CN102852523A - 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 the Mineral Engineering field, the layout of work plane open-off cut when being applicable to the half-edge coal seam longwall top coal caving.
Background technology
Half-edge coal seam working face open-off cut eye is arranged general employing angled straight lines type, as adopts open-off cut shown in Figure 1 to arrange along coal seam true dip angle linear, and the inclination angle of its working face open-off cut eye is identical with seam inclination; Or adopting cut sth. askew coal seam linear of open-off cut shown in Figure 2 to arrange, its lower crossheading is arranged on the roof 2 ', so the inclination angle of working face open-off cut eye is different from seam inclination.When arranging this two kinds of angled straight lines type working face open-off cut eyes 3 ', upper crossheading 4 ' and lower crossheading 5 ' respectively with 3 ' the vertical perforation of working face open-off cut eye, therefore equipment very easily glides along seat earth 1 ', the lateral pressure stack of its accumulation forms the lateral load of face end support, work plane easily forms the accident of falling the frame of " domino effect " formula and the integral body of longwall top coal caving equipment glides, work plane rolls very easily impact end head bracket of coal (cash), bury and reprint tail and face end support, the work plane safety and stability is fragile, and management difficulty is large; Conveyer need to tilt to install before and after the work plane simultaneously, and is high to the lubricating requirement of its mechanical part, manufactures and designs difficulty large; On the work plane resource reclaims, when adopting open-off cut to arrange exploitation along coal seam true dip angle linear, exist top coal shown in Figure 1 and reclaim blind area 10 ', when adopting open-off cut to cut sth. askew coal seam linear layout exploitation, exist ground coal shown in Figure 2 and reclaim blind area 20 ', and be all to be difficult to carry out to top coal blind area back production or to the back production of ground coal blind area, so the resource recovery rate is low; Install at working face equipment, because the angled straight lines type is cut the sudden change contact relation that eye exists crossheading and open-off cut, when equipment is put transportation now from cutting, the sliding force that equipment self-weight produces is to be loaded into rapidly on winch and the wire rope by flex point, can produce moment impact to winch and wire rope, bring threat for the safe handling of work plane haulage device, cutting a upper extreme point and cutting a mutually interference of top board generation when this sudden change contact relation also can make highly larger equipment conveying simultaneously, need to caunch and expand pick and secondary supporting cutting a upper end, its safety management is brought very large difficulty.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above-mentioned the deficiencies in the prior art, provide the anti-S shape of a kind of high-dipping fully mechanized coal face to cut the method for arranging of eye, it has reduced the gradient of work plane, effectively prevented the downslide of working face equipment, and installation and the transportation of equipment have been made things convenient for, solve the problem of top board and bottom plate triangular exploitation blind area, improved the 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 method for arranging of eye, comprising:
Cut eye along the linear of layering backplane in coal seam between upper crossheading and lower crossheading;
Lower crossheading and linear are cut changeover portion between the eye be arranged to lower circular arc and cut eye, the center of circle that makes lower circular arc cut eye is positioned at roof;
Upper crossheading and linear are cut changeover portion between the eye be arranged to upper circular arc and cut eye, the center of circle that makes circular arc cut eye is positioned at coal seam layering base plate;
Lower circular arc is cut 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 a following method: arrange that from lower crossheading opening part distance is the gallery of L4; Take the terminal point of described gallery as starting point, the center of circle arranged be positioned at roof, layouts radius of curvature is that R1, central angle are α " lower circular arc cut eye, its destination county and described linear are cut tangent.
Wherein, arrange that described upper circular arc cuts eye and adopt a following method: cut the terminal point of eye as starting point take described linear, the center of circle arranged be positioned at coal seam layering base plate, layouts radius of curvature is that R2, central angle are that the upper circular arc of α ' is cut eye, until itself and the perforation of upper crossheading.
Especially, described R1 determines by following formula:
R1=（L-L4）/tan（α/2）；
Wherein, L is the coal seam lift height;
Wherein, L4=L1+L2+L3, L1 are that the Triangle Coal of haulage way and roof formation is wide, and L2 is the haulage way span width, and L3 is two pairs of transition bracket width;
Wherein, α be linear cut the eye the 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 satisfies: 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 movable side protection plate is all adopted in the both sides of support.
