CN113323665A - Stability control method for opencast coal mine to boundary soft rock end slope - Google Patents
Stability control method for opencast coal mine to boundary soft rock end slope Download PDFInfo
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- CN113323665A CN113323665A CN202110729268.9A CN202110729268A CN113323665A CN 113323665 A CN113323665 A CN 113323665A CN 202110729268 A CN202110729268 A CN 202110729268A CN 113323665 A CN113323665 A CN 113323665A
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- Prior art keywords
- coal mine
- soft rock
- end slope
- boundary
- stability
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003245 coal Substances 0.000 title claims abstract description 27
- 239000011435 rock Substances 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000013016 damping Methods 0.000 claims abstract description 20
- 238000005422 blasting Methods 0.000 claims abstract description 12
- 229920005549 butyl rubber Polymers 0.000 claims description 4
- 230000005465 channeling Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/28—Methods of surface 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
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a method for controlling stability of an end slope from an open pit coal mine to boundary soft rock, which comprises the following steps: 1) carrying out channeling on the end slope step transportation flat disc; 2) filling damping materials in the grooves obtained in the step 1); 3) pre-splitting blasting is carried out on the working wall; 4) and (4) propelling the working slope until an end slope reaching the boundary is formed, and completing the stability control of the soft rock end slope of the opencast coal mine.
Description
Technical Field
The invention belongs to the field of open pit coal mining, and relates to a method for controlling stability of an open pit coal mine to boundary soft rock end slope.
Background
The output of open pit coal mines in China is continuously improved in the energy structure proportion, and the exposed side slope area is also continuously increased every year. After the end slope is exploited to the boundary by leaning on the slope, the width of the flat plate of the end slope is small, and no space is available for traditional slope supporting modes such as slope pressing or grouting. Meanwhile, the side slope of the open pit coal mine mainly comprises soft rock, the mechanical property of the rock mass of the side slope is poor, the side slope can be disturbed in blasting and transportation links, and serious people can cause the side slope to slide, so that great safety threat is brought to equipment personnel of the mine. Taking blasting as an example, the presplitting blasting method generally adopted can only reduce the vibration influence on the steps of the end slope with the same level, but can not reduce the vibration on the steps at the lower part. Therefore, how to reduce the influence of production links such as blasting on the stability of the boundary soft rock end slope is always an important issue of the open pit coal mine, and the problem is difficult to solve by the existing scheme.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for controlling the stability of an end slope from an open pit coal mine to boundary soft rock, which can effectively reduce the influence of a production link on the stability of the end slope.
In order to achieve the aim, the method for controlling the stability of the end slope from the open pit coal mine to the boundary soft rock comprises the following steps:
1) carrying out channeling on the step transportation flat disc of the end slope;
2) filling damping materials in the grooves obtained in the step 1);
3) pre-splitting blasting is carried out on the working wall;
4) and (4) pushing the working slope until an end slope reaching the boundary is formed, and finishing the stability control of the soft rock end slope of the opencast coal mine.
The damping material is butyl rubber.
The method also comprises the following steps between the step 2) and the step 3): and (4) chiseling pre-split blast holes on the working wall and the end wall.
The width of the slot obtained in step 1) is 2000 mm.
The depth of the groove obtained in step 1) is 5540 mm.
In the step 1), cutting is carried out at the center line of the step transportation flat plate in the end slope.
And in the step 1), a hydraulic excavator is used for carrying out undermining on the step transportation flat disc of the end slope.
The groove obtained in the step 1) is connected with the step slope toe of the working side.
In the step 2), filling damping materials in the groove obtained in the step 1), and then capping the groove.
The capping material is concrete.
The invention has the following beneficial effects:
according to the method for controlling stability of the end slope from the open pit coal mine to the boundary soft rock, when the method is specifically operated, the cut is performed on the step operation flat disc, then the damping material is filled, and in the generation process, the damping material is used for performing energy consumption deformation, so that the influence of the production process on the stability of the end slope is reduced, and the stability of the end slope can be improved when the inner row is not followed; in addition, the method can be operated in the limited space of the end slope, does not change the existing open pit coal mine production process, and is convenient and simple to operate and easy to realize.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the present invention.
