CN103883336A - Adjustable gob-side entry retaining wall with initial active and later buffering support and implementing method thereof - Google Patents
Adjustable gob-side entry retaining wall with initial active and later buffering support and implementing method thereof Download PDFInfo
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- CN103883336A CN103883336A CN201410143537.3A CN201410143537A CN103883336A CN 103883336 A CN103883336 A CN 103883336A CN 201410143537 A CN201410143537 A CN 201410143537A CN 103883336 A CN103883336 A CN 103883336A
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Abstract
The invention discloses an adjustable gob-side entry retaining wall with initial active and later buffering support and an implementing method thereof. The adjustable gob-side entry retaining wall with initial active and later buffering support and the implementing method thereof are mainly accomplished through the mode of completing prefabricating of components above a well and conducting masonry construction in a lane. Wall components mainly comprise a bedding block of a U-shaped structure, a lifting support block of a T-shaped structure, a friction crush block of a triangular structure, and a contractible crush block. The gob-side entry retaining wall has the advantages of being simple and reasonable in structure, good in supporting effect, adjustable in wall height, convenient to adjust, and strong in a adaptability; the main components used by the wall are all prefabricated above the well, intensity is guaranteed and quality is reliable. The implementing method is simple and convenient in operation, and a single hydraulic prop can be relied on to achieve wall position adjustment and active support can be provided by the single hydraulic prop to help cut off a lane gob side top plate; the wall is contractible so that pressure buffering function can be achieved; the accomplished gob-side entry retaining wall with initial active and later buffering support can adapt to the pressure change law of the gob-side entry retaining top plate.
Description
Technical field
The present invention relates to a kind of gob side entry retaining body of wall and construction method thereof, relate in particular to adjustable gob side entry retaining body of wall and the construction method thereof of a kind of first active relief pressure supporting, belong to mine support technical field.
Background technology
Be an advanced production technique without coal pillar mining, it is conducive to improve coal recovery rate, also can eliminate or reduce the disaster causing because of coal column simultaneously, is widely adopted in recent years.
Gob side entry retaining is the important development direction without coal pillar mining.Because gob side entry retaining has, can cancel the coal column of safeguarding tunnel, improve coal resources recovery ratio, make full use of reasonable development coal resources, extend mine service-life, be conducive to Mine Sustainable Development; Bian Jue Xiang Weiliu lane, reduces tunnelling amount, reduce bump and Gas Outburst danger, be conducive to the safety in production in mine; Shorten time, alleviated digging and take over contradiction, improved the production efficiency in mine; Do not stay coal column, cancel island working face and shorten moving time, reduce the impact of concentrated stress, be conducive to prevent fire, realize mine safety production and improve the advantages such as mine technology economic benefit, and being widely used in colliery without coal pillar mining field.
Can roadside support Shi Liu lane be successfully crucial, give full play to and have material impact the advantage of gob side entry retaining.Roadside support should play supporting simultaneously, cuts top, the effect of isolation, need to possess increase faster resistance speed, higher Support Resistance, enough can contracting amount and rational economy.All there is certain drawback in traditional roadside support body, as crib protection with close standing props supporting Support Resistance is little, consumption of materials is large, seal is poor; The supporting of waste pack and work stone buttress is can contracting amount large, labour intensity is large, goaf air leaking is serious; Concrete block masonry wall faces building block weight, and labor strength is high, the shortcomings such as time length and assistant conveyance amount are large of building a wall; The integrated poured roadside packing Technology Need growing up is in recent years set up a set of comparatively complicated filling system, high cost, and there is the problem that roadside support body early strength is low, demould time is of a specified duration.In addition, one of common feature of existing gob side entry retaining mode, belongs to passive stressed exactly, progressively produces and improves support force, thereby stop further sinking and the deformation failure of top board in crushing.Resist the rotary deformation on old top by the intensity of change body of wall merely, if take hard resisting will make body of wall unstability, even pressure break or the body of wall that crushes when old top revolution load is excessive.And the revolution sinking load on old top is irresistible, this just requires body of wall to have contractibility and energy shock absorbing load.And gob side entry retaining mode in the past also exists and stays lane speed slow, the shortcoming that is difficult to the quick propelling that adapts to fully-mechanized mining working.