Compared with prior art, the anti-S shape of high-dipping fully mechanized coal face of the present invention cut the eye method for arranging have following advantage:
1) because the present invention adopts the eye of cutting of anti-S shape, improved the stress of carrying out the support of supporting to cutting eye, simplified the support pattern of working face open-off cut eye top and bottom, so that the support system of support is stable, and equipment has been improved in the safety of cutting the intraocular transportation;
2) the work plane gradient of the present invention is little, makes lower end support and work plane crab bearer be in level or nearly level, is convenient to management and using, is the operation of a large amount of basic frame of work plane top high-dipping section and the management guarantee that provides the foundation;
3) because the present invention adopts the eye of cutting of anti-S shape, so that after the top coal (cash) of top let-down tumbled, all alluviation did not cause and buries phenomenons such as reprinting tail and face end support in the lower end support, has therefore improved the safety of production;
4) the present invention adopts the eye of cutting of anti-S shape, has solved work plane underlying seam top board and seat earth triangle exploitation blind zone problem, has improved the rate of extraction of resource.
Below in conjunction with accompanying drawing the present invention is elaborated.
Description of drawings
Fig. 1 is that the open-off cut of prior art is along coal seam true dip angle linear arrangement diagram;
Fig. 2 is the open-off cut of the prior art coal seam linear arrangement diagram of cutting sth. askew;
Fig. 3 is the arrangement diagram 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.
Among the figure: 1 '-seat earth; 2 '-roof; 3 '-working face open-off cut eye; 4 '-upper crossheading; 5 '-lower crossheading; 10 '-top coal reclaims the blind area; 20 '-ground coal reclaims the blind area; The 1-seat earth; The 2-roof; The 3-linear is cut eye; The upper crossheading of 4-; Crossheading under the 5-; The upper circular arc of 6-is cut eye; Circular arc is cut eye under the 7-; 8-coal seam layering base plate.
The specific embodiment
As shown in Figure 3, cut the layout sketch of an embodiment of eye for the anti-S shape of high-dipping fully mechanized coal face of the present invention, 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 the lower crossheading 5;
Lower circular arc is cut 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 cut eye.
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 take the terminal point of gallery as starting point, the center of circle arranged be positioned at roof 2, layouts radius of curvature is that R1, central angle are α " lower circular arc cut 7, its destination county and coal seam layering base plate 8 are tangent;
A2) to cut eye 7 terminal point be starting point to following circular arc, arranges that along coal seam layering base plate 8 linears cut eye 3, stops until being arranged into the upper crossheading of distance 4 a distance;
A3) cut eye 3 terminal point as starting point take linear, the center of circle is arranged be positioned at coal seam layering base plate 8, layouts radius of curvature is that R2, central angle are that the upper circular arc of α ' is cut eye 6, until itself and 4 perforations of upper crossheading.
Wherein, lower circular arc is cut eye 7 radius of curvature R 1 and determined according to seat earth inclination angle and coal seam lift height, and is concrete, can determine by following formula:
R1=（L-L4）/tan（α/2）；
In the formula, L is the coal seam lift height; And, L4=L1+L2+L3, wherein L1 is that the Triangle Coal that consists of of haulage way and roof is wide, and L2 is the haulage way span width, and L3 is two pairs of transition bracket width; α be 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 the formula, β is drag conveyor permission flexibility in vertical direction, β=3 °; B is the length of every joint drag conveyor chute.
And the inclination alpha that linear is cut eye 3 equals the central angle alpha that lower circular arc is cut eye 7 ".
Anti-S shape is cut the radius of curvature R 2 that the upper circular arc on the eye is cut eye 6, requires to determine according to non-power traction equipment curvature under the coal mine, and radius of curvature is taken as 6m-9m.
