CN106643355A - Forced roof caving method for hugely-thick hard roof in deep coal mine - Google Patents
Forced roof caving method for hugely-thick hard roof in deep coal mine Download PDFInfo
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- CN106643355A CN106643355A CN201710043566.6A CN201710043566A CN106643355A CN 106643355 A CN106643355 A CN 106643355A CN 201710043566 A CN201710043566 A CN 201710043566A CN 106643355 A CN106643355 A CN 106643355A
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- joint
- pvc
- cutting
- pvc joint
- powder stick
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 title abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 86
- 238000005422 blasting Methods 0.000 claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 17
- 239000002360 explosive Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 41
- 238000004880 explosion Methods 0.000 claims description 11
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 5
- 238000005474 detonation Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 3
- 230000001186 cumulative effect Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 238000012546 transfer Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- 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
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a forced roof caving method for a hugely-thick hard roof in a deep coal mine. The method comprises the following steps: drilling fan-shaped blast holes in the gob roof; sleeving one ends of cartridges with PVC joint-cutting pipes and tying up for fixing; jacking the cartridges into the blast holes, with the ends sleeved with the PVC joint-cutting pipes in the hole bottoms and the ends not sleeved with PVC joint-cutting pipes in the hole openings; blocking the hole openings with stemming; connecting all the cartridges; and detonating in the explosives order. In the invention, the ends, of the cartridges, in the hole bottoms are sleeved with the PVC joint-cutting pipes to use the cumulative blasting energy effect of the PVC joint-cutting pipes, so that the blasting energy in the hole bottoms is released, as much as possible, directionally to the space between holes, in order to enable the blasting energy to run through all the hole bottoms and further enhance the loosening effect of blasting. The space advantage of the fan-shaped hole pattern is combined with the energy advantage of the PVC joint-cutting pipes, so that a good deep-hole blasting presplitting effect is achieved.
Description
Technical field
The present invention relates to a kind of overhead caving method of the huge thick tight roof of deep coalmine.
Background technology
Although in recent years China is still the main energy sources of China carrying forward vigorously the use of new forms of energy, coal.Can
With it is intended that in the evolution of following many decades, coal still will be used as main energy sources long-term existence.Now, coal
Exploitation comes into deep, and the safety problem in the recovery process of deep coal is a problem that can not be ignored, in colliery thing
Therefore in, it is larger that tight roof is caving suddenly the major accident proportion for causing.Tight roof thickness is relatively large, bulk strength
All preferable with globality, the development of the plane of weakness such as joint, crack is poor.With the continuous propulsion of coal-face, above goaf hangs
The area of empty top board also constantly expands.When large area goaf top plate is all unable to spontaneous caving within some time, can make
Pressure high concentration in the rock mass of exploiting field top is obtained, when roof pressure exceedes supporting intensity, top board can be issued in high pressure effect
Give birth to failure by shear and be caving suddenly, and produce strong dynamic loading so that extensive work face support is pushed over or damaged,
Cause the heavy casualties of the badly damaged and personnel of equipment.
In order to avoid being caving suddenly for large area goaf top plate, it is possible to use the method destruction top board of explosion is forced
Caving, becoming hard difficult inbreak top board can inbreak top board.General principle is that after deep hole charge detonation, blasthole periphery is due to explosive
The thump of blast acts on forming fracture area, and slightly remote position forms Fractured zone so that rock mass occurs to crush, and then reaches reduction
The effect of top board.However, the overhead caving for carrying out explosion presplitting loosening currently for the huge thick tight roof of deep coalmine has efficacious prescriptions
Method also compares shortage, especially the steel for shot mode and charge constitution of science.
The content of the invention
The invention provides a kind of overhead caving method of the huge thick tight roof of deep coalmine.
To solve above-mentioned technical problem, the technical solution used in the present invention is：
A kind of overhead caving method of the huge thick tight roof of deep coalmine, including：
Hole of setting off firecrackers is bored to the tight roof of above goaf, in fan-shaped arrangement between blasthole；
The PVC joint-cutting pipes on one end set of powder stick, and PVC joint-cuttings pipe and powder stick colligation are prevented into PVC in powder stick end
Joint-cutting pipe slides on powder stick；
Powder stick is headed into blasthole, the one end for being cased with PVC joint-cutting pipes is pushed up positioned at hole, and the one end without PVC joint-cutting pipes is located at
Aperture；
By each powder stick line, and detonate by Explosives Order.
Preferably, it is a that the blasthole length beaten is bored toward above goaf, and it is 3～5 per group to be drilled with the number of the boring hole, is constituted
Fanhole(s) between angle be 20 °～40 °.
