CN102322261A - Small coal pillar pressure-equalizing abandoned roadway passing method for large-mining height full-mechanized working faces - Google Patents
Small coal pillar pressure-equalizing abandoned roadway passing method for large-mining height full-mechanized working faces Download PDFInfo
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Abstract
The invention discloses a small coal pillar pressure-equalizing abandoned roadway passing method for large-mining height full-mechanized working faces, which comprises the following steps: reducing the mining height of a working face: the mining height of the full-mechanized working face needs to be gently reduced to the height of an abandoned roadway before mining is stopped for pressure equalization; reserving small pressure-equalizing coal pillars: when the full-mechanized working face is advanced until a certain distance away from the abandoned roadway, mining is stopped, and coal pillars are reserved as the small pressure-equalizing coal pillars between the full-mechanized working face and the abandoned roadway; equalizing the pressure of the working face: mining is stopped at the small pressure-equalizing coal pillars to equalize the pressure of the full-mechanized working face; and continuing to advance the full-mechanized working face after pressure equalization is finished: after a coal cutter cuts through the small pressure-equalizing coal pillars, working face supports are quickly pushed to enter the abandoned roadway to safely control the roof. The method is easy and convenient to operate, the labor intensity is low, the abandoned roadway-supporting cost is low, the time consumed in passing the abandoned roadway is short, and the method is an effective abandoned roadway-passing technique, and has a great application prospect.
Description
Technical field
The present invention relates to a kind of fully-mechanized mining working that guarantees and fast and safely cross the Roof Control method in empty lane, coal seam, specifically a kind of the CONTROL OF STRATA MOVEMENT method that top board is cut catastrophe campaigns such as emitting takes place when preventing the empty lane of Coal Face Passing Through.
Background technology
Because the restriction of mining condition, fully-mechanized mining working often will pass through larger-size empty lane.Receive mining influence, the globality of empty lane top board can reduce, the roof cracking inbreak; Though perhaps the top board integrality is better, deflection is bigger, and they all can have a strong impact on the quick propelling of work plane; Even cause work plane to stop production, and safety in production is brought serious threat.Empty lane is particularly serious to the influence of big mining and high comprehensive mining work plane.The traditional empty lane of mistake method has following several kinds both at home and abroad: 1. strengthen the supporting to empty lane top board with close standing props or grillage, or reinforce empty lane top board and two with anchor pole, anchor cable and help, the normal propelling of work plane directly gets into empty lane; 2. jump to adopt and walk around the sky lane, the heavy open-off cut face of assigning a work; 3. the empty lane of first filling, coal-winning machine cutting obturation is crossed the sky lane.Close standing props or grillage supporting capacity are low; Empty lane possibly produce roof fall and two and help large-scale wall caving under the effect of leading bearing pressure, or top board ruptures above the empty lane, and work plane and the empty lane amount of crushing are increased considerably; Working resistance of support sharply raises; Accidents such as support occur killing or damaging by pressure, cause heavy economic losses, and threaten safety in production.A kind of method in back be mainly used in that big gun is adopted or general adopt etc. removal cost few, influence short work plane of duration, in addition, because both sides are stayed and established the protection coal column before and after empty lane, removal of home face also can cause the wasting of resources.Empty lane placement method filling process is complicated, the time-consuming material that takes, and it is slower to cross empty lane speed.Therefore, the above-mentioned three kinds of empty lane of traditional mistake methods can not guarantee that all fully-mechanized mining working is fast and safely through empty lane because technical economic benefit difference or safety can not get guarantee.
Summary of the invention
Task of the present invention is to solve the existing technological deficiency of the empty lane method of big mining and high comprehensive mining Coal Face Passing Through in the prior art, provides a kind of big mining and high comprehensive mining work plane fender the isobaric empty lane method of crossing; This method is a kind ofly to press the roof Control Technology manifest based on effectively subduing work plane and ore deposit, empty lane, have simple to operation, labour intensity is low, the low characteristics such as empty lane weak point consuming time that reached of empty lane support cost.
