CN103061770B - Nearly interlamellar spacing tunnel gradation driving and supporting method - Google Patents
Nearly interlamellar spacing tunnel gradation driving and supporting method Download PDFInfo
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- CN103061770B CN103061770B CN201210555985.5A CN201210555985A CN103061770B CN 103061770 B CN103061770 B CN 103061770B CN 201210555985 A CN201210555985 A CN 201210555985A CN 103061770 B CN103061770 B CN 103061770B
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Abstract
The present invention relates to coal mine down-hole tunnel driving, supporting method, be specially a kind of nearly interlamellar spacing tunnel gradation driving and supporting method, solve the lower tunnel of back thickness and adopt full advance and conventional support pattern to bring the problem of potential safety hazard.Nearly interlamellar spacing tunnel gradation driving and supporting method, comprise gradation driving and adopt anchor pole and Application of Combined Support with Anchor, install pin in unit driver's side, driving provided by the invention and supporting method effectively can control back, solve due to thin the brought potential safety hazard of interlamellar spacing simultaneously.Nearly interlamellar spacing tunnel gradation driving, reduces the generation of the security incident caused because of thin the caused roof pressure increase of drift section large interlamellar spacing; Set oblique anchor cable, ensure that the effective supporting of anchorage cable anchoring section is in the coal wall of both sides, adds the effect of supporting; Prop up in unit driver's side the post that sets up an office, guarantee personal security.
Description
Technical field
The present invention relates to coal mine down-hole tunnel driving, supporting method, be specially a kind of nearly interlamellar spacing tunnel gradation driving and supporting method.
Background technology
The interlamellar spacing in coal mine down-hole tunnel and the goaf on it is on average at tens meters, and namely the thickness of the top board in tunnel is tens meters, and tunnel adopts conventional supporting method just effectively can control back in the process of driving, ensures the safety of underground operators.But underground coal mine there will be the lower situation of back thickness, the average thickness of back only has 2 ~ 2.5m, if adopt full advance and conventional support pattern supporting in this case, the pressure that back bears is large, the fried side of roadway's sides is serious, base plate pucking, brings potential safety hazard to the safety in production of down-hole.
Summary of the invention
The present invention adopts full advance and conventional support pattern to bring the problem of potential safety hazard to solve the lower tunnel of back thickness, provides a kind of nearly interlamellar spacing tunnel gradation driving and supporting method.
The present invention adopts following technical scheme to realize: nearly interlamellar spacing tunnel gradation driving and supporting method, comprise the following steps:
Development machine is digging laneway from 2/3rds places of drift section;
The back of driving limit, limit after development machine installs pin, above the side of supporting point side, driver place on development machine of pin, secondly adopting it has the steel band of square and anchor pole to add it has the anchor cable beam of anchor cable eye and anchor cable carry out combined supporting, steel band is fixed by anchor pole spaced horizontal along its length on back, the array pitch of steel band is 800mm, horizontal range between anchor pole is 900mm, anchor cable beam is fixed by anchor cable spaced horizontal along its length on back, the trestle column of anchor cable beam is 1600mm, and anchor cable enters in back by anchor cable eye oblique cutting on anchor cable beam, anchor cable and back angle are 60 °,
After the drift section first tunneled is through, development machine is stepped back, and treats that supporting can expand side rearward again, expands enough intrinsic sections;
When expanding side, the back of driving limit, limit after development machine installs pin, above the side of supporting point side, driver place on development machine of pin, secondly adopting it has the steel band of square and anchor pole to add it has the anchor cable beam of anchor cable eye and anchor cable carry out combined supporting, the array pitch of steel band is 800mm, horizontal range between anchor pole is 900mm, anchor cable beam is fixed by anchor cable spaced horizontal along its length on back, the trestle column of anchor cable beam is 1600mm, and anchor cable is vertically inserted in back by anchor cable eye on anchor cable beam.
The tunnel gradation driving of nearly interlamellar spacing, especially have selected and first tunnel from 2/3rds places of drift section, pressure in tunneling process on back is reduced, development machine running simultaneously also facilitates, its operating efficiency is high, even if therefore back is thinner, in tunneling process, also there will not be the accident of landslide, back above driver adopts pin strengthening supporting, move back in machine process at development machine and can protect driver, add that anchor cable beam and anchor cable carry out combined supporting to tunnel with steel band and anchor pole, effectively can control back, in addition make preferably to the trestle column of steel band and anchor cable beam, this trestle column is repeatedly put into practice by underground work people personnel and is drawn, operating personnel has made performing creative labour to this, allow anchor cable oblique cutting enter in back simultaneously, anchor cable can be anchored on the reserved coal wall in goaf, upper strata, tunnel, add the contact area of anchor cable, particularly anchor cable with vertical curve folded by acute angle be 60 ° angle insert, take full advantage of the coal wall that goaf is reserved, more strengthen supporting effect, do not occur after utilizing this supporting method can ensure supporting that roadway's sides explodes the problem of side and base plate pucking, for safety in production provides guarantee.
