CN114704320B - I-shaped tray and gob-side entry retaining mining side supporting structure - Google Patents
I-shaped tray and gob-side entry retaining mining side supporting structure Download PDFInfo
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- CN114704320B CN114704320B CN202111329229.6A CN202111329229A CN114704320B CN 114704320 B CN114704320 B CN 114704320B CN 202111329229 A CN202111329229 A CN 202111329229A CN 114704320 B CN114704320 B CN 114704320B
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 53
- 238000005065 mining Methods 0.000 title abstract description 28
- 230000000903 blocking effect Effects 0.000 claims description 67
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000010878 waste rock Substances 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 25
- 229910052742 iron Inorganic materials 0.000 description 13
- 238000010276 construction Methods 0.000 description 9
- 241000283690 Bos taurus Species 0.000 description 8
- 239000004744 fabric Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- 244000309464 bull Species 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0086—Bearing plates
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to an I-shaped tray and a gob-side entry retaining mining side supporting structure, belongs to the technical field of gob-side entry retaining coal pillar-free mining, and solves the problems that an existing anchor rod tray cannot control the stability of the gob-side supporting structure, cannot effectively resist and limit the inclination or tilting of the gob-side supporting structure. The H-shaped tray comprises a tray body and a web plate, wherein the tray body is a rectangular plate, the two tray bodies are parallel to each other, and the web plate is positioned between the two tray bodies and perpendicular to the tray bodies. The I-shaped tray is used for the gob-side entry retaining and mining side supporting structure, can be cooperatively controlled with the supporting structure, and effectively resists and limits the inclination or tilting of the gob-side supporting structure, so that the gob-side entry retaining effect is remarkably improved.
Description
Technical Field
The invention relates to the technical field of gob-side entry retaining coal pillar-free mining, in particular to an I-shaped tray and a gob-side entry retaining mining side supporting structure.
Background
Most of mines in China adopt a coal pillar-retaining mode to mine, so that about 40% of coal is lost. The gob-side entry retaining is used as a coal pillar-free entry protection mode, and has the advantages of improving the coal resource extraction rate, prolonging the service life of a mine, reducing the tunneling quantity of the tunnel, being more beneficial to gas control and the like, and is increasingly focused and applied. The gob-side entry retaining can be divided into two modes of roadside filling mining and non-roadside filling mining, and can be respectively applied to a near-horizontal coal seam, a large-dip-angle coal seam and a steep-dip coal seam, and the gob-side entry retaining can be selected according to actual conditions of occurrence of the coal seam, economic capacity of a coal mine and the like.
When the roadside filling mining is adopted, a supporting structure is mainly formed by paste filling, high water filling or concrete precast block wall building and the like, which is equivalent to the reconstruction of an artificial wall similar to a coal wall at a mining side. When the goaf roof collapses, particularly a large-dip-angle coal seam or a steep-dip coal seam is encountered, the side extrusion and pushing effects are realized on the wall body, particularly the upper side of the goaf roof, the upper end of the wall body is basically in a natural roof contact state, and once the pushing force is overlarge, the conditions such as wall body tilting and dumping can occur, so that the difficulty of retaining a roadway is increased, and even the failure of retaining the roadway is caused. Therefore, there is a strong need for a simple device for field construction that can resist the upper end of the "artificial wall" and limit its tilting.
When the non-roadside filling mining is adopted, a supporting structure is mainly formed by means of gangue blocking supporting, roof cutting supporting and the like, and the method is equivalent to the fact that a gangue wall similar to a coal wall is formed on a mining side again. When the goaf roof collapses, particularly when the goaf roof encounters a high-dip coal seam or a steep coal seam, the gangue wall can directly form larger lateral pressure on the gangue blocking support structure, even the gangue blocking support structure is pushed down, the difficulty of retaining a roadway is increased, and even the roadway is failed. Therefore, there is a more urgent need for a simple device for site construction, which can resist and limit the tilting of the upper, middle and lower parts and the whole of the gangue blocking support structure.
At present, the thickness of an anchor rod tray adopted for anchoring surrounding rock of a coal mine roadway is 8-10 mm, the anchor rod tray can only be matched with an anchor rod and has a single anchoring effect, and the stability control of a mining side supporting structure cannot be carried out by using the anchor rod tray.
