CN106968706A - A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving - Google Patents
A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving Download PDFInfo
- Publication number
- CN106968706A CN106968706A CN201710372915.9A CN201710372915A CN106968706A CN 106968706 A CN106968706 A CN 106968706A CN 201710372915 A CN201710372915 A CN 201710372915A CN 106968706 A CN106968706 A CN 106968706A
- Authority
- CN
- China
- Prior art keywords
- coal
- slot
- gas
- slotted liner
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000005553 drilling Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 6
- 239000003818 cinder Substances 0.000 claims description 23
- 238000000605 extraction Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 5
- 241000628997 Flos Species 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 4
- 230000008033 biological extinction Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 48
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Pipeline Systems (AREA)
Abstract
A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving, is related to the method for eliminating coal mine gas disaster, and the existing construction workload for eliminating coal and gas prominent of solution is big, the technical problem of time length.The present invention step be：Drilled first in the development end construction level of heading, the water-supply-pipe of high pressure can be being born along drilling to put in using special hydraulic slotted liner technique equipment, until the bottom hole of drilling.High-pressure water pipe one end install can horizontal-jet high-pressure water jet ejector.One side rollback Steel Tube Special, while using high pressure jer cutting drilling, making coal seam pressure relief, anti-reflection.The present invention is used for subterranean coal tunnelling, and the advantage of heading driving speed is accelerated in the danger with the coal and gas prominent that can quickly eliminate coal seam.
Description
Technical field
The present invention relates to the solution of coal mine gas disaster, disappear during more particularly to a kind of subterranean coal tunnelling
Except the method for coal and gas prominent.
Background technology
Coal and gas prominent is the great gas accident of harmfulness in colliery.Subterranean coal is due to by its superstratum
Pressure, the state in three-dimensional compression.Substantial amounts of methane and other a small amount of gases are produced during coal formation, is pressed
Contracting, and be stored in the micro-pore in coal, these mixed gas are referred to as gas.In coal seam during digging laneway, tunnel week
Enclose and driving face (also known as face) forms very high stress concentration.During digging laneway, while driving, while to lane
Supporting is carried out around road.But the driving face in tunnel will be tunneled, it is impossible to supporting.When the low intensity or crustal stress of coal
When big or gas pressure is big, the coal seam of roadway head will be deformed into tunnel.When deforming serious, working face
The coal body in front loses enabling capabilities, pours into tunnel, forms coal and gas prominent accident.
Solving the method for coal and gas prominent at present has：1) constructed in coal seam intensive drilling, these drillings can be arranged
Except a part of gas in coal, the pressure of gas in coal is reduced；After drilling deformation, coal seam can be made to discharge a part of deformation energy, drop
This change is referred to as coal seam pressure relief by the internal stress in low coal seam, colliery.The shortcoming of this method is that the drilling hole amount of construction is more.2)
Hydraulic flushing in hole is carried out in coal seam, effect is also discharge part gas, and makes coal seam pressure relief.The shortcoming of this method is waterpower punching
The hole that hole is formed is big.3) constructed in coal seam a number of firedamp taking-out discharging drilling, utilize watt in these borehole discharging coals
This, on the one hand can reduce the pressure of gas in coal, and after another aspect gas is discharged, coal shrinks deformation, can also reach coal
The purpose of layer release.The shortcoming of this method is that the time of gas drainage under suction is long.
The content of the invention
It is an object of the invention to overcome the shortcoming of prior art to be eliminated there is provided a kind of hydraulic slotted liner technique in heading driving
The method of coal and gas prominent, solves the existing work progress for eliminating coal and gas prominent, workload is big, the technology of time length is asked
Topic.
The present invention is achieved through the following technical solutions：
A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving, its step is as follows：
1. drill：According to coal seam environment and gateway driving face actual conditions, the design spacing of wells and height, drilling construction with
Common extraction drilling is identical；
2. sealing of hole：Using the flanged (FLGD) hole sealing tube sealing of hole in one end；
3. air-water-cinder separator is arranged on hole sealing tube, and in air-water-connect between cinder separator and negative tube
Connect tailrace and pipeline flowmeter；
4. hydraulic slotted liner technique is carried out using high-pressure hydraulic slot equipment, water under high pressure drilling rod is stretched into bottom hole first, then on one side
Negative pressure extraction is carried out to slot hole during rollback, one side slot, slot, prevents gas from pouring in tunnel；
5. aid in that negative pressure extraction must be carried out to slot hole during extraction, slot, prevent gas from pouring in tunnel；
6. after the completion of slot, drilling is connected into negative tube, normal extraction is carried out, during extraction, gas flow is carried out
Detection and measurement, evaluate gas drainage results；
7. coal seam is sampled after slot, be measured according to coal seam protrusion-dispelling index, evaluate extinction effect.
