CN102518447A - Roadway layout method for controlling roadway floor heave - Google Patents
Roadway layout method for controlling roadway floor heave Download PDFInfo
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- CN102518447A CN102518447A CN2011103660226A CN201110366022A CN102518447A CN 102518447 A CN102518447 A CN 102518447A CN 2011103660226 A CN2011103660226 A CN 2011103660226A CN 201110366022 A CN201110366022 A CN 201110366022A CN 102518447 A CN102518447 A CN 102518447A
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Abstract
The invention discloses a roadway layout method for controlling roadway floor heave. A roadway is arranged above a coal bed floor to ensure that the integrity of the floor surface is not destroyed. The roadway layout method for controlling roadway floor heave is applied to a roadway layout with length of 1200 meters, and the floor heave phenomenon does not occur any more, thereby fundamentally controlling the roadway floor heave.
Description
Technical field
Patent of the present invention relates to the method for arranging in coal mining tunnel
Background technology
In coal mining, the phenomenon that roadway floor bloats often takes place, this phenomenon becomes the tunnel pucking.At present, more the following aspects that mainly contains of the method for preventing and treating of tunnel pucking:
1, rational roadway arrangement
On time and space, avoid the influence of digging activity as far as possible, with roadway arrangement behind seam mining in the formed stress relaxed area territory.2. should avoid the strong effect of bearing pressure stack as far as possible, perhaps shorten the bearing pressure influence time as far as possible.3. in the distance range that mining system allows, select stable rock stratum or coal seam to arrange the tunnel, avoid water directly to contact as far as possible with soft expansion rock stratum.4. the tunnel is when the geological structure band, axially should try one's best vertical fault structural belt or to, arch structure of tunnel.5. select rational rock pillar width between adjacent tunnel or the chamber.6. the axis direction in tunnel is parallel with the tectonic stress direction as far as possible, avoids vertical with the tectonic stress direction.
2, on base plate, beat the bolt anchorage base plate.
3, floor grouting is used to reinforce fragmented rock, improves the ability of the anti-pucking in rock stratum.
4, pot hole blasting becomes gyalectiform in the borehole first light charge explosion in bottom, and again with charge explosion, broken rock is not surperficial.The essence of this method is near the seat earth of tunnel-surrounding, to form the rock loosening belt with blasting procedure, because tunnel stone loosening belt, the maximal support pressure transfer is to rock mass and coal column deep.
5, adopt the totally enclosed type excavation support, comprise supporting of base plate.
Though said method 2-4 is played a role, the control cost is higher, though method 1 is played a role, Consideration is complicated, and the tunnel is not easy to arrange.
Find that after deliberation the reason that causes the tunnel pucking is many-sided, but main cause is: except minable coal seam, also have more unworkable coal seam in the coal measure strata; These coal seams belong to softer rock stratum; Because they in the recovery process of minable coal seam, receive the influence of mine pressure, integral body receives vertical compression; The situation next part combinate form that can't change at volume becomes potential energy; Rock stratum is up and down produced normality stress, and when producing weak area such as crack, disrumpent feelings, structure when surrounding rock body, this potential energy just makes the roadway floor projection in weak area form pucking.
In addition, in roadway arrangement, adopt along roof arranged preparatory working and stope drift active workings more; When head-room during greater than the coal seam height; And the coal seam all is skewed, so an angle of seat earth is removed, makes base plate get surface integrity and is destroyed; Lose bending resistance, the tunnel has more serious at present pucking.This phenomenon can explain like this that corn stalk is not easy to break, bamboo pole is difficult for bending is that high-intensity iron and steel casting can be that surface integrity is destroyed because of cutting slot is disrumpent feelings because surface integrity is arranged.
Summary of the invention
According to the principle of above-mentioned roadway floor generation pucking, the present invention proposes a kind of tunnel method for designing of preventing and treating the base plate pucking.
For achieving the above object, method for arranging of the present invention is: roadway arrangement more than seat earth, is not damaged with the integrality that guarantees backplate surface.
Advantage of the present invention is: the roadway arrangement method of this control tunnel pucking; The inventor uses in 1200 meters roadway arrangement altogether, never finds the pucking phenomenon again, though that this method seems is simple; But before the present invention; Those skilled in the art do not recognize the true cause that the base plate pucking takes place, so also do not expect method for arranging of the present invention at all, technical scheme of the present invention thus has obvious improvement.
Description of drawings
Fig. 1 is roadway arrangement figure of the present invention.
The specific embodiment
As can beappreciated from fig. 1, the present invention be with roadway arrangement more than seat earth.
In order to verify advantage of the present invention, roadway arrangement method of the present invention is utilized on Sheng spring mining company 11 coal seams and 15 coal seams.
Contain spring mining company 11 coal seams and be positioned at group middle part, Taiyuan, last apart from the average 92.25m in 6 coal seams, following coal is thick between 1.37～2.2m apart from 13 coal seam 40.5m, and average thick is 1.74m, and 11 coal seam roof and floors: false roof is an arenaceous shale, thick 0.07m, grey, argillaceous agglutination.Immediate roof is the gray powder sandstone, thick 1.43～7.56m, average 4.5m, calcium argillaceous agglutination, compact structure.Old top is alternate with the gray powder sandstone for greyish white packsand, thick 5.05～24.61m, average 16.0m.Directly the end is an argillaceous rocks, thick 0.03～0.10m, and average 0.08m, canescence is met water and is prone to expand deliquescing.Past is siltstone, thick 0～3.55m, and average 2.46m, Dark grey, property is crisp, joints development, hardness is medium.2.5m is 12 coal seams of thick 0.10m under it, and ature of coal is relatively poor.
