CN109611078B - Self-adaptive angle-adjusting double-end water shutoff measuring device - Google Patents
Self-adaptive angle-adjusting double-end water shutoff measuring device Download PDFInfo
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- CN109611078B CN109611078B CN201811598016.1A CN201811598016A CN109611078B CN 109611078 B CN109611078 B CN 109611078B CN 201811598016 A CN201811598016 A CN 201811598016A CN 109611078 B CN109611078 B CN 109611078B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000001514 detection method Methods 0.000 claims abstract description 85
- 238000002347 injection Methods 0.000 claims abstract description 57
- 239000007924 injection Substances 0.000 claims abstract description 57
- 238000005553 drilling Methods 0.000 claims abstract description 44
- 239000002775 capsule Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000011435 rock Substances 0.000 claims description 38
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 description 11
- 230000006872 improvement Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a self-adaptive angle-adjusting double-end water shutoff measuring device, which comprises a mobile detection device, a hole control end, a handheld control end and a measuring control line, wherein the mobile detection device is connected with the hole control end; the device also comprises a plurality of hoses which can enable the whole device to be matched with the drill hole, a water injection pipe used for injecting water and plugging devices used for plugging at two ends, wherein the hoses and the water injection pipe are positioned between the two plugging devices, and the mobile detection device is arranged between the two plugging devices or at the front end of one plugging device; a plurality of water outlet holes are formed in the periphery of the water injection pipe; the plugging device comprises sealing rings at two ends, an elastic capsule arranged between the two sealing rings and a filling hole arranged on one sealing ring, wherein the filling hole is communicated with the inner cavity of the elastic capsule. The self-adaptive angle-adjusting double-end water shutoff measuring device can freely move in a drilling hole, an operator uses a handheld control end to operate a movement detecting device to move, and detected data (drilling depth, pictures and the like) are displayed and stored in real time.
Description
Technical Field
The invention relates to the technical field of mine stratum state detection and inspection equipment, in particular to a self-adaptive angle-adjusting double-end water shutoff measuring device.
Background
During the construction, maintenance and research of mine channels and tunnels, rock formations are often required to be drilled and detected, so that the internal conditions and the change trend of the rock formations can be known in time. At present, the main detection means mainly comprises a robot for detection, such as CN2016104315991, a chinese patent named rock drilling tour detection robot, a rock drilling device, a mobile detection device, a measurement control line, a hole control end and a handheld control end, wherein the mobile detection device can freely move in the rock drilling 5, the measurement control line is located between the mobile detection device and the hole control end, the hole control end can be fixed at the rock drilling hole, an operator can control the movement of the mobile detection device by using the handheld control end, and store and display detected data in real time.
In fact, there are other methods for testing the drilling hole of the rock stratum, such as using the water pressure change to test the stress change of the drilling hole of the rock stratum, but all the devices for testing the drilling hole condition of the rock stratum in the prior art generally cannot adapt to the angle change of the drilling hole, and when the drilling hole is deeper and is a nonlinear hole, the device for testing the drilling hole in the prior art cannot complete the testing work of the drilling hole.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the self-adaptive angle-adjusting double-end water shutoff measuring device which can adapt to the angle change of a drilling hole, can realize the characteristics of high testing speed, accurate and reliable testing result and low working strength, has important practical significance for evaluating the drilling hole shape or rock stratum state, and has wide application prospect.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the self-adaptive angle-adjusting double-end water shutoff measuring device comprises a mobile detecting device, a hole control end, a handheld control end and a measuring control line; the measuring control line transmits signal energy between the mobile detection device and the hole control end, the distance between the mobile detection device and the hole is judged by detecting the length of the measuring control line, the hole control end is fixed at the hole of the rock stratum, and an operator controls the movement of the mobile detection device by using the handheld control end, so that the detected data is stored and displayed in real time; the self-adaptive angle-adjusting double-end water shutoff measuring device also comprises a plurality of hoses, water injection pipes and plugging devices, wherein the hoses can enable the whole device to be matched with a drill hole, the water injection pipes are used for injecting water, the plugging devices are used for plugging at two ends, the hoses and the water injection pipes are positioned between the two plugging devices, and the mobile detection device is arranged between the two plugging devices or at the front end of one plugging device; a plurality of water outlet holes are formed in the periphery of the water injection pipe; the plugging device comprises sealing rings at two ends, an elastic capsule arranged between the two sealing rings and a filling hole arranged on one sealing ring, wherein the filling hole is communicated with the inner cavity of the elastic capsule.
