CN106837308A - A kind of gas tunnel pressure tester and its method - Google Patents
A kind of gas tunnel pressure tester and its method Download PDFInfo
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- CN106837308A CN106837308A CN201710199119.XA CN201710199119A CN106837308A CN 106837308 A CN106837308 A CN 106837308A CN 201710199119 A CN201710199119 A CN 201710199119A CN 106837308 A CN106837308 A CN 106837308A
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- 238000000034 method Methods 0.000 title abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 84
- 239000002002 slurry Substances 0.000 claims abstract description 51
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 23
- 239000011083 cement mortar Substances 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 229920002472 Starch Polymers 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 235000019698 starch Nutrition 0.000 claims abstract description 9
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000007569 slipcasting Methods 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 8
- 230000008961 swelling Effects 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000005065 mining Methods 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 231100000241 scar Toxicity 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 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
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
Landscapes
- 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)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of gas tunnel pressure tester and its method, belong to gas tunnel technical field of construction.Including pressure-measuring pipe, hole sealing device, grouting pump, Grouting Pipe and pressure gauge, hole sealing device includes that sealing of hole starches pouch, sealing of hole slurry pouch is enclosed within pressure-measuring pipe and two ends binding strap colligation is firm, the front end of sealing of hole slurry pouch is provided with Grouting Pipe and blast pipe, and its front and rear both sides is each provided with a rubber stop grouting plug；Grouting Pipe connects grouting pump；The pressure-measuring pipe front port is connected with three-way connection, three-way connection one end connection pressure gauge, other end connection fluid injection inspection pump.The present invention is simple and reliable for structure, reasonable in design, and constructing operation is easy, efficiency of construction is high, pressure measurement speed is fast, and pressure measurement is accurate, and sealing of hole slurry pouch is in unsaturated state to the pressure testing method when mounted, it is easily installed pressure-measuring pipe, sealing of hole slurries are enclosed in pouch, sealing of hole effect is good, and cement mortar does not expose, reduce cement mortar waste, reduces cost.
Description
Technical field
The present invention relates to gas tunnel technical field of construction.
Background technology
Coal-bed gas pressure is coal seam coal gas dynamics and most basic parameter of gushing out, and is also one of power of Coal Outburst,
Accurate Determining coal-bed gas pressure to effective and reasonable specified Firedamp precaution measures, prediction Gas Outburst danger, with weight
Want meaning.When needing to pass through gas stratum during constructing tunnel, to prevent Gas Outburst from triggering disaster influence construction, it is necessary to right
Gas carries out the indexs such as advanced high-lighting prediction, detection gas strata pressure, and conventional method is using advanced inspecting hole, to prevent
Pressure release, installs pressure-measuring pipe in inspecting hole, and injection hole sealing is used between inspecting hole and pressure-measuring pipe, typically using yellow mud+cement, sealing
Liquid, slip casting etc..Sealing quality is to ensure that the key factor of drilling Accurate Determining coal-bed gas pressure, what this kind of pressure measurement mode was present
Problem：（1）Due to the complexity of tunnel surrounding, inspecting hole is in irregular shape, and using rubber stop grouting plug, sealing effectiveness is not good, press-in
Cement mortar can by rubber stop grouting plug block pressure-measuring pipe；（2）Cannot accurate sealing of hole mortar length, it is impossible to determine whether to meet phase
Pass standard requirement；（3）Because inspecting hole has air pressure, the too small press-in cement mortar of grouting pressure is unable to quick blocking, grouting pressure mistake
Conference is moved before promoting pressure-measuring pipe；（4）Stop grouting plug easily causes damage in installation process with hole wall friction, when stop grouting plug is excessive
Install cumbersome.
