CN111594183A - Coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes - Google Patents
Coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes Download PDFInfo
- Publication number
- CN111594183A CN111594183A CN202010439413.5A CN202010439413A CN111594183A CN 111594183 A CN111594183 A CN 111594183A CN 202010439413 A CN202010439413 A CN 202010439413A CN 111594183 A CN111594183 A CN 111594183A
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- coal seam
- blasting
- hole
- blast hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a coal seam deep hole blasting pressure relief method for improving a blasting effect by using an original pressure relief hole. The invention relates to a coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes, which comprises the following steps: constructing at least one coal seam blast hole between the large-diameter pressure relief holes, wherein the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during tunneling, the at least one coal seam blast hole and the large-diameter pressure relief holes are positioned at different heights, and the diameter of each coal seam blast hole is 40-50 mm; and blasting according to at least one coal seam blast hole. The invention utilizes the original drill hole to increase the free blasting surface, improves the blasting effect, replaces a large-diameter pressure relief hole, reduces the stress of the coal body and achieves the purpose of danger relieving and pressure relief.
Description
Technical Field
The invention relates to a coal mining technology, in particular to a coal seam deep hole blasting pressure relief method for improving a blasting effect by using an original pressure relief hole.
Background
Coal is the leading energy in China for a long time, and in the coal mining process, on the basis of taking regional measures, a rock burst mine also selects at least one specific and effective local anti-impact measure such as coal seam drilling pressure relief, coal seam blasting pressure relief, coal seam water injection, roof blasting presplitting, roof hydraulic fracturing, floor drilling or blasting pressure relief and the like.
For the coal seam with strong impact tendency, the top and bottom rock stratums are the top and bottom rock stratums with weak impact tendency, the coal seam impact risk degree is higher during construction, and in order to realize safe production of a mine, a large-diameter pressure relief drill hole needs to be constructed for pressure relief in the stoping process of a working face. Due to the limitation of field conditions, the construction space of the working face crossheading, main transportation roadway and chamber pressure relief engineering is narrow, and a large-diameter pressure relief drilling machine is inconvenient to enter.
Disclosure of Invention
The invention provides a coal seam deep hole blasting pressure relief method for improving a blasting effect by using an original pressure relief hole, which can increase a blasting free surface by using an original drill hole, improve the blasting effect, replace a large-diameter pressure relief hole, reduce the stress of a coal body and achieve the purpose of danger relief.
The invention provides a coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes, which comprises the following steps:
constructing at least one coal seam blast hole between the large-diameter pressure relief holes, wherein the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during tunneling, the at least one coal seam blast hole and the large-diameter pressure relief holes are positioned at different heights, and the diameter of each coal seam blast hole is 40-50 mm;
and blasting according to at least one coal seam blast hole.
Furthermore, the distance between the coal seam blast hole and the roadway floor is 1.2-1.5 m.
Further, the depth of the coal seam blast hole is 10-15 m.
Further, the blasting according to at least one coal seam blast hole comprises:
filling a detonation cartridge into the at least one coal seam blasting hole, wherein at least one piece of blister mud is arranged at one end of the detonation cartridge, the other end of the detonation cartridge is filled with the blister mud, and the filling length is more than or equal to 6 m;
and simultaneously detonating at least one coal seam blast hole.
Further, the blasting according to at least one coal seam blast hole still includes:
if the number of the coal seam blast holes is larger than N, the N coal seam blast holes are detonated simultaneously each time, wherein N is larger than or equal to 5 and smaller than or equal to 10, and N is a positive integer.
Further, the length of the detonation cartridge is 4-8 m.
Further, the weight of the detonation cartridge is 4-8 kg.
Further, the diameter of the coal seam blast hole is 44 mm.
The invention also provides a coal seam blast hole for improving the blasting effect by utilizing the original pressure relief holes, wherein the coal seam blast hole is constructed between the large-diameter pressure relief holes, the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during the tunneling period, at least one coal seam blast hole and the large-diameter pressure relief holes are positioned at different heights, and the diameter of the coal seam blast hole is 40-50 mm.
Further, the depth of the coal seam blast hole is 10-15 m.
