LU501939B1 - Device and method for active measurement of cross-fault interface newton force in shale gas mining process - Google Patents
Device and method for active measurement of cross-fault interface newton force in shale gas mining process Download PDFInfo
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- LU501939B1 LU501939B1 LU501939A LU501939A LU501939B1 LU 501939 B1 LU501939 B1 LU 501939B1 LU 501939 A LU501939 A LU 501939A LU 501939 A LU501939 A LU 501939A LU 501939 B1 LU501939 B1 LU 501939B1
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000005259 measurement Methods 0.000 title claims abstract description 30
- 238000005065 mining Methods 0.000 title claims description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 230000000712 assembly Effects 0.000 claims abstract description 19
- 238000000429 assembly Methods 0.000 claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 18
- 230000008261 resistance mechanism Effects 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims description 27
- 238000005553 drilling Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001350 orogenic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- 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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- 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
- E21B47/007—Measuring stresses in a pipe string or casing
-
- 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
- E21B49/006—Measuring wall stresses in the borehole
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A device for active measurement of cross-fault interface Newton force in the shale gas exploitation process, comprising an NPR anchor cable (1) and at least one pair of measurement assemblies (2) symmetrically sleeved on the NPR anchor cable. The measurement assemblies comprise a platform mechanism (21), a squeezing mechanism (22), a constant resistance mechanism (23) and a sensing mechanism (24). Further disclosed is a method for active measurement of cross-fault interface Newton force in the shale gas exploitation process, the specific steps being: acquiring at least one pair of symmetrically arranged measurement assemblies and inserting them into a rock hole, so that each pair of symmetrically arranged measurement assemblies are respectively located on two sides of a rock fault, and measuring in real time key parameters influencing fault stability. The measuring device and method of the present invention can accurately and constantly collect the key parameters affecting the fault stability on the cross-fault interface in the fracturing process for the identified dangerous faults, so as to provide data support for the prediction of disasters.
Description
BL-5490 ' LU501939
BACKGROUND Field of Invention The present invention belongs to the field of shale gas exploitation and Newton force of a cross-fault interface monitoring, in particular relates to a device and method for active measurement of cross-fault interface Newton force in a shale gas mining process. Background of the Invention Hydraulic fracturing is an important means of high-efficiency development of shale gas with wide application prospects, the hydraulic fracturing is to use surface high-pressure pump to squeeze and inject fracturing fluid with high viscosity into the oil layer through the wellbore, when the injection speed of fracturing fluid exceeds the absorption capacity of the oil layer, a high pressure will be formed on the oil layer at the bottom of the well, when this pressure exceeds the fracture pressure of the rock near the bottom of the well, the oil layer will be pressed open and cracks will be generated. In the actual process of hydraulic fracturing, the micro- seismic monitoring of rock stratum is very important, which is directly
BL-5490 LU501939 related to the fracturing effect of hydraulic fracturing. At the same time, in recent years, seismic disasters related to hydraulic fracturing have become more and more frequent. Different from the large plate shale gas with stable structure in North America, China’s shale gas reserves are mainly focus on Sichuan Basin, Chongqing, Hubei, Hunan, Guizhou and Guangxi and other complex mountain areas in the south, due to the strong transformation of intracontinental orogenic basin forming tectonic movement in the late Indosinian period, it shows significant geological characteristics of “strong transformation, over maturation and high stress”. In the geological environment of mountain shale gas, the construction pressure of hydraulic fracturing is higher, resulting in more frequent and intense geological disasters such as earthquakes.
Therefore, the accurate monitoring and early warning of seismic disasters induced by hydraulic fracturing of mountain shale gas is a key problem in the national shale gas energy strategy.
At present, micro-seismic monitoring technology is mostly used to monitor seismic disasters induced by shale gas hydraulic fracturing. Micro- seismic monitoring technology is a high-tech and information-based dynamic monitoring technology for underground engineering, it collects and gathers the seismic wave signals emitted by rock mass failure or rock fracture through sensors, and processes and analyzes the seismic wave signals, so as to obtain the location, magnitude, energy, seismic moment
BL-5490 ’ LU501939 and other information of vibration, it has become the preferred monitoring technology means for underground geological structure exploration.
However, since the micro-seismic monitoring sensors used in the existing micro-seismic monitoring system are installed underground, the following problems exist in the actual use process: (1) The installation of micro-seismic monitoring sensor is difficult, the installation method is complex, time-consuming and laborious, and the installation cost 1s high; (2) The installation quality is difficult to guarantee, and the installed sensor is easy to fall off, which affects the normal monitoring process of micro-seismic monitoring system; (3) Because the micro-seismic monitoring signal is located below the ground, its signal attenuation is large due to the long transmission distance, which affects the monitoring accuracy; (4) Micro-seismic monitoring lacks the monitoring of stress, strain and other key factors of the internal mechanism of fault activation and disaster preparation, and the accuracy of disaster prediction is limited.