The upper circular arc that anti-S shape is cut eye is cut eye and lower circular arc and is cut and carry out supporting by support respectively, when adopting bracket support, the base length of support should be greater than the length of the back timber of support, and movable side protection plate is all adopted in the both sides of support, thereby can solve the problem of the different lengths of curve of arc stent back timber and base.
In the present invention, the tilt angle gamma of coal seam layering base plate satisfies: 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.
In the concrete placement process of cutting eye, the mode that also can adopt the tilt angle gamma of coal seam layering base plate to be different from the seat earth inclination angle is carried out the layout of working face open-off cut eye.
Cut the equipment installation end of eye when anti-S shape after, lower circular arc is cut eye owing to being to prevent front and back transporter, synthetical support anti-skid and keep anti-S shape to cut stable ground of eye bracket needs, because its radius of curvature can satisfy the requirement of coal-winning machine length, therefore lower circular arc is not cut the adjustment that eye is made the position attitude; The radius of curvature of cutting eye owing to upper circular arc is less, can not satisfy coal-winning machine length is cut a flexibility to being anti-S shape requirement, therefore needs to cut eye to upper circular arc and progressively carries out an attitude 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, obtains good technical security benefit in the layout of Dong Xia colliery 37220-1 mechanized Caving Mining Face.In application, the working face open-off cut eye is arranged as anti-S shape cuts eye, and the section of cutting eye is rectangular cross section, its clear span is 7.0m, clear height is 2.5m, adopt the support pattern of anchor rete cord+monomer column combined supporting, all devices of all devices except the rubber conveyer of lower crossheading that work plane is installed all is transported to the installation site from the working face open-off cut eye.
At 2 JH-30 of the parallel installation of the big section of cutting position of center line type winch, the wire rope specification is 6 * 37-36.Winch base is made the high strength earth anchor, and building figure according to the basis, to adopt C30 concrete match ratio stone bolt to build fixing, and equipment uses special-purpose slide rail and slide plate gravity haulage, and support is laterally put from sliding down.
Work plane was installed end since equipment installation on December 12nd, 2011 to December 30.Installation work is safe and orderly, 5 pairs of the maximum mounting brackets of split run.After job interview was produced, by the back production adjustment of 7m, work plane had been eliminated upper end circular arc vertical curve smoothly, and working face mining position attitude is satisfactorily adjusted, and has obtained preferably 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 significant technique effect:
1) improved the support force state, reduced the lateral thrust of the basic support in inclined-plane to face end support, the lateral pressure of work plane accumulative total is distributed on the transition frame and the most basic frame of lower arc section, contained that effectively the integral body take support as main longwall top coal caving equipment glides and support tilt, has improved the stability of support system.
2) conveyer, elevating conveyor and lower end support etc. can use and use ripe common apparatus in the longwall top coal caving under flat seam or inclined seam condition before and after the work plane, greatly reduce the technical difficulty of capital equipment.Simultaneously, improved the Matching Relationship between the size relationship of Head Section machine lane, lower end and working face open-off cut eye and face end support, transition bracket, elevating conveyor, the scraper plate head, the stability of force piece and good production technology state have been had critical impact.
3) make lower end support and work plane crab bearer be in level or nearly level, be convenient to management and using, be the operation of a large amount of basic frame of work plane top high-dipping section and the management guarantee that provides the foundation.
4) after the top coal (cash) of top let-down tumbled, all alluviation did not cause and buries phenomenons such as reprinting tail and face end support in the lower end support.
5) solve top, work plane bottom, bottom plate triangular exploitation blind zone problem, improved the resource recovery rate.
6) overcome and cut eye and the sudden change contact relation of upper crossheading when support is transferred, made equipment transfer the slow uniform load of sliding force that the Shi Youqi deadweight produces on winch and wire rope, raising equipment is in the safety of cutting intraocular and transporting,
When in open-off cut, transporting when 7) having solved highly larger equipment conveying, when upper crossheading contacts with the sudden change of open-off cut and cut mutual interference between the top board, upper end is no longer caunched expand pick and secondary supporting, simplified the support pattern of working face open-off cut eye upper end.
