CN114704320A - 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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- CN114704320A CN114704320A CN202111329229.6A CN202111329229A CN114704320A CN 114704320 A CN114704320 A CN 114704320A CN 202111329229 A CN202111329229 A CN 202111329229A CN 114704320 A CN114704320 A CN 114704320A
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- tray
- supporting structure
- entry retaining
- shaped
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 67
- 238000005065 mining Methods 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims description 50
- 239000010878 waste rock Substances 0.000 claims description 44
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 244000309464 bull Species 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 239000003245 coal Substances 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 229910052742 iron Inorganic materials 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 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
- 238000000605 extraction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- 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
-
- 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
-
- 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 the existing anchor rod tray cannot control the stability of the gob-side supporting structure, and cannot effectively resist and limit the inclination or toppling of the gob-side supporting structure. The I-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 is vertical to the tray bodies. The I-shaped tray is used for the gob-side entry retaining mining side supporting structure, can be cooperatively controlled with the supporting structure, effectively resists and limits inclination or toppling of the gob-side entry retaining side supporting structure, and therefore 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 mines in China are mined in a coal pillar retaining mode, and about 40% of coal loss is caused. Gob-side entry retaining is used as a coal-pillar-free entry retaining mode, and has the advantages of increasing the coal resource extraction rate, prolonging the service life of a mine, reducing the roadway excavation amount, being more beneficial to gas control and the like, and is more and more concerned and applied. The gob-side entry retaining can be divided into two modes of roadside filling mining and non-roadside filling mining, can be respectively applied to a near-horizontal coal seam, a large-inclination-angle coal seam and a steep-inclination coal seam, and needs to be selected according to actual conditions of coal seam occurrence, economic capacity of coal mines 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 reconstructing an artificial wall similar to a coal wall at a goaf side. When a goaf roof collapses, especially when a large-dip-angle coal seam or a steep-dip coal seam is encountered, lateral extrusion and pushing effects are exerted on a wall body, especially an upper wall of the goaf, the upper end of the wall body is basically in a natural roof touching state, and once the pushing force is too large, the situations of wall body inclination, dumping and the like occur, so that the difficulty of roadway retaining is increased, and even roadway retaining failure is caused. Therefore, a simple device is urgently needed for field construction, and the simple device can resist and limit the toppling of the upper end of the artificial wall.
When non-roadside filling mining is adopted, a supporting structure is mainly formed by modes of waste rock retaining supporting, roof cutting supporting and the like, which is equivalent to a 'waste rock wall' similar to a coal side is formed again on a goaf side. When the top plate of the goaf collapses, especially when meeting a large-inclination coal seam or a steep-inclination coal seam, the waste rock wall can directly form larger lateral pressure on the waste rock retaining and supporting structure, and even push down the waste rock retaining and supporting structure, so that the difficulty of roadway retention is increased, and even the roadway retention failure is caused. Therefore, a simple device which can resist and limit the toppling of the upper part, the middle part, the lower part and the whole waste rock retaining and supporting structure is more urgently needed in site construction.
At present, the stock tray that coal mine tunnel country rock anchor adopted, thickness are mostly 8 ~ 10mm, only can cooperate and play single anchor effect with the stock, can not carry out the stability control of adopting side supporting construction with it.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide an i-shaped tray and a gob-side entry retaining gob-side supporting structure to solve the problems that the existing anchor rod tray cannot perform stability control of the gob-side supporting structure, cannot effectively resist and limit inclination or toppling of the gob-side supporting structure.
The purpose of the invention is mainly realized by the following technical scheme:
the I-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 located between the two tray bodies and perpendicular to the tray bodies.
Furthermore, a through hole is further formed and penetrates through the web plate and the two tray bodies.
Furthermore, the web plate is also provided with two lock holes which penetrate through the thickness direction of the web plate and are distributed on two sides of the through hole.
Further, the drum tray has a length of 300mm, a width of 200mm, and a total height of 200 mm.
A gob-side entry retaining side supporting structure comprises the I-shaped tray in the technical scheme.
Further, the I-shaped tray is installed on a top plate anchor rod and a mining side wall bottom angle anchor rod on the outermost side of the roadway surrounding rock anchoring structure, and the top plate anchor rod or the bottom angle anchor rod penetrates through the through hole and is fixed through a nut.