According to the method for blasting and pressure relief of the coal bed deep hole by utilizing the original pressure relief hole to improve the blasting effect, the coal bed blasting hole is constructed between the original large-diameter pressure relief holes, the blasting free surface is increased by utilizing the original drill hole, the blasting effect is improved, the large-diameter pressure relief hole is replaced, the coal body stress is reduced, and the purpose of danger relief is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a first embodiment of a method for blasting and relieving pressure in a deep hole of a coal seam according to the present invention, wherein an original pressure relief hole is used to improve a blasting effect;
FIG. 2 is a top view of a coal seam in a method for deep hole blasting pressure relief of a coal seam according to the present invention, wherein the blasting effect is improved by using an original pressure relief hole;
FIG. 3 is a cross-sectional view of a coal seam in a method for blasting and depressurizing a deep hole of the coal seam by utilizing an original pressure relief hole to improve the blasting effect.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a first embodiment of a method for blasting and relieving pressure in a deep hole of a coal seam according to the present invention, wherein an original pressure relief hole is used to improve a blasting effect; FIG. 2 is a top view of a coal seam in a method for deep hole blasting pressure relief of a coal seam according to the present invention, wherein the blasting effect is improved by using an original pressure relief hole; FIG. 3 is a cross-sectional view of a coal seam in a method for blasting and depressurizing a deep hole of the coal seam by utilizing an original pressure relief hole to improve the blasting effect. Referring to fig. 1, 2 and 3, the method for blasting and decompressing a coal seam deep hole by using an original pressure relief hole to improve a blasting effect of the invention includes:
constructing at least one coal seam blast hole 22 between the large-diameter pressure relief holes 21, wherein the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during tunneling, the at least one coal seam blast hole and the large-diameter pressure relief holes are positioned at different heights, and the diameter of each coal seam blast hole is 40-50 mm;
and blasting according to at least one coal seam blast hole.
In this embodiment, large-diameter pressure relief holes have been constructed in the underground coal roadway during the tunneling period. The method in the embodiment is applied to the stoping process.
The coal seam blast hole constructed in the embodiment is a small-aperture blast hole with the diameter of 40-50 mm. Alternatively, 44 mm. The small-bore blast hole in the embodiment can be constructed by a small-sized drilling machine, a large-diameter pressure relief drilling machine is not needed, and the small-bore blast hole can be constructed under the condition that the construction space of a working face crossheading, a main transportation roadway and a pressure relief project of an underground chamber is narrow.
In this embodiment, the original large-diameter pressure relief hole has a diameter of 150mm, and a large-diameter pressure relief drilling machine is required. The original large-diameter pressure relief hole, namely the original drilled hole, is constructed by a large-diameter pressure relief drilling machine.
In this embodiment, the coal seam blastholes are constructed between the large-diameter pressure relief holes, but are not on the same horizontal plane, and the coal seam blastholes are arranged in a triangular manner at the large-diameter pressure relief holes on both sides.
The method is suitable for the construction site to select the roadway in which the large-diameter pressure relief hole is constructed during the tunneling and the pressure relief engineering still needs to be carried out during the stoping. And determining that the large-diameter pressure relief holes in the construction range still have partial length and incomplete collapse holes through the through holes.
Optionally, the depth of the coal seam blasting hole is 10-15 m.
Optionally, the distance between the coal seam blast hole and the roadway floor is 1.2-1.5 m.
Optionally, the blasting according to at least one coal seam blast hole includes:
filling a detonation cartridge into the at least one coal seam blasting hole, wherein at least one piece of blister mud is arranged at one end of the detonation cartridge, the other end of the detonation cartridge is filled with the blister mud, and the filling length is more than or equal to 6 m;
and simultaneously detonating at least one coal seam blast hole.
The blasting according to at least one coal seam blast hole still includes:
if the number of the coal seam blast holes is larger than N, the N coal seam blast holes are detonated simultaneously each time, wherein N is larger than or equal to 5 and smaller than or equal to 10, and N is a positive integer.
Optionally, the length of the detonation cartridge is 4-8 m.
Optionally, the weight of the detonation cartridge is 4-8 kg.
In this embodiment, after the coal seam blast hole is constructed, the coal seam blast hole is detonated. In particular, multiple holes can be detonated simultaneously. Specifically, 5-7 holes can be detonated simultaneously.
In another aspect, the invention further provides a coal seam blast hole for improving blasting effect by using original pressure relief holes, and as shown in fig. 2-3, specifically, the coal seam blast hole is constructed between large-diameter pressure relief holes, the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during tunneling, at least one coal seam blast hole and the large-diameter pressure relief holes are located at different heights, and the diameter of the coal seam blast hole is 40-50 mm.
Optionally, the depth of the coal seam blasting hole is 10-15 m.
In this embodiment, the coal seam blast hole is a coal seam blast hole corresponding to the coal seam deep hole blasting pressure relief method for improving the blasting effect by using the original pressure relief hole shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.
