CN106930691B - A kind of drilling construction method in driving along next gob unloading blast hole - Google Patents
A kind of drilling construction method in driving along next gob unloading blast hole Download PDFInfo
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- CN106930691B CN106930691B CN201710273915.3A CN201710273915A CN106930691B CN 106930691 B CN106930691 B CN 106930691B CN 201710273915 A CN201710273915 A CN 201710273915A CN 106930691 B CN106930691 B CN 106930691B
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- 238000005553 drilling Methods 0.000 title claims abstract description 71
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 19
- 238000005065 mining Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 239000002817 coal dust Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 230000002265 prevention Effects 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008093 supporting effect Effects 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
- E21B7/00—Special methods or apparatus for drilling
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a kind of drilling construction methods in driving along next gob unloading blast hole, mainly comprise the following steps：The first step, in the haulage gate of first mining face is not helped by the coal of mining influence, drill hole sampling；Second step, in the drill hole sampling at the height of one lateral extent bottom plate 1.5m of working face of subsequent work face driving along next gob tunnel；Third walks, and distribution of abutment pressure of the driving along next gob tunnel close to working face side is obtained to find out drilling depth and quality of pc numerical value consistent relationship according to two drill hole sampling processes；4th step bores stairstepping pressure relief vent in front of working face with reference to gained distribution of abutment pressure along tunnel to the region for stopping adopting line；5th step continues, in next working face driving along next gob tunnel, to repeat above-mentioned construction procedure, until completion.The present invention, which has, disturbs driving along next gob tunnel the features such as small, release effect is good, and difficulty of construction is small, strong operability, short construction period, and construction cost is low.
Description
Technical field
Control method, more particularly to a kind of driving along next gob tunnel is pressed to unload the present invention relates to a kind of driving along next gob roadway bump
Press hole drill hole construction method.
Background technology
Bump is a kind of mining dynamic phenomena of complexity, be always rock mass mechanics and mine study on prevention difficult point it
One.In progress of coal mining, bump, will lead to the generation of major accident disaster accident once being formed.
According to statistics, 70% or more bump is happened in stope drift active workings, especially in driving along next gob tunnel.
Currently, prevention stope drift active workings bump most efficient method is that pressure relief vent is beaten in the coal body of tunnel, pressure relief vent one
As perpendicular to tunnel coal wall, the small general diameter of pressure relief vent in 100mm hereinafter, large aperture release aperture be 100mm~300mm, bore
Hole depth about 10~30m, 5~10m of spacing need to choose reasonable diameter and spacing according to scene.
The principle of drilling release is by drilling to coal wall, drilling surrounding medium crack being made constantly to extend, and coal body is constantly broken
Bad, the coal body elasticity of compression can constantly discharge, and the lower distressed zone of stress is formed around pressure relief vent.
Fracture area forms large-scale distressed zone after being interconnected around the pressure relief vent, promotes to accumulate in the height near coal wall
Area of stress concentration is shifted to coal body deep, achievees the purpose that the elasticity of compression can be discharged, to play prevention impact ground
The effect of pressure.Studies have shown that release bore dia is bigger, closeer, pressure relief vent surrounding medium crack is more developed, and release effect is better.
Meanwhile pressure relief vent is possible to disturb roadway surrounding rock and destroy, when Theoretical Design and field conduct, must pay attention to,
Especially Deep Mine, the dual danger with bump and large deformation of roadway, needs to take into account.
When pressure relief vent is relatively large in diameter, and spacing is smaller, expected release effect can be reached, but exacerbate roadway damage, lane
Road surrounding rock stability is affected, and country rock roadway deformation is difficult to control.
When release bore dia is too small, when spacing is excessive, release effect unobvious cannot play the mesh of prevention bump
's.
How the scientific and rational construction for carrying out driving along next gob unloading blast hole, with obtain microvariations, it is strong unload can effect
Fruit effectively prevents the formation of bump, and have become those skilled in the art's needs constantly exploration and research one is important
Project.
