CN102852523B - Method for arranging reverse S-shaped cutting holes of steeply inclined fully mechanized caving face - Google Patents
Method for arranging reverse S-shaped cutting holes of steeply inclined fully mechanized caving face Download PDFInfo
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Abstract
The invention discloses a method for arranging reverse S-shaped cutting holes on a steeply inclined fully mechanized caving face, which comprises the following steps: arranging linear cutting holes between the upper gate way and the lower gate way along the coal seam layered bottom plate; arranging a transition section between the lower crossheading and the linear cutting hole into a lower arc-shaped cutting hole, and enabling the circle center of the lower arc-shaped cutting hole to be located on the coal seam roof; arranging a transition section between the upper crossheading and the linear cutting hole into an upper arc-shaped cutting hole, and enabling the circle center of the upper arc-shaped cutting hole to be positioned on the coal seam layered bottom plate; and sequentially connecting the lower arc-shaped cutting hole, the linear cutting hole and the upper arc-shaped cutting hole to form the reverse S-shaped cutting hole. The method for arranging the reverse S-shaped cutting holes on the steeply inclined fully mechanized caving face reduces the gradient of the face, effectively prevents equipment on the face from sliding downwards, facilitates the installation and transportation of the equipment, solves the problem of triangular mining blind areas of a top plate and a bottom plate at the lower part of the face, and improves the resource recovery rate.
Description
Technical field
The invention belongs to Mineral Engineering field, the cloth of working face open-off cut while being applicable to half-edge coal seam longwall top coal cavingPut.
Background technology
Half-edge coal seam working face open-off cut eye is arranged the general angled straight lines type that adopts, as adopted the open-off cut as shown in Fig. 1Arrange along coal seam true dip angle linear, the inclination angle of its working face open-off cut eye is identical with seam inclination; Or employing Fig. 2 instituteCut sth. askew coal seam linear of the open-off cut showing arranges, it is upper that its lower crossheading is arranged in roof 2 ', therefore working faceThe inclination angle of cutting eye is different from seam inclination. While arranging this two kinds of angled straight lines type working face open-off cut eyes 3 ', upper crossheading 4 'With the perforation vertical with working face open-off cut eye 3 ' respectively of lower crossheading 5 ', therefore equipment very easily glides along seat earth 1 ',The lateral pressure stack of its accumulation forms the lateral load of face end support, and working face easily forms " dominoesEffect " accident of falling frame of formula and the downslide of the entirety of longwall top coal caving equipment, working face rolls very easily impact end of coal (cash)Head bracket, buries and reprints tail and face end support, working face safety and stability fragility, and management difficulty is large;Before and after working face, conveyer need to tilt to install simultaneously, high to the lubricating requirement of its mechanical part, manufactures and designs difficultyDegree is large; On working face resource reclaims, in the time adopting open-off cut to arrange exploitation along coal seam true dip angle linear, depositReclaim blind area 10 ' at the top coal shown in Fig. 1, in the time adopting open-off cut to cut sth. askew coal seam linear layout exploitation, depositReclaim blind area 20 ' at ground coal shown in Fig. 2, and no matter be to top coal blind area back production or ground coal blind area is returnedAdopt and be all difficult to carry out, therefore resource recovery rate is low; Install at working face equipment, because angled straight lines type is cut eyeExist the sudden change contact relation of crossheading and open-off cut, in the time that equipment is put transport now from cutting, equipment self-weight producesRaw sliding force is to be loaded into rapidly on winch and steel wire rope by flex point, can produce moment winch and steel wire ropeImpact, bring threat to the safe handling of working face transporting equipment, this sudden change contact relation also can make height simultaneouslyWhile spending larger equipment conveying, cutting a upper extreme point and cutting a top board generation interference mutually, need to be to cutting a upper endCaunch and expand pick and secondary supporting, its safety management is brought to very large difficulty.
Summary of the invention
Object of the present invention is exactly in order to overcome above-mentioned the deficiencies in the prior art, and a kind of high-dipping is providedThe anti-S shape of fully mechanized coal face is cut the method for arranging of eye, and it has reduced the gradient of working face, has effectively prevented working faceThe downslide of equipment, and facilitated installation and the transport of equipment, solve asking of top board and bottom plate triangular exploitation blind areaTopic, has improved resource recovery rate.