Because the present invention has broken through the theory that the fully mechanized coal face linear pattern is arranged, adopt anti-S shape to cut the method for arranging of eye, overcome the angled straight lines type and combined the shortcoming of putting open-off cut, improved the stability of working face equipment and support system, reduced the difficulty of safety management.
Although above the present invention has been done detailed description; but the invention is not restricted to this; those skilled in the art can principle according to the present invention make amendment, and therefore, all various modifications of carrying out according to principle of the present invention all should be understood to fall into protection scope of the present invention.
Claims (10)
1. the anti-S shape of high-dipping fully mechanized coal face is cut the method for arranging of eye, it is characterized in that, comprising:
Cut eye along the linear of layering backplane in coal seam between upper crossheading and lower crossheading;
Lower crossheading and linear are cut changeover portion between the eye be arranged to lower circular arc and cut eye, the center of circle that makes lower circular arc cut eye is positioned at roof;
Upper crossheading and linear are cut changeover portion between the eye be arranged to upper circular arc and cut eye, the center of circle that makes circular arc cut eye is positioned at coal seam layering base plate;
Lower circular arc is cut eye, linear cuts eye and upper circular arc and cuts eye and be in turn connected to form anti-S shape and cut eye.
2. method for arranging according to claim 1 is characterized in that, arranges that described lower circular arc cuts eye and adopt a following method:
Arrange that from lower crossheading opening part distance is the gallery of L4;
Take the terminal point of described gallery as starting point, the center of circle arranged be positioned at roof, layouts radius of curvature is that R1, central angle are α " lower circular arc cut eye, its destination county and described linear are cut tangent.
3. method for arranging according to claim 1 and 2 is characterized in that, arranges that described upper circular arc cuts eye and adopt a following method:
The terminal point of cutting eye take described linear is as starting point, the center of circle arranged be positioned at coal seam layering base plate, and layouts radius of curvature is that R2, central angle are that the upper circular arc of α ' is cut eye, until itself and the perforation of upper crossheading.
4. according to claim 2 or 3 described method for arranging, it is characterized in that, described R1 determines by following formula:
R1=（L-L4）/tan（α/2）；
Wherein, L is the coal seam lift height;
Wherein, L4=L1+L2+L3, L1 are that the Triangle Coal of haulage way and roof formation is wide, and L2 is the haulage way span width, and L3 is two pairs of transition bracket width;
Wherein, α be linear cut the eye the inclination angle (°).
5. method for arranging according to claim 4 is characterized in that, 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.
6. method for arranging according to claim 5 is characterized in that, described α=α ".
7. method for arranging according to claim 1 is characterized in that, the tilt angle gamma of described coal seam layering base plate satisfies: 45 °＜γ＜65 °.
8. method for arranging according to claim 3 is characterized in that, described R2 is 6m-9m.
9. method for arranging according to claim 1 is characterized in that, described upper circular arc is cut eye and lower circular arc and cut and carry out supporting by support respectively.
10. method for arranging according to claim 9 is characterized in that, the base length of described support is greater than the length of the back timber of support, and movable side protection plate is all adopted in the both sides of support.
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| CN104314566A (en) * | 2014-08-21 | 2015-01-28 | 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 |
| CN105370282A (en) * | 2015-12-05 | 2016-03-02 | 西安科技大学 | High section trend wall-type fully mechanized caving mining method for large inclined super high seam |
| CN105649628A (en) * | 2016-01-15 | 2016-06-08 | 西安科技大学 | False-inclined inclination-angle-variable arrangement method for large-dip-angle coal seam angle-variable fully-mechanized coal mining/caving working face |
| 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314566A (en) * | 2014-08-21 | 2015-01-28 | 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 |
| 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 |
| CN105370282A (en) * | 2015-12-05 | 2016-03-02 | 西安科技大学 | High section trend wall-type fully mechanized caving mining method for large inclined super high seam |
| CN105649628A (en) * | 2016-01-15 | 2016-06-08 | 西安科技大学 | False-inclined inclination-angle-variable arrangement method for large-dip-angle coal seam angle-variable fully-mechanized coal mining/caving working face |
| 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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| CN102852523B (en) | 2016-05-04 |
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