CN108331609A - Concordant drilling slot release anti-reflection method - Google Patents

Concordant drilling slot release anti-reflection method Download PDF

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Publication number
CN108331609A
CN108331609A CN201810060728.1A CN201810060728A CN108331609A CN 108331609 A CN108331609 A CN 108331609A CN 201810060728 A CN201810060728 A CN 201810060728A CN 108331609 A CN108331609 A CN 108331609A
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China
Prior art keywords
slot
drilling
concordant
reflection
discoid
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CN201810060728.1A
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CN108331609B (en
Inventor
张永将
袁本庆
李成成
陆占金
孟贤正
曹建军
杨慧明
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Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
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Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
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Publication of CN108331609A publication Critical patent/CN108331609A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production
    • E21B43/26Methods for stimulating production by forming crevices or fractures

Abstract

The invention discloses a kind of concordant drilling slot release anti-reflection methods, include the following steps:(1) drilling is formed using high-pressure hydraulic slotting device construction concordant mash gas pumping drilling according to concordant mash gas pumping drilling design requirement;(2) brill is not moved back, high pressure water is passed through in high-pressure hydraulic slotting device rotate circumferential cutting to coal body and form discoid slot;(3) after discoid slot is formed, brill is moved back, and drill bit, drilling rod carry out radial cuts to coal body and form radial slot without rotation;(4) step (2) and step (3) are repeated, forms a plurality of discoid slot and radial slot in same drilling;(5) repeat step (1) to (4), to other concordants drilling respectively implement drill, slot operation.Present invention reduces coal seam both horizontally and vertically stress, improve drilling gas extraction concentration and flow, reduce working face concordant drilling hole amount, and method is easy, easy to operate.