For realizing above-mentioned purpose of the present invention, the anti-S shape of high-dipping fully mechanized coal face of the present invention is cut the layout side of eyeMethod, comprising:
Linear along coal seam layering backplane between upper crossheading and lower crossheading is cut eye;
Lower crossheading and linear are cut to changeover portion between eye and be arranged to lower circular arc and cut eye, make lower circular arc cut eyeThe center of circle be positioned at roof;
Upper crossheading and linear are cut to changeover portion between eye and be arranged to upper circular arc and cut eye, make circular arc cut eyeThe center of circle be positioned at coal seam layering base plate;
Lower circular arc is cut to eye, linear cuts eye and upper circular arc and cuts eye and be in turn connected to form anti-S shape and cut eye.
Wherein, arrange that described lower circular arc cuts eye and adopt with the following method: arrange that from lower crossheading opening part distance isThe gallery of L4; Taking the terminal of described gallery as starting point, the center of circle is arranged and is positioned at roof, arrange curvature halfFootpath is that R1, central angle are α " lower circular arc cut eye, make its destination county and described linear cut eye tangent.
Wherein, arrange described upper circular arc cut eye adopt with the following method: taking described linear cut eye terminal forPoint, arranges the center of circle to be positioned at coal seam layering base plate, and layout radius of curvature is the upper circle that R2, central angle are α 'Arc is cut eye, until itself and upper crossheading connect.
Especially, described R1 determines by following formula:
R1=（L-L4）/tan（α/2）；
Wherein, L is coal seam lift height;
Wherein, L4=L1+L2+L3, L1 is that the Triangle Coal of haulage way and roof formation is wide, L2 is fortuneDefeated gallery span width, L3 is two pairs of transition bracket width;
Wherein, α be linear cut eye inclination angle (°).
Further, described α determines by following formula:
α=2tan-1[2(L-L4)tanβ/B]；
Wherein, β is drag conveyor permission flexibility in vertical direction, β=3 °;
Wherein, B is the length of every joint drag conveyor chute.
Especially, described α=α ".
Preferably, the tilt angle gamma of described coal seam layering base plate meets: 45 ° < γ < 65 °.
Preferably, described R2 is 6m-9m.
Preferably, described upper circular arc is cut eye and lower circular arc and is cut and carry out supporting by support respectively.
Further, the base length of described support is greater than the length of the back timber of support, and all adopt the both sides of supportUse movable side protection plate.
Compared with prior art, the anti-S shape of high-dipping fully mechanized coal face of the present invention cut eye method for arranging have asLower advantage:
1) adopt the eye of cutting of anti-S shape due to the present invention, improved a stressed shape that carries out the support of supporting to cutting eyeState, has simplified the support pattern of working face open-off cut eye top and bottom, makes the support system of support stable, and makesEquipment is improved in the security of cutting intraocular transport;
2) the working face gradient of the present invention is little, makes lower end support and working face crab bearer in level or nearLevel, is convenient to management and using, is operation and the pipe of a large amount of basic frame of working face top high-dipping sectionManage the guarantee that provides the foundation;
3) adopt the eye of cutting of anti-S shape due to the present invention, after the top coal (cash) of top let-down is tumbled, noThe whole alluviation of meeting, in lower end support, causes and buries phenomenons such as reprinting tail and face end support, has therefore improvedThe security of producing;
4) the present invention adopts the eye of cutting of anti-S shape, has solved working face underlying seam top board and seat earth triangleExploit blind zone problem, improved the rate of extraction of resource.
Below in conjunction with accompanying drawing, the present invention is elaborated.
Brief description of the drawings
Fig. 1 is that the open-off cut of prior art is along coal seam true dip angle linear layout drawing;
Fig. 2 is the open-off cut of the prior art coal seam linear layout drawing of cutting sth. askew;
Fig. 3 is the layout drawing that the anti-S shape of high-dipping fully mechanized coal face of the present invention is cut an embodiment of eye;
Fig. 4 is the layout sketch that lower circular arc of the present invention is cut an embodiment of eye.
