CN103061770A - Split tunneling and support method for roadways with near interlayer spacing - Google Patents
Split tunneling and support method for roadways with near interlayer spacing Download PDFInfo
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- CN103061770A CN103061770A CN2012105559855A CN201210555985A CN103061770A CN 103061770 A CN103061770 A CN 103061770A CN 2012105559855 A CN2012105559855 A CN 2012105559855A CN 201210555985 A CN201210555985 A CN 201210555985A CN 103061770 A CN103061770 A CN 103061770A
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Abstract
The invention relates to a coal mine underground roadway tunneling and support method, particularly relates to a split tunneling and support method for roadways with near interlayer spacing and solves the problem of potential safety hazards caused by a full-section tunneling and conventional support mode of roadways with low roadway roof thicknesses. The method comprises split tunneling and anchor rod and anchor cable combined support, and stakes are supported on the driver side of a unit simultaneously. According to the coal mine underground roadway tunneling and support method, the roadway roof is controlled effectively, and potential safety hazards caused by large roadway sections and thin interlayer spacing are reduced; inclined anchor cables are arranged, so that anchoring sections of the anchor cables are guaranteed to be supported in coal walls on two sides effectively, and the support effect is increased; and the stakes are supported on the machine set driver side, so that the personnel security is guaranteed.
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 the tunnel adopts conventional supporting method just can effectively control back in the process of driving, guarantees the safety of underground operators.But the lower situation of back thickness can appear under the coal mine, the average thickness of back only has 2 ~ 2.5m, if adopt in this case full advance and conventional support pattern supporting, the pressure that back bears is large, the fried side of roadway's sides is serious, the base plate pucking has brought potential safety hazard for 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 in order to solve the lower tunnel of back thickness, and a kind of nearly interlamellar spacing tunnel gradation driving and supporting method are provided.
The present invention adopts following technical scheme to realize: nearly interlamellar spacing tunnel gradation driving and supporting method may further comprise the steps:
Development machine begins digging laneway from 2/3rds of drift section;
Back while tunneling behind development machine installs pin, the supporting point of pin is above a side of driver place side on the development machine, next adopts steel band and anchor pole that square is arranged on it to add have the anchor cable of anchor cable eye beam and anchor cable to carry out combined supporting on it, steel band is fixed by anchor pole interval level on back along its length, the array pitch of steel band is 800mm, horizontal range between the anchor pole is 900mm, the anchor cable beam is fixed by anchor cable interval level on back along its length, row's spacing of anchor cable beam is 1600mm, and anchor cable enters in the back by anchor cable eye oblique cutting on the anchor cable beam, and anchor cable and back angle are 60 °;
After the drift section that tunnels first connected, development machine was stepped back, and expanded side after supporting is reliable again, expanded enough intrinsic sections;
When expanding side, back while tunneling behind development machine installs pin, the supporting point of pin is above a side of driver place side on the development machine, next adopts steel band and anchor pole that square is arranged on it to add have the anchor cable of anchor cable eye beam and anchor cable to carry out combined supporting on it, the array pitch of steel band is 800mm, horizontal range between the anchor pole is 900mm, the anchor cable beam is fixed by anchor cable interval level on back along its length, row's spacing of anchor cable beam is 1600mm, and anchor cable vertically inserts in the back by anchor cable eye on the anchor cable beam.
The tunnel gradation driving of nearly interlamellar spacing, especially selected to begin driving from 2/3rds of drift section first, so that the pressure on the back reduces in the tunneling process, simultaneously development machine running is also convenient, its high efficiency, even therefore back is thinner, the accident that also can not occur caving in the tunneling process; Back above the driver adopts pin to add strong supporting, moves back at development machine and can protect the driver in the machine process; Add that with steel band and anchor pole anchor cable beam and anchor cable carry out combined supporting to the tunnel, can effectively control back, in addition row's spacing of steel band and anchor cable beam has been made preferably, this row's spacing is repeatedly put into practice by underground work people personnel and is drawn, the operating personnel has made performing creative labour to this, allow simultaneously the anchor cable oblique cutting enter in the back, anchor cable can be anchored on the coal wall of reserving in goaf, upper strata, tunnel, increased the contact area of anchor cable, particularly anchor cable is to insert as 60 ° angle with the folded acute angle of vertical curve, take full advantage of the coal wall that the goaf is reserved, more strengthened supporting effect, utilize this supporting method can guarantee the problem that roadway's sides explodes side and base plate pucking not occur after the supporting, 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 the same level line in twos, and the adjacent square of two steel bands in the same horizontal line overlaps.The inferior steel band that is used for supporting in front and back has been linked to be an integral body, has better guaranteed 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, the specification of anchor cable is Ф 17.8 * 3000mm.Anchor pole and anchor cable are also drawn by underground operators practice repeatedly, and specification has been made optimization, have increased the effect of supporting.
Driving provided by the invention and supporting method can effectively be controlled back, have solved because the thin potential safety hazard of bringing of interlamellar spacing.Gradation driving in nearly interlamellar spacing tunnel has reduced the generation that the roof pressure that causes because the drift section large interlamellar spacing is thin increases the security incident that causes; Set oblique anchor cable, guarantee that the effective supporting of anchorage cable anchoring section in the coal wall of both sides, has increased the effect of supporting; Install pin in the unit driver's side, guarantee personal security.