Description

Concordant drilling slot release anti-reflection method
Technical field
The present invention relates to coal mine gas drainage technical field, more particularly to a kind of concordant drilling slot release anti-reflection method.
Background technology
Deep mining coal and gas prominent, bump are a kind of very serious and commonplace threat safety of coal mines The natural calamity of production.According to incompletely statistics, there are gas dynamical disaster in a countries and regions about more than 20 at present, occur At more than 50,000 times, dead more than 35000 people, wherein bump accident also increase the total degree of disaster year by year.With mining depth Increase, coal-bed gas pressure, gas bearing capacity, crustal stress increase, and the outburst hazard of projecting mine is increasingly severe, becomes threat Mining area safety produces one of main problem;In addition to this, deep increase, the increase of mine pressure are adopted can also bring bump and The problems such as deep-well underground heat.
In the case where Deep Mine high intensity opens up mining conditions, the dynamic disasters such as coal and gas prominent, bump may be total to It is stored in same mine or coal seam different zones.To improve Gas pre-drainage effect and reducing high-ground stress, concordant drilling takes brill It draws cave, deep-hole control presplit blasting, deep hole standing shot, high-pressure water jet reaming, hydraulic slotted liner technique, hydraulic fracturing and compound arranges in hole It is anti-reflection to apply reinforcing release.Though these measures obtain certain effect to improving low-permeable high gas layer extraction rate;But there are bright Aobvious limitation, the accidents such as some mines induce protrusion after taking anti-reflection measure, tunnel is collapsed, less effective;It in addition cannot be to coal The continuous release of layer progress is anti-reflection, can not fundamentally ensure the safe and efficient production of stope.
Invention content
The slot release anti-reflection method in view of this, a kind of concordant of the present invention drills, overcomes the deficiency in prior art, Provide the continuous slotting process that a kind of circumferential and radial hydraulic slotted liner technique is combined, realize coal working face coal seam entirety release and It is anti-reflection, reduce working face concordant mash gas pumping drilling quantity, reduce that coal seam is vertical, stress level of horizontal direction, ensures Working face safe and efficient back production.
The concordant drilling slot release anti-reflection method of the present invention, includes the following steps:
(1) according to concordant mash gas pumping drilling design requirement, high-pressure hydraulic slotting device construction concordant gas pumping is utilized Drilling forms drilling;
(2) brill is not moved back, high pressure water is passed through in high-pressure hydraulic slotting device, coal body rotate circumferential cutting and formed justifying Plate-like slot;
(3) after discoid slot is formed, brill is moved back, and drill bit, drilling rod carry out radial cuts to coal body and formed without rotation Radial slot;
(4) step (2) and step (3) are repeated, forms a plurality of discoid slot and radial slot in same drilling, until away from It is terminated when the tapping point 5-15m of the drilling, completes one group of concordant drilling anti-reflection work of slot release;
(5) repeat step (1) to (4), to other concordants drilling respectively implement drill, slot operation, realize actual mining The entire coal body concordant drilling anti-reflection work of release in face.
Further, in step (2), the radius of the discoid slot of formation is 2-3m, is highly 40-100mm.
Further, in step (2), following steps are specifically included when rotate circumferential cutting to coal body:
(2a) high-pressure water pressure is adjusted to 20-50MPa, and the slot time is 5-10min, forms the discoid seam of radius 0.5-1m Slot;
(2b) high-pressure water pressure is adjusted to 50-80MPa, and the slot time is 3-5min, forms the discoid slot of radius 1-2m;
(2c) high-pressure water pressure is adjusted to 80-150MPa, and the slot time is 1-3min, forms the discoid seam of radius 2-3m Slot.
Further, in step (2), drilling rod, the drill bit of high-pressure hydraulic slotting device keep rotation status.
Further, the spacing of the adjacent discoid slot is 1-6m.
Further, in step (3), the radius of the radial slot of formation is 1-2m, is highly 30-80mm.
Further, in step (3), it is 5-10min/m to move back drilling speed degree, and high-pressure water pressure is maintained at 80-150MPa.
Further, in step (2), drilling rod is moved forward and backward during retreating.
Further, the high-pressure hydraulic slotting device rated pressure 100-150MPa, metered flow 80-125L/min.
Beneficial effects of the present invention:
