CN204175317U - Export supporting under large-inclination-angle coal bed working face to arrange - Google Patents
Export supporting under large-inclination-angle coal bed working face to arrange Download PDFInfo
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- CN204175317U CN204175317U CN201420612156.0U CN201420612156U CN204175317U CN 204175317 U CN204175317 U CN 204175317U CN 201420612156 U CN201420612156 U CN 201420612156U CN 204175317 U CN204175317 U CN 204175317U
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Abstract
The utility model is export supporting under large-inclination-angle coal bed working face to arrange, and offers breach in the coal seam that the utility model exports under coal-face.Basic point post is laid in breach rib side, and opposite side lays gear coal close standing props; Lay basic point post in the middle part of breach breach is divided into slips coal side and walkway side.Tunnel arranges strengthening supporting in side.In goaf, crib protection is set apart from 1m place, tunnel.On the tunnel for the treatment of mining area, side arranges advance support.The utility model exports not stay in coal-face exploitation at present establishes protection pillar, and after a work plane completes, its tunnel can continue as next work plane and use.Lower outlet protection pillar coal recovery rate reaches 100%.Export advanced pedestrian's eye of no longer constructing under coal-face, reduce ommatidium gas to the threat of safety, cancel booster and ventilate, power cost saving, emergency exit management difficulty under reduction blast mining face.
Description
Technical field
The utility model relates to a kind of coal production technique, especially a kind of export under the large-inclination-angle coal bed coal-face carried out without coal pillar mining process supporting lay mode.
Background technology
Along with the raising of mine capacity, the increase of mining rate, the tensity of resource more and more displays.By can existing coal resources of taping the latent power be realized without coal pillar mining, improve the resource recovery of mine, extend the length of service of mine.
The feature of non chain pillar entryprotection and applicability: do not stay protection pillar in one or both sides, tunnel and the tunnel that relies on supporting to safeguard claims without coal column tunnel. be conducive to safety in production, improve benefit and resource recovery, non chain pillar entryprotection method arranges that tunnel now adopts that gob side entry retaining gob side entry driving two kinds of methods are used in combination carries out.Without coal pillar mining technology, i.e. a preset packwall on the downside of a upper section transportation roadway, during the driving of next section material lane, along packwall driving, no longer prearranged pillar, cements out reserved coal pillar between upper and lower two work planes with packwall.
The principle of non chain pillar entryprotection: non chain pillar entryprotection is generally use at coal-face, in order to improve resource recovery, just coal column is not stayed when coal-face is exploited, that is after a work plane has been adopted, its tunnel can continue as next work plane and continue to use, the return airway such as going up a work plane can as the air intake lane of next work plane, like this just need not reserved coal pillar between two work planes again.
Deep inclined thin coal seam be mining height below 0.8 meter, inclination angle is in the coal seam of 25 ° ~ 45 °, and it is large that exploitation difficulty is adopted in this coal seam, and yield poorly, ature of coal is excellent.Along with the development of comprehensive mechanical coal mining technology, the increase of mining rate, the tensity of resource more and more displays, and imbalance also appears in the relation of taking over of digging, in order to alleviate succession relation and improve resource recovery, be necessary that proposing large-inclination-angle coal bed Fei Yankonghu lane big gun adopts technical research.
Utility model content
In order to overcome the above problems, the utility model exports supporting and arranges under providing large-inclination-angle coal bed working face, be specially:
The breach 6 of width 1.8 ~ 2.2m is offered in the coal seam exported under coal-face; The trend of breach tilts to goaf, with tunnel 10 in 40 ° ~ 50 ° angles; Basic point post 1 is laid in breach rib side, and breach opposite side lays gear coal close standing props 5; Move towards laying basic point post along breach in the middle part of breach breach is divided into slips coal side and walkway side, be walkway by rib side, arrange strengthening supporting 3 in tunnel within the scope of distance rib 25m, strengthening supporting is arranged on tunnel and helps, and adopts hydraulic prop to carry out supporting and forms strengthening supporting;
Arrange grillage 4 in goaf within the scope of distance rib 25m and carry out supporting, grillage is arranged on apart from the goaf at 1m place, tunnel; On the tunnel for the treatment of mining area, side arranges advance support 7.