15 layers of coal are positioned at group bottom, Taiyuan, and are last apart from 13 layers of average 13m of coal, following to 16 layers of coal 1.55m, coal seam thickness 1.5～1.7m; Average 1.65m, coal bed texture is complicated, and the middle and upper part accompanies the more stable siltstone dirt band of one deck, between thickness 0.20～0.3m; Belong to more stable coal seam, immediate roof is a marl, thick 0.26～0.54m, average 0.4m; Its compressive strength is 72.91～94.96MPa, average 83.99MPa, tensile strength 4.17～4.70MPa, average 4.44MPa.Immediate bottom is an argillaceous rocks, thick 1.55m, and Dark grey, fine and close, contain carbonaceous and pyrite, compressive strength is 71MPa.
In the roadway arrangement in 11 coal seams, former adopt along roof arranged preparation and stope drift active workings more, high general 2.3 meters of lane, and coal seam past is removed 2.3-1.74-0.08=0.48 rice, and past " backplate surface integrality " is destroyed, and the tunnel has more serious at present pucking.The pucking amount is big and speed is fast, takes measures such as the cleaning end of a year or month or bottoming plate anchor pole, handles.Cleaning end of a year or month workload is big and influence service time, makes earth anchor and often presss from both sides hammer drill and operating difficulties.The pucking problem is never effectively administered.11 layers of coal road road pucking effect main body are " its 2.5m be 12 coal seams of thick 0.10m " down, and reason is that the past siltstone cut out and cut out is the crack that produces, and makes the base plate destroy integrity.Arrange employing the inventive method since beginning eleventh floor coal road road in 2004, protected 2.5 meters thick siltstone integralities of base plate not to be destroyed, improved base plate flour sand rock stratum and got rock mass strength, prevented and treated the serious pucking phenomenon that the tunnel occurs.
In the roadway arrangement process in 15 coal seams; Also adopted roadway arrangement mode of the present invention; Guarantee the pelitic surface integrity that 1.55m is thick, controlled the creep of its following 16 layers of coals, avoided the pucking phenomenon of continuous appearance; Guaranteed the safe handling in tunnel, the tunnel pucking has obtained effective control.
In the roadway arrangement process of 15 layers of coal; Adopt the roadway arrangement mode of " guaranteeing the base plate integrality ", guaranteed the pelitic surface integrity that 1.55m is thick, improved the pelitic rock mass strength of base plate; Control the creep of its following 16 layers of coals, effectively prevented and treated the pucking in tunnel.
Claims (1)
1. a roadway arrangement method of preventing and treating the tunnel pucking is characterized in that, it be with roadway arrangement more than seat earth, be not damaged with the integrality that guarantees backplate surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110366022.6A CN102518447B (en) | 2011-11-17 | 2011-11-17 | Roadway layout method for controlling roadway floor heave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110366022.6A CN102518447B (en) | 2011-11-17 | 2011-11-17 | Roadway layout method for controlling roadway floor heave |
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| CN102518447A true CN102518447A (en) | 2012-06-27 |
| CN102518447B CN102518447B (en) | 2014-07-30 |
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| CN201110366022.6A Expired - Fee Related CN102518447B (en) | 2011-11-17 | 2011-11-17 | Roadway layout method for controlling roadway floor heave |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089304A (en) * | 2012-12-21 | 2013-05-08 | 太原理工大学 | Heaving floor monitoring method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3787796B2 (en) * | 1997-04-04 | 2006-06-21 | 清水建設株式会社 | Construction method of tunnel wellhead on steep slope |
| CN1865660A (en) * | 2006-06-16 | 2006-11-22 | 中国矿业大学 | Construction method for weakening zone of floor plate wall rock |
| CN101349155A (en) * | 2007-07-20 | 2009-01-21 | 河南理工大学 | Apparatus for controlling laneway bottom heave |
| CN102162364A (en) * | 2011-03-21 | 2011-08-24 | 山东新阳能源有限公司 | Layout method for underground dense-medium shallow-slot coal preparation in coal mine |
-
2011
- 2011-11-17 CN CN201110366022.6A patent/CN102518447B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3787796B2 (en) * | 1997-04-04 | 2006-06-21 | 清水建設株式会社 | Construction method of tunnel wellhead on steep slope |
| CN1865660A (en) * | 2006-06-16 | 2006-11-22 | 中国矿业大学 | Construction method for weakening zone of floor plate wall rock |
| CN101349155A (en) * | 2007-07-20 | 2009-01-21 | 河南理工大学 | Apparatus for controlling laneway bottom heave |
| CN102162364A (en) * | 2011-03-21 | 2011-08-24 | 山东新阳能源有限公司 | Layout method for underground dense-medium shallow-slot coal preparation in coal mine |
Non-Patent Citations (1)
| Title |
|---|
| 张建华: "大雁二矿软岩煤层回采巷道失稳原因分析", 《煤炭科学技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089304A (en) * | 2012-12-21 | 2013-05-08 | 太原理工大学 | Heaving floor monitoring method |
| CN103089304B (en) * | 2012-12-21 | 2015-03-25 | 太原理工大学 | Heaving floor monitoring method |
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| CN102518447B (en) | 2014-07-30 |
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Granted publication date: 20140730 Termination date: 20161117 |
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