CN104453898A - Deep hole blasting and static water injecting combining coal seam weakening method - Google Patents
Deep hole blasting and static water injecting combining coal seam weakening method Download PDFInfo
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- CN104453898A CN104453898A CN201410570007.7A CN201410570007A CN104453898A CN 104453898 A CN104453898 A CN 104453898A CN 201410570007 A CN201410570007 A CN 201410570007A CN 104453898 A CN104453898 A CN 104453898A
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- hole
- blasting
- holes
- coal seam
- guard aperture
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- 239000003245 coal Substances 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000005422 blasting Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003068 static effect Effects 0.000 title claims abstract description 18
- 230000003313 weakening effect Effects 0.000 title claims abstract description 10
- 239000002360 explosive Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 238000004880 explosion Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000003818 cinder Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a deep hole blasting and static water injecting combining coal seam weakening method which comprises the following steps: (1) arranging a plurality of groups of drill holes in the coal seam, wherein the drill holes in each group include a blasting hole and a control hole; (2) pushing hole protection pipes into the control holes one by one, and connecting the adjacent hole protection pipes by steel wires longitudinally in a winding way, wherein the diameter of each hole protection pipe is less than 10mm; (3) charging explosive cartridges into the hole protection pipes according to the linear loading density, pushing the hole protection pipes into the blasting holes one by one, sealing the blasting holes with yellow mud after loading is completed, and blasting; (4) injecting water into the blasting holes and the control holes at static pressure simultaneously through four seams of the hole protection pipes in the blasting holes and the control holes, and diffusing and permeating water into cracks generated by blasting to fully wet coal; and (5) recovering the hole protection pipes in the control holes after water injection is completed. After the drill holes are blasted, the drill holes can not collapse, and many cracks can be formed in the coal seam. In addition, because water can be injected into the coal seam through the blasting holes and the control holes, the strength of the coal seam can be reduced effectively.
Description
Technical field
The coal seam method for weakening that deep hole blasting combines with static pressure water filling, belongs to coal seam and weakens technical field.
Background technology
During thick coal-layer mining, if coal seam is harder or toughness is higher, then during back production, easy fracture is not broken, and the coal cinder volume of extraction is comparatively large, is unfavorable for that transport is also dangerous.For addressing this problem, often need to weaken coal body, in the reduction of coal seam, domestic and international coal scientific research personnel has done many research, comprises ahead work face Deephole pre-splitting blasting, high pressure water injection presplitting, static pressure water filling softening or the coal seam method for weakening such as explosion and presplitting to be combined.
The paper delivered is all the embody rule to said method, does not improve the shortcoming that said method exists; Existing patent one " coal seam presplitting explosion and fracturing join make anti-reflection method " (patent of invention number is 201210043595.X), its specific embodiments is: first presplit blasting in coal body, shot hole influence basin construct outward pressure break boring, wear coal body between boring by hydraulic fracturing technology pressure, form crack; Existing patent two " Deephole pre-splitting blasting grouting method " (patent of invention number is 201210380499.4), specific embodiments is: on rock mass, drilling is blown out, and has blown out to carry out slip casting to shot hole afterwards.Existing patent three " a kind of deep hole Crack Control blasting method of grouting reinforcement rock " (patent of invention number is 201310159726.5), specific embodiments is: punch in rock mass, explosive cartridge is put into powder charge pipe (being formed by two arc-shaped plate joint welding), powder charge pipe is put into boring, explosion grouting behind shaft or drift lining.Above patent all have employed the mode of presplit blasting to increase the crack of coal and rock, but does not all have when explosion to arrange control hole around shot hole, and patent one is again punched and carried out high pressure presplitting, adds workload; Patent two shot hole when explosion does not take guard aperture measure, uses shot hole to carry out slip casting, does not subside, occur plug-hole, affect slip casting effect after being difficult to ensure drilling and blasting; Patent three does not arrange control hole around shot hole, and slip casting effect is not good.
As can be seen here, prior art needs further improvement and develops.
Summary of the invention
The coal seam method for weakening that the present invention provides a kind of deep hole blasting to combine with static pressure water filling for solving above-mentioned defect of the prior art, the series of problems such as when solving coal seam deep hole blasting, boring is easily collapsed, easily stifled and static pressure water filling is more difficult, successful, has good practicality.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the coal seam method for weakening that a kind of deep hole blasting combines with static pressure water filling, comprises the following steps:
(1) in coal seam, arrange some groups of borings, often organize boring and comprise a shot hole and a control hole.
(2) in control hole, push by root the guard aperture pipe that diameter is less than aperture 10mm, between adjacent guard aperture pipe, longitudinally twine connecing with steel wire.
(3) explosive cartridge is pressed linear charging density and load guard aperture pipe, then guard aperture pipe is pushed in shot hole by root, blow out after the complete yellow mud sealing of hole of powder charge.
(4) blow out and static pressure water filling is carried out to shot hole and control hole simultaneously afterwards, water is injected by four sealings of guard aperture pipe in shot hole and control hole, and scattering and permeating enters in the crack that explosion produces, abundant moistening coal body.
