CN203925576U - The gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct - Google Patents
The gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct Download PDFInfo
- Publication number
- CN203925576U CN203925576U CN201420249511.2U CN201420249511U CN203925576U CN 203925576 U CN203925576 U CN 203925576U CN 201420249511 U CN201420249511 U CN 201420249511U CN 203925576 U CN203925576 U CN 203925576U
- Authority
- CN
- China
- Prior art keywords
- mesh reinforcement
- steel mesh
- pack
- goaf
- spoil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 239000010959 steel Substances 0.000 claims abstract description 85
- 230000002787 reinforcement Effects 0.000 claims abstract description 61
- 238000007569 slipcasting Methods 0.000 claims abstract description 19
- 239000011378 shotcrete Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 239000011440 grout Substances 0.000 claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract description 18
- 239000003245 coal Substances 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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Abstract
The utility model discloses a kind of gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct, it near goaf side be provided with concave surface towards goaf " the steel mesh reinforcement of [" shape, steel mesh reinforcement top planes is fixed between two row's anchor poles of goaf side, steel mesh reinforcement base plane is anchored in floor rock, in steel mesh reinforcement, pile up the pack wall that has goaf natural caving to form, there is one deck gunite layer on steel mesh reinforcement and pack wall surface, in pack wall, be embedded with slip casting steel pipe with holes, by slip casting steel pipe, in pack wall, be marked with cement grout, after cement grout solidifies, thereby adopting sky side--steel pipe--spoil composite bearing body of wall that is built into steel mesh reinforcement along tunnel.The utility model has strengthened the supporting intensity of the other compound roof in lane, has prevented from that roadside support body top top board from collapsing to emit, and has guaranteed the integrality of compound roof.
Description
Technical field
The utility model relates to coal mine support technology, relates in particular to the gob-side entry retaining support structure of compound roof inclined seam.
Background technology
Gob side entry retaining is along gob edge, to retain a tunnel for next section work plane at work plane rear, is a major reform of Coal Mining Technology.Technique not only reduced tunnel driving amount, alleviated digging and taken over contradiction, also there is the face moving time of shortening, cancel island working face, improve coal resources recovery ratio, prevent Period of Coal Seam Spontaneous Combustion and extend the plurality of advantages such as mine service-life, adopt edge air gallery technology also thering is huge superiority aspect the major accident disaster of control colliery simultaneously.
Existing gob-side entry retaining method is mainly that the other high water filling and support in the intensive single-column supporting of employing, the pile supporting of spoil bag and lane is main, stay lane effect better, but for compound roof inclined seam occurrence condition, gob side entry retaining is but difficult to accomplish.
The technology more close with the utility model is, the construction method of the disclosed a kind of filled wall body for gob-side entry retaining of large-inclination coal seam of China Patent Publication No. CN101864987A, in Liu lane, stope rear portion, bogie side frame is established intensive individual prop, the lane space at stope rear portion is retained, along intensive individual prop, set up anti-down post in an opposite direction, and lay steel mesh reinforcement and high strength fibre cloth in the close goaf of intensive individual prop one side, construct interception goaf spoil structure; Erecting dense individual props spoil slides to down under Gravitative Loads voluntarily along high inclination-angle floor strata that steel mesh reinforcement and high strength fibre cloth form stops spoil structure, wait for spoil accumulation to a certain extent, to close, stay the part caved gangue of lane side to carry out the cementing reinforcing of slip casting, form filled wall, propelling with work plane, circulation, constructs until complete whole filled wall bodies of gob-side retained entries successively.Because its steel mesh reinforcement is laid along seat earth to the full section of roof, after laying, the top of steel mesh reinforcement and bottom are on same facade, after forming pack wall, steel mesh reinforcement is closely attached to pack wall surface, the top of steel mesh reinforcement and bottom do not extend in pack wall, reduced the globality of roadside packing body of wall, there is certain inclination angle in ocurrence of coal seam simultaneously, when goaf, spoil emits backwardness, the spoil of a large amount of inbreaks is pushed one side in goaf from slipping, the lateral impact active force larger to roadside support structure generation, make the gear cash filled wall inclination unstability of once constructing, cause staying lane failure.In addition, due to compound roof supporting capacity a little less than, soft frangible, above roadside support body, easily there is top board and collapse and emit, the ability that rock stratum loses carrying and transmitted load, strengthens Liao Liu lane difficulty.Therefore under compound roof inclined seam condition, this support technology is needed badly and is improved and development.