Its technical solution is:
The isobaric empty lane method of crossing of a kind of big mining and high comprehensive mining work plane fender may further comprise the steps:
A reduces the work plane mining height
Fully-mechanized mining working mining height Ying Zaiting is reduced to sky lane height before adopting equipressure gently, is used to weaken big mining and high comprehensive mining work plane ore deposit pressure and manifests, and connects the top when connecting smoothly to guarantee work plane and empty lane;
B stays and establishes isobaric fender
After above-mentioned fully-mechanized mining working mining height is reduced to sky lane height, and stop adopting when being advanced into the place ahead, sky lane certain distance, the reservation coal column between fully-mechanized mining working and empty lane is as isobaric fender, and the width of isobaric fender is made as W, and W is preferably 3～4m;
The c work plane is isobaric
The isobaric fender place of fully-mechanized mining working in step b stops adopting equipressure; Isobaric period is made as T; T is preferably 4～12h, and in isobaric period, adopting the concentrated stress that causes will effectively be discharged through the mode of isobaric fender drastic deformation and the distortion of empty lane country rock appropriateness;
D coal mining machine cut passes through isobaric fender and gets into empty lane
Behind isobaric the end, fully-mechanized mining working continues to advance, and after the coal mining machine cut passed through isobaric fender, force piece was passed fast and got into empty lane, safety control top.
Among the above-mentioned steps a, at fully-mechanized mining working during apart from the empty about 30m in lane, the mild mining height that reduces of beginning, the height of reducing to the sky lane by normal big mining height.
Among the above-mentioned steps d, at first take two-way coal cutting straight line feed mode, when unusual big ore deposit pressure appearred in the work plane local location, coal-winning machine preferentially cut the coal column of privileged sites.
The invention provides and a kind ofly press the Roof Control key technology manifest, be i.e. the isobaric technology of fender based on effectively subduing work plane and ore deposit, empty lane.The isobaric technology of so-called fender; Be exactly when the advance of the face to apart from empty lane certain distance when (isobaric fender width), stope initiatively stops to adopt a period of time (isobaric period), makes mining influence with the sharply mode effectively release in advance of the appropriateness distortion of distortion and empty lane country rock of isobaric fender; Coal-winning machine cutting fender gets in the process of empty lane; Work plane and ore deposit, empty lane pressure manifest faint, have stopped the possibility of top board generation catastrophe campaign, have realized that work plane is safely and fast through empty lane.The present invention is simple to operation, labour intensity is low, empty lane support cost is low, cross empty lane weak point consuming time, is the empty lane of a kind of effective mistake technology, has great application prospect.
Useful technique effect of the present invention is in particular in:
One, mining height to the less empty lane height through reducing big mining and high comprehensive mining work plane has effectively been subdued to adopt work plane and ore deposit, empty lane has been pressed the influence degree that manifests, and has guaranteed the no drop butt joint of work plane and empty lane top board simultaneously; Establish rational isobaric fender width and select the fender isobaric period through staying, can guarantee that the mining influence that is harmful to mainly obtains most of release through the remarkable deformation failure mode of isobaric fender in advance; Adopt rational coal-winning machine coal cutting mode, can guarantee that the isobaric back force piece of accomplishing passes fast and get into below, empty lane, realize that the safety control pushes up.
Two, empty lane supporting adopts more simple and effective anchor pole (rope) support pattern can control the top safely; This support pattern can not bear mining influence and the empty lane top board that causes is cut and top board catastrophe campaign such as emitted when both having avoided anisobaric; Also avoided adopting in the empty lane the huge input of brettis or the empty lane control of filler sold stowing heading tape; Thoroughly solved again to jump and adopted removal of home and fall face and cross the drawback that the intrinsic input in sky lane is many, the resources loss amount is big, realized the empty lane of the fast and safely efficient mistake of big mining and high comprehensive mining work plane engineering objective.
Facts have proved, adopt the isobaric technological empty lane of crossing 1 total length 320m, wide 5.4m, high 3.8m, empty lane of crossing of above-mentioned fender, cross sky lane technology, can practice thrift and drop into more than 5,000,000 yuan, more than the saving 12h in man-hour than brettis or the substantial filling of filler; Adopt removal of home and fall face and cross sky lane technology and can practice thrift and drop into more than 1,000 ten thousand yuan than jumping, to practice thrift more than the 144h in man-hour.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further:
Fig. 1 is that observation measuring point plane of arrangement figure is pressed in empty lane of big mining and high comprehensive mining work plane total length and ore deposit.
Fig. 2 reduces the mining height sketch map for fully-mechanized mining working.
Each space relativeness figure when Fig. 3 stops adopting for fully-mechanized mining working.
Fig. 4 is the theoretical in time change curve of the empty lane amount of crushing.
Actual measurement fender isobaric period and roof to floor convergence graph of a relation when Fig. 5 is big mining and high comprehensive mining Coal Face Passing Through sky lane, certain ore deposit.
Fig. 6 is that two-way coal cutting straight line parallel advances coal cutting mode sketch map.
