CN103883336B - A kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting and construction method thereof - Google Patents

A kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting and construction method thereof Download PDF

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Publication number
CN103883336B
CN103883336B CN201410143537.3A CN201410143537A CN103883336B CN 103883336 B CN103883336 B CN 103883336B CN 201410143537 A CN201410143537 A CN 201410143537A CN 103883336 B CN103883336 B CN 103883336B
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block
construction
lifting
gob
saddle
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CN103883336A (en
Inventor
栾恒杰
林东才
贾传洋
林惠立
张培森
陈泽宇
王冠赵
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Abstract

The invention discloses a kind of adjustable gob side entry retaining body of wall and construction method thereof of first initiatively relief pressure supporting, complete the prefabricated of each assembly mainly through aboveground, in tunnel, the mode of building construction completes.Its wall assemblies mainly comprises the saddle of concave character type structure, the lifting back-up block of T font structure, the friction crush block of triangular structure and can contracting crush block.Gob side entry retaining body of wall of the present invention have simple and reasonable, support effect good, body of wall height adjustable, and the feature such as easy to adjust, strong adaptability; Walls primary clustering all prefabricatedly to complete aboveground, and intensity is guaranteed, reliable in quality.Its construction method is easy and simple to handle, and hydraulic prop can be relied on to realize the adjustment of body of wall position and to provide initiatively support force to help to cut off tunnel goaf side top board, and body of wall has contractibility, can play buffering and allow pressure effect; First active relief pressure support wall body after having constructed can adapt to the Changing Pattern of gob side entry retaining roof pressure.