Export under large-inclination-angle coal bed working face as above supporting arrange, illustrate further into, described basic point post 1 be hydraulic prop, and be distributed within the scope of the 2.5m of rib rear, basic point post array pitch is 1.0m, post distance be 0.8m.
Export supporting under large-inclination-angle coal bed working face as above to arrange, illustrate further as its post of, the basic point post in breach 6 is apart from 0.8m; Its post distance of strengthening supporting 3 in tunnel is 0.8m; Treat that the advance support 7 arranged in the tunnel of mining area is hydraulic prop, its post distance is 0.8m.
Export supporting under large-inclination-angle coal bed working face as above to arrange, illustrate further as, the wide 1.0m of the walkway in breach 6, slip the wide 0.9m in coal side, the upper side of breach arranges row's bavin and carries out back of the body reality.
Export supporting under large-inclination-angle coal bed working face as above to arrange, illustrate further into, described grillage (4) adopts diameter to be not less than 14cm, and length is not less than the round log erection of 0.8m, and grillage spacing is 0.50m; Described grillage is arranged on apart within the scope of rib 20m.
the following effect of the utility model tool:
At present export not stay in coal-face exploitation and establish protection pillar, after a work plane coal-face completes, its tunnel can continue as next work plane and use, and tunnels a tunnel less, saves cost of winning.
After this project implementation, lower outlet protection pillar coal recovery rate reaches 100%, decreases coal resources and loses, extend work plane service time, alleviates the nervous contradiction of excavation replacement.
The roof timbering requirement of strength that the supporting of this technology exports under being enough to solve coal-face.
Lower outlet, by adopting crib protection technology and in addition strengthening supporting, exports the problem at the base plate sliding end, ensure that tunnel integrality under efficiently solving coal-face stoping period.The mining influence that the rib that advance support solves coal-face front is subject to.
Export advanced pedestrian's eye of no longer constructing under coal-face, reduce ommatidium gas to the threat of safety, cancel booster and ventilate, power cost saving, emergency exit management difficulty under reduction blast mining face.
Accompanying drawing explanation
Fig. 1: coal-face laying structure schematic diagram of the present utility model.
Fig. 2: goaf top plate caving zone distribution map in high inclination-angle situation.
Fig. 3: sectional view arranged by section dense pillar and basic point post.
Detailed description of the invention
The strike length 510m of embodiment coal-face 9, the average 108m of tilt length, inclined-plane amasss 55080m2.Coal seam thickness, Stability Analysis of Structures within the scope of work plane, pure coal thickness is generally 0.63m, belongs to comparatively regularcoal seam, determines that mining height is 1.13m.Coal seam is pushed up as grey medium bed shape argillaceous siltstoue always, thick 9.80m; The direct end is lamelliform grey black mud stone folder seam, thick 3.00m; Past is medium bed shape mud stone, and bottom is silty, thick 3.00m; Pure coal average thickness 1.25m, Polodyakonov coefficient 3.0, coal bed texture is complicated, and dirt band layer is many.
Concrete production technique is:
1, Mined-out Area control mode:
The processing method in goaf 2 adopts whole caving method, make that immediate roof rock stratum, goaf is planned to be caving, to keep the minimum area of suspension roof of coal-face, make fractured rock volume expansion after roof caving and bashing, thus alleviate face pressure and weaken the impact of overlying rock on work plane space.