Disclosure of Invention
In view of the above analysis, the invention aims to provide an I-shaped tray and a gob-side entry retaining gob-side supporting structure so as to solve the problems that the existing anchor rod tray cannot control the stability of the gob-side supporting structure, cannot effectively resist and can limit the inclination or tilting of the gob-side supporting structure.
The aim of the invention is mainly realized by the following technical scheme:
the utility model provides an I-shaped tray, includes tray body and web, the tray body is rectangular shaped plate, and two tray bodies are parallel to each other, and the web is located between two tray bodies and perpendicular to tray body.
Further, through holes are also formed, and penetrate through the web plate and the two tray bodies.
Further, lock holes are further formed in the web plate, and the two lock holes penetrate through the thickness direction of the web plate and are distributed on two sides of the through hole.
Further, the length of the I-shaped tray is 300mm, the width is 200mm, and the total height is 200mm.
The gob-side supporting structure comprises the I-shaped tray according to the technical scheme.
Further, the I-shaped tray is arranged on a top plate anchor rod and a mining side wall base angle anchor rod which are arranged at the outermost side of the surrounding rock anchoring structure of the roadway, and the top plate anchor rod or the base angle anchor rod penetrates through the through hole and is fixed through a nut.
Further, the waste rock blocking device also comprises a waste rock blocking beam, wherein the waste rock blocking beam is provided with an upper cattle nose ring, a middle cattle nose ring and a lower cattle nose ring, and the waste rock blocking beam is fixed with the I-shaped tray through a lock Liang Gangsi rope.
Further, the lock Liang Gangsi rope respectively passes through the upper ox nose ring of the gangue blocking beam and the lock hole of the I-shaped tray connected with the roof anchor rod to lock the gangue blocking beam and the I-shaped tray connected with the roof anchor rod.
Further, the lock Liang Gangsi rope respectively passes through the lower ox nose ring of the gangue blocking beam and the lock hole of the I-shaped tray connected with the base angle anchor rod to lock the gangue blocking beam and the I-shaped tray connected with the base angle anchor rod.
Further, the utility model also comprises a top cutting support body which is arranged at the inner side of the I-shaped tray.
The invention can at least realize one of the following beneficial effects:
(1) The I-shaped tray is used for the gob-side entry retaining and mining side supporting structure, can be cooperatively controlled with the supporting structure, and effectively resists and limits the inclination or tilting of the gob-side supporting structure, so that the gob-side entry retaining effect is remarkably improved.
(2) According to the gob-side entry retaining mining side supporting structure, high stress born by the gangue blocking beam can be transferred to the top plate and the bottom corner of the gob-side wall by the synergistic effect of the I-shaped tray, the steel wire rope and the anchor rod, so that the gangue blocking beam is prevented from being deformed and damaged greatly, and meanwhile, the goaf is effectively isolated from the space in the roadway, so that the gob-side entry retaining effect of the large-inclination coal seam is remarkably improved, and the safety, high efficiency and economic production target requirements are met.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of an I-shaped tray according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a gob-side entry retaining side supporting structure according to an embodiment of the present invention;
FIG. 3 is a side view of a gob-side entry retaining side supporting structure according to an embodiment of the present invention;
FIG. 4 is an enlarged partial view of area a of FIG. 2;
FIG. 5 is an enlarged partial view of region b of FIG. 3;
fig. 6 is a schematic structural view of a gangue blocking beam according to an embodiment of the present invention.
Reference numerals:
the novel mining combined type mining combined pile comprises the following components of a 1-roof bolt, a 101-gasket, a 102-nut, a 2-gangue blocking beam, a 201-upper ox-nose ring, a 202-middle ox-nose ring, a 203-lower ox-nose ring, a 3-I-shaped tray, a 301-tray body, a 302-web, a 303-through hole, a 304-lock hole, a 4-lock Liang Gangsi rope, a 5-base angle bolt, a 6-gangue blocking steel wire rope, a 7-reinforcing steel bar net, an 8-sealing cloth, a 9-wire net, a 10-roof cutting support body, a 1001-hydraulic single column, a 1002-hinging beam and a 1003-iron plate;
100-top plate, 200-solid coal side, 300-mining side.