Description of drawings
Fig. 1 is supporting effect figure of the present invention.
Among the figure: 1-anchor pole, 2-steel band, 3-anchor cable, 4-anchor cable beam, 5-pin, 6-drift section.
The specific embodiment
Nearly interlamellar spacing tunnel gradation driving and supporting method may further comprise the steps:
Development machine begins digging laneway from 2/3rds of drift section 6;
Back while tunneling behind development machine installs pin 5, the supporting point of pin 5 is above a side of driver place side on the development machine, next adopts steel band 2 and anchor pole 1 that square is arranged on it to add have the anchor cable of anchor cable eye beam 4 and anchor cable 3 to carry out combined supporting on it, steel band 2 is fixed by anchor pole 1 interval level on back along its length, row's spacing of steel band 2 is 800mm, horizontal range between the anchor pole 1 is 900mm, anchor cable beam 4 is fixed by anchor cable 3 interval levels on back along its length, row's spacing of anchor cable beam 4 is 1600mm, and anchor cable 3 enters in the back by anchor cable eye oblique cutting on the anchor cable beam 4, and the folded acute angle of anchor cable 3 and vertical curve is 60 °;
After the drift section that tunnels first connected, development machine was stepped back, and expanded side after supporting is reliable again, expanded enough intrinsic sections;
When expanding side, back while tunneling behind development machine installs pin 5, the supporting point of pin 5 is above a side of driver place side on the development machine, next adopts steel band 2 and anchor pole 1 that square is arranged on it to add have the anchor cable of anchor cable eye beam 4 and anchor cable 3 to carry out combined supporting on it, steel band 2 is fixed by anchor pole 1 interval level on back along its length, row's spacing of steel band 2 is 800mm, horizontal range between the anchor pole 1 is 900mm, anchor cable beam 4 is fixed by anchor cable 3 interval levels on back along its length, row's spacing of anchor cable beam 4 is 1600mm, and anchor cable 3 vertically inserts in the back by anchor cable eye on the 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 the same level line in twos, and two steel bands, 2 adjacent squares in the same horizontal line overlap.Above-mentioned nearly interlamellar spacing tunnel gradation driving and supporting method, the specification of described anchor pole 1 is Ф 18 * 1700mm, the specification of anchor cable 3 is Ф 17.8 * 3000mm.During implementation, the specification of anchor pole is Ф 18 * 1700mm, and the specification of anchor cable is Ф 17.8 * 3000mm, during supporting, one human long handle instrument withstands steel band or anchor cable beam, one people stands on the special-purpose metal stool and operates, and anchor pole or anchor cable are inserted in the back, installs nut at the end of anchor pole or anchor cable, finished supporting, in order to guarantee supporting quality, the size of anchor pole top nut pretightning force is more than 140N.m simultaneously, and the nut pretightning force size on the anchor cable is more than 30Mpa.
Claims (3)
1. nearly interlamellar spacing tunnel gradation driving and supporting method is characterized in that may further comprise the steps:
Development machine begins digging laneway from 2/3rds of drift section (6);
Back while tunneling behind development machine installs pin (5), the supporting point of pin (5) is above a side of driver place side on the development machine, next adopts steel band (2) and anchor pole (1) that square is arranged on it to add have the anchor cable of anchor cable eye beam (4) and anchor cable (3) to carry out combined supporting on it, steel band (2) is fixed by anchor pole (1) interval level on back along its length, row's spacing of steel band (2) is 800mm, horizontal range between the anchor pole (1) is 900mm, anchor cable beam (4) is fixed by anchor cable (3) interval level on back along its length, row's spacing of anchor cable beam (4) is 1600mm, and anchor cable (3) enters in the back by the upper anchor cable eye oblique cutting of anchor cable beam (4), and the folded acute angle of anchor cable (3) and vertical curve is 60 °
After the drift section that tunnels first connected, development machine was stepped back, and expanded side after supporting is reliable again, expanded enough intrinsic sections;
When expanding side, back while tunneling behind development machine installs pin (5), the supporting point of pin (5) is above a side of driver place side on the development machine, next adopts steel band (2) and anchor pole (1) that square is arranged on it to add have the anchor cable of anchor cable eye beam (4) and anchor cable (3) to carry out combined supporting on it, steel band (2) is fixed by anchor pole (1) interval level on back along its length, row's spacing of steel band (2) is 800mm, horizontal range between the anchor pole (1) is 900mm, anchor cable beam (4) is fixed by anchor cable (3) interval level on back along its length, row's spacing of anchor cable beam (4) is 1600mm, and anchor cable (3) vertically inserts in the 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 the same level line in twos, 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, the specification that it is characterized in that described anchor pole (1) is Ф 18 * 1700mm, the specification of anchor cable (3) is Ф 17.8 * 3000mm.
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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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| CN103061770B CN103061770B (en) | 2015-10-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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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- 2012-12-20 CN CN201210555985.5A patent/CN103061770B/en active Active
Patent Citations (3)
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| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103061770B (en) | 2015-10-21 |
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