The content of the invention
The technical problem to be solved in the present invention is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of gas tunnel pressure measurement dress
Put and its method, the pressure tester is simple and reliable for structure, reasonable in design, constructing operation is easy, efficiency of construction is high, pressure measurement speed
Hurry up, pressure measurement is accurate, sealing of hole slurry pouch is in unsaturated state to the pressure testing method when mounted, it is easy to pressure-measuring pipe is installed, by sealing of hole
Slurries are enclosed in pouch, and sealing of hole effect is good, and cement mortar does not expose, and reduce cement mortar waste, reduces cost.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of gas tunnel pressure testing method,
（1）According to advance geologic prediction data, close at gas formation tunnel face without artificial mining influence
Scar digs an a diameter of 75mm using hidden hole drilling, and hole depth is not less than 15m and gos deep into pressure tap of the coal seam not less than 5m；
（2）Sealing of hole slurry pouch is inserted on pressure-measuring pipe, its interior diameter is 1.5~2.5 times of pressure measurement bore dia, its two ends colligation
Firmly, with mortar leakage prevention, a rubber stop grouting plug is respectively installed in the forward and backward side of pressure-measuring pipe for band colligation；
（3）After pressure measuring drill hole construction terminates, by the predetermined hole sealing depth in pressure tap of pressure-measuring pipe, and slip casting is installed
Pipe, pressure-measuring pipe will expose certain length after installing；
（4）A certain proportion of swelling agent and airtight dose are added in cement mortar, by the ratio of mud 2:1, swelling agent be 12%, airtight dose
It is 8% proportional arrangement sealing of hole slurries, is continuously injected in sealing of hole slurry pouch cement mortar with grouting pump is disposable, until slip casting pressure
Power reaches 0.5MPa, and holds pressure 5 minutes, and gas is excluded by blast pipe in sealing of hole slurry pouch, fully ensures in sealing of hole slurry pouch
The density of sealing of hole slurries, aperture is blocked with accelerator after the completion of slip casting；
（5）Pressure-measuring pipe is detected using fluid injection inspection pump, it is ensured that pressure-measuring pipe is unobstructed；
（6）Sealing of hole slurries install pressure gauge after being solidified through 24h, observation, the change of record tabular value, record to reading tend towards stability,
And untill 5~7d of gauge pressure value stabilization, such as gas pressure change is less than 0.005MPa/d, and pressure measurement work can terminate.
A kind of gas tunnel pressure tester, including pressure-measuring pipe, hole sealing device, grouting pump, Grouting Pipe and pressure gauge, sealing of hole dress
Put and starch pouch including sealing of hole, sealing of hole slurry pouch is enclosed within pressure-measuring pipe and two ends binding strap colligation is firm, before sealing of hole slurry pouch
End is provided with Grouting Pipe and blast pipe, and its front and rear both sides is each provided with a rubber stop grouting plug；Grouting Pipe connects grouting pump；It is described
Pressure-measuring pipe front port is connected with three-way connection, three-way connection one end connection pressure gauge, other end connection fluid injection inspection pump.
Preferably, the material of the sealing of hole slurry pouch is geotextiles.
Preferably, the sealing of hole slurry pouch effective length is 10~20m.
Preferably, the binding strap is tied silk or rope.
Preferably, the pressure-measuring pipe is formed by connecting using the iron pipe thread of a diameter of 15mm, inlet end is provided with sieve aperture
Pipe, is provided with air admission hole.
Preferably, the pressure-measuring pipe protruded length is 150~350mm.
Preferably, the manometric range is 1.5 times of estimated coal-bed gas pressure.
Preferably, the sealing of hole slurry pouch is cylindrical shape.
Preferably, the sealing of hole slurry pouch can bear to be not less than the pressure of 2MPa.
It is using the beneficial effect produced by above-mentioned technical proposal：The present invention provide a kind of gas tunnel pressure tester and
Its method, the pressure tester is simple and reliable for structure, reasonable in design, and constructing operation is easy, and efficiency of construction is high, and pressure measurement speed is fast, surveys
Pressure is accurate, and sealing of hole slurry pouch is in unsaturated state to pressure testing method of the invention when mounted, it is easy to pressure-measuring pipe is installed, by sealing of hole
Slurries are enclosed in pouch, and sealing of hole effect is good, and cement mortar does not expose, and reduce cement mortar waste, and reduces cost can make slip casting material
Material is uniformly filled in whole space and sealing material and is combined closely with borehole wall, realizes the sealing along coal bed drilling, it is to avoid because close
Envelope property difference causes cement mortar to permeate, and prevents the cement mortar of infiltration from blocking pressure-measuring pipe air admission hole, so as to improve gas pressure measurement
Success rate and accuracy, make the gas pressure value measured closer to the real gas pressure in coal seam, and Gas Outburst can be carried out
Effectively prediction, improves the sealing of pressure measurement, improves pressure measurement operating efficiency, there is widely promotion prospect.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
In figure：1st, pressure-measuring pipe；2nd, rubber stop grouting plug；3rd, binding strap；4th, blast pipe；5th, sealing of hole slurry pouch；6th, Grouting Pipe；7th, slip casting
Pump；8th, pressure gauge；9th, three-way connection；10th, fluid injection inspection pump；11st, coal seam；12nd, antipriming pipe；13rd, air admission hole.