The concordant drilling slot release anti-reflection method of the present invention, concordant drilling construction do not move back brill after the completion, utilize super-pressure The circumferential cutting of hydraulic slotted liner technique device rotation and ladder pressure mode form discoid slot, further move back brill and utilize superelevation in the process Pressure hydraulic slotted liner technique device do not rotate with the slow speed of 5-10min/m move back brill formed radial cuts formed slot, repeat the above steps, Until away from tapping point 5-15m when terminates, it is anti-reflection to realize continuous, the whole release of working face coal body, overcomes traditional concordant watt The disadvantage that this extraction borehole and segmentation slotting process range are small, discontinuous release is anti-reflection;The method of the present invention is easy, it is easy to operate, Extracting result is good, reduces stress in coal bed level, has and be widely popularized applying value.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples:
Attached drawing 1 is vertical view when applying the present invention to drilling;
Attached drawing 2 is the left view when present invention is applied to drilling;
Attached drawing 3 is that concordant mash gas pumping drilling of the present invention carries out slot operation schematic diagram;
Attached drawing 4 is face haulage crossheading, track crossheading slot drilling arrangement schematic diagram.
Reference sign:1-drilling;2-discoid slots;3-radial slots;4-coal bodies;5-haulage gates; 6-track crossheadings.
Specific implementation mode
The slot release anti-reflection method as shown, the concordant of the present embodiment drills, includes the following steps:
(1) according to concordant mash gas pumping drilling design requirement, portion's coal is helped in face haulage crossheading 5, track crossheading 6 Body 4 is constructed concordant mash gas pumping drilling 1 respectively, that is, is utilized high-pressure hydraulic slotting device construction concordant mash gas pumping drilling 1, formed Drilling 1;Drillable length is 80-180m;High-pressure hydraulic slotting device can be the structure disclosed in 106150500 A of CN, herein not It repeats again, rated pressure 100-150MPa, metered flow 80-125L/min.
(2) brill is not moved back, high pressure water is passed through in high-pressure hydraulic slotting device, coal body rotate circumferential cutting and formed justifying Plate-like slot;Discoid slot can reduce the stress of coal seam horizontal direction, improve gas permeability of coal seam;The discoid seam formed The radius of slot is 2-3m, is highly 40-100mm.Specifically, coal body rotate when circumferential direction is cut and specifically include following step Suddenly:(2a) high-pressure water pressure is adjusted to 20-50MPa, and the slot time is 5-10min, forms the discoid slot of radius 0.5-1m; (2b) high-pressure water pressure is adjusted to 50-80MPa, and the slot time is 3-5min, forms the discoid slot of radius 1-2m;(2c) high pressure Water pressure is adjusted to 80-150MPa, and the slot time is 1-3min, forms the discoid slot of radius 2-3m.Moreover, during this, Drilling rod, the drill bit of high-pressure hydraulic slotting device keep rotation status, ensure the smooth row of slot drilling cuttings using drilling rod, bit Go out, avoids the generation of bit freezing, stick of tool phenomenon.
(3) after discoid slot is formed, brill is moved back, and drill bit, drilling rod carry out radial cuts to coal body and formed without rotation Radial slot;Radial slot is equivalent to and has exploited one layer of very thin protective layer in coal seam, reduces the stress of coal seam vertical direction, Improve gas permeability of coal seam;The radius of the radial slot formed is 1-2m, is highly 30-80mm;It is 5- to move back drilling speed degree 10min/m, high-pressure water pressure are maintained at 80-150MPa;During this, drilling rod is moved forward and backward during retreating, and is ensured The smooth discharge of slot drilling cuttings, avoids the generation of bit freezing, stick of tool phenomenon,
(4) step (2) and step (3) are repeated, forms a plurality of discoid slot and radial slot in same drilling, until away from It is terminated when the tapping point 5-15m of the drilling, completes one group of concordant drilling anti-reflection work of slot release;The adjacent discoid slot Spacing can be 1-6m;Discoid slot, radial slot are connected with each other coupling and form coal seam entirety in concordant mash gas pumping drilling Release and anti-reflection;
(5) repeat step (1) to (4), to other concordants drilling respectively implement drill, slot operation, realize actual mining The entire coal body concordant drilling anti-reflection work of release in face;Adjacent drilling is according to design spacing construction.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the right of invention.