Invention content
It is an object of the present invention to provide a kind of driving along next gob tunnel micro-disturbance, the pressure relief vent drilling construction method of strong release,
The technical characterstics such as its, strong operability small with difficulty of construction, short construction period, at low cost.
The present invention to achieve the above object, the technical scheme adopted is that a kind of drilling in driving along next gob unloading blast hole
Construction method, which is characterized in that include the following steps：
The first step, in the haulage gate of first mining face, not by the coal of mining influence side in, drilling the sampling holes A several, receive
The drilled out ickings of collection is simultaneously weighed；
Then, the quality of pc of average every meter of drilling depth of each thief hole A is calculated separately out, mark is used as after weighted average
Quasi- value B；
Above-mentioned each thief hole A is equally spaced, and hole depth is 10 meters；
Second step, after waiting for first mining face exploitation, in subsequent work face driving along next gob tunnel close to working face side
At height apart from bottom plate 1.5m, drilling the sampling holes C,
In boring procedure, 1 meter is often crept into, collect the ickings once drilled out and is weighed, the coal of every meter of drilling depth is recorded
Silty amount D；
When finding that drilled out ickings weight no longer changes with the increase of drilling depth, stops boring, obtain thief hole C；
The aperture of above-mentioned thief hole C is equal with the aperture of thief hole A；
Third walks, and each quality of pc D numerical value is compared with above-mentioned standard value B, obtains driving along next gob tunnel close to work
Make the distribution of abutment pressure of face side, i.e.,：
It is high stress elastic region when quality of pc D numerical value is higher than the drilling depth region corresponding to standard value B, is less than standard
Drilling depth region corresponding to value B is low stress plastic zone；
4th step, using automatic reducing borehole-enlarging drilling tool, in front of working face along tunnel to the region for stopping adopting line, equidistantly
Bore a number of pressure relief vent；
The pressure relief vent is stepped hole, interior thick outer thin；The depth of pressure relief vent is more than or equal to above-mentioned high stress elasticity
Drilling depth region corresponding to area；The boring method of pressure relief vent is as follows：
Bit diameter needed for selection, drills, from outside to inside when drilling depth enters above-mentioned high stress elastic region institute
Behind corresponding drilling depth region, the cutter hub pick on automatic reducing borehole-enlarging drilling tool is opened, bit diameter is adjusted to before
3-5 times, turn round reaming from inside to outside since bottom hole；
After turning round the drilling depth region corresponding to reaming to above-mentioned low stress plastic zone, automatic diameter changing reaming is closed
Drilling tool, and the cutter hub pick on automatic reducing borehole-enlarging drilling tool is resetted；Then, automatic reducing borehole-enlarging drilling tool is extracted out to get unloading
Press hole；
5th step continues, in next working face driving along next gob tunnel, to repeat above-mentioned second step to the 4th step, until work
Face full extraction is completed.
The technical effect brought directely by the technical proposal is that using intuitive and simple possible drilling load-bearing, comparing
Method, to determine the depth of release hole drilling, be greatly reduced with substituting the stress monitoring method of the very complicated of the prior art
Pressure relief vent drilling construction difficulty, short construction period and at low cost, also, the pressure relief vent drilling construction method of above-mentioned technical proposal
Operability it is strong, it is simple and practicable.
In above-mentioned technical proposal, the prevention of bump and the requirement of roadway maintenance are considered, according to support pressure
The regularity of distribution pointedly selects the pressure relief vent of stairstepping (low stress area aperture is small, and region of high stress aperture is big).Wherein, low
The aperture of stressed zone is small so that the disturbance of drilling construction process is small, small to surrounding rock failure, is conducive to roadway deformation control；And it is interior
The aperture of portion's region of high stress is big, it is ensured that the release effect of strength.That is, above-mentioned technical proposal, has perturbation very outstanding
The technical characterstic of dynamic, strong release.
In particular, above-mentioned technical proposal, according to distributing discipline of abutment pressure, small small with energy close to coal wall support pressure
Low stress area use small-bore release, reduce its destruction to country rock；It is big in support pressure, far from coal wall the region of high stress into
The strong release in row large aperture so that release is more purposive.