Further, step 1. in, aperture 60mm~90mm, the hole depth 80m~200m of the drilling.
Further, step 2. in, depth 6m~20m of the sealing of hole, sealing material select polyurethane material or cement.
Further, step 3. in, the steam vent of the air-water-cinder separator connects the tailrace, the pipeline stream
Gauge is connected between the tailrace and the negative tube；The air-water-cinder separator bottom floss hole discharge water and
Cinder.
Further, step 4. in, the carry out hydraulic slotted liner technique, slot direction is " anyhow combine ", and all drillings are away from aperture
Neither slot in the range of 10m~20m.
Further, step 4. in, the carry out hydraulic slotted liner technique, using to stacks formula high-pressure hydraulic slot equipment, it is penetrated
Flowing pressure 30MPa~60MPa.
The present invention compared with prior art, with advantages below and beneficial effect：
Due to shifting to an earlier date complete release to driving coal body by hydraulic turbulence, stress concentration has been inherently eliminated it and has caused
Coal body Instability protrude；The process of slot makes the reduction of coal body burst trend, the reduction of unstability degree equivalent to pumping water into coal；Due to watt
This advanced a large amount of pre- extraction, is greatly lowered coal gas content and pressure, and the reduction of gas interior energy fundamentally eliminates gas
Prominent power.The present invention is used for subterranean coal tunnelling, the danger with the coal and gas prominent that can quickly eliminate coal seam
Danger, accelerates the advantage of heading driving speed.
Fig. 1 is interim hole sealing device figure；
Fig. 2 is air-water-cinder separator and flowmeter and negative tube connection figure；
Fig. 3 is hydraulic slotted liner technique borehole pattern.
Wherein：1-coal bed drilling, 2-hole sealing tube, 3-air-water-cinder separator, 3.1-steam vent, 3.2-discharge
Mouth, 4-negative tube, 5-tailrace, 6-pipeline flowmeter, 7-water under high pressure drilling rod, 8-water and cinder.
Embodiment
Clear, complete description is carried out to technical scheme below in conjunction with drawings and examples.
A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving, its comparison and choice is that certain colliery is single
One is projecting coal bed, and the roadway head of certain in coal seam is arranged along coal seam, rectangular cross section, tunnel clear span 5.2m, clear height 3.4m (ginsengs
See Fig. 3).
As shown in Figure 1, 2, 3, a kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving, its step
It is as follows：
1. drill：Common extraction drilling is identical with constructing, hole depth 80m, aperture φ 90mm, and 1 height of drilling is away from top plate
1.7m, the spacing of wells is 1m；
2. sealing of hole：With flanged (FLGD) sealing of hole of hole sealing tube 2, sealing material selects polyurethane material, hole sealing depth 12m；
3. air-water-cinder separator 3 is arranged on hole sealing tube 2, and air-water-cinder separator 3 and negative tube 4 it
Between connection tailrace 5 and pipeline flowmeter 6；
4. hydraulic slotted liner technique is carried out using high-pressure hydraulic slot equipment, water under high pressure drilling rod 7 is stretched into bottom hole first, then on one side
Retract, one side slot, slot direction is " combining anyhow ", horizontal slot is mainly used in increasing the crack quantity in coal seam, makes coal
Layer original stress release, increases gas permeability of coal seam, and vertical slot is mainly used in increasing extraction scope, shielding tunnel both sides coal body
Gas；
5. negative pressure extraction is carried out to slot hole during slot, prevents gas from pouring in tunnel；
6. after the completion of slot, drilling 1 is connected into negative tube 4, normal extraction is carried out；During extraction, Gas-Flow is carried out
The detection and measurement of amount, evaluate gas drainage results；
7. after slot, coal seam is sampled, is measured according to coal seam protrusion-dispelling index, evaluate extinction effect.
Step 1. in, the aperture of the drilling 1 can also be that 60mm, hole depth can also be 200m.
Step 2. in, the depth of the sealing of hole 1 can also be 6m~20m, and sealing material can also be to select cement.
Step 3. in, the steam vent 3.1 of the air-water-cinder separator 3 connects the tailrace 5, the pipeline flow
Meter 6 is connected between the tailrace 5 and the negative tube 4；The row of floss hole 3.2 of the air-water-bottom of cinder separator 3
Water outlet and cinder 8.
Step 4. in, in order to ensure construction safety, away from neither slot in the range of aperture 10m~20m.