Furthermore, the waste rock blocking device further comprises a waste rock blocking beam, wherein the waste rock blocking beam is provided with an upper nose ring, a middle nose ring and a lower nose ring, and the waste rock blocking beam is fixed with the I-shaped tray through a lock beam steel wire rope.
Furthermore, the steel wire rope of the lock beam respectively penetrates through the upper nose ring of the waste rock blocking beam and the lock hole of the I-shaped tray connected with the roof bolt to lock the waste rock blocking beam and the I-shaped tray connected with the roof bolt.
Furthermore, the steel wire rope of the lock beam respectively penetrates through a lower nose ring of the waste rock blocking beam and a lock hole of the I-shaped tray connected with the bottom angle anchor rod, and the waste rock blocking beam and the I-shaped tray connected with the bottom angle anchor rod are locked.
Further, the rack-top tray further comprises a top-cutting support body, and the top-cutting support body is arranged on the inner side of the I-shaped tray.
The invention can realize at least one of the following beneficial effects:
(1) the I-shaped tray is used for the gob-side entry retaining mining side supporting structure, can be cooperatively controlled with the supporting structure, effectively resists and limits inclination or toppling of the gob-side entry retaining side supporting structure, and therefore the gob-side entry retaining effect is remarkably improved.
(2) According to the gob-side entry retaining mining side supporting structure, through the synergistic effect of the I-shaped tray, the steel wire rope and the anchor rod, high stress borne by the waste rock blocking beam can be transferred to the top plate and the bottom angle of the gob-side wall, the waste rock blocking beam is prevented from being damaged due to large deformation, and meanwhile, a goaf is effectively isolated from the space in the roadway, so that the gob-side entry retaining effect of a coal seam with a large inclination angle is remarkably improved, and the requirements of safe, efficient and economic production targets are met.
In the invention, the technical schemes can be combined with each other 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 will 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, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of a I-tray according to an embodiment of the present invention;
FIG. 2 is a sectional view of a supporting structure at a side of a roadway for gob-side entry retaining according to an embodiment of the present invention;
FIG. 3 is a side view of a roadway-retaining and gob-side supporting structure according to an embodiment of the present invention;
FIG. 4 is a partial enlarged view of the area a in FIG. 2;
FIG. 5 is a partial enlarged view of the area b of FIG. 3;
FIG. 6 is a schematic structural diagram of the gangue blocking beam according to the embodiment of the invention.
Reference numerals:
1-roof bolt, 101-gasket, 102-nut, 2-waste blocking beam, 201-upper nose ring, 202-middle nose ring, 203-lower nose ring, 3-I-shaped pallet, 301-pallet body, 302-web, 303-through hole, 304-keyhole, 4-lock beam wire rope, 5-base angle bolt, 6-waste blocking wire rope, 7-steel bar net, 8-sealing cloth, 9-wire net, 10-top cutting support body, 1001-hydraulic single column, 1002-hinged beam, 1003-iron plate;
100-roof, 200-solid coal side, 300-goaf side.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediate medium. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to 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 multifunctional, regardless of their orientation in space.
Example 1
One embodiment of the invention, as shown in fig. 1, discloses an i-shaped tray used for gob-side entry retaining mining side supporting structure, 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 the stress borne by the supporting structure is transferred to a top plate and a mining side wall 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 drum tray 3 is provided with a through hole 303, and the through hole 303 penetrates through the web 302 and the two tray bodies 301, and is used for connecting an anchor rod. The web plate 302 is further provided with two locking holes 304, the two locking holes 304 penetrate through the thickness direction of the web plate 301 and are distributed on two sides of the through hole 303 to be used for connecting a supporting structure, so that the supporting structure is connected with the anchor rod through the I-shaped tray, and stress borne by the supporting structure can be transferred to the top plate and the goaf side wall.
Preferably, the i-tray 3 is connected to the supporting structure by means of a wire rope.
Preferably, the dimensions of the drum 3 are 300mm in length, 200mm in width and 200mm in total height; wherein, the tray body 301 is a rectangular plate with the size of 300mm multiplied by 200mm multiplied by 30mm, and the size of the web plate 302 is 300mm (length) multiplied by 140mm (height) multiplied by 50mm (thickness).
Further, for anchors with a diameter not exceeding 28mm, the diameter of the through hole 303 is 30 mm; for the anchor rod with the diameter exceeding 28mm, the diameter of the through hole 303 is equal to the diameter of the anchor rod +5mm and is not larger than 40mm, and the influence on the strength of the I-shaped tray due to the fact that the hole wall of the through hole 303 is too thin is avoided.