Description

A kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting and construction method thereof
Technical field
The present invention relates to a kind of gob side entry retaining body of wall and construction method thereof, particularly relate to a kind of adjustable gob side entry retaining body of wall and construction method thereof of first initiatively relief pressure supporting, belong to technical field of mine support.
Background technology
Be an advanced production technique without coal pillar mining, it is conducive to improving coal recovery rate, also can eliminate or reduce the disaster because coal column causes simultaneously, be widely adopted in recent years.
Gob side entry retaining is the important development direction without coal pillar mining.Because gob side entry retaining has, the coal column safeguarding tunnel can be cancelled, 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, reduces the danger of bump and Gas Outburst, is conducive to the safety in production in mine; Shorten time, alleviate excavation replacement contradiction, improve the production efficiency in mine; Do not stay coal column, cancel island working face and shorten moving time, reducing the impact of concentrated stress, be conducive to preventing 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 have material impact to the advantage of gob side entry retaining.The effect that roadside support should play supporting simultaneously, cut top, isolates, needs to possess the speed of increasing resistance faster, higher Support Resistance, enough contracted amounts 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; Waste pack and work stone buttress supporting can contracting amount large, labour intensity is large, goaf air leaking is serious; The shortcomings such as concrete intensity measuring metope faces building block weight, and labor strength is high, and time of building a wall long and assistant conveyance amount is large; The integrated poured roadside packing technology grown up in recent years needs to set up a set of comparatively complicated filling system, high cost, and the problem having 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 improve support force in sinking under the top plate, thus stops further sinking and the deformation failure of top board.Intensity merely by changing body of wall resists the old rotary deformation pushed up, 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 of always pushing up is irresistible, this just requires body of wall to have contractibility and can shock absorbing load.And gob side entry retaining mode in the past also exists and stays lane speed slow, be difficult to the shortcoming of the quick propelling adapting to fully-mechanized mining working.
Chinese patent application CN102587933A discloses a kind of gob-side entry retaining method adopting precast wall body.It is prefabricated by first carrying out concrete wall chunk in side, tunnel, again prefabricated concrete wall chunk is dragged the method to roadside support position, to pass through the larger precast wall body of initial stage bearing capacity, reduce wall construction to the impact of coal-face fltting speed, and then lane speed is stayed in raising.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, mainly, adopt the drift section of precast wall body gob side entry retaining general larger, span length reaches about 5m, under the impact of work plane front lead abutment pressure, often there is larger sinking in back, this sinking becomes reclinate arc surface by making the shape of back, that is, in the vertical direction, there is larger difference in height in back height everywhere, on the other hand, back also have more anchor pole appear, this even cannot carry out causing prefabricated body of wall to sidesway operation in work plane direction is very difficult.If by reducing body of wall height, the more way relying on soft-medium to connect top, to meet body of wall to the operation of work plane direction sidesway, wall support effect cannot be avoided again to reduce the appearance of phenomenon, that is, the effect of the active support of expection can not be played.
As can be seen here, research one can improve body of wall initial stage supporting capacity, adapt to the load that overlying rock sunken caves brings, the impact energy that the disrumpent feelings revolution of overlying rock of old top sinks to bringing can be absorbed again, make body of wall no matter can adapt to strong mining influence in intensity or on being out of shape, 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 the positive effect of reality.
Summary of the invention
An object of the present invention is, provides a kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting.
The technical scheme that the present invention is adopted for achieving the above object is, the adjustable gob side entry retaining body of wall of a kind of first initiatively relief pressure 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 horizontal component on former and later two directions of described lifting back-up block T font structure is greater than the width of described saddle on former and later two directions;
Described friction crush block shape is 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 inserts 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; Often be filled with between the soffit of the horizontal component of described lifting back-up block T font structure and the top plan of described saddle between adjacent two element of construction described can contracting crush block; Described contracting crush block, the space between described lifting back-up block and described saddle, slit place all use the concrete gel material of the different intensity grades made as requested to fill, glued joint.
The technique effect that technique scheme is directly brought is, adopts aboveground prefabricated profiled mode to make prefabricated component, in construction operation process, not by 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 mutual grafting puts in place, it is highly less than the height of finally building shaping body of wall 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 horizontal component on former and later two directions of lifting back-up block T font structure is greater than the width of described saddle on former and later two directions, this technical characteristic can ensure building wall construction start before use hydraulic prop will be elevated in advance back-up block upwards jack-up until lifting back-up block top compression back, and then guarantee built by laying bricks or stones after body of wall effective support is formed to back;
And the both side surface of the hypomere of lifting back-up block vertical portion is the conical surface, and this technical characteristic and shape are combinationally using of the friction crush block of right-angled triangle, due to the pressure produced when buffering may decline from later stage back;
Can mainly contain four effects by contracting crush block, one is sealing; Two is support T-shaped block, relies on T-shaped block lower end to carry out stressed enabling capabilities separately relatively limited, can increase lifting surface area by contracting contiguous block, and whole body of wall is stressed more reasonable; Three is connection two wall body structure unit, increase the stability of whole body of wall, through often larger lateral thrust can be subject to after body of wall puts in place, make the changing of the relative positions between wall element, contracting crush block its upper and lower surface of pressure of being subject to T-shaped block can produce very large frictional force to stop the body of wall changing of the relative positions between two wall elements; Four is that 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, contracting crush block and friction crush block can serve and coordinate the effect of pressure of allowing.
As preferably, the width of horizontal component on former and later two directions of above-mentioned lifting back-up block T font structure is greater than the width 20cm of described saddle on former and later two directions respectively;