As an improvement to the technical scheme, the number of the mobile detection devices is two, and the number of the hose, the water injection pipe and the plugging device is at least two; the plugging device comprises a capsule water pipe which is arranged in the inner cavity of the elastic capsule and penetrates through sealing rings at two ends, and the capsule water pipe is communicated with the water injection pipe or is a part of the water injection pipe; at this time, one of the mobile detection devices is arranged in the middle of the whole water plugging device, the hoses are arranged at two ends of the mobile detection device, the water injection pipes are respectively arranged at the outer ends of the two hoses, the other mobile detection device is arranged at the front end of the plugging device, and the front end of the mobile detection device is provided with a camera.
As an improvement to the above technical solution, the number of the movement detection devices is three, at this time, one movement detection device is arranged between two hoses, the other movement detection device is arranged at the front end of the plugging device, and the front end of the movement detection device is provided with a camera; the third movement detection device is arranged between the other plugging device and the water injection pipe.
As an improvement to the technical scheme, the plugging device comprises a water injection pipeline and an inflation pipeline; one end of the water injection pipeline is connected with the capsule water pipe, one end of the water injection pipeline is connected with a water injection control console, and the water injection control console is connected with a high-pressure water source; one end of the inflation pipeline is connected with the inflation hole, and the other end of the inflation pipeline is connected with the inflation control console which is connected with the high-pressure air source.
As an improvement to the technical scheme, the movement detection device comprises a support frame, a wheel frame arranged on the periphery of the support frame, wheels rotatably arranged on the wheel frame and a wheel driving motor for driving the wheels to rotate, and the movement detection device comprises two wheel frames, two wheels and two wheel driving motors.
As an improvement to the technical scheme, the supporting frame is provided with a rock hardness tester, and the rock hardness tester can rotate around the supporting frame within a 360-degree range and is used for detecting the hardness value of each rock; an observation probe is arranged on the middle movement detection device.
As an improvement to the technical scheme, the hole control end is provided with a displacement detection device, and the displacement detection device judges the distance between the mobile detection device and the drilling hole through measuring the measurement control line.
As an improvement to the technical scheme, a power supply is arranged on the control end of the opening, and the power supply supplies electric energy for the operation of the mobile detection device through a measurement control line. The hole control end is provided with 3 drilling fixing springs, the drilling fixing springs are uniformly distributed around the hole control end, the drilling fixing springs deform when the hole control end is inserted into a drill hole, and the drilling fixing springs extrude the rock wall of the rock stratum drilling to enable friction force to be generated between the hole control end and the rock wall to fix the hole control end.
The device comprises a hole control end, a signal processing module, a mobile detection device and a displacement detection device, wherein the hole control end is provided with the signal processing module, the signal processing module can receive signals sent by the handheld control end and send control instructions to the mobile detection device, and data detected by the mobile detection device and data detected by the displacement detection device are transmitted to the handheld control end through the hole control end.
As an improvement to the technical scheme, the water injection pipe is an aluminum alloy water injection pipe, and the hose is a steel hose.
Compared with the prior art, the invention has the beneficial effects that:
the self-adaptive angle-adjusting double-end water shutoff measuring device is embedded into a drill hole after the drill hole passes through a stope overlying rock water fracture zone, and can freely move in the drill hole and adapt to the drill hole due to the flexible pipe arranged in the device, is suitable for drilling holes with straight holes or bending holes, an operator uses a handheld control end to operate a movement detecting device to move, real-time display and storage are carried out on detected data (drilling depth, pictures and the like), after the device moves to a designated position, the capsule filling is completed through the capsule filling hole on the plugging device, the upper end and the lower end of the device are plugged, then water is injected into the aluminum alloy water injection pipe and the steel hose through the water injection hole on the plugging device, after the water injection observation of the plugging section is completed, the pressure is relieved, water is discharged, so that the capsule on the plugging device is restored to the original state, other positions needing to be observed are observed again, the water permeability of the rock stratum is tested section by using the observation probe in the drilled hole, and the upper limit of the water guide fracture zone is judged by the water permeability of the rock stratum. The device can carry out shooting, height recording, crack leakage detection and the like on the drilling hole, has the advantages of simple whole process, high test speed, accurate and reliable test result, low working strength and wide application prospect, can adapt to the angle change of the drilling hole, and has important practical significance on the evaluation of the drilling hole shape or the rock stratum state.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a motion detection apparatus of the present invention;
FIG. 3 is a block diagram of an occluding device of the present invention;
FIG. 4 is a block diagram of the opening control end of the present invention;
FIG. 5 is a schematic diagram of the connection structure of the water injection pipeline and the inflation pipeline according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, modifications, equivalents, improvements, etc., which are apparent to those skilled in the art without the benefit of this disclosure, are intended to be included within the scope of this invention.