Fig. 7 is for preferentially cutting privileged sites coal column coal cutting mode sketch map.
1. big mining and high comprehensive mining work planes among the figure, the 2. empty lane of the 1st total length in work plane the place ahead, 3. empty lane, 4. goaf of the 2nd total length in work plane the place ahead; 5. haulage way, 6. tailgate, 7. basic working resistance of support measuring point in the fully-mechanized mining working, roof to floor convergence and roof delamination measuring point in the 8. empty lane; 9. coal seam, the 10. basic support of work plane, 11. direct tops, 12. tops always; 13. isobaric fender, connection roadway between 14. empty lanes, 15. coal-winning machines, 16. scratch board conveyors; 17. regional area is pressed in the big ore deposit of work plane, fully-mechanized mining working mining height when h1. normally advances, the empty lane of h2. height, the isobaric fender width of W..
The specific embodiment
In conjunction with Fig. 1 to Fig. 7, the isobaric empty lane method of crossing of a kind of big mining and high comprehensive mining work plane fender may further comprise the steps:
One, reduces the work plane mining height
Manifest for subduing big mining and high comprehensive mining work plane ore deposit pressure, guarantee that work plane and empty lane connect the top smoothly when connecting, when the actual mining identity distance sky about 30m in lane, the mild reduction of beginning mining height is reduced to less empty lane height h2 by normal mining height h1 greatly during to the equipressure beginning.
Two, stay and establish isobaric fender
Work plane reduces and stops adopting isobaric beginning when mining height is advanced into the place ahead, sky lane certain distance, and this distance is identical with the width W of isobaric fender.When W was excessive, coal column had bigger elastic kernel district, and when isobaric, indeformable destruction of coal column or deformation failure are very little, had limited the favourable motion of top top board, did not reach the top plate pressure relief effect; Otherwise when W was too small, coal column did not have the elastic kernel district, did not have ability to stop harmful motion of top board, though reached the release effect, may cause that support kills, empty lane negative group large tracts of land heavy damage and cause the sedimentation of top board mutability or cut roof fall.Therefore, isobaric fender width is too wide and too narrowly all be unfavorable for the release of sky lane.Confirm that the effective method of isobaric fender width is to press observation through on-the-spot ore deposit; Press when macroscopical ore deposit such as work plane and empty lane inside ceiling panel deflection and rib slabbing etc. to manifest beginning and sharply increase, the coal pillar width that this moment, working face wall was just helped to empty lane is rational isobaric fender width.Isobaric fender width is preferably 3～4m.
Three, work plane is isobaric
Work plane stops adopting equipressure at isobaric fender place, and in the isobaric period (T), adopting the concentrated stress that causes will effectively be discharged through the mode of isobaric fender drastic deformation and the distortion of empty lane country rock appropriateness.The work plane isobaric period is unsuitable long; Otherwise under bigger leading bearing pressure effect, top, empty lane top board sharply sinks and disrumpent feelings inbreak, the negative group in empty lane large tracts of land wall caving; The rapid rising of support load might surpass its yield load, and support kills or damages by pressure.When the work plane isobaric period was too short, the release of then empty lane was insufficient, and coal-winning machine cuts isobaric fender and support gets in the process of empty lane, and work plane and empty lane country rock can produce to cut and roof accident such as emit.Equally, confirm that the effective method of fender isobaric period is to press observation through on-the-spot ore deposit, when the isobaric end of sign is pressed when manifesting remarkable mitigations in the ore deposit of empty lane country rock and isobaric fender.Adopt Kelvin's rheological model derivation clearancen lane amount of crushing to combine the empty lane amount of crushing of actual measurement to know for
with the relation of isobaric period; When support got into safety control top, empty lane, about amount of crushing more than 80% occurred in isobaric 4～12h.Therefore, can judge isobaric period based on empty lane roof to floor convergence (a kind of ore deposit the press manifest) curve of actual measurement, when the speed of shifting near levels off to zero the time, sign is isobaric to be finished, and coal-winning machine can begin to cut isobaric fender.Isobaric period is generally 4～12h.
Four, the coal mining machine cut passes through isobaric fender and gets into empty lane
Behind isobaric the end, fully-mechanized mining working continues to advance, and in the progradation, it is slight that force piece resistance and ore deposit, empty lane pressure manifest increment, and isobaric fender wall caving is serious.For making support get into safety control top, empty lane early; Generally take technology the shortest two-way coal cutting straight line feed mode simple and consuming time; When unusual big ore deposit pressure appearred in the work plane local location, coal-winning machine preferentially cut the coal column at this position, and force piece is passed fast and got into empty lane.
