sound control instrument is used for receiving the sound signal generated by the sound transmission device, the single-chip microcomputer is used for recording the interval time of the sound signal generated by the sound transmission device and controlling the water injection and water discharge actions of the water supply device, the sound control instrument is installed at the entrance of the borehole and is electrically connected with the single-chip microcomputer.

2. The coal mine goaf fracture development intelligent testing system according to claim 1, characterized in that: The water supply device comprises an intelligent water supply instrument used for water injection and water discharge, the intelligent water supply instrument comprises a conversion valve used for switching the water injection and water discharge actions and a motor used for driving the conversion valve to rotate, and the motor is electrically connected with the single-chip microcomputer. The sound transmission device comprises a percussion sound transmission device, a D-type sound transmission device and an electricity storage box. The shock sound transmission device comprises an electronic alarm and a transmission ball, the electronic alarm is fixed on the inner wall of the water seepage pipe, and a ball pit matched with the transmission ball is arranged on the upper end of the shell of the electronic alarm, a through hole is arranged at the bottom of the ball pit, and the touch button of the electronic alarm penetrates to above the through hole, the transmission ball falls into the ball pit to press the touch button of the electronic alarm, and the alarm can be sent, the electronic alarm can set the alarm time according to the requirement, a water container is arranged outside the water seepage pipe, a water leakage hole is arranged at the bottom of the water container, the water leakage amount of the water leakage hole is less than the water amount of the water seepage pipe flowing into the water container in the same time, the water container is arranged below the water outlet of the water seepage pipe and is fixedly connected with the transmission ball through a connecting rod, a flow guide plate is arranged between the water container and the water outlet of the water seepage pipe, the flow guide plate is connected to the outer wall of the water seepage pipe, a swing hole is arranged on the wall of the water seepage pipe and can swing up and down, a rubber sealing cover is arranged outside the swing hole, the rubber sealing cover is sealingly connected with the connecting rod, and the connecting rod is rotatably connected in the swing hole through a pin shaft; when the water container contains water, the transmission ball is lifted to be separated from the touch button of the electronic alarm, when the water in the water container flows out, the transmission ball falls to hit the touch button of the electronic alarm and causes the electronic alarm to send an alarm. The type D sound transmission device comprises an electronic alarm II, a rubber belt and a type D transmission disc; the type D transmission disc comprises a cylindrical stem and a water receiving disc, the water receiving disc is in the shape of a circular arc box, and the bottom of the water receiving disc is provided with a drainage hole, the drainage capacity of the drainage hole is less than the water inflow into the water receiving disc through the communication port at the same time; the top of the cylindrical stem is connected to the center of the bottom of the water receiving disc, and the bottom of the cylindrical stem is in the shape of a hemisphere, the two ends of the rubber belt are connected between the inner wall of the water seepage pipe and the outer wall of the water injection sleeve, and the connecting end of the rubber belt and the water injection sleeve is provided with a water outlet channel, the bottom of the water outlet channel is connected with the hollow drill pipe, the cylindrical stem of the type D transmission disc penetrates through the rubber belt and is fixedly connected with the rubber belt, the electronic alarm II is the same in structure as the electronic alarm I and is fixed on the outer wall of the water injection sleeve, the ball pit left on the upper end of the shell of the electronic alarm II is matched with the bottom of the cylindrical stem, the connecting end of the rubber belt and the water injection sleeve is higher than the connecting end of the rubber belt and the water seepage pipe, two baffles are correspondingly arranged on the two sides of the rubber belt, the two baffles are connected to the outer side wall of the water injection sleeve, and the baffles, the outer wall of the water injection sleeve and the inner wall of the water seepage pipe cooperate to make the water flowing out of the communication port fall into the water receiving disc or directly enter the water outlet channel, the two sides of the cylindrical stem of the type D transmission disc are correspondingly provided with guide plates, the two guide plates are arranged above the rubber belt and are respectively connected with the outer wall of the water injection sleeve and the inner wall of the water seepage pipe in a sliding mode, so that the type D transmission disc can only move up and down, when a certain amount of water falls into the type D transmission disc, the bottom of the cylindrical stem will fall and hit the touch button of the electronic alarm II, and the electronic alarm II will alarm, after the communication port stops discharging water, the water in the water receiving disc will slowly flow out of the drainage hole, through the rubber belt and the water outlet channel and then be discharged through the hollow drill pipe, and when the water flow in the water receiving disc is exhausted, the type D transmission disc will be driven back to the initial position under the elastic force of the rubber belt. The power storage box is arranged in the water seepage pipe and is mounted at the connecting end of the water seepage pipe and the hollow drill pipe, the power storage box takes the detachable No. 1 battery as a power supply to supply power to the electronic alarm I and the electronic alarm II.