Therefore, how to make the active measurement of Newton force cross-fault interface in shale gas exploitation have the advantages of low cost, high precision, good quality and high accuracy of fault activation and disaster detection, which has become an important problem to be solved urgently.
BL-5490 LU501939
SUMMARY The purpose of the invention is to provide a device for active measurement of cross-fault interface Newton force in the shale gas mining process, and a method for active measurement of cross-fault interface Newton force in the shale gas mining process by using the device, so as to solve the problems that in the prior art of shale gas exploitation, the active measurement cost of cross-fault interface Newton force is high, the accuracy 1s low, and the quality cannot be guaranteed, and the accuracy of fault activation disaster detection is limited.
In order to achieve the above purpose, the invention provides the following technical scheme: a device for active measurement of cross-fault interface Newton force in the shale gas mining process, which comprises NPR anchor cable and at least one pair of measuring assemblies symmetrically sleeved on NPR anchor cable; the measuring assemblies comprise a platform mechanism, an extrusion mechanism, a constant resistance mechanism and a sensing mechanism; a through hole is arranged in the vertical direction of the platform mechanism, and a hole is arranged on the side wall of the platform mechanism;
BL-5490 ) LU501939 one side of the extrusion mechanism is fixedly connected with an elastic unit, the extrusion mechanism is detachably connected to both sides of the platform mechanism through the elastic unit and the hole, and the other side of the extrusion mechanism is provided with friction parts with uneven surface; the constant resistance mechanism comprises an NPR constant resistance body and a sleeve; a chuck with a through hole is fixedly arranged in the middle of the sleeve, the NPR constant resistance body is movably connected to the sleeve above the chuck, the NPR anchor cable passes through the NPR constant resistance body and anchors with the NPR constant resistance body, and the constant resistance mechanism is fixedly connected inside the through hole of the platform mechanism through the sleeve; the sensing mechanism is fixedly sleeved outside the sleeve under the chuck; the platform mechanism is fixedly sleeved outside the sleeve through the through hole, the platform mechanism is located below the sensing mechanism, and the sensing mechanism is located between the chuck and the platform mechanism.
A method for active measurement of cross-fault interface Newton force in the shale gas mining process, the steps are as follows: S1, drilling on the rock, which runs through both sides of the cross- fault interface;
BL-5490 LU501939 S2, inserting the measuring device into the borehole, and the measuring assemblies symmetrically sleeved on the NPR anchor cable are arranged on both sides of the rock cross-fault interface respectively, the sensing mechanism in the measuring device detects the key parameters affecting the fault stability caused by the sliding of the active fault in real time.
Beneficial effects
1. The device for active measurement of cross-fault interface Newton force in the shale gas mining process of the present invention is provided with friction parts, and the bulge matches the inner diameter of the first hole or the second hole, so that there is no relative sliding among the extrusion mechanism, the platform mechanism and the hole wall of the rock hole, which lays a foundation for accurately and accurately measuring the cross-fault interface Newton force in shale gas development and production.
2. The measuring method of the present invention can accurately collect the key parameters (Newton force) affecting the fault stability on the cross-fault interface during the fracturing process, so as to provide data support for disaster prediction.
BL-5490 ! LU501939
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural schematic diagram of a device for active measurement of cross-fault interface Newton force in the shale gas mining process in Example 1; Fig. 2 is a schematic structural diagram of the measuring assembly in Example 1; Fig. 3 is a schematic structural diagram of the platform mechanism in Example 1; Fig. 4 is a structural schematic diagram of the extrusion mechanism in Example 1; Fig. 5 is a structural diagram of the constant resistance mechanism in Example 1; Fig. 6 is a schematic sectional structure diagram of the constant resistance mechanism in Example 1; Fig. 7 1s a structural diagram of NPR anchor cable and one of the measuring assemblies in Example 1; Fig. 8 is a schematic diagram of the position of the measuring assembly in Example 2 when actively measuring the cross-fault interface Newton force in the shale gas mining process; Fig. 9 is a schematic diagram of the position structure without relative sliding when actively measuring the cross-fault interface Newton force in the shale gas mining process in Example 2.