In described lifting back-up block horizontal component, pre-plugged is bundled into latticed reinforcing bar, 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 horizontal component on former and later two directions of lifting back-up block T font structure is greater than the width 20cm of described saddle on former and later two directions, the position needs that the most applicable hydraulic prop supports respectively; 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, be embedded with reinforcing bar in above-mentioned friction crush block, described reinforcing bar exposes the external surface of described friction crush block.
The technique effect that this optimal technical scheme is directly brought is, adding in friction crush block has 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 characteristic significantly can improve the friction factor of friction crush block.Can ensure later stage concrete gel material fill after the intensity of whole body of wall, and to avoid or corresponding minimizing concrete gel material condensation cure back wall amount of contraction in height, ensure that body of wall is to the support effect of back.
Adding in friction crush block has 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 characteristic significantly can improve the friction factor of friction crush block.
Two of object of the present invention is, provides a kind of construction method of the first adjustable gob side entry retaining body of wall of initiatively relief pressure supporting.
The technical scheme that the present invention is adopted for achieving the above object is, a kind of construction method of the first adjustable gob side entry retaining body of wall of initiatively relief pressure supporting, comprises the following steps:
The first step, the saddle first completing concrete material aboveground, 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, contracting crush block and other building construction materials of comprising cementitious material can be transported to respectively in tunnel, complete every preparation in building wall early stage;
Second step, use hydraulic prop will be elevated back-up block upwards jack-up until be elevated back-up block top compression back; Friction crush block is installed in above-mentioned assembly, then insert can contracting crush block;
3rd step, concrete gel material is used to carry out filling operation to above-mentioned each prefabricated component gap each other and smear construction, construction working face advances 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;
4th step, after construction working face continues to advance certain distance, then removes the forward individual prop being positioned at side, tunnel in position in good time, changes into round log pillar and support;
5th step, repeats above-mentioned steps, until the construction of whole body of wall completes.
As preferably, the mode that above-mentioned filling operation is sprayed by concrete pump completes.
Further preferably, above-mentionedly smear construction and completed by manual hand manipulation.
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, the guarantee period can form effective support to back, can not form gap between body of wall and back.
In sum, the present invention has following Advantageous Effects:
1, structure is simple, and body of wall height adjustable, transports easy to adjust, strong adaptability; And its construction operation is easy and simple to handle, after building wall has been constructed, the guarantee period can form effective support to back, gap can not be formed between body of wall and back
2, wall assemblies all adopts and makes in aboveground prefabricated profiled mode, and the intensity of individual prefabricated component is guaranteed, and reliable in quality;
3, particularly, in building wall construction, hydraulic prop can be relied on to realize the adjustment of body of wall position and to provide initiatively support force to help to cut off tunnel goaf side top board, easy and simple to handle;
4, there is certain contractibility between wall assemblies, buffering can be played and allow pressure effect;
5, first initiatively relief pressure 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 of first initiatively relief pressure supporting of the present invention;
Fig. 2 is the structural representation of the first adjustable gob side entry retaining wall body structure unit of initiatively relief pressure supporting of the present invention;
Fig. 3 is the adjustable gob side entry retaining wall construction scope of operation structural representation of first initiatively relief pressure supporting of the present invention;
Fig. 4 is the adjustable gob side entry retaining body of wall sectional structure schematic diagram of first initiatively relief pressure supporting of the present invention.
Detailed description of the invention
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, the adjustable gob side entry retaining body of wall of first initiatively relief pressure of the present invention 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 horizontal component on former and later two directions of the T font structure of lifting back-up block 2 is greater than the width of saddle 1 on former and later two directions;
Friction crush block 3 shape is right-angled triangle;
The both side surface of the hypomere of lifting back-up block 2 vertical portion is the conical surface, and the vertical portion of the T font structure of lifting back-up block 2 inserts 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, lifting back-up block 2 and two friction crush blocks 3; Often be filled with between the soffit and the top plan of described saddle 1 of the horizontal component of the T font structure of described lifting back-up block 2 between adjacent two element of construction described can contracting crush block 4; Described contracting crush block 4, the space between described lifting back-up block 2 and described saddle 1, slit place all use the concrete gel material of the different intensity grades made as requested to fill, glued joint.
One of preferred embodiment, the width of horizontal component on former and later two directions of the T font structure of above-mentioned lifting back-up block 2 is greater than the width 20cm of described saddle on former and later two directions respectively; In above-mentioned lifting back-up block 2 horizontal component, pre-plugged is bundled into latticed reinforcing bar.
Preferred embodiment two, 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, the construction method of the first adjustable gob side entry retaining body of wall of initiatively relief pressure supporting of the present invention, comprises the following steps:
The first step, the saddle 1 first completing concrete material aboveground, lifting back-up block 2, friction crush block 3 and can contracting crush block 4 pre-formed;
First saddle 1 and lifting back-up block 2 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 3, contracting crush block 4 and other building construction materials of comprising cementitious material can be transported to respectively in tunnel, complete every preparation in building wall early stage;
Second step, use hydraulic prop 7 will be elevated back-up block 3 upwards jack-up until be elevated back-up block 2 top compression back; Friction crush block 3 is installed in above-mentioned assembly, then insert can contracting crush block 4;
3rd step, concrete gel material is used to carry out filling operation to above-mentioned each prefabricated component gap each other and smear construction, construction working face advances 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;
4th step, after construction working face continues to advance certain distance, then removes the forward individual prop 7 being positioned at side, tunnel in position in good time, changes into round log pillar 8 and support;
5th step, repeats above-mentioned steps, until the construction of whole body of wall completes.
The mode that above-mentioned filling operation sprays preferably by concrete pump completes.
Above-mentioned smear construction complete preferably by manual hand manipulation.
It should be added that, the size of each block of precast wall body and concrete used and can the intensity of compression material, and the angle of brake pad and friction factor, the supporting intensity that hydraulic prop provides and removing all is determined according to the actual conditions of work plane, to meet roadside support needs for principle opportunity etc.
The part do not addressed in the present invention, adopts or uses for reference prior art realization.