(5) water filling complete after guard aperture pipe in recovery control hole.
Advantageous Effects of the present invention is:
After Deephole pre-splitting blasting, the crack in coal body is significantly increased, is increased; After static pressure water filling, moisture enters coal body by crack, reduces coal mass strength, when making working face extraction coal body can preferably broken, be caving, be convenient to transport and improve the rate of recovery; Simultaneously static pressure water filling also serves depositing dust, drives away the important function of coal gas and cost is lower.Because explosive cartridge is surrounded by metal guard aperture pipe, quick-fried raw pressure during explosive blasting is first delivered on tube wall, then passes to hole wall by even tube wall, thus not collapse hole after shot hole explosion can be ensured, make static pressure water flow energy flow at the bottom of hole along hole wall; In control hole, load guard aperture pipe before explosion simultaneously, can be unlikely to when explosion, by the shock wave shock collapse of explosive, after water filling work completes, guard aperture pipe can also be extracted in protecting control hole, use in lower group of boring, both enhanced flood effectiveness, and also saved cost.
Accompanying drawing explanation
Fig. 1 is shot hole sectional schematic diagram of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 2;
Fig. 4 is guard aperture pipe organigram;
Wherein, 1-boring, 2-guard aperture pipe, 3-explosive cartridge, 4-sealing of hole stemming, 5-coal body, 6-shot hole, 7-control hole, 8-fan-shaped sheet material, 9-welding iron bar, 10-guard aperture pipe seam mouth.
Detailed description of the invention
The invention provides the coal seam method for weakening that a kind of deep hole blasting combines with static pressure water filling, in order to make object of the present invention, technical scheme and advantage clearer, clear and definite, below with reference to accompanying drawing and embodiment, the present invention is described in more detail.
The coal seam method for weakening that deep hole blasting combines with static pressure water filling, it is characterized in that, described method comprises the steps:
(1) in coal seam, arrange some groups of borings 1, often organize boring 1 and comprise a shot hole 6 and a control hole 7;
(2) in control hole 7, push by root the guard aperture pipe 2 that diameter is less than aperture 10mm, between adjacent guard aperture pipe 2, longitudinally twine connecing with steel wire;
(3) explosive cartridge 3 is pressed linear charging density and load guard aperture pipe 2, then guard aperture pipe 2 is pushed in shot hole 6 by root, blow out after the complete yellow mud sealing of hole of powder charge;
(4) blow out and static pressure water filling is carried out to shot hole 6 and control hole 7 simultaneously afterwards, make water by four sealings 10 of guard aperture pipe 2 in shot hole and control hole, and scattering and permeating enters in the crack that explosion produces, abundant moistening coal body;
(5) water filling complete after guard aperture pipe 2 in recovery control hole.
Described boring can slightly 3 ~ 5 °, the angle of depression, hole depth 30m, bore diameter 60mm, spacing of wells 4m.
Described guard aperture pipe hollow and tube wall has gap, is formed by the joint welding of four fan-shaped sheet material 8, sheet metal thickness 3mm, guard aperture pipe 2 joint length 2m, guard aperture pipe external diameter 50mm.
The part do not addressed in aforesaid way is taked or uses for reference prior art to realize.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make the various deformation such as replacement, simple combination, these all fall within protection scope of the present invention, and request protection domain of the present invention should be as the criterion with claims.
Claims (3)
1. the coal seam method for weakening that combines with static pressure water filling of deep hole blasting, it is characterized in that, described method comprises the steps:
(1) in coal seam, arrange some groups of borings, often organize boring and comprise a shot hole and a control hole;
(2) in control hole, push by root the guard aperture pipe that diameter is less than aperture 10mm, between adjacent guard aperture pipe, longitudinally twine connecing with steel wire;
(3) explosive cartridge is pressed linear charging density and load guard aperture pipe, then guard aperture pipe is pushed in shot hole by root, blow out after the complete yellow mud sealing of hole of powder charge;
(4) blow out and static pressure water filling is carried out to shot hole and control hole simultaneously afterwards, water is injected by four sealings of guard aperture pipe in shot hole and control hole, and scattering and permeating enters in the crack that explosion produces, abundant moistening coal body;
(5) water filling complete after guard aperture pipe in recovery control hole.
2. the method as described in claim 1, is characterized in that, in described (1) step, boring can slightly 3 ~ 5 °, the angle of depression, and hole dark 30 ~ 50m, bore diameter 60 ~ 80mm.