Claims (9)

  1. The slot release anti-reflection method 1. a kind of concordant drills, which is characterized in that include the following steps:
    (1) it according to concordant mash gas pumping drilling design requirement, is constructed concordant mash gas pumping drilling using high-pressure hydraulic slotting device, Form drilling;
    (2) do not move back brill, be passed through in high-pressure hydraulic slotting device high pressure water to coal body rotate circumferential cutting formed it is discoid Slot;
    (3) after discoid slot is formed, brill is moved back, and drill bit, drilling rod carry out radial cuts to coal body and form radial direction without rotation Slot;
    (4) step (2) and step (3) are repeated, a plurality of discoid slot and radial slot are formed in same drilling, until away from the brill It is terminated when the tapping point 5-15m in hole, completes one group of concordant drilling anti-reflection work of slot release;
    (5) repeat step (1) to (4), to other concordants drilling respectively implement drill, slot operation, realize stope it is whole A coal body concordant drilling anti-reflection work of release.
  2. The slot release anti-reflection method 2. concordant according to claim 1 drills, it is characterised in that:In step (2), formed The radius of the discoid slot be 2-3m, be highly 40-100mm.
  3. The slot release anti-reflection method 3. concordant according to claim 2 drills, which is characterized in that in step (2), to coal Body carries out specifically including following steps when rotating circumferential cutting:
    (2a) high-pressure water pressure is adjusted to 20-50MPa, and the slot time is 5-10min, forms the discoid slot of radius 0.5-1m;
    (2b) high-pressure water pressure is adjusted to 50-80MPa, and the slot time is 3-5min, forms the discoid slot of radius 1-2m;
    (2c) high-pressure water pressure is adjusted to 80-150MPa, and the slot time is 1-3min, forms the discoid slot of radius 2-3m.
  4. The slot release anti-reflection method 4. concordant according to claim 3 drills, it is characterised in that:In step (2), high pressure Drilling rod, the drill bit of hydraulic slotted liner technique device keep rotation status.
  5. The slot release anti-reflection method 5. concordant according to claim 3 drills, it is characterised in that:The adjacent discoid seam The spacing of slot is 1-6m.
  6. The slot release anti-reflection method 6. concordant according to claim 3 drills, it is characterised in that:In step (3), formed The radius of the radial slot be 1-2m, be highly 30-80mm.
  7. The slot release anti-reflection method 7. concordant according to claim 6 drills, it is characterised in that:In step (3), brill is moved back Speed is 5-10min/m, and high-pressure water pressure is maintained at 80-150MPa.
  8. The slot release anti-reflection method 8. concordant according to claim 7 drills, it is characterised in that:In step (2), drilling rod It is moved forward and backward during retrogressing.
  9. The slot release anti-reflection method 9. concordant according to claim 1 drills, it is characterised in that:The high-pressure hydraulic slot Device rated pressure 100-150MPa, metered flow 80-125L/min.
CN201810060728.1A 2018-01-22 2018-01-22 Concordant drilling slot release anti-reflection method Active CN108331609B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110145305A (en) * 2019-04-18 2019-08-20 天地科技股份有限公司 A kind of method pressed to the lane waterpower Qie Dingliu prevention and treatment roadway bump
CN110145233A (en) * 2019-04-03 2019-08-20 山东唐口煤业有限公司 A kind of disaster-ridden evil collaboration control method of rock burst coal seam " boring-cutting-presses-pumping-to infuse "
CN111119980A (en) * 2019-12-18 2020-05-08 中煤科工集团重庆研究院有限公司 Uniform self-pressure-relief anti-reflection drilling method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966372A (en) * 2012-12-17 2013-03-13 中国矿业大学 Slotting induced-flow pressure-relief anti-reflection method for complicated seam
CN103133028A (en) * 2013-03-12 2013-06-05 河南理工大学 Underground coal seam hydrofracture crack oriented developing method
CN104612640A (en) * 2015-01-12 2015-05-13 中国矿业大学 Underground coal mine drilling, heat injection and hole sealing integration method
CN106437612A (en) * 2016-10-25 2017-02-22 中煤科工集团重庆研究院有限公司 Horizontal gas extraction drilling and hole-sealing method and hole-sealing structure thereof
CN107575204A (en) * 2017-10-26 2018-01-12 重庆大学 A kind of underground coal mine slot pressurize is oriented to pressure break anti-reflection method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966372A (en) * 2012-12-17 2013-03-13 中国矿业大学 Slotting induced-flow pressure-relief anti-reflection method for complicated seam
CN103133028A (en) * 2013-03-12 2013-06-05 河南理工大学 Underground coal seam hydrofracture crack oriented developing method
CN104612640A (en) * 2015-01-12 2015-05-13 中国矿业大学 Underground coal mine drilling, heat injection and hole sealing integration method
CN106437612A (en) * 2016-10-25 2017-02-22 中煤科工集团重庆研究院有限公司 Horizontal gas extraction drilling and hole-sealing method and hole-sealing structure thereof
CN107575204A (en) * 2017-10-26 2018-01-12 重庆大学 A kind of underground coal mine slot pressurize is oriented to pressure break anti-reflection method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110145233A (en) * 2019-04-03 2019-08-20 山东唐口煤业有限公司 A kind of disaster-ridden evil collaboration control method of rock burst coal seam " boring-cutting-presses-pumping-to infuse "
CN110145305A (en) * 2019-04-18 2019-08-20 天地科技股份有限公司 A kind of method pressed to the lane waterpower Qie Dingliu prevention and treatment roadway bump
CN111119980A (en) * 2019-12-18 2020-05-08 中煤科工集团重庆研究院有限公司 Uniform self-pressure-relief anti-reflection drilling method
CN111119980B (en) * 2019-12-18 2021-08-17 中煤科工集团重庆研究院有限公司 Uniform self-pressure-relief anti-reflection drilling method

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