CN111911196B - Non-pillar mining concrete modular roadway support structure along empty space - Google Patents
Non-pillar mining concrete modular roadway support structure along empty space Download PDFInfo
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- CN111911196B CN111911196B CN202010796782.XA CN202010796782A CN111911196B CN 111911196 B CN111911196 B CN 111911196B CN 202010796782 A CN202010796782 A CN 202010796782A CN 111911196 B CN111911196 B CN 111911196B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
Abstract
The invention discloses a non-pillar mining concrete modularized gob-side entry-forming supporting structure, belonging to the technical field of mining of mineral resources; on the basis of a flexible mold concrete gob-side entry retaining technology, a coal pillar-free mining concrete modular gob-side entry supporting structure is provided, and a concrete modular wall body consists of three parts: the system comprises an upper layer jacking unloading module, a middle wall layer module and a lower layer foundation module, wherein the jacking unloading module comprises a jacking middle concrete module, a jacking concrete module and a jacking gap concrete module, and a plurality of strip-shaped semicircular bulges and semicircular grooves are arranged on the top surface of the wall layer module to prevent the modules from sliding; the invention can realize the non-coal-pillar exploitation of the whole well field, can reduce the number of the driving tunnels and the maintenance cost of the tunnels, can recycle the modular concrete and greatly reduce the supporting production cost.
Description
Technical Field
The invention relates to a non-pillar mining concrete modular gob-side entry supporting structure, and belongs to the technical field of mining of mineral resources.
Background
At present, most coal mines are nearly exhausted, precious coal resources are not fully utilized, the theoretical resource recovery rate of each underground mining area of each mine is over 65 percent, the actual recovery rate of a coal face is maintained at a lower level, and the top coal mining is less than 80 percent; the one-time mining full height is only limited to a mine with good coal mining machinery and a medium-thickness coal seam, and the coal loss of the mine with poor equipment is more serious. A large number of security coal pillars are reserved on each coal face, and mineral resources cannot be fully utilized.
The technical scheme includes that a flexible template pump concrete gob-side entry retaining technology is successfully researched and developed by the professor Wang Xiaoli of the university of Western-An science and technology in 2002, a traditional steel template or a mechanical template is replaced by a disposable fiber flexible template, a working face support tail is followed closely before an end supporting effect disappears, a concrete continuous wall is rapidly poured in an overhaul class, a water-permeable and slurry-impermeable characteristic of the flexible template and pump pressure forced top connection are utilized, a top plate is actively supported in time, and a goaf is sealed, so that the lane is used for the next working face stoping.
The soft mold concrete gob-side entry retaining technology solves the technical problem of gob-side entry retaining under a coal mine to a certain extent, but has the problems that the fully-mechanized mining support is influenced by the support shifting, the wall body is easy to run and leak slurry, the labor intensity is high, the concrete pouring time is long, the concrete setting time is long, the wall body is not connected with the top, the working efficiency is low and the like.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a modular gob-side entry supporting structure for non-pillar mined concrete, and aims to solve the problems that the support of the existing flexible-formwork concrete gob-side entry retaining technology affects the wall body connection, is easy to run slurry and leak slurry, has high labor intensity, long concrete pouring time and concrete setting time, does not connect the top of the wall body, has low working efficiency and the like.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A kind of non-pillar mining concrete modularization becomes the roadway supporting construction along the sky, the concrete modularization wall is made up of three parts:
1) the upper layer is a top-contacting unloading module which comprises a top-contacting middle concrete module, a top-contacting concrete module and a top-contacting gap concrete module and is mainly an unloading module designed for smoothly recycling the middle module, and only the middle layer of the top-contacting unloading module is recycled and repaired;
2) the middle layer is a module wall body layer, the module wall body layer is composed of wall body layer modules, and the wall body layer modules are all recyclable modules;
3) the lower layer is a basic module which is an unrecoverable module.
The foundation module is located ground of two side edges of a fully mechanized mining roadway and is continuously arranged along two side edges of the roadway, a plurality of layers of wall layer modules are continuously arranged on the upper side of the foundation module along the edge of a goaf, the top ends of the wall layer modules are respectively arranged on two sides of the top-contacting concrete module, the middle of the top-contacting concrete module is continuously arranged along the top of the goaf, the top-contacting middle concrete module is arranged on the top of the top-contacting concrete module, and the top-contacting gap concrete module is arranged between the top-contacting concrete module and the top-contacting middle concrete module.