Specific embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Embodiment 1
A kind of gas tunnel pressure testing method,
（1）According to advance geologic prediction data, close at gas formation tunnel face without artificial mining influence
Scar digs an a diameter of 75mm using hidden hole drilling, and hole depth is not less than 15m and gos deep into pressure tap of the coal seam not less than 5m；
（2）Sealing of hole slurry pouch 5 is inserted on pressure-measuring pipe 1, its interior diameter is 1.5~2.5 times of pressure measurement bore dia, its two ends is with tying up
Firmly, with mortar leakage prevention, a rubber stop grouting plug 2 is respectively installed in the forward and backward side of pressure-measuring pipe 1 to the colligation of band 3；
（3）After pressure measuring drill hole construction terminates, by the predetermined hole sealing depth in pressure tap of pressure-measuring pipe 1, and slip casting is installed
Pipe 6, pressure-measuring pipe 1 will expose certain length after installing；
（4）A certain proportion of swelling agent and airtight dose are added in cement mortar, by the ratio of mud 2:1, swelling agent be 12%, airtight dose
It is 8% proportional arrangement sealing of hole slurries, is continuously injected in sealing of hole slurry pouch 5 cement mortar with grouting pump 7 is disposable, until slip casting
Pressure reaches 0.5MPa, and holds pressure 5 minutes, and gas is excluded by blast pipe 4 in sealing of hole slurry pouch 5, fully ensures sealing of hole slurry capsule
The density of 5 inner sealing of hole slurries of bag, aperture is blocked with accelerator after the completion of slip casting；
（5）Pressure-measuring pipe 1 is detected using fluid injection inspection pump 10, it is ensured that pressure-measuring pipe 1 is unobstructed；
（6）Sealing of hole slurries install pressure gauge 8 after being solidified through 24h, observation, the change of record tabular value, record to reading tend towards stability,
And untill 5~7d of gauge pressure value stabilization, such as gas pressure change is less than 0.005MPa/d, and pressure measurement work can terminate.
A kind of gas tunnel pressure tester, including pressure-measuring pipe 1, hole sealing device, grouting pump 7, Grouting Pipe 6 and pressure gauge 8, survey
Pressure pipe 1 is formed by connecting using the iron pipe thread of a diameter of 15mm, and inlet end is provided with antipriming pipe 12, is provided with air admission hole
13；Hole sealing device includes the cylindrical shape sealing of hole slurry pouch 5 being made of geotextiles, and the effective length of sealing of hole slurry pouch 5 is 15m, its
It is enclosed within pressure-measuring pipe 1 and the colligation of two ends binding strap 3 is firm, the front end of sealing of hole slurry pouch 5 is provided with Grouting Pipe 6 and blast pipe 4,
Its front and rear both sides is each provided with a rubber stop grouting plug 2；Grouting Pipe 6 connects grouting pump 7；The front port of pressure-measuring pipe 1 is connected with threeway
Joint 9, the one end of three-way connection 9 connection pressure gauge 8, other end connection fluid injection inspection pump 10.
When pressure measurement works, first in the scar without artificial mining influence close at gas formation tunnel face
One a diameter of 75mm is dug using hidden hole drilling, hole depth is not less than 15m and gos deep into pressure tap of the coal seam not less than 5m, pressure measuring drill hole
After construction terminates, active pressure-measuring pipe 1 is installed into hole sealing depth predetermined in the borehole, and install Grouting Pipe 6, pressure-measuring pipe 1
Front and back ends respectively install a rubber stop grouting plug 2, and the effect of rubber stop grouting plug 2 is positioning pressure-measuring pipe and prevents sealing of hole slurry pouch 5 from breaking
Damage causes closure slurry plugs air admission hole 13, by the predetermined hole sealing depth in pressure tap of pressure-measuring pipe 1, in order to prevent cement
Because shrinking generation crack after slurry solidification, according to hole sealing depth, a certain proportion of swelling agent and airtight dose are added in cement mortar, pressed
The ratio of mud 2:1, swelling agent 12% and airtight dose 8% of proportional arrangement sealing of hole slurries are disposably continuously noted cement mortar with grouting pump 7
Enter in sealing of hole slurry pouch 5, until grouting pressure reaches 0.5MPa, and continue 5 minutes, the gas in sealing of hole slurry pouch 5 is by row
Tracheae 4 is discharged, and fully ensures that the density of the sealing of hole slurries in sealing of hole slurry pouch 5, and aperture is blocked with accelerator after the completion of slip casting,
Pressure-measuring pipe 1 is detected using fluid injection inspection pump 10, it is ensured that pressure-measuring pipe 1 is unobstructed；Sealing of hole slurries install pressure after being solidified through 24h
Table 8, observation, the change of record tabular value, record to reading tends towards stability, and untill 5~7d of gauge pressure value stabilization, such as gas pressure
Power change is less than 0.005MPa/d, and pressure measurement work can terminate.