Alternatively, blasthole length a needs to meet：a≥0.7*h
Wherein, a is blasthole length, and h is above goaf tight roof thickness.
Preferably, being enclosed within the joint-cutting length of tube b of powder stick one end needs to meet：b≥0.3*l
Wherein, b is the PVC joint-cutting length of tube for being enclosed within powder stick one end, and l is powder stick length.
Preferably, position of the PVC joint-cutting pipes on powder stick in blasthole should meet following condition：
Lancing location on PVC joint-cutting pipes should be adjusted to relative position, the i.e. joint-cutting of every group of fanhole(s) should position
On same plane, it is ensured that explosion energy effectively can discharge along joint-cutting direction, preferentially formed between fanhole(s) and run through
Crackle.
Preferably, a kind of steel for shot mode and charge constitution of Deephole pre-splitting blasting also includes step：The PVC
The internal diameter of joint-cutting pipe 1～2mm bigger than powder stick radius, is easy to be packed into powder stick；The wall thickness of the PVC joint-cuttings pipe be 3mm, the thickness
Degree PVC joint-cuttings pipe can save manufacturing cost again while proof strength；Joint-cutting quantity is 2 on the PVC joint-cuttings pipe
Group, this two groups of joint-cuttings are 180 ° with the angle of joint-cutting pipe axis；Width of slit on the PVC joint-cuttings pipe is 3mm, be ensure that
Explosive charge energy priority discharges along joint-cutting direction；The continuous length of every group of joint-cutting is 200mm on the PVC joint-cuttings pipe, is spaced
Distance is 10mm, it is ensured that the resistance to overturning of joint-cutting pipe.
Preferably, every group of fanhole(s) is detonation simultaneously, it is ensured that effective superposition of the Explosive stress wave between blasthole, promotes
The formation of crackle between blasthole, heavy blasting and presplitting effect.
The present invention fan transfer by way of, can again same position try one's best more set off firecrackers holes, improve drilling machine
Operating efficiency, spatially increased the coverage of blast action, improve capacity usage ratio.From aperture to bottom hole, due to medicine
The distance between volume gradually increases, and the explosion presplitting for causing aperture acts on most strong, with the increase of hole depth, in-place blasting out effect by
It is decrescence weak, for this shortcoming, present invention PVC joint-cutting pipes on set on the powder stick of bottom hole, using the explosion cumulative of PVC joint-cutting pipes
Effect so that the blasting energy of bottom hole to targeted release between Kong Yukong, to each blasthole that insertion is located at bottom hole, enters as far as possible
The in-place blasting out effect at one step Strengthening Hole bottom.The present invention is excellent by the energy of the space advantage of fan transfer mode and PVC joint-cutting pipes
Gesture combines, and reaches good deep hole blasting presplitting effect.
Description of the drawings
Fig. 1 is the schematic diagram of the steel for shot mode of the present invention and charge constitution；
Fig. 2 is the flow process signal of a kind of steel for shot mode of Deephole pre-splitting blasting of the invention and charge constitution embodiment
Figure；
In figure, the tight roof of 1 above goaf；The powder stick of 2 PVC-free joint-cutting pipes；3 powder sticks for having PVC joint-cutting pipes；
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to protection scope of the present invention.
Referring to shown in Fig. 1, the embodiment of the present invention provides a kind of steel for shot mode and charge constitution of Deephole pre-splitting blasting,
Including step：
S1, to goaf top plate bore beat fanhole(s)；
S2, on one section of powder stick set PVC joint-cutting pipes, colligation fixes；
S3, powder stick is headed into blasthole, the one end for being cased with PVC joint-cutting pipes is located at bottom hole, and the one end without PVC joint-cutting pipes is located at
Aperture, is blocked in aperture with stemming；
S4, by each powder stick line, detonate by Explosives Order.