Detailed Description
The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, detachably or integrally coupled, mechanically or electrically coupled, directly coupled, or indirectly coupled via an intermediary. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.
Example 1
In one embodiment of the invention, as shown in fig. 1, an i-shaped tray is disclosed, and is used for adopting a side supporting structure along a gob-side entry retaining roadway, wherein the i-shaped tray is fixed in a roadway by using an anchor rod of a roadway surrounding rock anchoring structure and is connected with other structures of the supporting structure, and stress born by the supporting structure is transferred to a top plate and a side wall of the gob-side entry retaining roadway through the i-shaped tray, so that the stress of the supporting structure is reduced, and the stability of the supporting structure is improved.
Specifically, the i-shaped tray 3 includes a tray body 301 and a web 302, the tray body 301 is a rectangular plate, the two tray bodies 301 are parallel to each other, and the web 302 is located between the two tray bodies 301 and perpendicular to the tray bodies 301.
Further, the i-shaped tray 3 is further provided with a through hole 303, the through hole 303 penetrates through the web 302 and the two tray bodies 301, and the through hole is used for connecting anchor rods. The web 302 is further provided with lock holes 304, and the two lock holes 304 penetrate through the thickness direction of the web 301 and are distributed on two sides of the through hole 303 and are used for connecting the supporting structure, so that the supporting structure is connected with the anchor rod through the I-shaped tray, and stress born by the supporting structure can be transferred to the top plate and the mining side wall.
Preferably, the i-shaped pallet 3 is connected to the support structure by means of a wire rope.
Preferably, the dimension of the I-shaped tray 3 is 300mm in length, 200mm in width and 200mm in total height; the tray 301 is a rectangular plate 300mm×200mm×30mm, and the web 302 has dimensions 300mm (length) ×140mm (height) ×50mm (thickness).
Further, for anchors with diameters no more than 28mm, the diameter of the through hole 303 is 30mm; for anchors with a diameter exceeding 28mm, the diameter of the through hole 303=the diameter of the anchor rod+5mm, and is not larger than 40mm, so that the influence on the strength of the i-shaped tray due to the fact that the wall of the through hole 303 is too thin is avoided.
Further, the through holes 303 have a hole height of 200mm, penetrating the upper and lower tray bodies 301 and the web 302.
Further, when the diameter of the wire rope connected with the supporting mechanism is not more than 30mm, the diameter of the lock hole 304 is 60mm; when the wire rope diameter is greater than 30mm, the keyhole diameter=wire rope diameter×number of wire ropes+5mm. The locking hole 304 penetrates the web 302.
In this embodiment, the i-shaped tray 3 is mounted on the anchor rod 1, the anchor rod 1 passes through the through hole of the i-shaped tray 3, then the washer 101 and the nut 102 are mounted on the anchor rod 1, and the nut 102 is screwed, thereby fixing the i-shaped tray 3.
Further, when the i-tray 3 is installed, the web 302 runs parallel to the roadway.
Further, the installation pretightening force of the anchor rod is 100kN, the mining pneumatic wrench is required to be used for installation, the detection torque is not lower than 400 N.m, enough extrusion force on the I-shaped tray is ensured, and the stability of the I-shaped tray is maintained.
In this embodiment, the i-shaped tray 3 may be manufactured by a manufacturing mold for mass production, or may be manufactured by processing a corresponding profile.
Example 2
In one embodiment of the present invention, as shown in fig. 2 to 6, an gob-side entry retaining side supporting structure is disclosed, using the i-tray of embodiment 1.
Specifically, the supporting structure comprises a rigid supporting structure and a flexible supporting structure, the rigid supporting structure comprises a gangue blocking beam 2, an I-shaped tray 3 and an anchor rod, the flexible supporting structure comprises a gangue blocking steel wire rope 6, and the gangue blocking beam 2 and the I-shaped tray 3 are locked through a lock Liang Gangsi rope 4 and the gangue blocking steel wire rope 6.
In this embodiment, the rigid support structure and the flexible support structure are locked by the lock Liang Gangsi rope and the gangue blocking steel wire rope, so that the rigid support structure and the flexible support structure are effectively associated, and a control effect of 'hardness and softness and combination' is generated by the cooperative control action of the rigid support structure and the flexible support structure.