2, coal-face supporting parameter
Calculate and original successful coal-mining method according to design support density, in conjunction with actual, determine that coal-face parameter is: pseudo-inclination angle is 35
0(getting), bedding angle 64
0, effectively adopting long is 115m, and coal-face arranges 48 sections of section dense pillars 8 altogether.Coal-face supporting parameter is: the array pitch of basic point post 1 is 1.0m, and post is apart from be 0.8m, and the length of section dense pillar 8 gets 3.0m, vertical interval 2.1m, adjacent two sections of section dense pillars puppet oblique distance 2.4m, move towards intensive with move towards angle for getting 5
0~ 11
0, move to direction, goaf in order to spoil.For adapting to the change in allowed band of coal seam true dip angle and section dense pillar 8 vertical interval, the change of section dense pillar 8 length should meet a upper section dense pillar afterbody and next section dense strut ends square crossing length is 1.05m.
3, Roof Control method
Coal-face 9 adopts hydraulic prop to wear wooden cap point post to carry out supporting, and single section dense pillar stops the control top method of goaf spoil.The maximum distance of face roof under control 5.5m of coal-face, minimum distance of face roof under control 4.5m, caving step pitch 1.0m, the wide 0.5m in big gun road.
4, under coal-face, outlet is laid
Under coal-face, export the breach of the wide 2m that constructs in advance, described breach trend tilts to goaf, is 40 ° ~ 50 ° angles with coal cutting roadway; Basic point post is laid in breach rib side, and breach opposite side lays gear coal close standing props; Move towards to lay basic point post along breach in the middle part of breach to be divided into by breach and to slip coal side and walkway side, is walkway by rib side, wide 1.0m, slips the wide 0.9m in coal side, and the upper side of breach is arranged to be arranged bavin and carry out back of the body reality.
In emergency exit 20m under coal-face, adopt a single hydraulic prop post of attaching the names of pre-determined candidates to carry out strengthening supporting, post distance is 0.8m.
Under coal-face, outlet is not less than 0.8m round log crib building carries out supporting apart from 1m place, tunnel employing length.
The present embodiment is adopted to carry out the interpretation of result of exploiting:
When after coal-face exploitation, branch, the amount of crushing of its face load, press that to manifest degree, water component etc. all not identical along stope incline direction, its pressure distribution is roughly divided into top, middle part, 3 stages of bottom along coal-face, coal work Middle face leg resistance is greater than top, and lower posts resistance is minimum.
Machine lane roof and floor and two helps the working resistance of the speed that shifts near and advanced hydraulic prop to present cyclically-varying, machine lane roof and floor shifts near speed and is obviously greater than two and helps to shift near speed, maximum roof and floor shifts near speed and two and helps the speed that shifts near all to start obviously to become large at distance coal-face about 4m, 8m, to peaking, starts after 14m obviously to diminish.Therefore substantially can determine that the scope of advanced support pressure peak value is within the scope of distance rib 8 ~ 14m.And tunnel areal deformation speed is larger is made up of two regions, part within 28 ~ 38m part and distance rib 8m, within 8m, part change is because by the impact of roof break, and mainly because the impact of coal-face advanced support pressure in 28 ~ 38m.
Because big angle coal face erecting dense individual props spoil forms the state of " defincienct in the upper and excessive in the lower ", thus to being greater than top below the supporting role of top board, periodic caving is made to have obvious segmentation feature along coal-face incline direction, coal-face top old power station step pitch is less than bottom, and coal-face lower posts bearing pressure is less than top.
According to test stope mine pressing Strata Behavior, coal-face lower support pressure compared with coal work Middle face top without significant change.But for avoiding the stress occurred because of corner to concentrate and the coal work surface pressure that causes is large, cause wall caving serious, and pillar kills, the construction of advanced breach must with pick with.In the breach done, upper side must be real with row's bavin back of the body, in case coal wall caving is hurted sb.'s feelings
According to coal-face overlying rock caving zone distribution situation and goaf stress distribution situation, due to bottom, to be caving the less filling in space comparatively closely knit, larger to roof timbering effect, goaf is exported under adopting crib building mode supporting coal-face, bottom slab stress area can be increased, prevent from boring the roadway deformation etc. caused at the end sliding end.