Above-mentioned nearly interlamellar spacing tunnel gradation driving and supporting method, the steel band of first supporting and the steel band of rear supporting are on same level line between two, and the adjacent square of two steel bands in the same horizontal line overlaps.The secondary steel band for supporting in front and back has been linked to be an entirety, better ensure that the effect of supporting.
Above-mentioned nearly interlamellar spacing tunnel gradation driving and supporting method, the specification of described anchor pole is Ф 18 × 1700mm, and the specification of anchor cable is Ф 17.8 × 3000mm.Anchor pole and anchor cable are also drawn by underground operators practice repeatedly, have made optimization to specification, add the effect of supporting.
Driving provided by the invention and supporting method effectively can control back, solve due to thin the brought potential safety hazard of interlamellar spacing.Nearly interlamellar spacing tunnel gradation driving, reduces the generation of the security incident caused because of thin the caused roof pressure increase of drift section large interlamellar spacing; Set oblique anchor cable, ensure that the effective supporting of anchorage cable anchoring section is in the coal wall of both sides, adds the effect of supporting; Install pin in unit driver's side, guarantee personal security.
Accompanying drawing explanation
Fig. 1 is supporting effect figure of the present invention.
In figure: 1-anchor pole, 2-steel band, 3-anchor cable, 4-anchor cable beam, 5-pin, 6-drift section.
Detailed description of the invention
Nearly interlamellar spacing tunnel gradation driving and supporting method, comprise the following steps:
Development machine is digging laneway from 2/3rds places of drift section 6;
The back of driving limit, limit after development machine installs pin 5, above the side of supporting point side, driver place on development machine of pin 5, secondly adopting it has the steel band 2 of square and anchor pole 1 to add it has the anchor cable beam 4 of anchor cable eye and anchor cable 3 carry out combined supporting, steel band 2 is fixed by anchor pole 1 spaced horizontal along its length on back, the trestle column of steel band 2 is 800mm, horizontal range between anchor pole 1 is 900mm, anchor cable beam 4 is fixed by anchor cable 3 spaced horizontal along its length on back, the trestle column of anchor cable beam 4 is 1600mm, and anchor cable 3 enters in back by anchor cable eye oblique cutting on anchor cable beam 4, the folded acute angle of anchor cable 3 and vertical curve is 60 °,
After the drift section first tunneled is through, development machine is stepped back, and treats that supporting can expand side rearward again, expands enough intrinsic sections;
When expanding side, the back of driving limit, limit after development machine installs pin 5, above the side of supporting point side, driver place on development machine of pin 5, secondly adopting it has the steel band 2 of square and anchor pole 1 to add it has the anchor cable beam 4 of anchor cable eye and anchor cable 3 carry out combined supporting, steel band 2 is fixed by anchor pole 1 spaced horizontal along its length on back, the trestle column of steel band 2 is 800mm, horizontal range between anchor pole 1 is 900mm, anchor cable beam 4 is fixed by anchor cable 3 spaced horizontal along its length on back, the trestle column of anchor cable beam 4 is 1600mm, anchor cable 3 is vertically inserted in back by anchor cable eye on anchor cable beam 4.
Above-mentioned nearly interlamellar spacing tunnel gradation driving and supporting method, the steel band 2 of first supporting and the steel band 2 of rear supporting are on same level line between two, and the adjacent square of two steel bands 2 in the same horizontal line overlaps.Above-mentioned nearly interlamellar spacing tunnel gradation driving and supporting method, the specification of described anchor pole 1 is Ф 18 × 1700mm, and the specification of anchor cable 3 is Ф 17.8 × 3000mm.During concrete enforcement, the specification of anchor pole is Ф 18 × 1700mm, and the specification of anchor cable is Ф 17.8 × 3000mm, during supporting, one people withstands steel band or anchor cable beam with long handle instrument, one people stands on special metal stool and operates, and anchor pole or anchor cable is inserted in back, installs nut at the end of anchor pole or anchor cable, complete supporting, simultaneously in order to ensure supporting quality, the size of anchor pole top nut pretightning force is at more than 140N.m, and the nut pretightning force size on anchor cable is at more than 30Mpa.