The basic module is of a trapezoidal structure and is provided with a deformed steel bar main rib, and a rectangular groove is formed in the trapezoidal top of the basic module.
The wall body layer module is a concrete module with a cuboid structure.
The bottom surface of the wall layer module is matched with the rectangular groove at the top of the foundation module.
The wall body layer module is characterized in that the top surface of the wall body layer module is provided with a plurality of strip-shaped semicircular bulges, the semicircular bulges are parallel to the short edges of the top surface of the wall body layer module, the bottom surface of the wall body layer module is provided with a plurality of strip-shaped semicircular grooves, the semicircular grooves are parallel to the semicircular bulges and correspond to the semicircular bulges in position, and the diameters of the semicircular bulges and the semicircular grooves are the same.
Connect a concrete module side and be equipped with U type groove, U type groove opening direction is inboard towards the tunnel.
The cross section of the concrete module in the middle of the roof-contacting is trapezoidal, the concrete module in the middle of the roof-contacting is continuously arranged on the top of the roadway, the concrete module in the middle of the roof-contacting is connected through the side face, the trapezoidal long edge of the adjacent module is reversely connected with the short edge, and the concrete module is sequentially, alternately and continuously arranged.
The cross section of the top-connected gap concrete module is triangular, and the size of the top-connected gap concrete module is determined according to the size of a gap between the top-connected middle concrete module and the top-connected concrete module.
A layer of plastic film is arranged between all the modules in an auxiliary mode, the sealing protection effect is achieved, and the lubricating effect is achieved when the modules are withdrawn.
And reserved chain lock devices are arranged at four outer corners (inner wall surface of the roadway) of the middle layer module, so that the wall bodies are connected into a whole, and the safety and stability effects are achieved.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention can realize the non-pillar mining of the whole well field, improve the recovery rate of the recovery working face and prolong the service life of the mine.
2) The invention can reduce 1 tunneling roadway for each stope face, reduce the tunneling rate of the stope roadway by more than 40 percent, and greatly relieve the mine excavation linking contradiction; the maintenance cost of the tunnel is reduced, and the investment of tunneling the tunnel is saved;
3) the invention can realize continuous mining of the working faces of all the plate areas, improve the production centralization degree, realize high yield and high efficiency of mines and fully utilize resources;
4) on the basis of the original one-time flexible formwork concrete support mode, the modular concrete can be recycled, and the support production cost is greatly reduced.
5) The invention can reduce workers on underground tunneling working faces, improve the production conditions of mines and is beneficial to improving the safe production of mines.
6) The invention improves the recovery self-healing condition of the ground mining-induced fracture and simultaneously reduces the treatment investment of ground geological disasters.
7) The invention can eliminate the concrete setting time and accelerate the circulating production progress of the working face.
Drawings
Fig. 1 is a schematic cross-sectional view of a concrete modular supporting structure according to the present invention.
Fig. 2 is a schematic view of a wall layer module structure of the concrete modular supporting structure according to the present invention.
Fig. 3 is a schematic view of a basic modular structure of the concrete modular supporting structure according to the present invention.
Fig. 4 is a schematic view of a top-contacting intermediate concrete module structure of the modular concrete supporting structure of the present invention.
Fig. 5 is a schematic view of a concrete-topped modular structure according to the present invention.
Fig. 6 is a schematic view of a top-contacting gap concrete module structure of the concrete modular supporting structure according to the present invention.
Wherein, 1 is the basic module, 2 is the wall body layer module, 3 is to connect a middle concrete module, 4 is to connect a concrete module, 5 is to connect a gap concrete module, 6 is semi-circular protruding, 7 is semi-circular recess, 8 is the rectangle recess.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
A concrete modular wall body of a coal pillar-free mining concrete modular roadway-forming supporting structure along the sky is composed of three parts:
(1) the upper layer is a top-contacting unloading module which comprises a top-contacting middle concrete module 3, a top-contacting concrete module 4 and a top-contacting gap concrete module 5, and the design size of the top-contacting middle concrete module 3 is 1100 mm; the concrete module is designed in a trapezoid shape, the strength grade of concrete is C30, the main reinforcement of the concrete module is deformed steel bar with phi 25 multiplied by 2400mm, and the frame is phi 26 multiplied by 1000 mm; the design length of the top concrete module 4 is 1200mm, the top concrete module is designed in a U-groove shape, and the concrete strength grade is C20; the cross section of the top-connected gap concrete module 5 is triangular, the concrete strength grade is C30, the reinforcing bars are made of bamboo chips, and the top connection is solid.