In figure: 1 '-seat earth; 2 '-roof; 3 '-working face open-off cut eye; 4 '-upper crossheading; 5 '-Lower crossheading; 10 '-top coal reclaims blind area; 20 '-ground coal reclaims blind area; 1-seat earth; 2-roof;3-linear is cut eye; The upper crossheading of 4-; Crossheading under 5-; The upper circular arc of 6-is cut eye; Under 7-, circular arc is cut eye; 8-coal seamLayering base plate.
Detailed description of the invention
As shown in Figure 3, cut the layout of an embodiment of eye for the anti-S shape of high-dipping fully mechanized coal face of the present inventionSketch, the method for arranging that this anti-S shape is cut eye comprises:
Cut eye 3 along coal seam layering base plate 8 cloth setting in the linear between upper crossheading 4 and lower crossheading 5;
Lower crossheading 5 and linear are cut to changeover portion between eye 3 and be arranged to lower circular arc and cut eye 7, make lower circular arcThe center of circle that shape is cut eye 7 is positioned at roof 2;
Upper crossheading 4 and linear are cut to changeover portion between eye 3 and be arranged to upper circular arc and cut eye 6, make circular arcThe center of circle that shape is cut eye 6 is positioned at coal seam layering base plate 8;
Lower circular arc is cut to eye 7, linear cuts eye 3 and upper circular arc and cuts eye 6 and be in turn connected to form anti-S shape and cutEye.
Concrete, as shown in Figure 4, arrange that anti-S shape is cut eye and comprised the steps:
A1) arrange that from lower crossheading 5 opening parts distance is the gallery of L4, then taking the terminal of gallery as starting point,By the center of circle arrange be positioned at roof 2, layout radius of curvature is that R1, central angle are α " lower circular arc cutEye 7, its destination county and coal seam layering base plate 8 are tangent;
A2) to cut eye 7 terminal be starting point to following circular arc, arranges that along coal seam layering base plate 8 linear cuts eye 3,Stop until being arranged into distance upper crossheading 4 a distance;
A3) terminal of cutting eye 3 taking linear, as starting point, arranges the center of circle to be positioned at coal seam layering base plate 8, arrangesRadius of curvature is that upper circular arc that R2, central angle are α ' is cut eye 6, until itself and upper crossheading 4 connect.
Wherein, lower circular arc is cut eye 7 radius of curvature R 1 and is entered according to seat earth inclination angle and coal seam lift heightRow is definite, concrete, can determine by following formula:
R1=（L-L4）/tan（α/2）；
In formula, L is coal seam lift height; And, L4=L1+L2+L3, wherein L1 be haulage way withThe Triangle Coal that roof forms is wide, and L2 is haulage way span width, and L3 is two pairs of transition bracket width; αFor linear cut eye 3 inclination angle (°).
Further, linear is cut eye 3 inclination alpha and is determined by following formula:
α=2tan-1[2(L-L4)tanβ/B]；
In formula, β is drag conveyor permission flexibility in vertical direction, β=3 °; B is that every joint is scrapedThe length of plate conveyer chute.
And linear is cut the central angle alpha that eye 3 inclination alpha equals lower circular arc and cuts eye 7 ".
The upper circular arc that anti-S shape is cut a upper end is cut the radius of curvature R 2 of eye 6, leads according to non-power under coal mineDraw equipment curvature and require to determine, radius of curvature is taken as 6m-9m.
Anti-S shape cut eye upper circular arc cut eye and lower circular arc cut eye carry out supporting by support respectively, employingWhen bracket support, the base length of support should be greater than the length of the back timber of support, and the both sides of support all adoptMovable side protection plate, thus the problem of the different lengths of curve of arc stent back timber and base can be solved.
In the present invention, the tilt angle gamma of coal seam layering base plate meets: 45 ° < γ < 65 °.
In the present embodiment, the tilt angle gamma of coal seam layering base plate is identical with the inclination angle of seat earth.