The capital equipment that the present invention is used reaches for high-pressure hydraulic slot equipment, the jet pressure of high-pressure hydraulic slot
30MPa~60MPa.The hydraulic turbulence of the coal and gas prominent of elimination heading driving is used to be cut to stacks formula waterpower
Seam standby, put in along drilling during hydraulic slotted liner technique and can bear the water under high pressure drilling rod 7 of high pressure, until the bottom hole of drilling.Water under high pressure
Drilling rod one end install can horizontal-jet high-pressure water jet ejector.One side rollback water under high pressure drilling rod, while utilizing high-pressure water shot
Cutting drilling is flowed, makes coal seam pressure relief, anti-reflection.
Firedamp taking-out discharging drilling carrying out horizontal existing in coal seam of the invention or vertical joint-cutting；Wherein can by horizontal slot
Increase the crack quantity in coal seam, make coal seam primitive stress release, increase gas permeability of coal seam；Extraction can be increased by vertical slot
Scope, shielding coal seam in gas pouring in digging laneway so that protrusion-dispelling index reaches safe range, reach well prevention with
The effect that control gas is protruded.
It may be sprayed during the hydraulic slotted liner technique of the present invention with gas.To prevent tunnel gas from transfiniting in short-term, slot
It is preceding to need to carry out sealing of hole to drilling.Drilling orifice during slot in slot installs air-water-cinder separator.Water under high pressure drilling rod is worn
Cross separator and enter drilling.During slot, gas and water, cinder are discharged by separator.The connection tailrace of steam vent 3.1 of separator
5, pipeline flowmeter 6 is connected between tailrace and negative tube, reaches the purpose of discharge and metering device in Gas.Water and cinder 8 from
The floss hole 3.2 of separator bottom is discharged.It is also possible to be sprayed by adjusting slot speed control gas.
In the present invention, in order to grasp the gas emission during slot, air-water-cinder point is installed in hole month
From device, and connection tailrace and pipeline flowmeter between separator and negative pressure of suction pipe.Tailrace effectively prevents device in Gas
The a small amount of cinder and water carried enters negative pressure system.Flowmeter can measure the flow and gas density of gas mixed gas.Root
According to the slot time, it is estimated that the gas emission during slot.
The present invention can be embodied without departing from the scope of the present invention in a variety of forms, it will be appreciated that above-described embodiment
Foregoing details is not limited to, and should widely be explained in claim limited range.It should be pointed out that being led for this technology
For the those of ordinary skill in domain, without departing from the structure of the invention, the improvement and change made also should be regarded as this hair
Bright protection domain.
Claims (6)
1. a kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving, its step is as follows：
1. drill：According to coal seam environment and gateway driving face actual conditions, design drilling (1) spacing and height, drilling construction with
Common extraction drilling is identical；
2. sealing of hole：Using one end flanged (FLGD) hole sealing tube (2) sealing of hole；
3. air-water-cinder separator (3) is arranged on hole sealing tube, and between air-water-cinder separator and negative tube (4)
Connect tailrace (5) and pipeline flowmeter (6)；
4. hydraulic slotted liner technique is carried out using high-pressure hydraulic slot equipment, water under high pressure drilling rod (7) is stretched into bottom hole first, then while returning
Move back, one side slot, negative pressure extraction is carried out to slot hole during slot, prevents gas from pouring in tunnel；
5. aid in that negative pressure extraction must be carried out to slot hole during extraction, slot, prevent gas from pouring in tunnel；
6. after the completion of slot, drilling is connected into negative tube, normal extraction is carried out, during extraction, the inspection of gas flow is carried out
Survey and measurement, evaluation gas drainage results；
7. coal seam is sampled after slot, be measured according to coal seam protrusion-dispelling index, evaluate extinction effect.
2. hydraulic slotted liner technique according to claim 1 eliminates the method for coal and gas prominent in heading driving, its feature
It is：Step 1. in, it is described drilling (1) 60~90mm of aperture, 80~200m of hole depth.
3. hydraulic slotted liner technique according to claim 1 eliminates the method for coal and gas prominent in heading driving, its feature
It is：Step 2. in, depth 6m~20m of the sealing of hole, sealing material select polyurethane material or cement.
4. hydraulic slotted liner technique according to claim 1 eliminates the method for coal and gas prominent in heading driving, its feature
It is：Step 3. in, the steam vent (3.1) of the air-water-cinder separator (3) connects the tailrace (5), the pipeline
Flowmeter (6) is connected between the tailrace (5) and the negative tube (4)；The air-water-cinder separator (3) bottom
Floss hole (3.2) discharges water and cinder (8).
5. hydraulic slotted liner technique according to claim 1 eliminates the method for coal and gas prominent in heading driving, its feature
It is：Step 4. in, the carry out hydraulic slotted liner technique, slot direction is " anyhow combine ", and all drillings are away from aperture 10m~20m models
Enclose interior neither slot.