Utility model content
In order to overcome the deficiency of existing gob-side entry retaining method, the utility model provides a kind of gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct.
For achieving the above object, gob-side entry retaining support structure of the present utility model is: it be near goaf side be provided with concave surface towards goaf " the steel mesh reinforcement of [" shape, steel mesh reinforcement top planes is fixed between two row's anchor poles of goaf side, steel mesh reinforcement base plane is anchored in floor rock, in steel mesh reinforcement, pile up the pack wall that has goaf natural caving to form, there is one deck gunite layer on steel mesh reinforcement and pack wall surface, in pack wall, be embedded with slip casting steel pipe with holes, by slip casting steel pipe, in pack wall, be marked with cement grout, after cement grout solidifies, thereby adopting sky side--steel pipe--spoil composite bearing body of wall that is built into steel mesh reinforcement along tunnel.
The construction method of the utility model supporting and protection structure is:
The first step, when driving is prepared the coal cutting roadway of gob side entry retaining, tunnel compound roof is carried out to anchor cable, combining anchor supporting, compound roof is anchored on firm tight roof, prevent compound roof in gob side entry retaining process across falling;
Second step, along with coal seam stope is pushed ahead, at goaf side, be hung with steel mesh reinforcement, during suspension, first steel mesh reinforcement top is fixed between two row's anchor poles of goaf side, now, steel mesh reinforcement is one " " " shape, is then close to the intensive hydraulic prop of interlaced arrangement outside steel mesh reinforcement and with the anti-down post in an opposite direction of cap; intensive hydraulic prop and anti-down post are in an opposite direction pressed in steel mesh reinforcement on compound roof after folding to adopting sky side, and it is double-deck forming top
shape steel mesh reinforcement; Steel mesh reinforcement bottom land used is anchored in floor rock, thereby constructs Yi Ci lane other gear cash device;
The 3rd step, along with stope continue push ahead, goaf spoil natural caving, the spoil of inbreak is along base plate from slipping, and the steel mesh reinforcement of Bei Yici lane other gear cash device blocks, and piles up until approach balkstone gradually; Then, near rib one side and apart from again setting up the intensive hydraulic prop of row's interlaced arrangement and with the anti-down post in an opposite direction of cap in a distance of Yi Ci lane other gear cash device; Now withdraw again hydraulic prop and the anti-down post in an opposite direction of Yi Ci lane other gear cash device, make the steel mesh reinforcement top of Yi Ci lane other gear cash device lose barrier effect, under the lateral forces of caved gangue, the stressed outside extruding of steel mesh reinforcement is outstanding, under the restriction of the intensive hydraulic prop of newly establishing, steel mesh reinforcement is deformed into that " [" shape, forms secondary lane other gear cash device thereby construct gradually;
The 4th step, along with stope continue push ahead, above goaf immediate roof is constantly caving, the spoil landing of inbreak " in [" shape steel mesh reinforcement, is piled up gradually and contacts with roof, forming stable pack wall to secondary gear cash device;
The 5th step, in the pack wall forming, bury upper, middle and lower three row slip casting steel pipe with holes underground, three row's slip casting steel pipes are plum blossom-shaped and arrange;
When burying slip casting steel pipe underground, with spray pump, to pack wall, whitewash, steel mesh reinforcement, together with pack wall surface-closed, is formed to gunite layer;
The 6th step, after gunite layer solidifies, adopt grouting pump to each pre-buried slip casting steel pipe successively cementing slurries, after slurries solidification-stable,--steel pipe--caved gangue composite bearing body of wall that is built into steel mesh reinforcement;
The 7th step, along with the propelling of work plane, remove successively anti-down in an opposite direction post, cap and intensive individual prop; Continue circulation above-mentioned steps, until whole gob side entry retaining completes.