As shown in fig. 1, 2, 3, 4 and 5, the self-adaptive angle-adjusting double-end water shutoff measuring device comprises a mobile detecting device 1, a hole control end 5, a hand-held control end 6 and a measuring control line 7; the measuring control line 7 transmits signal energy between the mobile detection device 1 and the hole control end 5, the distance between the mobile detection device 1 and the hole is judged by detecting the length of the measuring control line 7, the hole control end 5 is fixed at the hole of the rock stratum, and an operator controls the movement of the mobile detection device 1 by using the handheld control end 6, so that detected data are stored and displayed in real time; the self-adaptive angle-adjusting double-end water shutoff measuring device also comprises a plurality of hoses 4 which can enable the whole device to be matched with a drill hole, a water injection pipe 3 for injecting water and shutoff devices 2 for shutoff at two ends, wherein the hoses 4 and the water injection pipe 3 are positioned between the two shutoff devices 2, and the mobile detection device 1 is arranged between the two shutoff devices 2 or at the front end of one of the shutoff devices 2; a plurality of water outlet holes (not shown in the figure) are formed in the periphery of the water injection pipe 3; the plugging device 2 comprises sealing rings 201 at two ends, an elastic capsule 202 arranged between the two sealing rings 201 and a filling hole 203 communicated with the inner cavity of the elastic capsule 202, wherein the filling hole 203 is communicated with the inner cavity of the elastic capsule 202.
The measuring control line 7 transmits signal energy between the mobile detection device 1 and the hole control end 5, the distance between the mobile detection device 1 and the hole is determined by detecting the length of the measuring control line 7, the hole control end 5 can be fixed at the hole of a rock stratum, and an operator controls the movement of the mobile detection device 1 by using the handheld control end 6, so that detected data are stored and displayed in real time.
The number of the movement detection devices 1 is two, 104 and 105 respectively, and the number of the hose 4, the water injection pipe 3 and the plugging device 2 is at least two; the plugging device 2 comprises a capsule water pipe 202 which is arranged in the inner cavity of the elastic capsule 202 and passes through sealing rings at two ends, and the capsule water pipe 204 is communicated with the water injection pipe 3 or is a part of the water injection pipe; at this time, one of the movement detection devices 104 is provided in the middle of the whole water shutoff device, the hoses 4 are provided at both ends of the movement detection device 104, the water injection pipes 3 are respectively provided at the outer ends of the two hoses 4, the other movement detection device 105 is provided at the front end of the shutoff device 2, and the front end of the movement detection device 105 is provided with a camera. The camera can shoot video images in the rock stratum drilling hole.
The plugging device comprises a water injection pipeline 9 and an expanding pipeline 11; one end of the water injection pipeline 9 is connected with the capsule water pipe 204, one end of the water injection pipeline is connected with the water injection control console 10, and the water injection control console 10 is connected with a high-pressure water source; one end of the inflation pipeline 11 is connected with the inflation hole 203, and the other end is connected with the inflation control console 8, and the inflation control console 8 is connected with a high-pressure air source.
The number of the movement detection devices 1 is three, at this time, one movement detection device 104 is arranged between two hoses, the other movement detection device 105 is arranged at the front end of the plugging device 2, and a camera is arranged at the front end of the movement detection device 105; a third movement detection means is arranged 106 between the other plugging means 2 and the water injection pipe 3.
The motion detection device 1 comprises a support frame 101, a wheel frame 103 arranged on the periphery of the support frame, wheels 102 rotatably arranged on the wheel frame 103 and a wheel driving motor (not shown in the figure) for driving the wheels 102 to rotate, and one motion detection device comprises two wheel frames 103, two wheels 102 and two wheel driving motors.