Wherein, 1 is an end slope, 2 is a damping material, 3 is concrete, 4 is a working slope, 5 is a blasting position, 101 is a step transportation flat disc, 102 is a groove, 401 is a step toe, and 501 is a pre-splitting blast hole.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. 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.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the method for controlling stability of the end slope from the opencast coal mine to the boundary soft rock comprises the following steps:
1) and performing undercutting 102 on the step transportation flat disc 101 of the end slope 1, wherein the position of the undercutting 102 is at the middle position of the step transportation flat disc 101 in the end slope 1, and when in use, a hydraulic excavator is adopted to perform undercutting 102, the depth of the groove 102 is 5540mm, and the width of the groove 102 is 2000 mm.
The groove 102 is connected to a step toe 401 of the working upper 4.
2) Filling damping materials 2 in the grooves 102 obtained in the step 1);
in order to prevent sunlight from directly irradiating the damping material 2, the damping material 2 is filled in the groove 102, and then the concrete 3 is used for capping.
In the generating process, the damping material 2 is used for damping and energy consumption so as to continuously damp, and the influence on the stability of the end slope 1 is reduced.
The damping material 2 is butyl rubber, the butyl rubber is synthesized by isobutene and a small amount of isoprene, seismic waves generated in the blasting process can be absorbed, and the brittle temperature is-79 ℃.
3) Pre-splitting blasting is carried out on the working slope 4;
it should be noted that, during construction, pre-splitting blastholes 501 are first drilled in the working wall 4 and the end wall 1, and then pre-splitting blasting is performed on the working wall 4, so that the influence of seismic waves on the end wall 1 in the blasting process is reduced, and the influence on the stability of the end wall 1 is further reduced.
4) And (4) pushing the working slope 4 until the end slope 1 reaching the boundary is formed, and finishing the stability control of the soft rock end slope of the opencast coal mine.
It should be noted that, in the invention, the undercut 102 is performed on the step running flat disc, then the damping material 2 is filled, and in the generation process, the damping material 2 is used for energy dissipation deformation, so as to reduce the influence of the production process on the stability of the end wall 1. In addition, the groove 102 is capped, so that the influence of sunlight on the service life of the damping material 2 caused by direct incidence of the damping material 2 is avoided, and the stability of the end slope 1 can be improved when the inner row is not followed; in addition, it is possible to operate in a limited space of the end slope 1.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A method for controlling stability of an opencast coal mine from a boundary soft rock end slope is characterized by comprising the following steps:
1) performing undercutting (102) on a step transportation flat disc (101) of the end slope (1);
2) filling damping materials (2) in the grooves (102) obtained in the step 1);
3) pre-splitting blasting is carried out on the working upper (4);
4) and (4) pushing the working slope (4) until an end slope (1) reaching the boundary is formed, and completing the stability control of the soft rock end slope of the opencast coal mine.
2. The method for controlling stability of an opencast coal mine to boundary soft rock end slope according to claim 1, wherein the damping material (2) is butyl rubber.
3. The method for controlling stability of an open pit coal mine to a boundary soft rock end slope according to claim 1, further comprising, between step 2) and step 3): pre-split blast holes (501) are chiseled on the working wall (4) and the end wall (1).
4. The method for controlling highwall stability of an open pit coal mine to boundary soft rock according to claim 1, wherein the width of the slot (102) obtained in step 1) is 2000 mm.
5. The method for controlling stability of an open pit coal mine to a boundary soft rock end slope according to claim 1, wherein the depth of the groove (102) obtained in step 1) is 5540 mm.
6. The method for controlling stability of an open pit coal mine to soft rock endslope according to claim 1, wherein in step 1) the cut (102) is made at the centerline of the step transporting deck (101) in the endslope (1).