In this embodiment, the anchor rods include a roof anchor rod 1 and a bottom angle anchor rod 5, and when tunneling and surrounding rock anchoring are performed, the i-shaped tray 3 is installed on the roof anchor rod 1 at the outermost side and the bottom angle anchor rod 5 at the mining side, and when the i-shaped tray 3 is installed, the anchor rods pass through the through holes 303 of the i-shaped tray 3, and then the spacer 101 and the nut 102 are installed on the anchor rods, and the nut 102 is screwed, so that the i-shaped tray 3 is fixed.
In this embodiment, when the i-shaped tray 3 is installed, the length direction of the i-shaped tray 3 is parallel to the roadway direction.
In this embodiment, the gangue blocking beam 2 is formed by processing H-shaped steel, U-shaped shed legs, etc., and the gangue blocking beam 2 may be made of a whole complete section, or two sections may be lapped, and needs to be selected according to the height of the mining side, the construction difficulty, etc.
Further, the gangue stop beam 2 is provided with an upper portion Niu Bihuan, a middle cow nose ring 202 and a lower portion Niu Bihuan, wherein the upper portion Niu Bihuan, the middle cow nose ring 202 and the lower cow nose ring 203 are processed by steel bars with r=20mm and welded on the gangue stop beam 2, and preferably the diameter of the cow nose ring is 60mm.
In this embodiment, when two sections are selected for the gangue blocking beam 2 to overlap, an upper portion Niu Bihuan 201 is welded on the upper portion of one section, a middle ox nose ring 202 and a lower ox nose ring 203 are welded on the other section, the overlapping position is left, and then the two sections are bound and shaped into the Cheng Dang gangue beam 2 by using a clamping cable and the like.
The gangue blocking beam 2 is arranged on the outer side (close to the mining side 300) of the I-shaped tray 3 and is fixed through the I-shaped tray 3, the lock Liang Gangsi rope 4 and the gangue blocking steel wire rope 6. Each gangue blocking beam 2 corresponds to a set of I-shaped trays 3. Wherein, a group of I-shaped trays 3 comprises a first I-shaped tray which is positioned at the top plate 100 of the roadway and connected with the top plate anchor rod 1, and a second I-shaped tray which is positioned at the bottom of the roadway and connected with the bottom corner anchor rod 5.
Specifically, the lock Liang Gangsi rope 4 respectively passes through the upper portion Niu Bihuan of the gangue blocking beam 2 and the lock hole 304 of the first I-shaped tray corresponding to the gangue blocking beam, locks the upper portion of the gangue blocking beam 2 and the first I-shaped tray, and prevents the upper portion of the gangue blocking beam 2 from toppling over and bending and deforming greatly.
Further, the lock Liang Gangsi rope 4 respectively passes through the lower part Niu Bihuan of the gangue blocking beam 2 and the lock hole 304 of the second I-shaped tray corresponding to the gangue blocking beam, locks the lower part of the gangue blocking beam 2 and the second I-shaped tray, and prevents the lower part of the gangue blocking beam 2 from toppling over and bending and deforming greatly.
Further, the flexible supporting structure further comprises a steel wire mesh 7, a sealing cloth 8 and an iron wire mesh 9, and the construction of the flexible supporting structure is immediately carried out after the construction of the rigid supporting structure is completed. The flexible supporting structure completes construction after the construction of the rigid gangue blocking structure and before the roof near the mining side is not collapsed, so that on one hand, the gangue blocking beam can be reinforced and resistant, and the gangue blocking beam 2 is prevented from toppling over and generating larger deformation, and on the other hand, collapsed gangue, especially smaller gangue, on the mining side 300 is further prevented from entering a roadway.
Specifically, the gangue blocking steel wire rope 6 passes through the middle cow nose ring 202 of the gangue blocking beam 2 and is arranged in an X shape, and is respectively locked with the lock hole 304 of the first I-shaped tray on one side of the gangue blocking beam 2 and the lock hole 304 of the second I-shaped tray on the other side of the gangue blocking beam 2, so that three adjacent gangue blocking beams 2 are connected, and the gangue blocking steel wire rope 6 needs to be tensioned when in use.