After above-mentioned one, two, three, four steps in sequence were implemented, contingent top board catastrophe campaign in the time of effectively having stopped stope and cross the sky lane had realized adopting the big mining and high comprehensive mining work plane of the isobaric technical guarantee of fender fast and safely to pass through the engineering objective in empty lane.
Above-mentioned embodiment is further specified as follows:
(1) understanding to big mining and high comprehensive mining work plane 1, empty lane 2 and the empty lane 3 country rock characteristics of motion is the element task that prevents country rock catastrophe campaign.As shown in Figure 1, stope 1 is at first arranged ore deposit pressure observation point before crossing empty lane 2.The measuring point type mainly comprises: the basic working resistance of support of work plane monitoring point 7 and empty lane roof to floor convergence and roof delamination monitoring point 8.In addition, when big mining and high comprehensive mining work plane 1 pushed away the near-space lane, the country rock of detail record work plane 1 and empty lane 2 and 3 macroscopic view ore deposit was pressed and is manifested.
(2) as shown in Figure 2, for subdue the top board ore deposit press manifest and when guaranteeing that work plane 1 connects with empty lane 2 basic support 10 caunch in the empty lane 2 of entering smoothly.When fully-mechanized mining working 1 was pushed into apart from empty lane 2 about 30m, the mild reduction of beginning mining height was reduced to sky lane height h2 by former big mining height h1.
(3) as shown in Figure 3, confirm that the effective method of isobaric fender 13 width W can press presentation attributes through on-the-spot ore deposit, especially the slabbing situation of rib is confirmed in the work plane 1.When W is big, the less wall caving of rib in the big mining and high comprehensive mining work plane 1 after the coal cutting, the frequency that roof break takes place is little, and the sound is light, when W is suitable, rib large tracts of land, big degree of depth wall caving in the fully-mechanized mining working 1 after the coal cutting, the frequency that roof break takes place is high, and sound is big.The width W of getting isobaric fender 13 is that 3～4m is better.
(4) when the ore deposit of empty lane 2 country rocks and isobaric fender 13 pressure manifests remarkable mitigation, can think isobaric finishes.When work plane 1 stops adopting equipressure, draw empty lane 2 roof to floor convergence curve maps, level off to zero the time, think isobaric and finish, the beginning coal cutting when moving nearly speed.Fig. 5 is space-time lane, the empty lane of big mining and high comprehensive mining Coal Face Passing Through, certain an ore deposit roof to floor convergence change curve.
(5) behind isobaric the end, get into empty lane 2 early, generally take two-way coal cutting straight line parallel propulsion mode for making support 10, as shown in Figure 6; When unusual big ore deposit pressure appearred in work plane local location 17, coal-winning machine 15 preferentially cuts the privileged sites coal column, and was as shown in Figure 7.
(6) after big mining and high comprehensive mining work plane 1 pushed away empty lane 2, implement according to above-mentioned (3), (4), (5) step, pushed away empty lane 3, afterwards, big mining and high comprehensive mining work plane 1 mining height progressively returns to former big mining height h1, recovers the ordinary production of fully-mechanized mining working 1.
The part of not addressing in the aforesaid way is taked or is used for reference prior art and can realize.
Claims (3)
1. one kind big mining and high comprehensive mining work plane fender equipressure is crossed empty lane method, it is characterized in that may further comprise the steps:
A reduces the work plane mining height
Fully-mechanized mining working mining height Ying Zaiting is reduced to sky lane height before adopting equipressure gently, is used to weaken big mining and high comprehensive mining work plane ore deposit pressure and manifests, and connects the top when connecting smoothly to guarantee fully-mechanized mining working and empty lane;
B stays and establishes isobaric fender
After above-mentioned fully-mechanized mining working mining height is reduced to sky lane height, and stop adopting when being advanced into the place ahead, sky lane certain distance, the reservation coal column between fully-mechanized mining working and empty lane is as isobaric fender, and the width of isobaric fender is made as
W,
WBe 3～4m;
The c work plane is isobaric
The isobaric fender place of fully-mechanized mining working in step b stops adopting equipressure, and isobaric period is 4～12h, and in isobaric period, adopting the concentrated stress that causes will effectively be discharged through the mode of isobaric fender drastic deformation and the distortion of empty lane country rock appropriateness;
D coal mining machine cut passes through isobaric fender and gets into empty lane
Behind isobaric the end, fully-mechanized mining working continues to advance, and after the coal mining machine cut passed through isobaric fender, force piece was passed fast and got into empty lane, safety control top.