According to the method for blasting and pressure relief of the coal bed deep hole by utilizing the original pressure relief hole to improve the blasting effect, the coal bed blasting hole is constructed between the original large-diameter pressure relief holes, the blasting free surface is increased by utilizing the original drill hole, the blasting effect is improved, the large-diameter pressure relief hole is replaced, the coal body stress is reduced, and the purpose of danger relief is achieved.
The invention solves the problem of difficult construction of pressure relief engineering in a narrow operation space to a certain extent, and the method of enhancing the blasting effect by using the original large-diameter pressure relief hole as a free surface has certain innovation and popularization value and certain social benefit.
The invention adopts the small-aperture blasting ratio and the large-diameter pressure relief holes, which can greatly reduce the construction cost and bring economic benefits. The technology can be developed in all coal roadways in the whole mine.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A coal seam deep hole blasting pressure relief method for improving blasting effect by utilizing original pressure relief holes is characterized by comprising the following steps:
constructing at least one coal seam blast hole between the large-diameter pressure relief holes, wherein the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during tunneling, the at least one coal seam blast hole and the large-diameter pressure relief holes are positioned at different heights, and the diameter of each coal seam blast hole is 40-50 mm;
and blasting according to at least one coal seam blast hole.
2. The method of claim 1,
the distance between the coal seam blast hole and the roadway floor is 1.2-1.5 m.
3. The method of claim 1,
the depth of the coal seam blast hole is 10-15 m.
4. The method of claim 1,
blasting according to at least one coal seam blast hole includes:
filling a detonation cartridge into the at least one coal seam blasting hole, wherein at least one piece of blister mud is arranged at one end of the detonation cartridge, the other end of the detonation cartridge is filled with the blister mud, and the filling length is more than or equal to 6 m;
and simultaneously detonating at least one coal seam blast hole.
5. The method of claim 4,
the blasting according to at least one coal seam blast hole still includes:
if the number of the coal seam blast holes is larger than N, the N coal seam blast holes are detonated simultaneously each time, wherein N is larger than or equal to 5 and smaller than or equal to 10, and N is a positive integer.
6. The method of claim 4,
the length of the detonation cartridge is 4-8 m.
7. The method of claim 4,
the weight of the detonation cartridge is 4-8 kg.
8. The method of claim 1,
the diameter of the coal seam blast hole is 44 mm.
9. The coal seam blast hole capable of improving the blasting effect by utilizing the original pressure relief holes is characterized in that the coal seam blast hole is constructed between large-diameter pressure relief holes, the large-diameter pressure relief holes are at least two large-diameter pressure relief holes, the large-diameter pressure relief holes are constructed during the tunneling period, at least one coal seam blast hole and the large-diameter pressure relief holes are located at different heights, and the diameter of each coal seam blast hole is 40-50 mm.
10. The coal seam blast hole of claim 9, wherein said coal seam blast hole is 10-15m deep.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010439413.5A CN111594183A (en) | 2020-05-21 | 2020-05-21 | Coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010439413.5A CN111594183A (en) | 2020-05-21 | 2020-05-21 | Coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111594183A true CN111594183A (en) | 2020-08-28 |
Family
ID=72180687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010439413.5A Pending CN111594183A (en) | 2020-05-21 | 2020-05-21 | Coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111594183A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855123A (en) * | 2021-01-19 | 2021-05-28 | 兖州煤业股份有限公司 | Method for determining depth of large-diameter pressure relief drill hole |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055036A (en) * | 1990-12-28 | 1991-10-02 | 煤炭科学研究总院抚顺分院 | Deep hole control pressure relief blasting protrusion-dispelling technology, technology and equipment |
| US5232268A (en) * | 1992-04-01 | 1993-08-03 | Dynatec Mining Limited | Method of breaking a full face of rock for constructing shafts and tunnels |
| CN101614134A (en) * | 2009-07-15 | 2009-12-30 | 中国矿业大学 | Drilling, blasting and pumping three-in-one pressure relief and anti-outburst method |
| CN102518471A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Rock burst energy releasing method of roadway of high stress area in coal mine |
| CN106401588A (en) * | 2016-10-20 | 2017-02-15 | 山东科技大学 | Method for preventing and treating rock burst during exploiting of working face in fault zone |