3. The coal mine goaf fracture development intelligent testing system according to claim 2, characterized in that: The intelligent water instrument further comprises a shell, the conversion valve is arranged in the shell, the shell is provided with a first external water supply port, a second external water supply port, an external water inlet and an external water outlet, the first external water supply port is provided with a first water stop valve and a first pressure gauge, and the first external water supply port is connected with the first water injection port through a first high-pressure water pipe, the second external water supply port is provided with a second water stop valve and a second pressure gauge, and the second external water supply port is connected with the second water injection port through a second high-pressure water pipe, the conversion valve is in transmission connection with a motor arranged in the shell, the external water inlet is used for connecting a water injection pump or a manual pressure pump, the first external water supply port, the second external water supply port, the external water inlet and the external water outlet are all connected with the conversion valve, and the conversion valve can realize the separate connection of the first external water supply port or the second external water supply port with the external water inlet and the separate connection of the first external water supply port or the second external water supply port with the external water outlet.

4. The coal mine goaf fracture development intelligent testing system according to claim 3, characterized in that: The conversion valve comprises a valve body, a rotating disc, a sealing ring, a rotating shaft and a manual wheel disc, the valve body is provided with an inner water supply port, an inner water inlet port and an inner water outlet port; the inner water supply port is connected with a first outer water supply port and a second outer water supply port through a tee joint, the inner water inlet port is communicated with an outer water inlet port, the inner water outlet port is communicated with an outer water outlet port, the rotating disc and the sealing ring are integrated and sealingly connected in the valve body, one end of the rotating shaft is fixed at the center of the rotating disc, the other end of the rotating shaft is sealingly penetrated to the outside of the valve body and is drivingly connected with a motor through a gear transmission structure, the motor is drivingly connected with the rotating disc under the control of a single-chip microcomputer, the rotating angle of the rotating disc is 60° when the rotating disc rotates once, and the other end of the rotating shaft is further extended to the outside of the housing and is fixedly connected with the manual wheel disc.

5. The testing method of the coal mine goaf fracture development intelligent testing system according to claim 4, characterized in that, The method comprises the following steps: S1, after the water infiltration pipe is inserted into the borehole, the intelligent water passing instrument is started, the second water stop valve is closed, the first water stop valve is opened, water is passed to the water injection capsule through the first water injection port, the water injection capsule is expanded to block the lower end of the borehole, when the reading of the first pressure gauge reaches 4MPa, the first water stop valve is closed; S2, the second water stop valve is opened, water is passed to the water injection sleeve through the second water injection port, and the water flows out of the water outlet of the infiltration pipe; if the electronic alarm II does not alarm for more than half an hour, it is proved that the fissure development in this section of the borehole is too high, there is a large fissure, this section is skipped, the water infiltration pipe is pushed upward through the hollow drill rod, and the borehole section at the next height is measured; S3, until the following working process is started: the water flows out of the communication port and falls into the D-shaped transmission disc of the D-shaped sound transmission device, the D-shaped transmission disc falls and hits the touch button of the electronic alarm II, causing the electronic alarm II to alarm, at this time, it indicates that the water surface in the borehole has overflowed the water outlet of the infiltration pipe, after the sound control instrument receives the alarm of the electronic alarm II, the single-chip microcomputer starts timing and controls the motor to drive the conversion valve to rotate three times, the inner water supply port and the inner water inlet port are closed; when the water in the borehole seeps to the lower side of the water tank, and the water flow in the water tank is exhausted, after the sound control instrument receives the alarm of the electronic alarm I, the single-chip microcomputer stops timing and controls the motor to drive the conversion valve to rotate three times, the inner water supply port and the inner water inlet port are communicated; S4, when n groups of data need to be measured, the working process of step S3 is cycled at least (n-1) times, when the electronic alarm II alarms again, the single-chip microcomputer starts timing again and controls the motor to drive the conversion valve to rotate three times, the inner water supply port and the inner water inlet port are closed, when the electronic alarm I alarms again, the single-chip microcomputer stops timing and controls the motor to drive the conversion valve to rotate five times, the inner water inlet port is closed, the inner water supply port and the inner water outlet port are communicated, the residual water in the water infiltration pipe is discharged through the outer water outlet port, the first water stop valve is opened, the second water stop valve is closed, the water in the water injection capsule is discharged through the outer water outlet port, and the whole test process of the borehole section is completed; S5, the conversion valve is rotated four times by using the manual wheel disc, and the conversion valve returns to the starting position; according to the needs, the next section of the borehole or other boreholes are detected according to the above steps S1-S4. S6. After the test is completed, the data stored in the microcontroller is promptly transferred to the computer for processing. If the measured data are all too large, it proves that the goaf fissures are underdeveloped or have a low degree of development, the gas content is low, and the goaf has a low gas content. If the measured data are all too small, it proves that the goaf fissures are highly developed, the gas content is large, and the goaf has a high gas content.

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