The supporting frame 101 is provided with a rock hardness tester 107, and the rock hardness tester 107 can rotate around the supporting frame 101 within a 360-degree range and is used for detecting hardness values of rocks at all positions; an observation probe (not shown) is provided on the intermediate movement detection device 104.
The hole control end 5 is provided with a displacement detection device 205, and the displacement detection device 205 determines the distance between the mobile detection device 1 and the drilling hole by measuring the measurement control line 5.
The power supply 501 is arranged on the opening control end 5, and the power supply 501 provides electric energy for the movement detection device 1 to work through the measurement control line 7. The hole control end 5 is provided with 3 drilling fixing springs 502, the drilling fixing springs 502 are uniformly distributed around the hole control end, the drilling fixing springs 502 deform when the hole control end 5 is inserted into a drilled hole, and the drilling fixing springs 502 are used for fixing the hole control end by extruding the rock wall of the rock stratum drilling so that friction force is generated between the hole control end 5 and the rock wall.
The hole control end 5 is provided with a signal processing module, the signal processing module can receive a signal sent by the handheld control end 6 and send a control instruction to the movement detection device 1, and data detected by the movement detection device 1 and data detected by the displacement detection device 205 are transmitted to the handheld control end 6 through the hole control end 5. The water injection pipe 3 is an aluminum alloy water injection pipe, and the hose 4 is a steel hose.
The self-adaptive angle-adjusting double-end water shutoff measuring device is embedded into a drill hole after the drill hole passes through a stope overlying rock water fracture zone, and can freely move in the drill hole and adapt to the drill hole due to the flexible pipe arranged in the device, is suitable for drilling holes with straight holes or bending holes, an operator uses a handheld control end to operate a movement detecting device to move, real-time display and storage are carried out on detected data (drilling depth, pictures and the like), after the device moves to a designated position, the capsule filling is completed through the capsule filling hole on the plugging device, the upper end and the lower end of the device are plugged, then water is injected into the aluminum alloy water injection pipe and the steel hose through the water injection hole on the plugging device, after the water injection observation of the plugging section is completed, the pressure is relieved, water is discharged, so that the capsule on the plugging device is restored to the original state, other positions needing to be observed are observed again, the water permeability of the rock stratum is tested section by using the observation probe in the drilled hole, and the upper limit of the water guide fracture zone is judged by the water permeability of the rock stratum. The device can carry out shooting, height recording, crack leakage detection and the like on the drilling hole, has the advantages of simple whole process, high test speed, accurate and reliable test result, low working strength and wide application prospect, can adapt to the angle change of the drilling hole, and has important practical significance on the evaluation of the drilling hole shape or the rock stratum state.
Claims (4)
1. The self-adaptive angle-adjusting double-end water shutoff measuring device comprises a mobile detecting device, a hole control end, a handheld control end and a measuring control line; the measuring control line transmits signal energy between the mobile detection device and the hole control end, the distance between the mobile detection device and the hole is judged through the detection of the length of the measuring control line, and the hole control end is fixed at the stratum hole; the self-adaptive angle-adjusting double-end water shutoff measuring device is characterized by further comprising a plurality of hoses, water injection pipes and plugging devices, wherein the hoses are used for enabling the whole device to be matched with a drill hole, the water injection pipes are used for injecting water, the plugging devices are used for plugging at two ends, the hoses and the water injection pipes are positioned between the two plugging devices, and the mobile detecting device is arranged between the two plugging devices or at the front end of one plugging device; a plurality of water outlet holes are formed in the periphery of the water injection pipe; the plugging device comprises sealing rings at two ends, an elastic capsule arranged between the two sealing rings and a filling hole arranged on one sealing ring, wherein the filling hole is communicated with the inner cavity of the elastic capsule;
the movement detection device comprises a support frame, a wheel frame arranged on the periphery of the support frame, wheels rotatably arranged on the wheel frame and a wheel driving motor for driving the wheels to rotate, and the movement detection device comprises two wheel frames, two wheels and two wheel driving motors;
the supporting frame is provided with a rock hardness tester; the device comprises a hole control end, a middle moving detection device and an observation probe, wherein the hole control end is provided with a displacement detection device;
a power supply is arranged on the opening control end and supplies electric energy for the operation of the mobile detection device through a measurement control line; the hole control end is provided with 3 drilling fixing springs, the drilling fixing springs are uniformly distributed around the hole control end, the drilling fixing springs deform when the hole control end is inserted into a drilling hole, and the drilling fixing springs extrude the rock wall of a rock stratum drilling hole to enable friction force to be generated between the hole control end and the rock wall to fix the hole control end;
the device comprises a hole control end, a signal processing module, a mobile detection device, a displacement detection device and a control module, wherein the hole control end is provided with the signal processing module, the signal processing module receives a signal sent by the handheld control end and sends a control instruction to the mobile detection device, and data detected by the mobile detection device and data detected by the displacement detection device are transmitted to the handheld control end through the hole control end;
the water injection pipe is an aluminum alloy water injection pipe, and the hose is a steel hose.