3. the method as described in claim 1, is characterized in that, in described (2) or (3) step, guard aperture pipe joint length 2m, hollow and tube wall has gap, the fan-shaped sheet material joint welding being 3 ~ 5mm by four thickness forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410570007.7A CN104453898A (en) | 2014-10-23 | 2014-10-23 | Deep hole blasting and static water injecting combining coal seam weakening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410570007.7A CN104453898A (en) | 2014-10-23 | 2014-10-23 | Deep hole blasting and static water injecting combining coal seam weakening method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104453898A true CN104453898A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410570007.7A Pending CN104453898A (en) | 2014-10-23 | 2014-10-23 | Deep hole blasting and static water injecting combining coal seam weakening method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847351A (en) * | 2015-05-31 | 2015-08-19 | 西安科技大学 | Three-dimensional roof controlling method for fully mechanized caving of steeply inclined and extremely thick coal seam |
| CN105178959A (en) * | 2015-10-27 | 2015-12-23 | 山东科技大学 | On-site coal elastoplasticity immediate test method |
| CN105275462A (en) * | 2015-10-27 | 2016-01-27 | 山东科技大学 | Method for testing creep deformation type rock burst dangerous area immediately on site |
| CN105422164A (en) * | 2015-12-14 | 2016-03-23 | 河南理工大学 | Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam |
| CN105649625A (en) * | 2016-01-15 | 2016-06-08 | 山东科技大学 | High-low-pressure subarea fracturing anatonosis type coal seam water injection method |
| CN106121644A (en) * | 2016-06-17 | 2016-11-16 | 中国矿业大学 | Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and supporting reinforcement |
| CN106323109A (en) * | 2016-11-04 | 2017-01-11 | 大同煤矿集团有限责任公司 | Longhole pressure-bearing blasting method of hard coal rock |
| JP2017116127A (en) * | 2015-12-21 | 2017-06-29 | 三井住友建設株式会社 | Charging method for controlling cracking in blasting concrete skeleton |
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| CN102635388A (en) * | 2012-02-24 | 2012-08-15 | 煤炭科学研究总院沈阳研究院 | Interaction permeability-increasing method of pre-splitting blasting and hydraulic cracking of coal seam |
| CN102678117A (en) * | 2012-05-28 | 2012-09-19 | 中国矿业大学 | Directional hydraulic fracturing method based on energizing blasting |
| CN102787843A (en) * | 2012-08-07 | 2012-11-21 | 新汶矿业集团有限责任公司协庄煤矿 | Dirt band-containing coal seam working surface mining process |
| CN103206903A (en) * | 2013-04-08 | 2013-07-17 | 中国矿业大学 | Hard roof directional pressure-bearing blasting control method |
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2014
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Patent Citations (5)
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| CN101666241A (en) * | 2009-09-05 | 2010-03-10 | 中国矿业大学 | Integrated drilling-blasting-pressurizing-drawing protrusion preventing method for regional gas control |
| CN102635388A (en) * | 2012-02-24 | 2012-08-15 | 煤炭科学研究总院沈阳研究院 | Interaction permeability-increasing method of pre-splitting blasting and hydraulic cracking of coal seam |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847351A (en) * | 2015-05-31 | 2015-08-19 | 西安科技大学 | Three-dimensional roof controlling method for fully mechanized caving of steeply inclined and extremely thick coal seam |
| CN104847351B (en) * | 2015-05-31 | 2017-07-25 | 西安科技大学 | A kind of severe inclined thick coal seam longwall top coal caving controls top method with three-dimensional |
| CN105178959B (en) * | 2015-10-27 | 2017-06-16 | 山东科技大学 | The plastoelastic method of coal body is tested at a kind of scene immediately |
| CN105178959A (en) * | 2015-10-27 | 2015-12-23 | 山东科技大学 | On-site coal elastoplasticity immediate test method |
| CN105275462A (en) * | 2015-10-27 | 2016-01-27 | 山东科技大学 | Method for testing creep deformation type rock burst dangerous area immediately on site |
| CN105275462B (en) * | 2015-10-27 | 2018-01-09 | 山东科技大学 | The method of the live danger zone of test creepage type bump immediately |
| CN105422164A (en) * | 2015-12-14 | 2016-03-23 | 河南理工大学 | Efficient water injection method and device of hydraulic fracture permeability increase auxiliary coal seam |
| JP2017116127A (en) * | 2015-12-21 | 2017-06-29 | 三井住友建設株式会社 | Charging method for controlling cracking in blasting concrete skeleton |
| CN105649625B (en) * | 2016-01-15 | 2017-11-21 | 山东科技大学 | A kind of high-low pressure subregion fracturing anatonosis formula coal-bed flooding method |
| CN105649625A (en) * | 2016-01-15 | 2016-06-08 | 山东科技大学 | High-low-pressure subarea fracturing anatonosis type coal seam water injection method |
| CN106121644A (en) * | 2016-06-17 | 2016-11-16 | 中国矿业大学 | Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and supporting reinforcement |
| CN106121644B (en) * | 2016-06-17 | 2018-05-29 | 中国矿业大学 | The water-filling pressure-bearing unloading pressure by blasting of cellular structure and supporting reinforcement are crosslinked based on drilling in coal and rock plane |
| CN106323109A (en) * | 2016-11-04 | 2017-01-11 | 大同煤矿集团有限责任公司 | Longhole pressure-bearing blasting method of hard coal rock |
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Application publication date: 20150325 |