2. the isobaric empty lane method of crossing of big mining and high comprehensive mining work plane fender according to claim 1 is characterized in that: among the said step a, at fully-mechanized mining working during apart from the empty about 30m in lane, the mild mining height that reduces of beginning is by the mining height height of reducing to the sky lane greatly normally.
3. the isobaric empty lane method of crossing of big mining and high comprehensive mining work plane fender according to claim 1; It is characterized in that: in the said steps d; At first take two-way coal cutting straight line feed mode, when unusual big ore deposit pressure appearred in the work plane local location, coal-winning machine preferentially cut the coal column of privileged sites.
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| CN102778182A (en) * | 2012-07-26 | 2012-11-14 | 山东科技大学 | Beside-roadway escribing pressure relief method of roadway driving along gob of small coal pillar influenced by dynamic pressure |
| CN103244124A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode |
| CN105673013A (en) * | 2016-01-18 | 2016-06-15 | 中国矿业大学(北京) | Exploiting method for working face to pass through cross and complex small coalpit tunnels |
| CN105956304A (en) * | 2016-05-05 | 2016-09-21 | 西安科技大学 | Method and apparatus for determining rated bearing load of bracket for working face with large mining height in coal mine |
| CN109356625A (en) * | 2018-11-07 | 2019-02-19 | 太原理工大学 | A kind of method in high seam second mining Coal Face Passing Through top coal sky lane |
| CN110761792A (en) * | 2019-12-02 | 2020-02-07 | 六盘水师范学院 | Old hole cutting device for coal face and application method |
| CN110847909A (en) * | 2019-11-15 | 2020-02-28 | 山东科技大学 | Method for reducing top plate pressure of withdrawal channel at last stage of coal face extraction |
| CN111636869A (en) * | 2020-04-26 | 2020-09-08 | 华北科技学院 | Roadway protection structure and method for gob-side roadway |
| CN112459782A (en) * | 2020-11-10 | 2021-03-09 | 陈卫军 | Coal mine rock burst treatment method based on F-shaped fully mechanized mining face and with small coal pillars |
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Cited By (14)
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| CN102778182A (en) * | 2012-07-26 | 2012-11-14 | 山东科技大学 | Beside-roadway escribing pressure relief method of roadway driving along gob of small coal pillar influenced by dynamic pressure |
| CN103244124A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode |
| CN103244124B (en) * | 2013-05-22 | 2015-04-22 | 太原理工大学 | Method for coal mine tunnel working surface to pass through abandoned roadway in forced caving pressure relief mode |
| CN105673013B (en) * | 2016-01-18 | 2018-04-06 | 中国矿业大学(北京) | Coal Face Passing Through intersects complicated small coal mine tunnel recovery method |
| CN105673013A (en) * | 2016-01-18 | 2016-06-15 | 中国矿业大学(北京) | Exploiting method for working face to pass through cross and complex small coalpit tunnels |
| CN105956304B (en) * | 2016-05-05 | 2018-12-14 | 西安科技大学 | A kind of specified receiving load determination method of coal mine large-mining-height working surface bracket and device |
| CN105956304A (en) * | 2016-05-05 | 2016-09-21 | 西安科技大学 | Method and apparatus for determining rated bearing load of bracket for working face with large mining height in coal mine |
| CN109356625A (en) * | 2018-11-07 | 2019-02-19 | 太原理工大学 | A kind of method in high seam second mining Coal Face Passing Through top coal sky lane |
| CN109356625B (en) * | 2018-11-07 | 2020-01-03 | 太原理工大学 | Method for passing through top coal empty lane of thick coal seam re-mining working face |
| CN110847909A (en) * | 2019-11-15 | 2020-02-28 | 山东科技大学 | Method for reducing top plate pressure of withdrawal channel at last stage of coal face extraction |
| CN110847909B (en) * | 2019-11-15 | 2020-11-20 | 山东科技大学 | Method for reducing top plate pressure of withdrawal channel at last stage of coal face extraction |
| CN110761792A (en) * | 2019-12-02 | 2020-02-07 | 六盘水师范学院 | Old hole cutting device for coal face and application method |
| CN111636869A (en) * | 2020-04-26 | 2020-09-08 | 华北科技学院 | Roadway protection structure and method for gob-side roadway |
| CN112459782A (en) * | 2020-11-10 | 2021-03-09 | 陈卫军 | Coal mine rock burst treatment method based on F-shaped fully mechanized mining face and with small coal pillars |
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Application publication date: 20120118 |