Chinese patent application CN102587933A discloses a kind of gob-side entry retaining method that adopts precast wall body.It is prefabricated by first carrying out concrete wall chunk in tunnel one side, again prefabricated concrete wall chunk is dragged to the method for roadside support position, to pass through the larger precast wall body of initial stage bearing capacity, reduce the impact of wall construction on coal-face fltting speed, and then improve the lane speed of staying.In the prior art, this a kind of very advanced gob-side entry retaining method of can yet be regarded as, but objectively also there is fairly obvious weak point in this method, be mainly, adopt the drift section of precast wall body gob side entry retaining generally larger, span length reaches 5m left and right, under the impact of the leading bearing pressure in work plane front, back tends to occur larger sinking, the shape that makes back is become reclinate arc surface by this sinking, that is to say, in the vertical direction, there is larger difference in height in back height everywhere, on the other hand, on back, also have more anchor pole to appear, this will cause prefabricated body of wall even cannot carry out to the operation of work plane direction sidesway is very difficult.If by reducing body of wall height, more relying on soft-medium to connect the way on top, to meet body of wall to the operation of work plane direction sidesway, cannot avoid again wall support effect to reduce the appearance of phenomenon, that is, can not play the effect of the active support of expection.
As can be seen here, research one can improve body of wall initial stage supporting capacity, adapt to the load that overlying rock sinks to moving and bring, can absorb again the impact energy that overlying rock disrumpent feelings revolution in old top sinks to bringing, make body of wall no matter on intensity is still out of shape, can adapt to strong mining influence, and wall construction and the advance of the face influence each other little, stay lane speed fast, effective gob side entry retaining roadside support has real positive effect.
Summary of the invention
One of object of the present invention is to provide a kind of first active relief to press the adjustable gob side entry retaining body of wall of supporting.
The technical scheme that the present invention adopted is for achieving the above object, a kind of first initiatively relief press the adjustable gob side entry retaining body of wall of supporting, comprise saddle, lifting back-up block, friction crush block and can contracting crush block; It is characterized in that,
Described saddle is concave character type structure;
Described lifting back-up block is T font structure, and the width of the horizontal component of described lifting back-up block T font structure in former and later two directions is greater than the width of described saddle in former and later two directions;
Described friction crush block is shaped as right-angled triangle;
The both side surface of the hypomere of described lifting back-up block vertical portion is the conical surface, and the vertical portion of described lifting back-up block T font structure is inserted the recess of described saddle, and after sinking to putting in place, the contact surface of this conical surface and described brake pad is bonded to each other;
Described adjustable gob side entry retaining body of wall is connected to form by several element of construction in the horizontal direction, and each element of construction is rectangular structure, is combined respectively by a saddle, a lifting back-up block and two friction crush blocks; Can contracting crush block described in being filled with between the soffit of horizontal component of described lifting back-up block T font structure and the top plane of described saddle between every adjacent two element of construction; Space between described contracting crush block, described lifting back-up block and described saddle, the concrete gel material that slit place is all used the different intensity grades making are as requested filled, are gluedd joint.
The technique effect that technique scheme is directly brought is, adopts aboveground prefabricated profiled mode to make prefabricated component, in construction operation process, is not subject to the restriction of small space in tunnel;
Saddle and lifting back-up block are respectively concave character type structure and T font structure, and after grafting puts in place mutually, it is highly less than the height of the body of wall of finally building moulding by laying bricks or stones, is convenient to be transported in narrow and small tunnel, and is convenient to above-mentioned connecting element to be adjusted to desired location;
The width of the horizontal component of lifting back-up block T font structure in former and later two directions is greater than the width of described saddle in former and later two directions, this technical characterictic can guarantee building wall construction to start front use hydraulic prop, and by lifting back-up block, upwards jack-up is until lifting back-up block top compresses back in advance, and then body of wall after guaranteeing to have built by laying bricks or stones forms effective support to back;
And the both side surface of the hypomere of lifting back-up block vertical portion is the conical surface, this technical characterictic and being used in combination of friction crush block that is shaped as right-angled triangle, the pressure producing may decline from later stage back due to buffering time;
Can mainly contain four effects by contracting crush block, the one, sealing; The 2nd, support T shape piece, rely on separately that under T shape piece, to bring in stressed enabling capabilities relatively limited, can increase lifting surface area by contracting contiguous block, and whole body of wall is stressed more reasonable; The 3rd, connect two wall body structure unit, increase the stability of whole body of wall, after putting in place, body of wall can be subject to larger lateral thrust through often, make the changing of the relative positions between wall element, its upper and lower surface of pressure that can contracting crush block be subject to T shape piece can produce very large frictional force and stop the body of wall changing of the relative positions between two wall elements; The 4th, buffering allows pressure effect, can contracting crush block be high-foaming polyester material, fibrous concrete etc. there is the soft-medium of toughness can compression material, can contracting crush block and friction crush block play the effect of pressing that allows that coordinates.