BL-5490 ; LU501939 In the figure: 1. NPR anchor cable, 2. measuring assembly, 21. platform mechanism, 22. extrusion mechanism, 23. constant resistance mechanism, 24. sensing mechanism, 211. through hole, 212. first hole, 213. second hole, 221. protrusion, 222. friction part, 2221. elastic unit, 231. NPR constant resistance body, 232. sleeve, 2321. chuck, 3. fault, 4. rock,
5. hole wall.
DETAILED DESCRIPTION OF THE EMBODIMENTS Example 1 As shown in Figure 1 to figure 9, a device for active measurement of cross-fault interface Newton force in the shale gas mining process is shown in Figure 1: The measuring device comprises an NPR anchor cable 1 and a pair of measuring assemblies 2 symmetrically sleeved on the NPR anchor cable 1; As shown in Fig. 2, the measuring assemblies 2 comprise a platform mechanism 21, an extrusion mechanism 22, a constant resistance mechanism 23 and a sensing mechanism 24; As shown in Fig. 3, a through hole 211 is arranged in the vertical direction of the platform mechanism 21, the left part of the platform mechanism 21 1s provided with a first hole 212, and the right part of the
BL-5490 ’ LU501939 platform mechanism 21 is provided with a second hole 213; specifically, the first hole 212 and the second hole 213 are cylindrical holes, and their sizes and lengths are equal.
As shown in Fig. 4, one side of the extrusion mechanism 22 is fixedly provided with a protrusion 221, and the other side is fixedly provided with a burr-shaped friction part 222, the material of the friction part 222 is rubber or metal (such as iron or steel), so that the friction part 222 has a certain friction force and ensures that the friction part 222 has a certain degree of wear resistance, the contact surface between the friction part 222 and the hole wall 5 adopts super friction material, which can ensure that the extrusion mechanism 22 and the hole wall do not have relative displacement; the protrusion 221 is fixedly connected with an elastic unit 2221; the elastic unit 2221 1s a spring; the extrusion mechanism 22 is provided with two, the two extrusion mechanisms 22 are symmetrically arranged on both sides of the platform mechanism 21, specifically, the two springs are respectively located in the first hole 212 and the second hole 213, and the spring is in the pre-compressed state, the setting of the pre- compression spring is convenient for placing the Newton force measuring device into the hole, and in cooperation with the extrusion mechanism 22, the Newton force measuring device is closely connected with the surrounding rock.
BL-5490 LU501939 The protrusion 221 matches the inner diameter of the first hole 212 or the second hole 213, and the length of the protrusion 221 is less than the inner length of the first hole 212 or the second hole 213, so that the spring fixed on the protrusion 221 is in a pre-compressed state.
The two sides of the platform mechanism 21 are symmetrical and detachably connected with the extrusion mechanism 22, and the protrusion 221 1s plugged with the first hole 212 or the second hole 213; the free end of the elastic unit 2221 is located at the end of the first hole 212 or the second hole 213 (that 1s the end away from the hole orifice); so that there 1s no up-and-down sliding between the extrusion mechanism 22 and the platform mechanism 21; specifically, one end of the elastic unit 2221 (such as spring) with high strength is installed on the protrusion 221, and one end 1s compressed against the hole tail of the first hole 212 or the second hole 213, so as to ensure that there is no up-and-down sliding between the extrusion mechanism 22 and the platform mechanism 21.
As shown in Fig. 5 and Fig. 6, the constant resistance mechanism 23 comprises an NPR constant resistance body 231 and a sleeve 232. specifically, the NPR constant resistance body 231 is a cone-shaped constant resistance body with a through hole, and the size of the through hole matches the thickness of the NPR anchor cable 1 to prevent the NPR anchor cable 1 from shaking in the through hole; a chuck 2321 with a through hole is fixedly arranged on the sleeve 232, and the NPR constant
BL-5490 LU501939 resistance 231 1s detachably connected above the chuck 2321 in the sleeve
232. As shown in Fig. 7, the NPR anchor cable 1 passes through the through hole of the NPR constant resistance body 231 and anchors with the NPR constant resistance body 231, so that the NPR anchor cable 1 is always fixedly connected with the through hole of the NPR constant resistance body 231 to prevent its sound relative displacement; the sensing mechanism 24 is fixedly sleeved under the chuck 2321 outside the sleeve 232, specifically, the sensing mechanism 24 is an extrusion static dynamic sensor group, which can remotely transmit the Newton force generated by the chuck 2321 after being stressed by the static dynamic sensor group; the platform mechanism 21 is fixedly sleeved outside the sleeve 232 through the through hole 211; the platform mechanism 21 is located below the sensing mechanism 24.