Cutting in the concrete placement process of eye, at the bottom of also can adopting the tilt angle gamma of coal seam layering base plate to be different from coal seamThe mode at plate inclination angle is carried out the layout of working face open-off cut eye.
When anti-S shape cut eye equipment install finish after, lower circular arc cut eye due to be prevent before and after transporter, combinePut anti-down anti-skid bracket and keep the anti-S shape needs of cutting eye bracket stability, because its radius of curvature can meetThe requirement of coal-winning machine length, does not therefore cut an adjustment of making position state to lower circular arc; Due to upper circular arc cut eyeRadius of curvature is less, can not meet coal-winning machine length and cut being anti-S shape the requirement of a flexibility, therefore needs upperCircular arc is cut eye and is progressively carried out a state adjustment, makes it progressively become straight line.
The anti-S shape of high-dipping fully mechanized coal face of the present invention is cut the arrangement of eye, at Dong Xia colliery 37220-1In the layout of mechanized Caving Mining Face, obtain good technical security benefit. In application, by working face open-off cut eye clothBe set to anti-S shape and cut eye, and cut eye section be rectangular cross section, its clear span is 7.0m, clear height is 2.5m, adoptsWith the support pattern of anchor rete cord+monomer column combined supporting, all devices that working face is installed is except the adhesive tape of lower crossheadingAll devices outside conveyer is all transported to installation site from working face open-off cut eye.
At 2 JH-30 type winches of the parallel installation of the big section of cutting a position of center line, steel wire rope specification is 6× 37-36. Winch base is made high strength earth anchor, builds figure adopt C30 concrete match ratio lower margin spiral shell according to basisBolt is built fixing, and equipment uses special slide rail and slide plate gravity haulage, and support is laterally put from sliding down.
Working face, since equipment installation on December 12nd, 2011, was installed and is finished to December 30. ErectorDo safe and orderly, 5 pairs of the maximum mounting brackets of split run. After job interview is produced, by the back production adjustment of 7m,Working face has been eliminated upper end circular arc vertical curve smoothly, and working face mining position state is satisfactorily adjusted, and has obtainedGood technical security benefit.
Adopt the anti-S shape of high-dipping fully mechanized coal face of the present invention to cut the arrangement of eye, can obtain following significantTechnique effect:
1) improve support force state, reduced the lateral thrust of the basic support in inclined-plane to face end support, willThe lateral pressure of working face accumulative total is distributed in the transition frame and the most basic frame of lower arc section, effectively contained withSupport is that the entirety of master's longwall top coal caving equipment glides and support tilt, has improved the stability of support system.
2) before and after working face, conveyer, elevating conveyor and lower end support etc. can use at flat seamOr under inclined seam condition, in longwall top coal caving, used ripe common apparatus, greatly reduce the skill of capital equipmentArt difficulty. Meanwhile, the size relationship of Head Section machine lane, lower end and working face open-off cut eye and face end support, transition have been improvedMatching Relationship between support, elevating conveyor, scraper plate head, the stability to force piece and good productionState of the art has critical impact.
3) make lower end support and working face crab bearer in level or nearly level, be convenient to management andUsing, is the operation of a large amount of basic frame of working face top high-dipping section and the management guarantee that provides the foundation.
4) after the top coal (cash) of top let-down tumbles, all alluviation, in lower end support, does not causeBury phenomenons such as reprinting tail and face end support.
5) solve top, working face bottom, bottom plate triangular exploitation blind zone problem, improved resource recovery rate.
6) overcome the sudden change contact relation of cutting eye and upper crossheading when support is transferred, when equipment is transferred by itThe slow uniform load of sliding force that deadweight produces is on winch and steel wire rope, and raising equipment is being cut the peace of intraocular transportQuan Xing,
7) while transport in open-off cut while having solved highly larger equipment conveying, upper crossheading and open-off cut prominentBecome when contact and cut the mutual interference between a top board, upper end no longer being caunched expand pick and secondary supporting,Simplify the support pattern of working face open-off cut eye upper end.
Because the present invention has broken through the theory that fully mechanized coal face linear pattern is arranged, adopt anti-S shape to cut the layout side of eyeMethod, has overcome angled straight lines type and has combined the shortcoming of putting open-off cut, has improved the stable of working face equipment and support systemProperty, has reduced the difficulty of safety management.