As preferably, the width of the horizontal component of above-mentioned lifting back-up block T font structure in former and later two directions is greater than respectively the width 20cm of described saddle in former and later two directions;
Pre-plugged is bundled into latticed reinforcing bar in described lifting back-up block horizontal component, for increasing the intensity of the horizontal component of lifting back-up block T font structure.
The technique effect that this optimal technical scheme is directly brought is, the width of the horizontal component of lifting back-up block T font structure in former and later two directions is greater than respectively the width 20cm of described saddle in former and later two directions, the position needs that the most applicable hydraulic prop supports; In lifting back-up block horizontal component, pre-plugged is bundled into latticed reinforcing bar, can increase the intensity of the horizontal component of lifting back-up block T font structure.
Further preferably, in above-mentioned friction crush block, be embedded with reinforcing bar, described reinforcing bar exposes the external surface of described friction crush block.
The technique effect that this optimal technical scheme is directly brought is to add and have reinforcing bar can improve its intensity in friction crush block; Most importantly, reinforcing bar external surface be the external surface of described friction crush block, the employing of this technical characterictic can significantly improve friction crush block friction factor.Can guarantee later stage concrete gel material fill after the intensity of whole body of wall, and avoid or corresponding minimizing concrete gel material condensation cure back wall amount of contraction in height, guarantee the support effect of body of wall to back.
In friction crush block, add and have reinforcing bar can improve its intensity; Most importantly, reinforcing bar external surface be the external surface of described friction crush block, the employing of this technical characterictic can significantly improve friction crush block friction factor.
Two of object of the present invention is to provide a kind of first active relief to press the construction method of the adjustable gob side entry retaining body of wall of supporting.
The technical scheme that the present invention adopted is for achieving the above object that a kind of first active relief is pressed the construction method of the adjustable gob side entry retaining body of wall of supporting, comprises the following steps:
The first step, first at the aboveground saddle that completes concrete material, lifting back-up block, friction crush block and can contracting crush block pre-formed;
First saddle and lifting back-up block are assembled aboveground by hanging device, and above-mentioned assembly is transported in tunnel, and be adjusted to building wall position;
By friction crush block, can contracting crush block and other building construction materials including cementitious material be transported to respectively in tunnel, complete building wall every preparation in early stage;
Second step, use hydraulic prop by lifting back-up block upwards jack-up until lifting back-up block top compress back; Friction crush block is installed in above-mentioned assembly, then insert can contracting crush block;
The 3rd step, use concrete gel material to carry out filling operation and smear construction above-mentioned each prefabricated component gap each other, construction working face advance certain distance, after above-mentioned concrete gel material condensation cure, first remove the individual prop of goaf side, change into round log pillar and support;
The 4th step, construction working face continues to advance after certain distance, then removes the forward individual prop that is positioned at tunnel one side in position in good time, changes into round log pillar and supports;
The 5th step, repeats above-mentioned steps, until the construction of whole body of wall completes.
As preferably, the mode that above-mentioned filling operation sprays by concrete pump completes.
Further preferably, above-mentioned smearing constructed by having operated manually.
The technique effect that technique scheme is directly brought is that construction operation is easy and simple to handle, after building wall has been constructed, can the guarantee period form effective support to back, can between body of wall and back, not form gap.
In sum, the present invention has following useful technique effect:
1, simple in structure, body of wall height is adjustable, transports easy to adjust, strong adaptability; And its construction operation is easy and simple to handle, after building wall has been constructed, can the guarantee period form effective support to back, can between body of wall and back, not form gap
2, body of wall assembly all adopts in aboveground prefabricated profiled mode and makes, and the intensity of individual prefabricated component is guaranteed, and reliable in quality;
3, particularly, in building wall construction, can rely on hydraulic prop to realize the adjustment of body of wall position and provide initiatively support force to help to cut off tunnel goaf side top board, easy and simple to handle;
4, between body of wall assembly, there is certain contractibility, can play the pressure effect that allows that cushions;
5, first initiatively relief presses support wall body can adapt to gob side entry retaining roof pressure Changing Pattern, and braced structures rationally, reliably.
Accompanying drawing explanation
Fig. 1 is the adjustable gob side entry retaining wall part component assembling structural representation that first active relief of the present invention is pressed supporting;
Fig. 2 is the structural representation that first active relief of the present invention is pressed the adjustable gob side entry retaining wall body structure unit of supporting;
Fig. 3 is the adjustable gob side entry retaining wall construction scope of operation structural representation that first active relief of the present invention is pressed supporting;
Fig. 4 is the adjustable gob side entry retaining body of wall sectional structure schematic diagram that first active relief of the present invention is pressed supporting.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail.