(2) The middle layer is a module wall body layer, the module wall body layer is composed of wall body layer modules 2, and the wall body layer modules 2 are all recyclable modules; the design size of the single wall layer module 2 is 650mm in width, 600mm in height, 1200mm in length and C30 in concrete strength grade;
(3) the lower layer is a foundation module 1, the foundation module 1 is an unrecoverable module and mainly disperses the direct acting force of a wall body and a top plate on a bottom plate and the side acting force of goaf waste rocks on the wall body, the friction resistance of the bottom plate is increased, the wall body of the module is stabilized, the foundation module 1 is designed in a parallel trapezoid shape, the design size length is 1600mm, the height is 600mm, and the width is 650 mm; the basic module 1 is provided with deformed steel bars with phi 25 multiplied by 2600mm and a frame with phi 16 multiplied by 2400 mm; the concrete strength rating was C30.
The foundation module 1 is located the ground department of full-mechanized mining work tunnel both sides limit, sets up multilayer module wall layer 2 in succession along the goaf edge on foundation module 1 upside, sets up respectively on the top of both sides module wall layer 2 and connects a concrete module 4, is provided with in succession along the goaf top and connects a middle concrete module 3 in the middle of connecting a concrete module 4, connects a concrete module 4 and is equipped with between the middle concrete module 3 that connects a concrete module 5, connects a gap concrete module 5's size according to connecting a middle concrete module 3 and the gap between the concrete module 4 that connects a concrete module 4 and confirm.
The top of the basic module 1 is provided with a rectangular groove 8, the design size of the rectangular groove 8 is 1200mm in length, 650mm in width and 50mm in depth.
The top surface of wall body layer module 2 is equipped with a plurality of strip semicircular protrusions 6, and semicircular protrusions 6 are on a parallel with 2 top surface minor faces of wall body layer module, and 2 bottom surfaces of wall body layer module are equipped with a plurality of strip semicircular grooves 7, semicircular grooves 7 are parallel with semicircular protrusions 6 and the position is corresponding, and semicircular protrusions 6 and semicircular grooves 7's quantity is 2, and the radius is 30mm, and semicircular protrusions 6 play the effect of bearing wall body coupling with semicircular grooves 7, and the stable module wall body layer forms an organic whole.
The cross section of the concrete module 3 in the middle of the roof is trapezoidal, the concrete module 3 in the middle of the roof is continuously arranged on the top of the roadway, the concrete module 3 in the middle of the roof is connected through the side face, the upper edge and the lower edge of the trapezoid of the adjacent module are reversely connected, and the trapezoid is sequentially, alternately and continuously arranged.
A layer of 2mm plastic film is arranged between all the modules in an auxiliary mode, the sealing protection effect is achieved, the lubricating effect is achieved when the modules are withdrawn, and the modules are smoothly drawn out.
The outer four corners (the wall in the tunnel) of intermediate level module is provided with reserves chain lock device for the wall body is even as an organic whole, plays safe more stable effect.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a no coal pillar mining concrete modularization becomes lane supporting construction along sky which characterized in that, concrete modularization wall body comprises upper strata, intermediate level and lower floor triplex:
1) the upper layer is a top-contacting unloading module for recovering the middle layer, and specifically comprises a top-contacting middle concrete module (3), a top-contacting concrete module (4) and a top-contacting gap concrete module (5);
2) the middle layer is a module wall body layer, the module wall body layer is composed of wall body layer modules (2), and the wall body layer modules (2) are recyclable modules;
3) the lower layer is a basic module (1), and the basic module (1) is an unrecoverable module;
the foundation module (1) is positioned on the ground at two side edges of the fully mechanized mining working roadway and is continuously arranged along the corners at two sides of the roadway, the multilayer wall layer modules (2) are continuously arranged on the upper side of the foundation module (1) along the edge of the gob, the top ends of the wall layer modules (2) at two sides are respectively provided with the top-contacting concrete module (4), the top-contacting middle concrete module (3) is continuously arranged in the middle of the top-contacting concrete modules (4) at two sides along the top of the gob, and the top-contacting gap concrete module (5) is arranged between the top-contacting concrete module (4) and the top-contacting middle concrete module (3);
the cross section of the top-connected middle concrete module (3) is trapezoidal, the top-connected middle concrete module (3) is continuously arranged on the top of a roadway, the top-connected middle concrete modules (3) are connected through the side surfaces, and the long trapezoidal edges and the short trapezoidal edges of adjacent modules are reversely connected and are sequentially, alternately and continuously arranged;
a U-shaped groove is formed in the side face of the top-contacting concrete module (4), and the opening direction of the U-shaped groove faces the inner side of the roadway;
the cross section of the top-contacting gap concrete module (5) is triangular, and the size of the top-contacting gap concrete module is determined according to the size of a gap between the top-contacting middle concrete module (3) and the top-contacting concrete module (4).