Although the present invention is explained in detail, the invention is not restricted to this, the technology people of the art aboveMember can principle according to the present invention modify, therefore, and all various amendments of carrying out according to principle of the present inventionAll should be understood to fall into protection scope of the present invention.
Claims (8)
1. the anti-S shape of high-dipping fully mechanized coal face is cut a method for arranging for eye, it is characterized in that, comprising:
Between upper crossheading and lower crossheading, cut eye along coal seam layering backplane linear;
Lower crossheading and linear are cut to changeover portion between eye and be arranged to lower circular arc and cut eye, make lower circular arc cut eyeThe center of circle be positioned at roof;
Upper crossheading and linear are cut to changeover portion between eye and be arranged to upper circular arc and cut eye, make circular arc cut eyeThe center of circle be positioned at coal seam layering base plate;
Lower circular arc is cut to eye, linear cuts eye and upper circular arc and cuts eye and be in turn connected to form anti-S shape and cut eye;
Wherein, arrange described upper circular arc cut eye adopt with the following method:
The terminal of cutting eye taking described linear, as starting point, arranges the center of circle to be positioned at coal seam layering base plate, arrangesRadius of curvature is that the upper circular arc that R2, central angle are α ' is cut eye, until itself and upper crossheading connect;
Wherein, the tilt angle gamma of described coal seam layering base plate meets: 45 ° < γ < 65 °.
2. method for arranging according to claim 1, is characterized in that, arranges that described lower circular arc cuts eyeAdopt with the following method:
Arrange that from lower crossheading opening part distance is the gallery of L4;
Taking the terminal of described gallery as starting point, the center of circle is arranged and is positioned at roof, layout radius of curvature be R1,Central angle is α " lower circular arc cut eye, make its destination county and described linear cut eye tangent;
Wherein, L4=L1+L2+L3, L1 is that the Triangle Coal of haulage way and roof formation is wide, L2 is fortuneDefeated gallery span width, L3 is two pairs of transition bracket width.
3. method for arranging according to claim 2, is characterized in that, described R1 is by following formulaDetermine:
R1＝(L-L4)/tan(α/2)；
Wherein, L is coal seam lift height;
Wherein, α is the inclination angle that linear is cut eye.
4. method for arranging according to claim 3, is characterized in that, described α is true by following formulaFixed:
α＝2tan-1[2(L-L4)tanβ/B]；
Wherein, β is drag conveyor permission flexibility in vertical direction, β=3 °;
Wherein, B is the length of every joint drag conveyor chute.
5. method for arranging according to claim 4, is characterized in that, described α=α ".
6. method for arranging according to claim 1, is characterized in that, the span of described R2 is 6m-9m。
7. method for arranging according to claim 1, is characterized in that, described upper circular arc cut eye and underCircular arc is cut eye and is carried out supporting by support respectively.
8. method for arranging according to claim 7, is characterized in that, the base length of described support is largeIn the length of the back timber of support, and the both sides of support all adopt movable side protection plate.
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| CN104314566B (en) * | 2014-08-21 | 2016-03-16 | 中煤科工集团重庆研究院有限公司 | Coal mining method for inclined cutting and subsection top coal caving of steep coal seam |
| CN105370282B (en) * | 2015-12-05 | 2017-10-13 | 西安科技大学 | The big high section of inclined super high seam moves towards that wall type is comprehensive to put coal-mining method |
| CN105649628B (en) * | 2016-01-15 | 2018-07-10 | 西安科技大学 | The large-inclination-angle coal bed comprehensive coal mining caving working face puppet of varied angle, which is faced upward, tiltedly becomes inclination angle method for arranging |
| CN115059502A (en) * | 2022-07-14 | 2022-09-16 | 国家能源集团宁夏煤业有限责任公司 | Method for transporting equipment for coal seam mining |
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| CN101876253A (en) * | 2009-04-29 | 2010-11-03 | 宝钢集团新疆八一钢铁有限公司 | Working surface layout method for mining steeply dipping coal seam |
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