The steel for shot mode and charge constitution embodiment of a kind of Deephole pre-splitting blasting of the present invention, with fan transfer
Mode, can same position as far as possible holes of setting off firecrackers again more, improve the operating efficiency of drilling machine, spatially increased explosion work
Coverage, improves capacity usage ratio.From aperture to bottom hole, the distance between powder stick gradually increases, i.e. the explosion in aperture
Presplitting effect is most strong, and with the increase of hole depth, in-place blasting out effect gradually weakens, for this feature, on the powder stick of bottom hole
Joint-cutting pipe is put, using the explosion Mohaupt effect of joint-cutting pipe so that blasting energy discharges between hole as far as possible, further Strengthening Hole bottom
In-place blasting out effect.The present invention combines the energy advantage of the space advantage of fan transfer mode and joint-cutting pipe, reaches good
Good deep hole blasting presplitting effect.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, it is preferable that the fan-shaped big gun
3～5, per group of hole, 20 °～40 ° of angle between blasthole.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, it is preferable that the blasthole is long
Degree a meets：a≥0.7*h
Wherein, a is blasthole length, and h is above goaf tight roof thickness.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, with reference to Fig. 2, in powder stick one end
Put PVC joint-cutting pipes, it is preferable that being enclosed within the PVC joint-cutting length of tube b of powder stick one end needs to meet：b≥0.3*l
Wherein, b is the PVC joint-cutting length of tube for being enclosed within powder stick one end, and l is powder stick length.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, the PVC joint-cuttings pipe it is interior
Footpath 1～2mm bigger than powder stick radius, is easy to be packed into powder stick；The wall thickness of the PVC joint-cuttings pipe is 3 millimeters, the PVC of the thickness
Joint-cutting pipe can save manufacturing cost again while proof strength；Joint-cutting quantity is 2 groups on the PVC joint-cuttings pipe, this
Two groups of joint-cuttings be 180 ° with the angle of joint-cutting pipe axis；Width of slit on the PVC joint-cuttings pipe is 3mm, be ensure that fried
Medicine explosion energy preferentially discharges along joint-cutting direction；On the PVC joint-cuttings pipe continuous length of every group of joint-cutting be 200mm, spacer
From for 10mm, it is ensured that the resistance to overturning of joint-cutting pipe.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, by PVC joint-cutting pipe boxes in medicine
After on volume, PVC joint-cuttings pipe and powder stick colligation are fixed, prevent PVC joint-cutting pipes from sliding on powder stick.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, by described PVC joint-cuttings are cased with
The powder stick of pipe is headed into blasthole, adjusts the position of PVC joint-cutting pipes, it is ensured that at the lancing location in every group of fanhole(s) on joint-cutting pipe
On same plane, it is ensured that explosion energy effectively can discharge along joint-cutting direction, preferentially formed between fanhole(s) and run through
Crackle.
In the steel for shot mode and charge constitution embodiment of aforementioned Deephole pre-splitting blasting, it is preferable that per group of fan-shaped big gun
Hole is detonation simultaneously, it is ensured that effective superposition of the Explosive stress wave between blasthole, promotes the formation of crackle between blasthole, strengthens pine
Dynamic and presplitting effect.
The steel for shot mode and charge constitution embodiment of Deephole pre-splitting blasting of the present invention, by the space of fan transfer mode
The energy advantage of advantage and joint-cutting pipe combines, and can effectively realize the in-place blasting out of hard huge thick top plate, and manual control is mined out
Top board is effectively caving above area, it is ensured that construct and production safety in colliery.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (7)
1. the overhead caving method of the huge thick tight roof of a kind of deep coalmine, it is characterised in that comprise the following steps：
Bore to goaf top plate and beat fanhole(s)；
The PVC joint-cutting pipes on the set of powder stick one end, colligation is fixed；
Powder stick is headed into blasthole, the one end for being cased with PVC joint-cutting pipes is located at bottom hole, and the one end without PVC joint-cutting pipes is located at aperture,
Aperture is blocked with stemming；
By each powder stick line, detonate by Explosives Order.
2. method according to claim 1, it is characterised in that per group of the fanhole(s) 3～5 beaten is bored to goaf top plate
It is individual, 20 °～40 ° of angle between blasthole；Blasthole length a needs to meet：A >=0.7*h, wherein, a is blasthole length, and h is on goaf
Square tight roof thickness.
3. method according to claim 1, it is characterised in that the PVC joint-cutting pipes on the set of powder stick one end, is enclosed within powder stick one end
PVC joint-cutting length of tube b need meet：B >=0.3*l, wherein, b is the PVC joint-cutting length of tube for being enclosed within powder stick one end, and l is that powder stick is long
Degree.
4. the method according to claim 1 or 3, it is characterised in that the internal diameter of the PVC joint-cuttings pipe is bigger than powder stick radius by 1
～2mm；The wall thickness of the PVC joint-cuttings pipe is 3mm；The PVC joint-cuttings pipe has 2 groups of joint-cuttings, this two groups of joint-cuttings with joint-cutting pipe axle
Line is coplanar；Width of slit on the PVC joint-cuttings pipe is 3mm；The continuous length of every group of joint-cutting is on the PVC joint-cuttings pipe
200mm, spacing distance is 10mm, it is ensured that the resistance to overturning of PVC joint-cutting pipes.
5. method according to claim 4, it is characterised in that by PVC joint-cuttings pipe box on the powder stick after, by PVC joint-cuttings
Pipe and powder stick colligation are fixed, and prevent PVC joint-cutting pipes from sliding on powder stick.