Claims (7)

1. an adjustable gob side entry retaining body of wall for first initiatively relief pressure 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 horizontal component on former and later two directions of described lifting back-up block T font structure is greater than the width of described saddle on former and later two directions;
Described friction crush block shape is 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 inserts the recess of described saddle, and after sinking to putting in place, the contact surface of this conical surface and described friction crush block 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; Often be filled with between the soffit of the horizontal component of described lifting back-up block T font structure and the top plan of described saddle between adjacent two element of construction described can contracting crush block;
Described contracting crush block, the space between described lifting back-up block and described saddle, slit place all use the concrete gel material of the different intensity grades made as requested to fill, glued joint.
2. the adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting according to claim 1, it is characterized in that, the width of horizontal component on former and later two directions of described lifting back-up block T font structure is greater than the width 20cm of described saddle on former and later two directions respectively; In described lifting back-up block horizontal component, pre-plugged is bundled into latticed reinforcing bar.
3. the adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting according to claim 1, it is characterized in that, be embedded with reinforcing bar in described friction crush block, described reinforcing bar exposes the external surface of described friction crush block.
4. the adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting according to claim 1, it is characterized in that, described contracting crush block is high-foaming polyester material or fibrous concrete.
5. a construction method for the first adjustable gob side entry retaining body of wall of initiatively relief pressure supporting as claimed in claim 1, is characterized in that, comprise the following steps:
The first step, the saddle first completing concrete material aboveground, 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 assembly is transported in tunnel, and be adjusted to building wall position;
By friction crush block, contracting crush block and other building construction materials of comprising cementitious material can be transported to respectively in tunnel, complete every preparation in building wall early stage;
Second step, use hydraulic prop will be elevated back-up block upwards jack-up until be elevated back-up block top compression back; Friction crush block is installed in above-mentioned assembly, then insert can contracting crush block;
3rd step, concrete gel material is used to carry out filling operation to each prefabricated component gap each other and smear construction, construction working face advances certain distance, after above-mentioned concrete gel material condensation cure, first removes the individual prop of goaf side, changes into round log pillar and supports;
4th step, after construction working face continues to advance certain distance, then removes the forward individual prop being positioned at side, tunnel in position in good time;
5th step, repeats above-mentioned steps, until the construction of whole body of wall completes.
6. the construction method of the first adjustable gob side entry retaining body of wall of initiatively relief pressure supporting according to claim 5, it is characterized in that, the mode that described filling operation is sprayed by concrete pump completes.
7. the construction method of the adjustable gob side entry retaining body of wall of first initiatively relief pressure according to claim 5 supporting, is characterized in that, described in smear construction and completed by manual hand manipulation.
CN201410143537.3A 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 Expired - Fee Related CN103883336B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104632219B (en) * 2015-01-14 2017-03-29 中国矿业大学 The high gob-side entry retaining method of thick seam large mining

Citations (7)

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Publication number Priority date Publication date Assignee Title
US4189258A (en) * 1977-09-22 1980-02-19 Hermann Hemscheidt Maschinenfabrik Gmbh & Co. Walking mine-roof support
CN2308654Y (en) * 1997-05-06 1999-02-24 辛衍存 Inserting concrete hollow bricks
CN1413828A (en) * 2002-10-28 2003-04-30 姚书银 Lattice plate and making method and use
CN101793066A (en) * 2004-07-07 2010-08-04 汪荣勋 Building block formed wall body structure
CN102071941A (en) * 2010-11-25 2011-05-25 山东科技大学 Fully mechanized mining gob-side entry retaining-based concrete block staggered joint longitudinal stacking wall forming method
CN103132546A (en) * 2013-03-14 2013-06-05 张德涛 Precast concrete component butting structure and butting method thereof
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189258A (en) * 1977-09-22 1980-02-19 Hermann Hemscheidt Maschinenfabrik Gmbh & Co. Walking mine-roof support
CN2308654Y (en) * 1997-05-06 1999-02-24 辛衍存 Inserting concrete hollow bricks
CN1413828A (en) * 2002-10-28 2003-04-30 姚书银 Lattice plate and making method and use
CN101793066A (en) * 2004-07-07 2010-08-04 汪荣勋 Building block formed wall body structure
CN102071941A (en) * 2010-11-25 2011-05-25 山东科技大学 Fully mechanized mining gob-side entry retaining-based concrete block staggered joint longitudinal stacking wall forming method
CN103132546A (en) * 2013-03-14 2013-06-05 张德涛 Precast concrete component butting structure and butting method thereof
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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