| CN106567710A (en) * | 2016-10-18 | 2017-04-19 | 安徽理工大学 | Rapid coal uncovering method with effects of uniform pressure releasing and integrated collapse |
| CN106948817A (en) * | 2017-05-12 | 2017-07-14 | 山东新河矿业有限公司 | Rock burst prevention and control method combining bottom coal drilling with blasting pressure relief |
-
2020
- 2020-05-21 CN CN202010439413.5A patent/CN111594183A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055036A (en) * | 1990-12-28 | 1991-10-02 | 煤炭科学研究总院抚顺分院 | Deep hole control pressure relief blasting protrusion-dispelling technology, technology and equipment |
| US5232268A (en) * | 1992-04-01 | 1993-08-03 | Dynatec Mining Limited | Method of breaking a full face of rock for constructing shafts and tunnels |
| US5232268B1 (en) * | 1992-04-01 | 1995-05-09 | Dynatec International Limited | Method of breaking a full face of rock for constructing shafts and tunnels |
| US5232268B2 (en) * | 1992-04-01 | 1996-10-15 | Dynatec International Limited | Method of breaking a full face of rock for constructing shafts and tunnels |
| CN101614134A (en) * | 2009-07-15 | 2009-12-30 | 中国矿业大学 | Drilling, blasting and pumping three-in-one pressure relief and anti-outburst method |
| CN102518471A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Rock burst energy releasing method of roadway of high stress area in coal mine |
| CN106567710A (en) * | 2016-10-18 | 2017-04-19 | 安徽理工大学 | Rapid coal uncovering method with effects of uniform pressure releasing and integrated collapse |
| CN106401588A (en) * | 2016-10-20 | 2017-02-15 | 山东科技大学 | Method for preventing and treating rock burst during exploiting of working face in fault zone |
| CN106948817A (en) * | 2017-05-12 | 2017-07-14 | 山东新河矿业有限公司 | Rock burst prevention and control method combining bottom coal drilling with blasting pressure relief |
Non-Patent Citations (1)
| Title |
|---|
| 辽宁省劳动局等: "《矿山安全卫生管理》", 31 August 1990, 东北工学院出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855123A (en) * | 2021-01-19 | 2021-05-28 | 兖州煤业股份有限公司 | Method for determining depth of large-diameter pressure relief drill hole |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102678120B (en) | Method for releasing pressure and removing danger of rock burst | |
| CN104989405B (en) | Mining steeply dipping coal seam bump orients prevention and controls | |
| CN106368701B (en) | The method and device in lane is stayed using hydraulic fracturing release control stope drift active workings | |
| CN103195466B (en) | A kind of directed hydraulic pressure demolition improves the method for gas permeability of coal seam | |
| CN102678117B (en) | Directional hydraulic fracturing method based on energizing blasting | |
| CN113404535B (en) | Method for preventing rock burst by hydraulic fracturing of coal mine underground | |
| CN103498680B (en) | Improve the method for fully mechanized coal face period of beginning mining top-coal recovery rate | |
| CN103161493B (en) | Gas-liquid-solid three-phase coupling blasting weakening rock burst and permeability increasing method | |
| CN104329113B (en) | A kind of method of surface drilling standing seat earth release mash gas extraction | |
| CN105545307A (en) | Method for over-pit and under-pit cooperative control of roofs of far and near fields of extra-large stoping space | |
| CN107120137B (en) | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method | |
| CN112593936B (en) | Advanced comprehensive control method for multi-disaster area of deep mine | |
| CN109209472A (en) | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple | |
| CN101876520A (en) | Segment pre-blasting technology for steeply dipping hard coal seam roof | |
| CN102031775B (en) | Construction technology of drilled pile in hard oblique rocks by medium hole blasting | |
| CN113339065A (en) | Method for preventing rock burst of gob-side multi-coal-pillar stoping roadway | |
| CN103411493A (en) | Drilling and powder charging method for goaf-penetrating deep hole presplitting blasting | |
| CN113107490A (en) | Roof cutting and pressure relief method for high-ground-stress hard roof of coal mine | |
| CN109915143A (en) | Prevention and control method of rock burst in coal pillar working face of unequal width road protection | |
| CN106761750B (en) | Slot type recovery method is built in the longwell plane milling of half-edge coal seam longitudinal direction | |
| CN102296957B (en) | Method of transfixing and distressing with one explosion during tunneling of seam roadway with rock burst | |
| CN114320297A (en) | Steep dip thin ore vein large diameter deep hole mining method | |
| CN107227976A (en) | A kind of underground pressure management method suitable for underground mine deep mining | |
| CN108930536A (en) | A kind of method of gob side entry retaining first advance high pressure water injection fracturing tight roof | |
| CN103061732A (en) | Hydraulic fracturing method of 2-3 meter hard medium sandstone stratum of roof of coal seam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200828 |
|
| RJ01 | Rejection of invention patent application after publication |