Preferably, the quantity of above-mentioned driving along next gob unloading blast hole drill hole construction method, thief hole A is 3, each to sample
Spacing between the A of hole is 30 meters.
What the optimal technical scheme was directly brought has the technical effect that, our practical experience shows：" the quantity of thief hole A
It is 3, the spacing between each thief hole A is 30 meters ", the benchmark as reference standard is obtained, both the generation with samples taken
Table, and the quantities for down-sampling hole drilling as far as possible can be taken into account, it is conducive to shorten construction period, reduces construction cost.
Further preferably, the spacing between each pressure relief vent is 5~10 meters.
What the optimal technical scheme was directly brought has the technical effect that, our practical experience shows：" between each pressure relief vent
Spacing is 5~10 meters ", on the one hand, generated pressure release effect is the most balanced, effective；On the other hand, release hole density can be appropriate
It reduces, workload is opposite to be reduced.
Further preferably, the aperture of thief hole C and the aperture of thief hole A are 42mm；The thin segment of step-like pressure relief vent
A diameter of 60mm, a diameter of 300mm of thick section.
What the optimal technical scheme was directly brought has the technical effect that, our practical experience shows：" the aperture of thief hole C
Aperture with thief hole A is 42mm；The a diameter of 60mm of thin segment, a diameter of 300mm " of thick section of step-like pressure relief vent, in foot
Except being needed with the prevention pressed with meeting common driving along next gob roadway bump, on the one hand, can be reduced as far as because of release
Negative effect caused by disturbance and stress variation caused by the drilling construction in hole, on the other hand, convenient for conventional drilling tool
Selection uses.
In conclusion the present invention is compared with the existing technology, with to the disturbance of driving along next gob tunnel is small, release effect is good, apply
The advantageous effects such as work difficulty is small, strong operability, short construction period and construction cost are low.
Description of the drawings
The planar structure schematic diagram of the haulage gate of mining face headed by Fig. 1；
Fig. 2 is the planar structure schematic diagram in working face driving along next gob tunnel；
Fig. 3 is the planar structure schematic diagram (after pressure relief vent drilling construction) in working face driving along next gob tunnel.
Reference sign：1, first mining face, 2, first mining face stope drift active workings, 3, first mining face tailgate,
4, thief hole A, 5, thief hole C, 6, subsequent work face haulage way, 7, pressure relief vent.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is described in detail.
Embodiment 1
By taking certain 3201 working face of coal mine as an example, illustrate.
The basic condition of 3201 working faces：Coal mining depth 1110m, coal seam thickness 3.2m have intense impact tendentiousness,
Tunnel is influenced to deform larger by ground pressure.It is then desired in the driving along next gob tunnel of 3201 working faces, the strong release punching of micro-disturbance is carried out
Press pressure relief vent drilling construction with hitting.
The drilling construction in driving along next gob unloading blast hole, carries out as follows：
As shown in Figures 1 to 3, the first step, not by the coal of mining influence side, is drilled through in the haulage gate of first mining face
Sample hole A, collects drilled out ickings and weighs by totally 3；
Then, the quality of pc for calculating separately out average every meter of drilling depth of each thief hole A is：2.45Kg/m、
2.42Kg/m, 2.39Kg/m are as standard value B after weighted average：2.42Kg/m、；
Above-mentioned each thief hole A is equally spaced, and hole depth is 10 meters；
Second step, after waiting for first mining face exploitation, in subsequent work face driving along next gob tunnel close to working face side
At height apart from bottom plate 1.5m, drilling the sampling holes C 5,
In boring procedure, 1 meter is often crept into, collect the ickings once drilled out and is weighed, the coal of every meter of drilling depth is recorded
Silty amount D；
When finding that drilled out ickings weight no longer changes with the increase of drilling depth, stops boring, obtain thief hole C；
The aperture of above-mentioned thief hole C is equal with the aperture of thief hole A；
Third walks, and each quality of pc D numerical value is compared with above-mentioned standard value B, obtains driving along next gob tunnel close to work
Make the distribution of abutment pressure of face side, i.e.,：
When quality of pc D numerical value is high stress higher than the drilling depth region (8 meters to 20 meters sections) corresponding to standard value B