2. The self-adaptive angle-adjusting double-end water shutoff measuring device according to claim 1, wherein the number of the movement detecting devices is two, and the number of the hose, the water injection pipe and the shutoff device is at least two; the plugging device comprises a capsule water pipe which is arranged in the inner cavity of the elastic capsule and penetrates through sealing rings at two ends, and the capsule water pipe is communicated with the water injection pipe or is a part of the water injection pipe; at this time, one of the mobile detection devices is arranged in the middle of the whole water plugging device, the hoses are arranged at two ends of the mobile detection device, the water injection pipes are respectively arranged at the outer ends of the two hoses, the other mobile detection device is arranged at the front end of the plugging device, and the front end of the mobile detection device is provided with a camera.
3. The self-adaptive angle-adjusting double-end water shutoff measuring device according to claim 1, wherein the number of the movement detecting devices is three, at the moment, the first movement detecting device is arranged between two hoses, the second movement detecting device is arranged at the front end of the shutoff device, and a camera is arranged at the front end of the movement detecting device; the third movement detection device is arranged between the other plugging device and the water injection pipe.
4. The self-adaptive angle-adjusting double-end water shutoff measuring device according to claim 2 or 3, wherein the shutoff device comprises a water injection pipeline and an inflation pipeline; one end of the water injection pipeline is connected with the capsule water pipe, one end of the water injection pipeline is connected with a water injection control console, and the water injection control console is connected with a high-pressure water source; one end of the inflation pipeline is connected with the inflation hole, and the other end of the inflation pipeline is connected with the inflation control console which is connected with the high-pressure air source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598016.1A CN109611078B (en) | 2018-12-26 | 2018-12-26 | Self-adaptive angle-adjusting double-end water shutoff measuring device |
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| CN201811598016.1A CN109611078B (en) | 2018-12-26 | 2018-12-26 | Self-adaptive angle-adjusting double-end water shutoff measuring device |
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| CN109611078A CN109611078A (en) | 2019-04-12 |
| CN109611078B true CN109611078B (en) | 2023-09-01 |
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| CN112145118B (en) * | 2020-10-19 | 2022-05-13 | 华北科技学院 | Double-end water plugging device integrating drilling peeking function and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525910A (en) * | 2015-12-09 | 2016-04-27 | 山东科技大学 | Multi-section blocking and double-end observation method |
| CN107191165A (en) * | 2017-04-19 | 2017-09-22 | 中煤科工集团西安研究院有限公司 | Both-end blocks water filling device in hole |
| CN108643891A (en) * | 2018-04-20 | 2018-10-12 | 大连理工大学 | A kind of single loop overlying strata crack double-end sealing leak detection method |
| CN108645774A (en) * | 2018-04-20 | 2018-10-12 | 大连理工大学 | A kind of single loop overlying strata crack double-end sealing leak detection system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8442769B2 (en) * | 2007-11-12 | 2013-05-14 | Schlumberger Technology Corporation | Method of determining and utilizing high fidelity wellbore trajectory |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525910A (en) * | 2015-12-09 | 2016-04-27 | 山东科技大学 | Multi-section blocking and double-end observation method |
| CN107191165A (en) * | 2017-04-19 | 2017-09-22 | 中煤科工集团西安研究院有限公司 | Both-end blocks water filling device in hole |
| CN108643891A (en) * | 2018-04-20 | 2018-10-12 | 大连理工大学 | A kind of single loop overlying strata crack double-end sealing leak detection method |
| CN108645774A (en) * | 2018-04-20 | 2018-10-12 | 大连理工大学 | A kind of single loop overlying strata crack double-end sealing leak detection system |
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