The beneficial effects of the utility model:
The utility model composite bearing wall steel bar net end face and bottom surface are all squeezed in body of wall by spoil, once, the other gear in secondary lane cash device has effectively stopped a large amount of from slipping spoil of the other inbreak in inclined seam lane, reduced the lateral pressure that caved gangue causes roadside support structure, prevented that spoil from pouring in stope drift active workings and causing security incident, guaranteed that work plane normally produces; Due to when driving is prepared the coal cutting roadway of gob side entry retaining, tunnel compound roof is carried out to anchor cable, combining anchor supporting, during back production, two row's anchor poles of composite bearing body of wall top have effectively suppressed, because a side seam mining makes compound roof, serious broken phenomenon occurs, guaranteed the integrality of compound roof, improved the supporting capacity of top board, prevent from occurring top board and collapse and emit above roadside support body, to what keep roadside support structure, stablely there is important function; The utility model utilizes the other caved gangue that connects top that is accumulated in lane in addition, slip casting forms filled wall, improved the bulk strength of roadway supporting system, a large amount of support materials and filler have been saved, construction technology is simple, labour intensity reduces, and has improved the production efficiency of work plane, has improved the operating environment in stope drift active workings.
Accompanying drawing explanation
Fig. 1 is gob side entry retaining roadside support construction schematic layout pattern in the present invention;
Fig. 2 is A-A generalized section in Fig. 1;
Fig. 2 a is the partial enlarged drawing of Fig. 1;
Fig. 3 is B-B generalized section in Fig. 1;
Fig. 3 a is the partial enlarged drawing of Fig. 3;
Fig. 4 is C-C generalized section in Fig. 1;
Fig. 5 once keeps off cash device to form in the present invention
shape steel mesh reinforcement stereogram;
Fig. 6 is that in the present invention, secondary gear cash device forms " [" shape steel mesh reinforcement stereogram.
1-coal seam in figure; 2-spoil; 3-compound roof; 4-base plate; 5-hydraulic prop; 6-cap; 7-steel mesh reinforcement; 8-tight roof; 9-slip casting steel pipe; 10-pack wall; 11-clashes post; 12-stope; 13-earth anchor; 14-anchor cable; 15-gunite layer; 16-anchor pole.
The specific embodiment
Describe with reference to the accompanying drawings the technical solution of the utility model below in detail.
As can be seen from Figure 4, supporting and protection structure of the present utility model is: near goaf side be provided with concave surface towards goaf " the steel mesh reinforcement 7 of [" shape, steel mesh reinforcement 7 top planes are fixed between two row's anchor poles 16 of goaf side, steel mesh reinforcement 7 base plane are anchored in base plate 4 rocks, in steel mesh reinforcement 7, pile up the pack wall 10 that has goaf natural caving to form, there is one deck gunite layer 15 on steel mesh reinforcement 7 and pack wall 10 surfaces, in pack wall 10, be embedded with slip casting steel pipe 9 with holes, by slip casting steel pipe 9, in pack wall, be marked with cement grout, after cement grout solidifies, thereby adopting sky side--steel pipe--spoil composite bearing body of wall that is built into steel mesh reinforcement along tunnel.
The construction method of the utility model supporting and protection structure is:
The first step, as shown in Figure 1, when driving is prepared the coal cutting roadway of gob side entry retaining, tunnel compound roof is carried out to anchor cable 14, anchor pole 16 combined supportings, compound roof 3 is anchored on firm tight roof 8, prevent compound roof 3 in gob side entry retaining process across falling;
Second step, along with coal seam 1 stope is pushed ahead, at goaf side, be hung with steel mesh reinforcement 7, during suspension, first steel mesh reinforcement 7 tops are fixed on two row's anchor poles 16 of goaf side, now, steel mesh reinforcement 7 is one " " " shape, is then close to the steel mesh reinforcement intensive hydraulic prop 5 of 7 outside interlaced arrangement and with the anti-down in an opposite direction post 11 of cap 6; intensive hydraulic prop 5 and anti-down post 11 are in an opposite direction pressed in steel mesh reinforcement 7 on compound roof 3 after folding to adopting sky side, and it is double-deck forming the top shown in Fig. 5
shape steel mesh reinforcement (seeing Fig. 2, Fig. 2 a and Fig. 5); Steel mesh reinforcement 7 bottoms are fixed in base plate 4 rocks with earth anchor 13, thereby construct Yi Ci lane other gear cash device;