Claims (3)
1. nearly interlamellar spacing tunnel gradation driving and supporting method, is characterized in that comprising the following steps:
Development machine is digging laneway from 2/3rds places of drift section (6);
The back of driving limit, limit after development machine installs pin (5), above the side of supporting point side, driver place on development machine of pin (5), secondly adopting it has the steel band of square (2) and anchor pole (1) to add it has the anchor cable beam (4) of anchor cable eye and anchor cable (3) carry out combined supporting, steel band (2) is fixed by anchor pole (1) spaced horizontal along its length on back, the trestle column of steel band (2) is 800mm, horizontal range between anchor pole (1) is 900mm, anchor cable beam (4) is fixed by anchor cable (3) spaced horizontal along its length on back, the trestle column of anchor cable beam (4) is 1600mm, and anchor cable (3) enters in back by the upper anchor cable eye oblique cutting of anchor cable beam (4), the folded acute angle of anchor cable (3) and vertical curve is 60 °
After the drift section first tunneled is through, development machine is stepped back, and treats that supporting can expand side rearward again, expands enough intrinsic sections;
When expanding side, the back of driving limit, limit after development machine installs pin (5), above the side of supporting point side, driver place on development machine of pin (5), secondly adopting it has the steel band of square (2) and anchor pole (1) to add it has the anchor cable beam (4) of anchor cable eye and anchor cable (3) carry out combined supporting, steel band (2) is fixed by anchor pole (1) spaced horizontal along its length on back, the trestle column of steel band (2) is 800mm, horizontal range between anchor pole (1) is 900mm, anchor cable beam (4) is fixed by anchor cable (3) spaced horizontal along its length on back, the trestle column of anchor cable beam (4) is 1600mm, anchor cable (3) is vertically inserted in back by the upper anchor cable eye of anchor cable beam (4).
2. nearly interlamellar spacing tunnel gradation driving according to claim 1 and supporting method, it is characterized in that the steel band (2) of first supporting and the steel band (2) of rear supporting are on same level line between two, and the adjacent square of two steel bands in the same horizontal line overlaps.
3. nearly interlamellar spacing tunnel gradation driving according to claim 1 and 2 and supporting method, is characterized in that the specification of described anchor pole (1) is Ф 18 × 1700mm, and the specification of anchor cable (3) is Ф 17.8 × 3000mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210555985.5A CN103061770B (en) | 2012-12-20 | 2012-12-20 | Nearly interlamellar spacing tunnel gradation driving and supporting method |
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| CN201210555985.5A CN103061770B (en) | 2012-12-20 | 2012-12-20 | Nearly interlamellar spacing tunnel gradation driving and supporting method |
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| CN103061770A CN103061770A (en) | 2013-04-24 |
| CN103061770B true CN103061770B (en) | 2015-10-21 |
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| CN106555596A (en) * | 2015-09-24 | 2017-04-05 | 新汶矿业集团有限责任公司翟镇煤矿 | Little rock pillar crossings on different level rapid constructing method |
| CN114704313A (en) * | 2022-04-12 | 2022-07-05 | 山东安科矿山支护技术有限公司 | Broken roof roadway advanced support method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2274319A (en) * | 1993-01-13 | 1994-07-20 | Jennmar Corp | Reinforcing rod for supporting rock formations |
| CN102337925A (en) * | 2011-08-31 | 2012-02-01 | 山东科技大学 | Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving |
| CN102425438A (en) * | 2011-11-21 | 2012-04-25 | 大同煤矿集团有限责任公司 | Supporting method of laneway under multiple goafs in ultra-close coal seam group |
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2012
- 2012-12-20 CN CN201210555985.5A patent/CN103061770B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2274319A (en) * | 1993-01-13 | 1994-07-20 | Jennmar Corp | Reinforcing rod for supporting rock formations |
| CN102337925A (en) * | 2011-08-31 | 2012-02-01 | 山东科技大学 | Method for enlarging, filling and supporting coal-pillar-free mining roadway for fully-mechanized top coal caving |
| CN102425438A (en) * | 2011-11-21 | 2012-04-25 | 大同煤矿集团有限责任公司 | Supporting method of laneway under multiple goafs in ultra-close coal seam group |
Non-Patent Citations (1)
| Title |
|---|
| 浅埋深薄基岩下大断面切眼掘进与支护技术;陈焕友;《科技信息》;20100905(第25期);第773页 * |
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