Further, the through hole 303 has a hole height of 200mm, and penetrates the upper and lower tray bodies 301 and the web 302.
Further, when the diameter of the steel wire rope connected with the supporting mechanism is not more than 30mm, the diameter of the lock hole 304 is 60 mm; when the diameter of the steel wire rope is larger than 30mm, the diameter of the lock hole is equal to the diameter of the steel wire rope multiplied by the number of the steel wire ropes +5 mm. The locking hole 304 penetrates the web 302.
In this embodiment, the drum-shaped tray 3 is mounted on the anchor bar 1, the anchor bar 1 is passed through the through hole of the drum-shaped tray 3, and then the spacer 101 and the nut 102 are fitted on the anchor bar 1, and the nut 102 is tightened, thereby fixing the drum-shaped tray 3.
Further, the web 302 runs parallel to the roadway when the drum 3 is installed.
Furthermore, the installation pretightening force of the anchor rod is 100kN, a mining pneumatic wrench is required to be used for installation, the detection torque is not lower than 400 N.m, sufficient extrusion force on the I-shaped tray is guaranteed, and the stability of the I-shaped tray is kept.
In this embodiment, the i-shaped tray 3 may be manufactured by a mold for mass production, or may be manufactured by using a corresponding profile.
Example 2
One embodiment of the present invention, as shown in fig. 2 to 6, discloses a gob-side entry retaining gob-side supporting structure using the i-shaped tray of embodiment 1.
Specifically, the supporting structure comprises a rigid supporting structure and a flexible supporting structure, the rigid supporting structure comprises a waste rock blocking beam 2, an I-shaped tray 3 and an anchor rod, the flexible supporting structure comprises a waste rock blocking steel wire rope 6, and the waste rock blocking beam 2 and the I-shaped tray 3 are locked through a lock beam steel wire rope 4 and the waste rock blocking steel wire rope 6.
In this embodiment, the rigid supporting structure and the flexible supporting structure are locked by the lock beam steel wire rope and the waste rock blocking steel wire rope, so that the rigid supporting structure and the flexible supporting structure are effectively associated, and a control effect of 'rigid and flexible coordination' is generated by a cooperative control effect of the rigid supporting structure and the flexible supporting structure.
In the embodiment, the anchor rods comprise a top plate anchor rod 1 and a bottom angle anchor rod 5, during roadway excavation and surrounding rock anchoring, an I-shaped tray 3 is installed on the top plate anchor rod 1 on the outermost side and the goaf side bottom angle anchor rod 5, during installation, the anchor rods penetrate through holes 303 of the I-shaped tray 3, then gaskets 101 and nuts 102 are installed on the anchor rods, and the nuts 102 are 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 direction of the roadway.
In this embodiment, waste rock blocking beam 2 chooses for use I-steel, H shaped steel, U type shed leg etc. to process and forms, and waste rock blocking beam 2 can adopt to be that a whole complete section bar is made, also can be that two section bars carry out the overlap joint, need select according to adopting sky side height, construction degree of difficulty etc..
Further, the waste rock blocking beam 2 is provided with an upper bull nose ring 201, a middle bull nose ring 202 and a lower bull nose ring 203, wherein the upper bull nose ring 201, the middle bull nose ring 202 and the lower bull nose ring 203 are machined and welded on the waste rock blocking beam 2 by using reinforcing steel bars with the R being 20mm, and the diameter of the bull nose ring is preferably 60 mm.
In this embodiment, when two sections are selected for the gangue-blocking beam 2 to overlap, an upper bull nose ring 201 needs to be welded on the upper portion of one of the sections, a middle bull nose ring 202 and a lower bull nose ring 203 need to be welded on the other section, and the position of the overlapping position needs to be reserved, and then the two sections are bound by a clamping cable and the like to form the gangue-blocking beam 2.
The waste rock blocking beam 2 is arranged on the outer side (close to the goaf side 300) of the I-shaped tray 3 and is fixed through the I-shaped tray 3, the lock beam steel wire rope 4 and the waste rock blocking steel wire rope 6. Each gangue stopping beam 2 corresponds to a group of I-shaped pallets 3. The set of i-shaped trays 3 comprises a first i-shaped tray connected to the roof bolting 1 at the roof 100 of the roadway and a second i-shaped tray connected to the floor bolting 5 at the bottom of the roadway.