Example 2 The Newton force active measuring device of Example 1 is used to measure the cross-fault interface Newton force in the shale gas mining process, the specific steps are as follows: S1, drilling on the rock, which runs through both sides of the cross- fault interface;
BL-5490 LU501939 S2, inserting the measuring device into the borehole, and the measuring assemblies symmetrically sleeved on the NPR anchor cable are arranged on both sides of the rock cross-fault interface respectively, the sensing mechanism in the measuring device detects the key parameters affecting the fault stability caused by the sliding of the active fault in real time.
Specifically, in shale gas mining, holes are opened in advance for the identified dangerous faults, and multiple pairs of symmetrically arranged measuring assemblies 2 of Example 1 are connected in series on an NPR anchor cable 1, the symmetrically arranged measuring assemblies 2 make the directions of the measuring assemblies 2 different, so as to avoid the constant resistance mechanism 23 acting on the measuring assemblies 2 in the same direction, so as to improve the measurement accuracy; inserting into the pre-opened hole of the rock, as shown in Fig. 8, so that each pair of symmetrically arranged measuring assemblies 2 are located on both sides of the fault 3; the Newton force can be collected continuously in real time, and the series method has the advantage of point domain monitoring.
As shown in Fig. 9, the friction part 222 of the extrusion mechanism 22 is in contact with the wall surface of the hole wall 5 of the hole on the rock 4, since the contact surface between the friction part 222 and the hole wall 5 adopts super friction material, and the protrusion 221 matches the inner diameter of the first hole 212 or the second hole 213, there is no
BL-5490 LU501939 relative sliding among the extrusion mechanism 22, the platform mechanism 21 and the hole wall 5 of the hole. When a disaster occurs, the active fault 3 slides, which drives the NPR constant resistance body 231 anchoring the NPR anchor cable 1 to displace in the sleeve 232, when the Newton force (tensile force) generated by the sliding of the active fault 3 on the NPR constant resistance body 231 is greater than the friction between the active fault 3 and the sleeve 232, the NPR anchor cable 1 slides along the sleeve 232 or displaces in the sleeve 232 with the NPR constant resistance body 231; further, the NPR constant resistance 231 squeezes the chuck 2321 to force it, and the variable force is remotely transmitted by the sensing mechanism 24, and the measurement 1s completed.
To sum up, the Newton force active measuring device of the present invention is provided with the friction part 222, and the protrusion 221 matches the inner diameter of the first hole 212 or the second hole 213, so that there is no relative sliding between the extrusion mechanism 22, the platform mechanism 21 and the hole wall 5 of the rock hole, which lays a foundation for accurately and precisely measuring the Newton force of a across the fault interface in shale gas exploitation; the Newton force active measuring device of the present invention can continuously collect the Newton force generated by the displacement of the active fault 3 in real time, and the method of multiple pairs of symmetrically arranged
BL-5490 LU501939 measuring assembly 2 in series on an NPR anchor cable 1 has the advantages of point domain monitoring.
Claims (10)
1. A device for active measurement of cross-fault interface Newton force in a shale gas mining process, characterized in that the measuring device comprises an NPR anchor cable and at least one pair of measuring assemblies symmetrically sleeved on the NPR anchor cable, the measuring assemblies comprise: a platform mechanism, a through hole is arranged in the vertical direction of the platform mechanism, and a hole is arranged on the side wall of the platform mechanism; an extrusion mechanism, one side of the extrusion mechanism 1s fixedly connected with an elastic unit, the extrusion mechanism is detachably connected to both sides of the platform mechanism through the elastic unit and the hole, and the other side of the extrusion mechanism is provided with friction parts with uneven surface; a constant resistance mechanism comprises an NPR constant resistance body and a sleeve; a chuck with a through hole is fixedly arranged in the middle of the sleeve, the NPR constant resistance body is movably connected to the sleeve above the chuck, the NPR anchor cable passes through the NPR constant resistance body and anchors with the NPR constant resistance body, and the constant resistance mechanism is fixedly
BL-5490 LU501939 connected inside the through hole of the platform mechanism through the sleeve; a sensing mechanism, the sensing mechanism is fixedly sleeved outside the sleeve under the chuck; the platform mechanism is fixedly sleeved outside the sleeve through the through hole, the platform mechanism 1s located below the sensing mechanism, and the sensing mechanism is located between the chuck and the platform mechanism.
2. The device for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 1, characterized in that one side of the extrusion mechanism is provided with a protrusion, and the protrusion is fixedly connected with an elastic unit.