2. The modular gob-side entry support structure for non-pillar mined concrete according to claim 1, wherein the foundation module (1) is of a trapezoidal structure provided with a screw-thread steel main bar, and a rectangular groove (8) is formed at the top of the trapezoid.
3. The modular gob-side entry support construction according to claim 1, wherein said wall body modules (2) are concrete modules of rectangular parallelepiped configuration.
4. A pillars-free mined concrete modular gob-side entry support structure according to claim 3 wherein the bottom surface of the wall layer module (2) fits into a rectangular recess (8) in the top of the foundation module (1).
5. The support structure for the pillar-free mined concrete roadway according to claim 3 or 4, wherein the wall body layer module (2) is provided at the top surface with a plurality of strip-shaped semicircular protrusions (6), the semicircular protrusions (6) are parallel to the short sides of the top surface of the wall body layer module (2), the wall body layer module (2) is provided at the bottom surface with a plurality of strip-shaped semicircular grooves (7), the semicircular grooves (7) are parallel to and correspond in position to the semicircular protrusions (6), and the semicircular protrusions (6) and the semicircular grooves (7) have the same diameter.
6. The modular gob-side entry supporting construction according to claim 1 wherein a plastic film is additionally provided between all of said modules for sealing protection and lubrication when said modules are retracted.
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| CN202010796782.XA CN111911196B (en) | 2020-08-10 | 2020-08-10 | Non-pillar mining concrete modular roadway support structure along empty space |
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| CN202010796782.XA CN111911196B (en) | 2020-08-10 | 2020-08-10 | Non-pillar mining concrete modular roadway support structure along empty space |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587933A (en) * | 2012-03-26 | 2012-07-18 | 兖州煤业股份有限公司 | Gob-side entry retaining method using prefabricated walls |
| CN103883336A (en) * | 2014-04-11 | 2014-06-25 | 山东科技大学 | Adjustable gob-side entry retaining wall with initial active and later buffering support and implementing method thereof |
| CN105089680A (en) * | 2015-04-14 | 2015-11-25 | 山东科技大学 | Gob-side entry retaining light-weight high-strength concrete block wall and construction technology thereof |
| CN106703878A (en) * | 2015-11-13 | 2017-05-24 | 山东科技大学 | Novel concrete precast block self-locking solid wall |
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- 2020-08-10 CN CN202010796782.XA patent/CN111911196B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587933A (en) * | 2012-03-26 | 2012-07-18 | 兖州煤业股份有限公司 | Gob-side entry retaining method using prefabricated walls |
| CN103883336A (en) * | 2014-04-11 | 2014-06-25 | 山东科技大学 | Adjustable gob-side entry retaining wall with initial active and later buffering support and implementing method thereof |
| CN105089680A (en) * | 2015-04-14 | 2015-11-25 | 山东科技大学 | Gob-side entry retaining light-weight high-strength concrete block wall and construction technology thereof |
| CN106703878A (en) * | 2015-11-13 | 2017-05-24 | 山东科技大学 | Novel concrete precast block self-locking solid wall |
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Inventor after: Zhang Yongjun Inventor after: Meng Liyuan Inventor after: Feng Xinqing Inventor after: Zhang Pengzhen Inventor after: Ji Yonglin Inventor after: Ma Fuyang Inventor after: Qin Shaolin Inventor after: Zhao Yi Inventor after: Wang Biao Inventor after: Wu Xinsheng Inventor after: Liu Laiwang Inventor after: Li Peng Inventor before: Zhang Yongjun Inventor before: Zhao Yi Inventor before: Wang Biao Inventor before: Qin Shaolin Inventor before: Ma Fuyang Inventor before: Wu Xinsheng Inventor before: Li Peng |
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