Specifically, the lock beam steel wire rope 4 respectively penetrates through the upper nose ring 201 of the waste rock blocking beam 2 and the lock hole 304 of the first I-shaped tray corresponding to the upper nose ring, so that the upper portion of the waste rock blocking beam 2 and the first I-shaped tray are locked, and the upper portion of the waste rock blocking beam 2 is prevented from being toppled and bent to deform greatly.
Further, the steel wire rope 4 of the lock beam respectively passes through the lower nose ring 203 of the gangue blocking beam 2 and the lock hole 304 of the second I-shaped pallet corresponding to the lower nose ring, so that the lower part of the gangue blocking beam 2 and the second I-shaped pallet are locked, and the lower part of the gangue blocking beam 2 is prevented from being toppled and bent to deform greatly.
Furthermore, the flexible supporting structure also comprises a steel wire mesh 7, a sealing cloth 8 and a wire netting 9, and after the rigid supporting structure is constructed, the flexible supporting structure is constructed immediately. The flexible supporting structure completes construction after the construction of the rigid gangue blocking structure and before the top plate near the goaf side does not collapse, on one hand, the flexible supporting structure can play a role in reinforcing impedance for the gangue blocking beam, prevents the gangue blocking beam 2 from toppling and generating large deformation, and on the other hand, further prevents the collapse gangue, especially small gangue, of the goaf side 300 from being mixed into the roadway.
Specifically, the gangue stopping steel wire rope 6 penetrates through the middle nose ring 202 of the gangue stopping beam 2 and is arranged in an X shape, and the gangue stopping steel wire rope is respectively locked with the locking hole 304 of the first I-shaped pallet on one side of the gangue stopping beam 2 and the locking hole 304 of the second I-shaped pallet on the other side of the gangue stopping beam 2, so that three adjacent gangue stopping beams 2 are connected, and the gangue stopping steel wire rope 6 needs to be tensioned when being used.
Further, the reinforcing mesh 7, the sealing cloth 8, and the wire netting 9 are laid from the roadway toward the goaf. The construction sequence is as follows: laying a wire netting 9, binding the wire netting 9 and a top plate anchor net, and laying the wire netting 9 and the top plate anchor net to the mining side bottom corner anchor rod 5; then laying the sealing cloth 8, and meeting the construction requirement with the wire netting 9; and then the reinforcing mesh 7 is laid and bound with the waste rock blocking beam 2.
In the embodiment, the upper end of the waste rock blocking steel wire rope 6 and the nose ring 201 on the upper part of the waste rock blocking beam 2 are locked on the I-shaped tray 3 of the roof anchor rod 1 together, the lower end of the waste rock blocking steel wire rope 6 and the nose ring 203 on the lower part of the waste rock blocking beam 2 are locked on the I-shaped tray 3 of the bottom corner anchor rod 5 together, the middle end of the steel wire rope 6 and the middle part of the waste rock blocking beam 2 are associated through the nose ring 202 of the waste rock blocking beam 2, so that the impedance effect of a rigid supporting structure on waste rock in a goaf and the supporting effect on a roof plate close to a goaf side are formed, the reinforcing impedance effect of a flexible supporting structure on the rigid supporting structure is formed simultaneously, the effect of the waste rock entering the roadway and the isolating effect of the roadway and the goaf are prevented, and the stability and the adaptability of the gob-side roadway retaining structure of the coal seam with the large inclination angle are obviously improved through the synergistic effect of the effects.
Further, the supporting structure of the present embodiment further includes a roof cutting supporting 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, and on one hand, the roof-cutting support body plays a role in roof-cutting support to prevent a roof plate in a roadway from being largely deformed and damaged, on the other hand, the I-shaped tray 3 is prevented from toppling over, and a certain protection effect is achieved on a support structure.
The roof cutting support body comprises a hydraulic single column 1001, an articulated beam 1002 and an iron disc 1003, wherein the upper end of the hydraulic single column 1001 supports the articulated beam 1002, the lower end of the hydraulic single column is erected on the iron disc 1003 and constructed in a row along the roadway direction, the row spacing of the hydraulic single column 1001 is 800-1000mm, the roof cutting support body is selected according to the surrounding rock structure and the mechanical property of a roof, and the initial pressure of the hydraulic single column is 12-18 MPa.
Further, the hinged beams 1002 are arranged in a row along the course of the roadway, attached to the first i-shaped tray, supported by hydraulic single columns 1001, and continuously hinged.