The present invention provides a kind of gas tunnel pressure tester and its method, and the pressure tester is simple and reliable for structure, and design is closed
Reason, constructing operation is easy, and efficiency of construction is high, and pressure measurement speed is fast, and pressure measurement is accurate, and pressure testing method of the invention when mounted starch by sealing of hole
Pouch is in unsaturated state, it is easy to install pressure-measuring pipe, sealing of hole slurries are enclosed in pouch, sealing of hole effect is good, cement mortar is not
Expose, reduce cement mortar waste, reduces cost can make injecting paste material be uniformly filled in whole space and sealing material and drilling hole
Wall is combined closely, and will not block air admission hole, realizes the sealing along coal bed drilling, it is to avoid cement mortar permeates caused by sealing difference,
Prevent the cement mortar of infiltration from blocking pressure-measuring pipe air admission hole, so as to improve the success rate and accuracy of gas pressure measurement, make to measure
Gas pressure value closer to the real gas pressure in coal seam, Gas Outburst can effectively be predicted, improve pressure measurement it is close
Feng Xing, improves pressure measurement operating efficiency, there is widely promotion prospect.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention,
Various modifications to the present embodiment will be apparent for those skilled in the art, those skilled in the art's root
Go out the product of other structures according to principle design of the invention, belong to protection scope of the present invention, the present invention will not be limited
In embodiment illustrated herein, and it is to fit to the most wide scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. a kind of gas tunnel pressure testing method, it is characterised in that：
（1）According to advance geologic prediction data, close at gas formation tunnel face without artificial mining influence
Scar digs an a diameter of 75mm using hidden hole drilling, and hole depth is not less than 15m and gos deep into pressure tap of the coal seam not less than 5m；
（2）In pressure-measuring pipe（1）On be inserted in sealing of hole slurry pouch（5）, its interior diameter is 1.5~2.5 times of pressure measurement bore dia, its two ends
Use binding strap（3）Colligation is firm, with mortar leakage prevention, pressure-measuring pipe（1）Forward and backward side is respectively installed by one rubber stop grouting plug（2）；
（3）After pressure measuring drill hole construction terminates, by pressure-measuring pipe（1）The predetermined hole sealing depth in pressure tap, and install note
Slurry pipe（6）, pressure-measuring pipe（1）Certain length is exposed after installing；
（4）A certain proportion of swelling agent and airtight dose are added in cement mortar, by the ratio of mud 2:1, swelling agent be 12%, airtight dose
It is 8% proportional arrangement sealing of hole slurries, it is disposable continuous by cement mortar injection sealing of hole slurry pouch with grouting pump（5）It is interior, until slip casting
Pressure reaches 0.5MPa, and holds pressure 5 minutes, sealing of hole slurry pouch（5）Interior gas passes through blast pipe（4）Exclude, fully ensure sealing of hole
Slurry pouch（5）In sealing of hole slurries density, aperture is blocked with accelerator after the completion of slip casting；
（5）Pump is checked using fluid injection（10）To pressure-measuring pipe（1）Detected, it is ensured that pressure-measuring pipe（1）It is unobstructed；
（6）Sealing of hole slurries install pressure gauge after being solidified through 24h（8）, observation, the change of record tabular value are recorded and tend to steady to reading
It is fixed, and untill 5~7d of gauge pressure value stabilization, such as gas pressure change is less than 0.005MPa/d, and pressure measurement work can terminate.
