CN104863588A - Advanced pier column pre-arranging gob-side entry retaining method - Google Patents
Advanced pier column pre-arranging gob-side entry retaining method Download PDFInfo
- Publication number
- CN104863588A CN104863588A CN201510137704.8A CN201510137704A CN104863588A CN 104863588 A CN104863588 A CN 104863588A CN 201510137704 A CN201510137704 A CN 201510137704A CN 104863588 A CN104863588 A CN 104863588A
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- China
- Prior art keywords
- pier stud
- gob
- entry retaining
- side entry
- roadway
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The present invention discloses an advanced pier column pre-arranging gob-side entry retaining method, which comprises: arranging pier columns on the middle portion of a roadway according to row spacing after digging the roadway so as to make both sides of the pier column respectively design the cross-section sizes for the current work surface mining roadway and the next work surface mining roadway; along with the mining performing of the current work surface, retaining the next work surface mining roadway by using the pier columns as the roadway side support bodies; and during the next work surface mining performing process, recovering the pier columns on the rear of the work surface in a one-by-one manner. According to the present invention, the pier columns pre-arranged in the advanced manner are utilized to provide the active cutting-supporting control effect for the gob-side entry retaining top plate, such that the gob-side entry retaining success is ensured while the advantages of roadway side support body construction work safety, no limitation of the roadway side support body construction on the current work surface mining speed, pier column recovering, low cost of the gob-side entry retaining, and the like are provided, and the method is suitable for coal mine mining.
Description
Technical field
The present invention relates to a kind of advanced default pier stud gob-side entry retaining method, it belongs to roadway surrounding rock control field.
Background technology
Edge air gallery technology is as the large branch without coal pillar mining technology, and the Technological Economy superiority had is self-evident, makes this technology have wide popularizing application prospect; The initial scientific meaning of gob side entry retaining is in this working face extraction process, roadside support body is constructed along edge, goaf immediately following work plane, tunnel is remained, a tunnel as lower work plane uses, and the roadside support body constructed has close standing props, spoil bag, high percentage of water rapid solidifying material filling wall, concrete material filling wall, ointment material filling wall, concrete block etc.; But on-the-spot application shows, above-mentioned gob side entry retaining mode has certain drawback: (1) constructs roadside support body and working face extraction speed restricts mutually; (2) constructing roadside support body is carry out in one piece of narrow space in goaf, face end rear, and operation danger is larger; (3) for roadside support bodies such as close standing props, spoil bags, there is the deficiency that preliminary bracing resistance is little, and for roadside support bodies such as high percentage of water rapid solidifying material filling wall, concrete material filling wall, ointment material filling wall, concrete blocks, filling system is complicated, and cost is higher; Above-mentioned deficiency can seriously hinder applying of edge air gallery technology undoubtedly.
Summary of the invention
Goal of the invention: for solving above-mentioned deficiency of the prior art, promote edge air gallery technology development, the invention provides a kind of construction safety, this working face extraction speed is not restricted, the advanced default pier stud gob-side entry retaining method that cost is low.
Technical scheme: for achieving the above object, the technical solution adopted in the present invention is:
(1) design section parameter digging laneway is pressed;
(2) install pier stud at tunnel near middle according to array pitch, make pier stud both sides be respectively this working face extraction tunnel and lower working face extraction tunnel design section size;
(3) this working face extraction advances, and in process, work plane rear top board ruptures along pier stud at goaf side, is remained in lower working face extraction tunnel using pier stud as roadside support body;
(4) under, working face extraction advances, and in process, is reclaimed by pier stud near work plane rear by root.
Further, in described step (1), the width in tunnel is this working face extraction tunnel design width, lower working face extraction tunnel design width and pier stud diameter three sum.
Further, described pier stud is peripheral to be made up of two joint seamless circular steel pipes, and upper joint pipe diameter is more bigger than lower joint outer diameter of steel pipes, and inside is sandstone filler.
Further, described pier stud array pitch is determined by self load-carrying properties and roadway surrounding rock mechanics parameter.
Further, described pier stud saves steel pipe top and be provided with and fill Sha Kou, be provided with bottom lower joint steel pipe and let out sand mouth.
Beneficial effect:
(1), when installing pier stud, injecting sandstone filler by filling sand mouth, pier stud can be made to have certain preliminary bracing resistance, make it can safeguard Wide Band Oxygen Sensors stability of the roadway as supporting and protection structure, for the successful implementation of gob side entry retaining lays the foundation;
(2) roadside support body pier stud adopts advanced reserved, and the drawing speed of this work plane can not be subject to roadside support body and construct restriction;
(3) install pier stud at Wide Band Oxygen Sensors tunnel near middle, operating environment is well-to-do, dangerous little;
(4) architectural feature of pier stud makes it while having certain Support Resistance, also have certain contracted amount, gob side entry retaining Rule of roof movement of coal can well be adapted to, top board is played to " cut off-support " control action of active, for the successful implementation of gob side entry retaining lays the foundation;
(5) pier stud is provided with and fills sand mouth and let out sand mouth, namely facilitates the formation with active support resistance of installing of pier stud, also makes the recovery of pier stud become possibility, be applicable to coal mining.
Accompanying drawing explanation
Fig. 1 is that advanced pier stud gob side entry retaining of presetting arranges top view;
Fig. 2 is that advanced pier stud gob side entry retaining of presetting arranges profile;
Fig. 3 is pillarwork schematic diagram;
Fig. 4 is for the A-A of pier stud shown in Fig. 3 is to cross-sectional view;
Fig. 5 is for the B-B of pier stud shown in Fig. 3 is to cross-sectional view.