Further, the iron plates 1003 are arranged along the roadway direction, and one iron plate 1003 is arranged on each hydraulic single column 1001. 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 circular, the side length of the iron plate is 300mm when the square is adopted, and the diameter of the iron plate is 300mm when the circular is adopted.
In this embodiment, since the top plate has an inclination angle and the hinged beam 1002 has a tendency to move upward in the squeezing of the hydraulic single column 1001, the hinged beam 102 compresses the i-shaped tray 3, so as to prevent the i-shaped tray 3 from toppling over, and further prevent the gangue blocking beam 2 from toppling over.
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, can be cooperatively controlled with the supporting structure, effectively resists and limits inclination or toppling of the gob-side entry retaining side supporting structure, and thus the gob-side entry retaining effect is remarkably improved; according to the gob-side entry retaining and mining side supporting structure, high stress borne by the waste rock blocking beam can be transferred to the top plate and the gob-side wall through the synergistic effect of the I-shaped tray, the steel wire rope and the anchor rod, the waste rock blocking beam is prevented from being deformed greatly and damaged, and meanwhile, a goaf and an in-lane space are effectively isolated, so that the gob-side entry retaining effect of a large-inclination angle coal seam is obviously improved, and the requirements of safety, high efficiency and economic production targets are met.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (10)
1. An i-shaped tray, characterized by comprising a tray body (301) and a web (302), wherein the tray body (301) is a rectangular plate, the two tray bodies (301) are parallel to each other, and the web (302) is positioned between the two tray bodies (301) and is perpendicular to the tray bodies (301).
2. Drum tray according to claim 1, characterized in that through holes (303) are provided, said through holes (303) penetrating the web (302) and the two tray bodies (301).
3. The drum of claim 2, wherein the web (302) further comprises two locking holes (304), and the two locking holes (304) penetrate through the thickness direction of the web (302) and are distributed on two sides of the through hole (303).
4. Drum according to one of claims 1 to 3, characterized in that the drum (3) has a length of 300mm, a width of 200mm and a total height of 200 mm.
5. Gob-side entry retaining side support structure comprising an i-shaped tray (3) according to claims 1 to 4.
6. Gob-side entry retaining and gob-side supporting structure according to claim 5, characterized in that said i-shaped tray (3) is mounted on the roof bolt (1) and gob-side sill anchor (5) at the outermost side of the roadway surrounding rock anchoring structure, and said roof bolt (1) or sill anchor (5) is passed through the through hole (303) of said i-shaped tray (3) and fixed by means of a nut (102).
7. The gob-side entry retaining and gob-side entry mining side supporting structure according to claim 6, further comprising a waste rock blocking beam (2), wherein the waste rock blocking beam (2) is provided with an upper bull nose ring (201), a middle bull nose ring (202) and a lower bull nose ring (203), and the waste rock blocking beam (2) is fixed with the I-shaped tray (3) through a lock beam steel wire rope (4).
8. The gob-side entry retaining and gob-side entry retaining support structure according to claim 7, wherein the lock beam wire rope (4) passes through an upper nose ring (201) of the gangue blocking beam (2) and a lock hole (304) of the h-shaped pallet (3) connected to the roof bolt (1), respectively, and locks the gangue blocking beam (2) and the h-shaped pallet (3) connected to the roof bolt (1).
9. The gob-side entry retaining and gob-side entry retaining support structure according to claim 7, wherein the lock beam wire rope (4) passes through a lower nose ring (203) of the gangue blocking beam (2) and a lock hole (304) of the i-shaped pallet (3) connected to the floor angle anchor rod (5), respectively, and locks the gangue blocking beam (2) and the i-shaped pallet (3) connected to the floor angle anchor rod (5).
10. Gob-side entry retaining and gob-side support structure according to any one of claims 6 to 9, further comprising a roof-cutting support body (10), the roof-cutting support body (10) being provided inside the drum-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 |
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| 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 |
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| CN114704320A true CN114704320A (en) | 2022-07-05 |
| CN114704320B CN114704320B (en) | 2023-05-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110925017A (en) * | 2019-12-11 | 2020-03-27 | 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 |
| CN111734466A (en) * | 2020-06-29 | 2020-10-02 | 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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2021
- 2021-11-10 CN CN202111329229.6A patent/CN114704320B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN110925017A (en) * | 2019-12-11 | 2020-03-27 | 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 |
| CN111734466A (en) * | 2020-06-29 | 2020-10-02 | 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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