2. a kind of gas tunnel pressure tester for realizing gas tunnel pressure testing method described in claim 1, including pressure-measuring pipe（1）,
Hole sealing device, grouting pump（7）, Grouting Pipe（6）And pressure gauge（8）, it is characterised in that the hole sealing device includes that sealing of hole starches pouch
（5）, sealing of hole slurry pouch（5）It is enclosed within pressure-measuring pipe（1）Upper and two ends binding strap（3）Firmly, sealing of hole starches pouch for colligation（5）Front end
It is provided with Grouting Pipe（6）And blast pipe（4）, its front and rear both sides is each provided with a rubber stop grouting plug（2）；The Grouting Pipe（6）
Connection grouting pump（7）；The pressure-measuring pipe（1）Front port is connected with three-way connection（9）, three-way connection（9）One end connects pressure gauge
（8）, other end connection fluid injection inspection pump（10）.
3. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the sealing of hole starches pouch（5）Material
Matter is geotextiles.
4. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the sealing of hole starches pouch（5）Effectively
Length is 10~20m.
5. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the binding strap（3）For tied silk or
Rope.
6. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the pressure-measuring pipe（1）Using diameter
For the iron pipe thread of 15mm is formed by connecting, inlet end is provided with antipriming pipe（12）, it is provided with air admission hole（13）.
7. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the pressure-measuring pipe（1）Protruded length
It is 150~350mm.
8. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the pressure gauge（8）Range be
1.5 times of estimated coal-bed gas pressure.
9. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the sealing of hole starches pouch（5）It is circle
Tubular.
10. a kind of gas tunnel pressure tester according to claim 2, it is characterised in that the sealing of hole starches pouch（5）Energy
Bear to be not less than the pressure of 2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199119.XA CN106837308B (en) | 2017-03-29 | 2017-03-29 | Gas tunnel pressure measuring device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199119.XA CN106837308B (en) | 2017-03-29 | 2017-03-29 | Gas tunnel pressure measuring device and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106837308A true CN106837308A (en) | 2017-06-13 |
| CN106837308B CN106837308B (en) | 2024-01-12 |
Family
ID=59141769
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710199119.XA Active CN106837308B (en) | 2017-03-29 | 2017-03-29 | Gas tunnel pressure measuring device and method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795315A (en) * | 2017-12-06 | 2018-03-13 | 中煤第建设有限公司 | Determination of coal seam gas pressure device and its method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure |
| CN110159226A (en) * | 2019-06-19 | 2019-08-23 | 贵州盘江精煤股份有限公司 | A kind of gas control provided pipe fast plugging device |
| CN111879477A (en) * | 2020-07-30 | 2020-11-03 | 陕西煤业化工技术研究院有限责任公司 | System and method for inspecting sealing effect of roadway spraying |
| CN112282791A (en) * | 2020-09-16 | 2021-01-29 | 贵州大学 | Quick grouting system for soil body tunnel |
| CN112282790A (en) * | 2020-09-16 | 2021-01-29 | 贵州大学 | Slurry stirring self-injection equipment |
| CN112302568A (en) * | 2019-07-31 | 2021-02-02 | 西安青果新材料科技开发有限公司 | Plugging bag |
| CN113107469A (en) * | 2021-05-06 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Device and method for measuring gas pressure by using underground long drill hole |
| CN113107471A (en) * | 2021-05-14 | 2021-07-13 | 中国矿业大学 | System and method for testing pre-harvest stress distribution characteristics based on capsule pressure change |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795315A (en) * | 2017-12-06 | 2018-03-13 | 中煤第建设有限公司 | Determination of coal seam gas pressure device and its method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure |
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| CN112302568A (en) * | 2019-07-31 | 2021-02-02 | 西安青果新材料科技开发有限公司 | Plugging bag |
| CN111879477A (en) * | 2020-07-30 | 2020-11-03 | 陕西煤业化工技术研究院有限责任公司 | System and method for inspecting sealing effect of roadway spraying |
| CN112282791A (en) * | 2020-09-16 | 2021-01-29 | 贵州大学 | Quick grouting system for soil body tunnel |
| CN112282790A (en) * | 2020-09-16 | 2021-01-29 | 贵州大学 | Slurry stirring self-injection equipment |
| CN113107469A (en) * | 2021-05-06 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Device and method for measuring gas pressure by using underground long drill hole |
| CN113107469B (en) * | 2021-05-06 | 2023-11-17 | 中煤科工集团西安研究院有限公司 | Device and method for measuring gas pressure through underground long drilling |
| CN113107471A (en) * | 2021-05-14 | 2021-07-13 | 中国矿业大学 | System and method for testing pre-harvest stress distribution characteristics based on capsule pressure change |
| CN113107471B (en) * | 2021-05-14 | 2023-02-28 | 中国矿业大学 | System and method for testing stress distribution characteristics before mining based on capsule pressure change |
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