Elastic region, less than the drilling depth region (0 meter to 8 meters section) corresponding to standard value B be low stress plastic zone；
4th step, using the drilling tool for being equipped with automatic diameter changing reaming part between drill bit and drilling rod, along lane in front of working face
In road to the region for stopping adopting line, a number of pressure relief vent is equidistantly bored；
The pressure relief vent is stepped hole, interior thick outer thin；The depth of pressure relief vent is more than or equal to above-mentioned high stress elasticity
Drilling depth region (1 meter to 3 meters) corresponding to area；The boring method of pressure relief vent is as follows：
The hollow drill pipe for selecting a diameter of 42mm, drills from outside to inside, when drilling depth enters above-mentioned high stress bullet
Property area corresponding to drilling depth region after, open automatic reducing borehole-enlarging drilling tool on cutter hub pick, by bit diameter adjust to
Before 3-5 times, turn round reaming from inside to outside since bottom hole；
After turning round the drilling depth region corresponding to reaming to above-mentioned low stress plastic zone, closes automatic diameter changing and expand
Hole drill tool, and the cutter hub pick on automatic reducing borehole-enlarging drilling tool is resetted；Then, by automatic reducing borehole-enlarging drilling tool extract out to get
Pressure relief vent；
5th step continues, in next working face driving along next gob tunnel, to repeat above-mentioned second step to the 4th step, until work
Face full extraction is completed.
Spacing between above-mentioned each thief hole A is 30 meters.
Spacing between above-mentioned each pressure relief vent is 5~10 meters.
In practical recovery process, letting out and (unload) pressure, effect is good, supporting effect of roadway is good.
Claims (4)
1. a kind of drilling construction method in driving along next gob unloading blast hole, which is characterized in that include the following steps：
The first step, in the haulage gate of first mining face, not by the coal of mining influence side in, drilling the sampling holes A several, collect institute
The ickings that drills out simultaneously is weighed；
Then, the quality of pc of average every meter of drilling depth of each thief hole A is calculated separately out, standard value is used as after weighted average
B；
Above-mentioned each thief hole A is equally spaced, and hole depth is 10 meters；
Second step, after waiting for first mining face exploitation, in subsequent work face driving along next gob tunnel close to one lateral extent of working face
At the height of bottom plate 1.5m, drilling the sampling holes C,
In boring procedure, 1 meter is often crept into, collect the ickings once drilled out and is weighed, the coal dust matter of every meter of drilling depth is recorded
Measure D；
When finding that drilled out ickings weight no longer changes with the increase of drilling depth, stops boring, obtain thief hole C；
The aperture of above-mentioned thief hole C is equal with the aperture of thief hole A；
Third walks, and each quality of pc D numerical value is compared with above-mentioned standard value B, obtains driving along next gob tunnel close to working face
The distribution of abutment pressure of side, i.e.,：
It is high stress elastic region when quality of pc D numerical value is higher than the drilling depth region corresponding to standard value B, is less than standard value B
Corresponding drilling depth region is low stress plastic zone；
4th step, using automatic reducing borehole-enlarging drilling tool, in front of working face along tunnel to the region for stopping adopting line, if equidistantly boring
The pressure relief vent of dry quantity；
The pressure relief vent is stepped hole, interior thick outer thin；The depth of pressure relief vent is more than or equal to above-mentioned high stress elastic region institute
Corresponding drilling depth region；The boring method of pressure relief vent is as follows：
Bit diameter needed for selection, drills, from outside to inside when drilling depth enters corresponding to above-mentioned high stress elastic region
Drilling depth region after, open automatic reducing borehole-enlarging drilling tool on cutter hub pick, bit diameter is adjusted to 3-5 before
Times, turn round reaming from inside to outside since bottom hole；
After turning round the drilling depth region corresponding to reaming to above-mentioned low stress plastic zone, automatic reducing borehole-enlarging drilling is closed
Tool, and the cutter hub pick on automatic reducing borehole-enlarging drilling tool is resetted；Then, automatic reducing borehole-enlarging drilling tool is extracted out to get release
Hole；
5th step continues, in next working face driving along next gob tunnel, to repeat above-mentioned second step to the 4th step, until working face is complete
Portion's exploitation is completed.