The successful Application of this technology, not only huge economic benefit is brought to colliery itself, technical example is also provided to society simultaneously, comprising: (1) big gun exports advanced pedestrian's eye of no longer constructing under adopting coal-face, cancel booster to ventilate, power cost saving 8712 yuan; (2) export protection pillar coal recovery rate under coal-face and reach 100%, decrease coal resources and lose; (3) extend coal-face service time, alleviate the nervous contradiction of excavation replacement, be also ore deposit creation economic benefit more than 135 ten thousand yuan simultaneously.(4) after this project implementation, under coal-face, export advanced pedestrian's eye of no longer constructing, reduce 2 constructors, 1 full-time fireboss, reduce labour cost more than 140,000 yuan, enriched the labour of coal-face simultaneously.
Claims (5)
1. export supporting under large-inclination-angle coal bed working face to arrange, it is characterized in that, in the coal seam exported under coal-face, offer the breach (6) of width 1.8 ~ 2.2m; The trend of breach tilts to goaf, with tunnel (10) in 40 ° ~ 50 ° angles; Basic point post (1) is laid in breach rib side, and breach opposite side lays gear coal close standing props (5); Move towards laying basic point post along breach in the middle part of breach breach is divided into slips coal side and walkway side, be walkway by rib side, arrange strengthening supporting (3) in tunnel within the scope of distance rib 25m, strengthening supporting is arranged on tunnel and helps, and adopts hydraulic prop to carry out supporting and forms strengthening supporting;
Arrange grillage (4) in goaf within the scope of distance rib 25m and carry out supporting, grillage is arranged on apart from the goaf at 1m place, tunnel;
On the tunnel for the treatment of mining area, side arranges advance support (7).
2. export supporting under large-inclination-angle coal bed working face as claimed in claim 1 to arrange, it is characterized in that, described basic point post (1) is hydraulic prop, and be distributed within the scope of the 2.5m of rib rear, basic point post array pitch is 1.0m, and post distance is 0.8m.
3. export supporting under large-inclination-angle coal bed working face as claimed in claim 1 to arrange, it is characterized in that, its post of the basic point post in breach (6) is apart from 0.8m; Its post distance of strengthening supporting (3) in tunnel is 0.8m; Treat that the advance support (7) arranged in the tunnel of mining area is hydraulic prop, its post distance is 0.8m.
4. export supporting under large-inclination-angle coal bed working face as claimed in claim 1 to arrange, it is characterized in that, the wide 1.0m of walkway in breach (6), slip the wide 0.9m in coal side, the upper side of breach arranges row's bavin and carries out back of the body reality.
5. export supporting under large-inclination-angle coal bed working face as claimed in claim 1 to arrange, it is characterized in that, described grillage (4) adopts diameter to be not less than 14cm, and length is not less than the round log erection of 0.8m, and grillage spacing is 0.50m; Described grillage is arranged on apart within the scope of rib 20m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420612156.0U CN204175317U (en) | 2014-10-22 | 2014-10-22 | Export supporting under large-inclination-angle coal bed working face to arrange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420612156.0U CN204175317U (en) | 2014-10-22 | 2014-10-22 | Export supporting under large-inclination-angle coal bed working face to arrange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175317U true CN204175317U (en) | 2015-02-25 |
Family
ID=52564134
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420612156.0U Expired - Fee Related CN204175317U (en) | 2014-10-22 | 2014-10-22 | Export supporting under large-inclination-angle coal bed working face to arrange |
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| CN (1) | CN204175317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088989A (en) * | 2019-12-12 | 2020-05-01 | 大同煤矿集团有限责任公司 | Gob-side entry driving surrounding rock control method for fully mechanized caving section of extra-thick coal seam |
-
2014
- 2014-10-22 CN CN201420612156.0U patent/CN204175317U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088989A (en) * | 2019-12-12 | 2020-05-01 | 大同煤矿集团有限责任公司 | Gob-side entry driving surrounding rock control method for fully mechanized caving section of extra-thick coal seam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20151022 |
|
| EXPY | Termination of patent right or utility model |