As shown in Figure 1 and Figure 2, first initiatively relief of the present invention is pressed the adjustable gob side entry retaining body of wall of supporting, comprises saddle 1, lifting back-up block 2, friction crush block 3 and can contracting crush block 4; Wherein, saddle 1 is concave character type structure;
Lifting back-up block 2 is T font structure, and the width of the horizontal component of the T font structure of lifting back-up block 2 in former and later two directions is greater than the width of saddle 1 in former and later two directions;
The both side surface of the hypomere of lifting back-up block 2 vertical portions is the conical surface, and the vertical portion of the T font structure of lifting back-up block 2 is inserted the recess of saddle 1, and after sinking to putting in place, the contact surface of this conical surface and described brake pad is bonded to each other;
Above-mentioned adjustable gob side entry retaining body of wall is connected to form by several element of construction in the horizontal direction, and each element of construction is rectangular structure, is combined respectively by a saddle 1, a lifting back-up block 2 and two friction crush blocks 3; Can contracting crush block 4 described in being filled with between the soffit of horizontal component of the T of described lifting back-up block 2 font structure and the top plane of described saddle 1 between every adjacent two element of construction; Space between described contracting crush block 4, described lifting back-up block 2 and described saddle 1, the concrete gel material that slit place is all used the different intensity grades making are as requested filled, are gluedd joint.
One of optimal way, the width of the horizontal component of the T font structure of above-mentioned lifting back-up block 2 in former and later two directions is greater than respectively the width 20cm of described saddle in former and later two directions; In above-mentioned lifting back-up block 2 horizontal components, pre-plugged is bundled into latticed reinforcing bar.
Two of optimal way, is embedded with reinforcing bar in above-mentioned friction crush block 3, and described reinforcing bar exposes the external surface of described friction crush block 3.
As shown in Figure 3 to Figure 4, first active relief of the present invention is pressed the construction method of the adjustable gob side entry retaining body of wall of supporting, comprises the following steps:
The first step, first at the aboveground saddle 1 that completes concrete material, lifting back-up block 2, friction crush block 3 and can contracting crush block 4 pre-formed;
By friction crush block 3, can contracting crush block 4 and other building construction materials including cementitious material be transported to respectively in tunnel, complete building wall every preparation in early stage;
Second step, use hydraulic prop 7 by lifting back-up block 3 upwards jack-up until lifting back-up block 2 tops compress backs; Friction crush block 3 is installed in above-mentioned assembly, then insert can contracting crush block 4;
The 3rd step, use concrete gel material to carry out filling operation and smear construction above-mentioned each prefabricated component gap each other, construction working face advance certain distance, after above-mentioned concrete gel material condensation cure, first remove the individual prop 7 of goaf side, change into round log pillar 8 and support;
The 4th step, construction working face continues to advance after certain distance, then removes the forward individual prop 7 that is positioned at tunnel one side in position in good time, changes into round log pillar 8 and supports;
The 5th step, repeats above-mentioned steps, until the construction of whole body of wall completes.
The mode that above-mentioned filling operation preferably sprays by concrete pump completes.
Above-mentionedly smear construction preferably by having operated manually.
It should be added that, the size of the each block of precast wall body and concrete used and intensity that can compression material, and the angle of brake pad and friction factor, the supporting intensity that hydraulic prop provides and remove opportunity etc. and all determine according to the actual conditions of work plane, to meet roadside support needs as principle.
The part of not addressing in the present invention, adopts or uses for reference prior art and realize.
Claims (7)
1. first initiatively relief is pressed the adjustable gob side entry retaining body of wall of supporting, comprises saddle, lifting back-up block, friction crush block and can contracting crush block; It is characterized in that,
Described saddle is concave character type structure;
Described lifting back-up block is T font structure, and the width of the horizontal component of described lifting back-up block T font structure in former and later two directions is greater than the width of described saddle in former and later two directions;
Described friction crush block is shaped as right-angled triangle;
The both side surface of the hypomere of described lifting back-up block vertical portion is the conical surface, and the vertical portion of described lifting back-up block T font structure is inserted the recess of described saddle, and after sinking to putting in place, the contact surface of this conical surface and described brake pad is bonded to each other;
Described adjustable gob side entry retaining body of wall is connected to form by several element of construction in the horizontal direction, and each element of construction is rectangular structure, is combined respectively by a saddle, a lifting back-up block and two friction crush blocks; Can contracting crush block described in being filled with between the soffit of horizontal component of described lifting back-up block T font structure and the top plane of described saddle between every adjacent two element of construction; Space between described contracting crush block, described lifting back-up block and described saddle, the concrete gel material that slit place is all used the different intensity grades making are as requested filled, are gluedd joint.