2. the drilling construction method in driving along next gob unloading blast according to claim 1 hole, which is characterized in that thief hole A
Quantity be 3, the spacing between each thief hole A is 30 meters.
3. the drilling construction method in driving along next gob unloading blast according to claim 1 hole, which is characterized in that each release
Spacing between hole is 5~10 meters.
4. the drilling construction method in driving along next gob unloading blast according to claim 1 hole, which is characterized in that thief hole C
The aperture of aperture and thief hole A be 42mm；
The a diameter of 60mm of thin segment, a diameter of 300mm of thick section of step-like pressure relief vent.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107503688A (en) * | 2017-09-19 | 2017-12-22 | 山东科技大学 | A kind of unloading blast structure, preparation method and its Counterboring apparatus |
| CN108915686B (en) * | 2018-06-20 | 2019-11-05 | 山东科技大学 | A kind of coal road danger of burst area bore hole axis-two-way pressure relief method of diameter |
| CN108843331B (en) * | 2018-07-06 | 2019-10-11 | 山东科技大学 | Slim hole joint release method for arranging under the equivalent drilling area of one kind |
| CN110029996B (en) * | 2019-04-22 | 2020-07-07 | 湖南科技大学 | Retaining wall type drilling pressure relief method for preventing and controlling coal mine rock burst |
| CN110905402B (en) * | 2019-11-13 | 2021-05-28 | 山东科技大学 | Pressure relief hole construction method based on mining induced stress dynamic monitoring |
| CN110878694B (en) * | 2019-12-13 | 2021-06-04 | 山东科技大学 | Protection method for mining-influenced impact dangerous roadway during overhaul |
| CN112855123B (en) * | 2021-01-19 | 2023-04-11 | 兖州煤业股份有限公司 | Method for determining depth of pressure relief drilling hole |
| CN114562232B (en) * | 2022-01-24 | 2022-10-18 | 中国矿业大学 | Stepped large-diameter drill hole pressure relief and permeability increase gas extraction method |
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| US6609668B1 (en) * | 2001-01-30 | 2003-08-26 | Cavitation, Inc. | Cavitation and cleaning tool |
| CN103161402B (en) * | 2013-03-27 | 2016-06-29 | 华亭煤业集团有限责任公司 | Coal seam high-pressure hydraulic bedding drilling and cutting pressure relief method |
| CN103397883B (en) * | 2013-08-21 | 2016-01-20 | 大同煤矿集团有限责任公司 | Mutil-coal seam mining Rock Burst method for integrated control |
| CN104636532A (en) * | 2014-11-18 | 2015-05-20 | 山西潞安环保能源开发股份有限公司 | Hole sealing depth and length determining method for coal mine gas extraction drilled hole |
| CN104763470B (en) * | 2015-03-27 | 2017-03-08 | 辽宁工程技术大学 | A mining hole multi objective intelligent early-warning bump system and method |
| CN106194186A (en) * | 2016-07-06 | 2016-12-07 | 中国矿业大学 | The drilling release control method of coal wall stope drift active workings advance support section deformation |
| CN106368701B (en) * | 2016-09-27 | 2019-04-23 | 天地科技股份有限公司 | The method and device in lane is stayed using hydraulic fracturing release control stope drift active workings |
| CN106368729A (en) * | 2016-11-04 | 2017-02-01 | 大同煤矿集团有限责任公司 | Advanced mining pressure relief zone gas pre-extraction prevention and control method |
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Effective date of registration: 20210810 Address after: 266590 No. 579, Qian Wan Gang Road, Qingdao economic and Technological Development Zone, Shandong Patentee after: Shandong University of Science and Technology Address before: 266590 No. 579, Qian Wan Gang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: Shandong University of Science and Technology Patentee before: SHANDONG HUANING MINING GROUP Co.,Ltd. |