The 3rd step, along with stope 12 continue push ahead, goaf spoil 2 natural cavings, the spoil of inbreak along base plate 4 from slipping, and Bei Yici lane other gear cash device
shape steel mesh reinforcement blocks, and piles up until approach balkstone gradually; Then, near rib one side and apart from again setting up the intensive hydraulic prop 5 of row's interlaced arrangement and with the anti-down post 11 in an opposite direction of cap 6 in a distance of Yi Ci lane other gear cash device; Now withdraw again hydraulic prop and the anti-down post in an opposite direction of Yi Ci lane other gear cash device, make steel mesh reinforcement 7 tops of Yi Ci lane other gear cash device lose barrier effect, under the lateral forces of caved gangue, the stressed outside extruding of steel mesh reinforcement 7 is outstanding, under the restriction of the intensive hydraulic prop 5 of newly establishing, steel mesh reinforcement 7 is deformed into that " [" shape (seeing Fig. 3, Fig. 3 a and Fig. 6), forms secondary lane other gear cash device thereby construct gradually;
The 4th step, along with stope continue push ahead, above goaf immediate roof is constantly caving, the spoil landing of inbreak " in [" shape steel mesh reinforcement, is piled up gradually and contacts with coal seam compound roof 3, forming stable pack wall to secondary gear cash device;
The 5th step, in the pack wall forming, bury upper, middle and lower three rows slip casting steel pipe with holes 9, three row's slip casting steel pipes 9 underground and be plum blossom-shaped and arrange;
When burying slip casting steel pipe 9 underground, with spray pump, to pack wall, whitewash, steel mesh reinforcement 7, together with pack wall surface-closed, is formed to gunite layer;
The 6th step, after gunite layer solidifies, adopt grouting pump to each pre-buried slip casting steel pipe 9 successively cementing slurries, after slurries solidification-stable,--steel pipe--caved gangue composite bearing body of wall that is built into steel mesh reinforcement;
The 7th step, along with the propelling of work plane, remove successively anti-down in an opposite direction post 11, cap 6 and intensive hydraulic prop 5; Continue circulation above-mentioned steps, until whole gob side entry retaining completes, thereby construct out supporting and protection structure as shown in Figure 4.
Claims (1)
1. a gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct, it is characterized in that, it near goaf side be provided with concave surface towards goaf " the steel mesh reinforcement of [" shape, steel mesh reinforcement top planes is fixed between two row's anchor poles of goaf side, steel mesh reinforcement base plane is anchored in floor rock, in steel mesh reinforcement, pile up the pack wall that has goaf natural caving to form, there is one deck gunite layer on steel mesh reinforcement and pack wall surface, in pack wall, be embedded with slip casting steel pipe with holes, by slip casting steel pipe, in pack wall, be marked with cement grout, after cement grout solidifies, thereby adopting sky side--steel pipe--spoil composite bearing body of wall that is built into steel mesh reinforcement along tunnel.
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| CN201420249511.2U CN203925576U (en) | 2014-05-15 | 2014-05-15 | The gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct |
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| CN201420249511.2U CN203925576U (en) | 2014-05-15 | 2014-05-15 | The gob-side entry retaining support structure of utilizing erecting dense individual props spoil to construct |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317459A (en) * | 2015-11-19 | 2016-02-10 | 中国矿业大学(北京) | Subarea filling method used for controlling large-area falling disaster of hard roof |
| CN105569726A (en) * | 2015-12-31 | 2016-05-11 | 山东深博巷道支护技术有限公司 | Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall |
| CN108979638A (en) * | 2018-09-10 | 2018-12-11 | 四川达竹煤电(集团)有限责任公司金刚煤矿 | Coal cutting roadway wedge shape regenerates wall and the compound gob-side entry retaining method of one-leg shed beam |
-
2014
- 2014-05-15 CN CN201420249511.2U patent/CN203925576U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317459A (en) * | 2015-11-19 | 2016-02-10 | 中国矿业大学(北京) | Subarea filling method used for controlling large-area falling disaster of hard roof |
| CN105569726A (en) * | 2015-12-31 | 2016-05-11 | 山东深博巷道支护技术有限公司 | Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall |
| CN108979638A (en) * | 2018-09-10 | 2018-12-11 | 四川达竹煤电(集团)有限责任公司金刚煤矿 | Coal cutting roadway wedge shape regenerates wall and the compound gob-side entry retaining method of one-leg shed beam |
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