6. method according to claim 1, it is characterised in that the powder stick for being cased with PVC joint-cutting pipes is headed into blasthole,
The position of adjustment PVC joint-cutting pipes, it is ensured that the lancing location in every group of fanhole(s) on PVC joint-cutting pipes is in the same plane, protects
Card explosion energy effectively can discharge along joint-cutting direction, and through-wall crack is preferentially formed between fanhole(s).
7. method according to claim 1, it is characterised in that every group of fanhole(s) is to detonate simultaneously, it is ensured that detonation stresses
Effective superposition of the ripple between blasthole, promotes the formation of crackle between blasthole, heavy blasting and presplitting effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043566.6A CN106643355B (en) | 2017-01-19 | 2017-01-19 | A kind of overhead caving method of the huge thick tight roof of deep coalmine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043566.6A CN106643355B (en) | 2017-01-19 | 2017-01-19 | A kind of overhead caving method of the huge thick tight roof of deep coalmine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106643355A true CN106643355A (en) | 2017-05-10 |
| CN106643355B CN106643355B (en) | 2019-07-09 |
Family
ID=58841022
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710043566.6A Expired - Fee Related CN106643355B (en) | 2017-01-19 | 2017-01-19 | A kind of overhead caving method of the huge thick tight roof of deep coalmine |
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| Country | Link |
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| CN (1) | CN106643355B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643910A (en) * | 2018-05-04 | 2018-10-12 | 太原理工大学 | A method of controlling caving for coal mine stope tight roof Advance presplitting |
| CN109827484A (en) * | 2019-03-28 | 2019-05-31 | 中国矿业大学(北京) | A kind of huge thick tight roof orientation presplitting of highly gassy mine loosens method |
| CN111022051A (en) * | 2019-12-26 | 2020-04-17 | 山东省邱集煤矿有限公司 | Forced caving method for central hard top plate of working face |
| CN111350506A (en) * | 2020-03-13 | 2020-06-30 | 海南矿业股份有限公司 | Goaf roof treatment blast hole arrangement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734225A (en) * | 2004-08-03 | 2006-02-15 | 神华集团有限责任公司 | Blasting method for fully mechanized mining face |
| CN103278055A (en) * | 2013-05-31 | 2013-09-04 | 辽宁工程技术大学 | Roof-cutting pressure relief method in hard-roof deep-hole pre-splitting blasting |
| CN103411493A (en) * | 2013-08-13 | 2013-11-27 | 中国矿业大学 | Drilling and powder charging method for goaf-penetrating deep hole presplitting blasting |
| CN103615286A (en) * | 2013-12-06 | 2014-03-05 | 中国矿业大学(北京) | Working face roof-cutting depressurizing method |
| CN204188084U (en) * | 2014-10-24 | 2015-03-04 | 四川川煤华荣能源股份有限公司小宝鼎煤矿 | Directed presplit blasting device |
-
2017
- 2017-01-19 CN CN201710043566.6A patent/CN106643355B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734225A (en) * | 2004-08-03 | 2006-02-15 | 神华集团有限责任公司 | Blasting method for fully mechanized mining face |
| CN103278055A (en) * | 2013-05-31 | 2013-09-04 | 辽宁工程技术大学 | Roof-cutting pressure relief method in hard-roof deep-hole pre-splitting blasting |
| CN103411493A (en) * | 2013-08-13 | 2013-11-27 | 中国矿业大学 | Drilling and powder charging method for goaf-penetrating deep hole presplitting blasting |
| CN103615286A (en) * | 2013-12-06 | 2014-03-05 | 中国矿业大学(北京) | Working face roof-cutting depressurizing method |
| CN204188084U (en) * | 2014-10-24 | 2015-03-04 | 四川川煤华荣能源股份有限公司小宝鼎煤矿 | Directed presplit blasting device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643910A (en) * | 2018-05-04 | 2018-10-12 | 太原理工大学 | A method of controlling caving for coal mine stope tight roof Advance presplitting |
| CN109827484A (en) * | 2019-03-28 | 2019-05-31 | 中国矿业大学(北京) | A kind of huge thick tight roof orientation presplitting of highly gassy mine loosens method |
| CN111022051A (en) * | 2019-12-26 | 2020-04-17 | 山东省邱集煤矿有限公司 | Forced caving method for central hard top plate of working face |
| CN111022051B (en) * | 2019-12-26 | 2021-03-16 | 山东省邱集煤矿有限公司 | Forced caving method for central hard top plate of working face |
| CN111350506A (en) * | 2020-03-13 | 2020-06-30 | 海南矿业股份有限公司 | Goaf roof treatment blast hole arrangement method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106643355B (en) | 2019-07-09 |
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Granted publication date: 20190709 Termination date: 20200119 |