Further, the reinforcement mesh 7, the sealing cloth 8 and the wire mesh 9 are laid from the inside of the roadway to the goaf direction. The construction sequence is as follows: firstly, paving an iron wire net 9, binding the iron wire net 9 with a top plate anchor net until the iron wire net 9 reaches the position of the anchor rod 5 at the bottom angle of the mining side wall; laying the sealing cloth 8, wherein the construction requirement is the same as that of the wire netting 9; and paving the reinforcing mesh 7 and binding the reinforcing mesh with the gangue blocking beam 2.
In this embodiment, the upper end of the gangue blocking steel wire rope 6 and the bull nose ring 201 at the upper part of the gangue blocking beam 2 are locked together on the I-shaped tray 3 of the roof bolt 1, the lower end of the gangue blocking steel wire rope 6 and the bull nose ring 203 at the lower part of the gangue blocking beam 2 are locked together on the I-shaped tray 3 of the bottom angle bolt 5, and the middle end of the steel wire rope 6 and the middle part of the gangue blocking beam 2 are associated through the bull nose ring 202 of the gangue blocking beam 2, so that the impedance effect of the rigid support structure on the gangue in the goaf and the supporting effect on the roof close to the goaf side are formed, the reinforcing impedance effect of the flexible support structure on the rigid support structure, the in-roadway-entering-preventing effect of the gangue in the roadway and the goaf-isolating effect are formed, and the stability and the adaptability of the large-dip-angle coal seam gob-side-retaining structure are remarkably improved through the synergistic effect of the effects of the functions.
Further, the support structure of the present embodiment further includes a truncated support body 10. The roof cutting support body 10 is arranged on the inner side (close to the solid coal side 200) of the I-shaped tray 3, so that the roof cutting support function is achieved, large deformation damage of a roof in a roadway is prevented, the I-shaped tray 3 is prevented from toppling over, and a certain protection function is achieved on the support structure.
The roof cutting support body comprises a hydraulic single column 1001, a hinged beam 1002 and an iron disc 1003, wherein the upper end of the hydraulic single column 1001 supports the hinged beam 1002, the lower end of the hydraulic single column 1001 is erected on the iron disc 1003, the hydraulic single column 1001 is constructed in a row along the trend of a roadway, the row spacing of the hydraulic single column 1001 is 800-1000mm, the hydraulic single column is selected according to the surrounding rock structure and the mechanical property of a top plate, and the initial pressure of the hydraulic single column is 12-18MPa.
Further, the articulated beams 1002 are arranged in rows along the roadway, are attached to the first i-shaped pallet, are supported by the hydraulic single columns 1001, and are continuously articulated.
Further, iron plates 1003 are arranged along the roadway, and each hydraulic single column 1001 is provided with one iron plate 1003. The iron plate 1003 is formed by processing an iron plate with the thickness of 30-50 mm, the cross section of the iron plate is square or round, the side length of the iron plate is 300mm when square is adopted, and the diameter of the iron plate is 300mm when round is adopted.
In this embodiment, since the top plate has an inclination angle, and the hinge beam 1002 has a tendency of moving upward on the extrusion of the hydraulic single column 1001, the hinge beam 102 compresses the i-shaped tray 3, thereby playing a role of blocking the tilting of the i-shaped tray 3, and further playing a role of blocking the tilting of the gangue blocking beam 2.