3. The device for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 2, characterized in that the extrusion mechanism is provided with two, the left wall of the platform mechanism 1s provided with a first hole, and the right wall of the platform mechanism is provided with a second hole, the two extrusion mechanisms are detachably connected with the first hole and the second hole respectively through the elastic unit.
BL-5490 LU501939
4. The device for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 3, characterized in that the protrusion matches the inner diameter of the first hole or the second hole, and the length of the protrusion is less than the inner length of the first hole or the second hole.
5. The device for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 3, characterized in that the protrusion is inserted into the first hole or the second hole, and the free end of the elastic unit is located at the hole tail of the first hole or the second hole.
6. The device for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 1, characterized in that the friction part is burr-shaped.
7. The device for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 1, characterized in that the elastic unit is a spring or a rubber.
8. A method for active measurement of cross-fault interface Newton force in a shale gas mining process, the steps are as follows:
BL-5490 LU501939 S1, drilling on the rock, which runs through both sides of the cross- fault interface; S2, inserting the measuring device into the borehole, and the measuring assemblies symmetrically sleeved on the NPR anchor cable are arranged on both sides of the rock cross-fault interface respectively, the sensing mechanism in the measuring device detects the key parameters affecting the fault stability caused by the sliding of the active fault in real time.
9. The method for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 8, characterized in that the measuring device is the active measuring device for Newton force across the fault interface in the process of shale gas exploitation according to any one of the claim 1 to 7.
10. The method for active measurement of cross-fault interface Newton force in a shale gas mining process according to claim 8, characterized in that the key parameter is Newton force.
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| CN202110456147.1A CN113187471B (en) | 2021-04-26 | 2021-04-26 | Active measurement device and method for Newton force crossing fault interface in shale gas exploitation process |
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| CN113187471B (en) * | 2021-04-26 | 2023-06-06 | 中国矿业大学(北京) | Active measurement device and method for Newton force crossing fault interface in shale gas exploitation process |
| CN117889791B (en) * | 2024-03-13 | 2024-05-10 | 中国矿业大学(北京) | Underground engineering fault slip monitoring system and control method |
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| JP5448974B2 (en) * | 2010-03-31 | 2014-03-19 | 株式会社フジタ | Ground displacement detection device |
| CN101887624B (en) * | 2010-07-21 | 2012-09-26 | 中国矿业大学(北京) | Method and system for advanced early warning and forecasting of earthquake disasters |
| CN104853822A (en) * | 2014-09-19 | 2015-08-19 | 杨顺伟 | Method for evaluating shale gas reservoir and searching sweet spot region |
| CN105807311A (en) * | 2016-03-14 | 2016-07-27 | 中国矿业大学(北京) | Earthquake monitoring and early-warning system and method |
| CN209083305U (en) * | 2018-07-04 | 2019-07-09 | 贵州航母矿山设备制造有限公司 | A kind of strengthening mechanism of Mine anchorage cable |
| CN208619139U (en) * | 2018-07-16 | 2019-03-19 | 江西万达矿山设备有限责任公司 | A kind of multifunction mine anchor shaft anchor cable |
| CN211623459U (en) * | 2019-12-23 | 2020-10-02 | 陈贵云 | Novel mining anchor rope |
| CN111456784B (en) * | 2020-04-20 | 2021-01-08 | 北京中矿创新联盟能源环境科学研究院 | Constant-resistance anchor cable structure and anchoring method |
| CN111441826B (en) * | 2020-05-18 | 2021-03-30 | 中山大学 | Deep rock mass zone cracking monitoring device and method |
| CN111721457A (en) * | 2020-06-22 | 2020-09-29 | 中国矿业大学(北京) | Method for monitoring sliding surface shearing force and burial depth in tunnel deeply buried across sliding mass |
| CN111894565B (en) * | 2020-07-14 | 2024-03-22 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
| CN112302060B (en) * | 2020-09-16 | 2022-03-29 | 中国矿业大学(北京) | Mechanical sensor assembly and NPR anchor cable multistage self-aligning ball head core penetrating device |
| CN112228131A (en) * | 2020-09-17 | 2021-01-15 | 中国矿业大学(北京) | Cross-section tunnel flexible isolation structure and engineering rock mass large deformation disaster control method |
| CN112228132A (en) * | 2020-09-17 | 2021-01-15 | 中国矿业大学(北京) | Flexible isolation structure of cross-section tunnel and rock mass large deformation control method |
| CN113187471B (en) * | 2021-04-26 | 2023-06-06 | 中国矿业大学(北京) | Active measurement device and method for Newton force crossing fault interface in shale gas exploitation process |
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| CN113187471A (en) | 2021-07-30 |
| WO2022057947A1 (en) | 2022-03-24 |
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