2. first active relief according to claim 2 is pressed the adjustable gob side entry retaining body of wall of supporting, it is characterized in that, the width of the horizontal component of described lifting back-up block T font structure in former and later two directions is greater than respectively the width 20cm of described saddle in former and later two directions; In described lifting back-up block horizontal component, pre-plugged is bundled into latticed reinforcing bar.
3. first active relief according to claim 1 is pressed the adjustable gob side entry retaining body of wall of supporting, it is characterized in that, in described friction crush block, be embedded with reinforcing bar, described reinforcing bar exposes the external surface of described friction crush block.
4. first initiatively relief according to claim 1 is pressed the adjustable gob side entry retaining body of wall of supporting, it is characterized in that, described contracting contiguous block is the soft-medium retractable material that high-foaming polyester material, fibrous concrete and other have toughness.
5. first active relief claimed in claim 1 is pressed a construction method for the adjustable gob side entry retaining body of wall of supporting, comprises the following steps:
The first step, first at the aboveground saddle that completes concrete material, lifting back-up block, friction crush block and can contracting crush block pre-formed;
First saddle and lifting back-up block are assembled aboveground by hanging device, and above-mentioned assembly is transported in tunnel, and be adjusted to building wall position;
By friction crush block, can contracting crush block and other building construction materials including cementitious material be transported to respectively in tunnel, complete building wall every preparation in early stage;
Second step, use hydraulic prop by lifting back-up block upwards jack-up until lifting back-up block top compress back; Friction crush block is installed in above-mentioned assembly, then insert can contracting crush block;
The 3rd step, use concrete gel material to carry out filling operation and smear construction above-mentioned each prefabricated component gap each other, construction working face advance certain distance, after above-mentioned concrete gel material condensation cure, first remove the individual prop of goaf side, change into round log pillar and support;
The 4th step, construction working face continues to advance after certain distance, then removes the forward individual prop that is positioned at tunnel one side in position in good time;
The 5th step, repeats above-mentioned steps, until the construction of whole body of wall completes.
6. first active relief according to claim 4 is pressed the construction method of the adjustable gob side entry retaining body of wall of supporting, it is characterized in that, the mode that described filling operation sprays by concrete pump completes.
7. first initiatively relief according to claim 4 is pressed the construction method of the adjustable gob side entry retaining body of wall of supporting, it is characterized in that, described in smear construction by having operated manually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143537.3A CN103883336B (en) | 2014-04-11 | 2014-04-11 | A kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143537.3A CN103883336B (en) | 2014-04-11 | 2014-04-11 | A kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting and construction method thereof |
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| CN103883336A true CN103883336A (en) | 2014-06-25 |
| CN103883336B CN103883336B (en) | 2016-03-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016112772A1 (en) * | 2015-01-14 | 2016-07-21 | 中国矿业大学 | Thick coal seam large seam height gob-side retained passageway method |
| CN111911196A (en) * | 2020-08-10 | 2020-11-10 | 山西煤炭运销集团晋城有限公司 | Non-pillar mining concrete modular roadway support structure along empty space |
| CN113550763A (en) * | 2021-08-24 | 2021-10-26 | 西安科技大学 | Support structure for quickly constructing gob-side entry retaining and construction method thereof |
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| CN203925530U (en) * | 2014-04-11 | 2014-11-05 | 山东科技大学 | A kind of first active relief is pressed the adjustable gob side entry retaining body of wall of supporting |
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| US4189258A (en) * | 1977-09-22 | 1980-02-19 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co. | Walking mine-roof support |
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| WO2016112772A1 (en) * | 2015-01-14 | 2016-07-21 | 中国矿业大学 | Thick coal seam large seam height gob-side retained passageway method |
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| CN111911196B (en) * | 2020-08-10 | 2022-03-15 | 山西煤炭运销集团晋城有限公司 | Non-pillar mining concrete modular roadway support structure along empty space |
| CN113550763A (en) * | 2021-08-24 | 2021-10-26 | 西安科技大学 | Support structure for quickly constructing gob-side entry retaining and construction method thereof |
| CN113550763B (en) * | 2021-08-24 | 2023-05-02 | 西安科技大学 | Supporting structure for quickly constructing gob-side entry retaining and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN103883336B (en) | 2016-03-16 |
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