7. The method for controlling stability of an opencast coal mine to boundary soft rock endslope according to claim 1, wherein in step 1) the undercutting (102) is performed on the step transportation plate (101) of the endslope (1) by means of a hydraulic excavator.
8. The method for controlling stability of an open pit coal mine to a boundary soft rock end slope according to claim 1, characterized in that the trough (102) obtained in step 1) is connected with a step toe (401) of the working slope (4).
9. The method for controlling stability of an opencast coal mine to a boundary soft rock end slope according to claim 1, wherein in the step 2), the slot (102) obtained in the step 1) is filled with a damping material (2), and then the slot (102) is capped.
10. The method of controlling highwall stability in an open pit coal mine to boundary soft rock according to claim 9, wherein the capping material is concrete (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729268.9A CN113323665A (en) | 2021-06-29 | 2021-06-29 | Stability control method for opencast coal mine to boundary soft rock end slope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729268.9A CN113323665A (en) | 2021-06-29 | 2021-06-29 | Stability control method for opencast coal mine to boundary soft rock end slope |
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| CN113323665A true CN113323665A (en) | 2021-08-31 |
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| CN202110729268.9A Pending CN113323665A (en) | 2021-06-29 | 2021-06-29 | Stability control method for opencast coal mine to boundary soft rock end slope |
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|---|---|---|---|---|
| JPS55122928A (en) * | 1979-03-15 | 1980-09-22 | Chiyoda Chem Eng & Constr Co Ltd | Vibration-proof groove |
| RU2015331C1 (en) * | 1990-10-08 | 1994-06-30 | Гальянов Алексей Владимирович | Method for opencast mining of ore deposits |
| RU2002119188A (en) * | 2002-07-16 | 2004-01-20 | Институт горного дела Сибирского отделени РАН (статус государственного учреждени ) | The method of mining blocks of stone |
| JP2005009144A (en) * | 2003-06-18 | 2005-01-13 | Yakumo Kk | Soil for measure against vibration of ground, underground wall/bottom wall for measure against vibration of ground, and construction method for underground wall/bottom wall for measure against vibration of ground |
| CN104564077A (en) * | 2014-12-22 | 2015-04-29 | 中国神华能源股份有限公司 | Coal exploitation and transportation process for open coal mine |
| CN104806265A (en) * | 2015-03-31 | 2015-07-29 | 辽宁工程技术大学 | Impact ground pressure preventing method of full seam gateway |
| CN104819671A (en) * | 2015-05-06 | 2015-08-05 | 武汉爆破有限公司 | Dust settling and shock absorbing method for building blasting demolition |
| CN108716880A (en) * | 2018-06-08 | 2018-10-30 | 中国科学院武汉岩土力学研究所 | A kind of device and construction method improving water-filling shock relieve vent abatement blasting vibration effect |
| CN211975051U (en) * | 2019-12-19 | 2020-11-20 | 中煤能源研究院有限责任公司 | Filling equipment for open-air end slope coal-pressing filling mining |
| CN112983525A (en) * | 2021-03-12 | 2021-06-18 | 中国矿业大学 | Inner soil discharge yard ditch remaining discharge method beneficial to ventilation of near-horizontal opencast coal mine stope |
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2021
- 2021-06-29 CN CN202110729268.9A patent/CN113323665A/en active Pending
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| JPS55122928A (en) * | 1979-03-15 | 1980-09-22 | Chiyoda Chem Eng & Constr Co Ltd | Vibration-proof groove |
| RU2015331C1 (en) * | 1990-10-08 | 1994-06-30 | Гальянов Алексей Владимирович | Method for opencast mining of ore deposits |
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| JP2005009144A (en) * | 2003-06-18 | 2005-01-13 | Yakumo Kk | Soil for measure against vibration of ground, underground wall/bottom wall for measure against vibration of ground, and construction method for underground wall/bottom wall for measure against vibration of ground |
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| CN108716880A (en) * | 2018-06-08 | 2018-10-30 | 中国科学院武汉岩土力学研究所 | A kind of device and construction method improving water-filling shock relieve vent abatement blasting vibration effect |
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