6. the method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving according to claim 1 or 5, it is special
Levy and be：Step 4. in, the carry out hydraulic slotted liner technique, using to stacks formula high-pressure hydraulic slot equipment, its jet pressure
30MPa~60MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372915.9A CN106968706A (en) | 2017-05-24 | 2017-05-24 | A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372915.9A CN106968706A (en) | 2017-05-24 | 2017-05-24 | A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106968706A true CN106968706A (en) | 2017-07-21 |
Family
ID=59326993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710372915.9A Pending CN106968706A (en) | 2017-05-24 | 2017-05-24 | A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106968706A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956505A (en) * | 2017-10-18 | 2018-04-24 | 西安交通大学 | Coal mine down-hole drilling anti-reflection method based on controllable shock wave technology |
| CN110761770A (en) * | 2019-12-04 | 2020-02-07 | 西安科技大学 | Novel mine slag-water-gas three-phase separation device |
| CN113446010A (en) * | 2021-07-12 | 2021-09-28 | 中国平煤神马能源化工集团有限责任公司 | High-stress coal seam branch-injection and discharge integrated comprehensive treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223997A (en) * | 2016-09-21 | 2016-12-14 | 中国矿业大学 | A kind of projecting coal bed boring of high methane and waterpower blanking blowout prevention outburst prevention device and method |
-
2017
- 2017-05-24 CN CN201710372915.9A patent/CN106968706A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223997A (en) * | 2016-09-21 | 2016-12-14 | 中国矿业大学 | A kind of projecting coal bed boring of high methane and waterpower blanking blowout prevention outburst prevention device and method |
Non-Patent Citations (1)
| Title |
|---|
| 张希宇: "水力割缝防止掘进工作面瓦斯突出的机理研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956505A (en) * | 2017-10-18 | 2018-04-24 | 西安交通大学 | Coal mine down-hole drilling anti-reflection method based on controllable shock wave technology |
| CN110761770A (en) * | 2019-12-04 | 2020-02-07 | 西安科技大学 | Novel mine slag-water-gas three-phase separation device |
| CN113446010A (en) * | 2021-07-12 | 2021-09-28 | 中国平煤神马能源化工集团有限责任公司 | High-stress coal seam branch-injection and discharge integrated comprehensive treatment method |
| CN113446010B (en) * | 2021-07-12 | 2022-09-16 | 中国平煤神马能源化工集团有限责任公司 | High-stress coal seam branch-injection and discharge integrated comprehensive treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102619552B (en) | Directional hydraulic pressing penetration, permeability increase and outburst elimination method of guide groove | |
| CN108643877A (en) | Coal mine underground coal seam long drilling staged fracturing permeability-increasing and gas extraction method | |
| CN105422164A (en) | Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam | |
| CN107916953A (en) | Gas drainage system, pumping method and construction technology based on roof horizontal drilling | |
| CN102155254A (en) | Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection | |
| CN102182499A (en) | Hydrofracturing-based method and equipment for diminishing dust and eliminating outburst of coal bed | |
| CN103195468A (en) | System process for conducting efficient strengthened extraction in surrounding rock | |
| CN105507938A (en) | Construction method of hydraulic flushing and presplit blasting combined permeability-increasing extraction system in drill holes | |
| CN106968706A (en) | A kind of method that hydraulic slotted liner technique eliminates coal and gas prominent in heading driving | |
| CN104295263A (en) | Radial hole sealing device for drill holes for exhausting coal bed gas | |
| CN203452801U (en) | Sectional pulse grouting system for tunnel construction | |
| CN108086945A (en) | A kind of layer-through drilling separate type whole process gas drainage hole sealing device and its method for sealing | |
| CN214247322U (en) | Orifice hydraulic device for preventing high-pressure push rod from spraying | |
| CN113217043A (en) | Efficient and rapid plugging method and construction method for water source with water inrush fault water guide zone | |
| CN204327172U (en) | Formula boring goaf extraction structure before and after high-rise position | |
| CN203547562U (en) | Integrated drilling and cutting drill stem | |
| CN106968664A (en) | A kind of floor undulation destruction band deep drilling water filling detection method | |
| CN103161402B (en) | Coal seam high-pressure hydraulic concordant is bored and is cut pressure relief method | |
| CN202883008U (en) | Water drainage detection hole controller | |
| CN111456802A (en) | Highway tunnel coal seam coal uncovering outburst prevention construction method | |
| CN114278372B (en) | Diversion arrangement method for underground directional drilling area of huge thick water-rich layer | |
| CN109236352A (en) | A kind of region anti-burst method of explosion hydraulic fracturing integration gas displacement | |
| CN114738011A (en) | Method for plugging old water inrush point of mine | |
| CN111828082B (en) | Coal bed permeability increasing method with cooperation of chemical extraction and liquid explosive | |
| CN108708694A (en) | The high-pressure gas-liquid microvesicle anti-reflection method of low air permeability coal seam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170721 |