In figure: 1-tunnel, 2-pier stud, this working face extraction of 3-tunnel, working face extraction tunnel under 4-, this work plane of 5-, work plane under 6-, 7-goaf, 8-sandstone filler, 9-saves steel pipe, and save steel pipe under 10-, 11-fills Sha Kou, and 12-lets out sand mouth.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-5, the specific embodiment of the present invention is described in further detail.
The nervous situation of excavation replacement that certain ore deposit faces for alleviation, improve high-quality coal resource recovery ratio, working face extraction roadway layout have employed advanced reserved pier stud edge air gallery technology, and concrete implementation step is as follows:
1) first tunnel a light section rectangular shaped roadways (clear span × clear height: 4000mm × 3000mm), then brushing forms complete tunnel (1) to design section size (clear span × clear height: 6400mm × 3000mm);
2) delayed brushing work plane 20m, assemble steel pipe 9,10 at tunnel 1 near middle and inject sandstone filler 8 by filling sand mouth 11, install pier stud 2 one by one according to array pitch 1.5m, make pier stud 2 both sides be respectively this working face extraction tunnel 3 and lower working face extraction tunnel 4 design section size (being clear span × clear height: 3000mm × 3000mm);
3) this work plane 5 back production advances, and in process, lower working face extraction tunnel 4, remains using pier stud 2 as roadside support body along pier stud 2 in the fracture of side, goaf 7 by work plane rear top board; Let out on sand mouth 12 and be furnished with flashboard.
4) under, work plane 6 back production advances, and in process, releasing sandstone filler 8 in steel pipe, then being reclaimed by root by pier stud 2 near work plane rear by letting out sand mouth 12.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (5)
1. an advanced default pier stud gob-side entry retaining method, comprises the steps:
1) design section parameter digging laneway (1) is pressed;
2) install pier stud (2) at tunnel (1) near middle according to array pitch, make pier stud (2) both sides be respectively this working face extraction tunnel (3) and lower working face extraction tunnel (4) design section size;
3) this work plane (5) back production advances, and in process, lower working face extraction tunnel (4), remains using pier stud (2) as roadside support body along pier stud (2) in the fracture of goaf (7) side by work plane rear top board;
4) under, work plane (6) back production advances, and in process, is reclaimed by pier stud (2) near work plane rear by root.
2. one according to claim 1 presets pier stud gob-side entry retaining method in advance, it is characterized in that: in described step 1), the width of tunnel (1) is this working face extraction tunnel (3) design width, lower working face extraction tunnel (4) design width and pier stud (2) diameter three sum.
3. one according to claim 1 presets pier stud gob-side entry retaining method in advance, it is characterized in that: described pier stud (2) is peripheral to be made up of two joint seamless circular steel pipes, upper joint steel pipe (9) internal diameter is more bigger than lower joint steel pipe (10) external diameter, and inside is sandstone filler (8).
4. one according to claim 1 presets pier stud gob-side entry retaining method in advance, it is characterized in that: described pier stud (2) array pitch is determined by self load-carrying properties and roadway surrounding rock mechanics parameter.
5. one according to claim 1 presets pier stud gob-side entry retaining method in advance, it is characterized in that: described pier stud (2) saves steel pipe (9) top and be provided with and fill Sha Kou (11), and lower joint steel pipe (10) bottom is provided with lets out sand mouth (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510137704.8A CN104863588A (en) | 2015-03-26 | 2015-03-26 | Advanced pier column pre-arranging gob-side entry retaining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510137704.8A CN104863588A (en) | 2015-03-26 | 2015-03-26 | Advanced pier column pre-arranging gob-side entry retaining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104863588A true CN104863588A (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510137704.8A Pending CN104863588A (en) | 2015-03-26 | 2015-03-26 | Advanced pier column pre-arranging gob-side entry retaining method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829762A (en) * | 2017-10-31 | 2018-03-23 | 中国矿业大学(北京) | A kind of adaptive supporting pier stud and its method for protecting support |
| CN107882566A (en) * | 2017-10-31 | 2018-04-06 | 中国矿业大学(北京) | A kind of gob-side entry retaining method for not influenceing coal mining process |
| CN110939464A (en) * | 2019-11-29 | 2020-03-31 | 天地科技股份有限公司 | Gob-side entry retaining combined supporting method for adjacent working faces |
| CN113931685A (en) * | 2020-07-14 | 2022-01-14 | 天地科技股份有限公司 | Support method for underground mining |
| CN107829762B (en) * | 2017-10-31 | 2023-11-10 | 中国矿业大学(北京) | Self-adaptive support pier column and support method thereof |
-
2015
- 2015-03-26 CN CN201510137704.8A patent/CN104863588A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829762A (en) * | 2017-10-31 | 2018-03-23 | 中国矿业大学(北京) | A kind of adaptive supporting pier stud and its method for protecting support |
| CN107882566A (en) * | 2017-10-31 | 2018-04-06 | 中国矿业大学(北京) | A kind of gob-side entry retaining method for not influenceing coal mining process |
| CN107882566B (en) * | 2017-10-31 | 2019-10-25 | 中国矿业大学(北京) | A kind of gob-side entry retaining method not influencing coal mining process |
| CN107829762B (en) * | 2017-10-31 | 2023-11-10 | 中国矿业大学(北京) | Self-adaptive support pier column and support method thereof |
| CN110939464A (en) * | 2019-11-29 | 2020-03-31 | 天地科技股份有限公司 | Gob-side entry retaining combined supporting method for adjacent working faces |
| CN113931685A (en) * | 2020-07-14 | 2022-01-14 | 天地科技股份有限公司 | Support method for underground mining |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150826 |