In summary, according to the i-shaped tray and the gob-side entry retaining side supporting structure provided by the embodiment of the invention, the i-shaped tray is used for the gob-side entry retaining side supporting structure and can be cooperatively controlled with the supporting structure, so that the inclination or tilting of the gob-side entry retaining structure is effectively resisted and limited, and the gob-side entry retaining effect is obviously improved; the gob-side supporting structure is adopted in gob-side entry retaining through the synergism of I-shaped tray, wire rope and stock, can shift the high stress that keeps off the gangue roof beam and bear to roof and gob-side wall, prevents that the gangue roof beam from taking place large deformation and destroying, keeps apart goaf and intra-roadway space effectively simultaneously to show the gob-side entry retaining effect of promotion high-inclination coal seam, satisfy safety, high efficiency, economic production target demand.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides an I-shaped tray which is characterized in that the I-shaped tray comprises a tray body (301) and a web plate (302), wherein the tray body (301) is a rectangular plate, the two tray bodies (301) are parallel to each other, and the web plate (302) is positioned between the two tray bodies (301) and is perpendicular to the tray bodies (301);
the device is also provided with a through hole (303), and the through hole (303) penetrates through the web plate (302) and the two tray bodies (301);
the web plate (302) is also provided with lock holes (304), and the two lock holes (304) penetrate through the thickness direction of the web plate (302) and are distributed on two sides of the through hole (303);
the I-shaped tray (3) is used for a gob-side supporting structure of gob-side entry retaining, the I-shaped tray (3) comprises a first I-shaped tray which is positioned at a roadway top plate and connected with a top plate anchor rod (1) arranged at the outermost side of a surrounding rock anchoring structure of the roadway, and a second I-shaped tray which is positioned at the bottom of the roadway and connected with a gob-side wall base angle anchor rod (5), and the top plate anchor rod (1) or the base angle anchor rod (5) passes through a through hole (303) of the I-shaped tray (3);
the supporting structure further comprises a gangue blocking beam (2), a lock Liang Gangsi rope (4) and a gangue blocking steel wire rope (6), wherein the lock Liang Gangsi rope (4) penetrates through the lock hole (304) to connect the gangue blocking beam (2) with the I-shaped tray (3);
the waste rock blocking beam (2) is provided with a middle cow nose ring (202), and the waste rock blocking steel wire rope (6) penetrates through the middle cow nose ring (202) of the waste rock blocking beam (2) and is respectively connected with a lock hole (304) of a first I-shaped tray on one side of the waste rock blocking beam (2) and a lock hole (304) of a second I-shaped tray on the other side of the waste rock blocking beam (2).
2. An i-shaped pallet according to claim 1, characterized in that the i-shaped pallet (3) has a length of 300mm, a width of 200mm and a total height of 200mm.
3. A gob-side entry retaining side supporting structure, characterized by comprising an i-shaped pallet (3) according to claim 1 or 2.
4. A gob-side entry retaining structure according to claim 3 characterised in that the gangue stop beam (2) is further provided with an upper portion Niu Bihuan (201) and a lower portion Niu Bihuan (203).
5. The gob-side entry retaining side supporting structure according to claim 4, wherein the lock Liang Gangsi rope (4) respectively passes through the upper portion Niu Bihuan (201) of the gangue blocking beam (2) and the lock hole (304) of the i-shaped tray (3) connected with the roof anchor (1), and locks the gangue blocking beam (2) and the i-shaped tray (3) connected with the roof anchor (1).
6. The gob-side entry retaining side supporting structure according to claim 4, wherein the lock Liang Gangsi rope (4) respectively passes through the lower portion Niu Bihuan (203) of the gangue blocking beam (2) and the lock hole (304) of the i-shaped tray (3) connected with the bottom angle anchor rod (5) to lock the gangue blocking beam (2) and the i-shaped tray (3) connected with the bottom angle anchor rod (5).
7. The gob-side entry retaining structure according to any one of claims 3 to 6, further comprising a roof cutting support body (10), said roof cutting support body (10) being provided inside said i-shaped tray (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329229.6A CN114704320B (en) | 2021-11-10 | 2021-11-10 | I-shaped tray and gob-side entry retaining mining side supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329229.6A CN114704320B (en) | 2021-11-10 | 2021-11-10 | I-shaped tray and gob-side entry retaining mining side supporting structure |
Publications (2)
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| CN205477640U (en) * | 2015-12-31 | 2016-08-17 | 四川达竹煤电(集团)有限责任公司小河嘴煤矿 | Safety support device to collecting space area roof cutting release |
| CN208310827U (en) * | 2018-06-08 | 2019-01-01 | 河南焦煤能源有限公司 | Gob side entry forces side column Special anchor rod pallet |
| CN110925017B (en) * | 2019-12-11 | 2021-11-09 | 西安科技大学 | Reserving and supporting method for long-wall mining special-shaped gob-side roadway in large-dip-angle medium-thickness coal seam trend |
| CN111734466B (en) * | 2020-06-29 | 2022-03-18 | 陕西煤业化工技术研究院有限责任公司 | Gob-side entry retaining roadway support system and method for three-soft coal seam coal pillar-free mining |
| CN113250715A (en) * | 2021-06-01 | 2021-08-13 | 沁和能源集团有限公司候村煤矿 | Gob-side entry retaining method for layered mining under coal mine |
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