Gangue blocking hydraulic prop for gob-side entry retaining

Abstract

The utility model relates to the technical field of coal mine hydraulic prop supporting, in particular to a waste rock blocking hydraulic prop for gob-side entry retaining, which comprises a gate-type support and a waste rock blocking device, and the lower surfaces of the left end and the right end of a top beam in the gate-type support are vertically fixed at the top of a single hydraulic prop respectively; the waste rock blocking device comprises an upper sliding plate and a lower supporting baffle, the lower supporting baffle is fixed to the outer side of the bottom of one single hydraulic prop, the width and the thickness of the upper sliding plate are slightly smaller than those of the lower supporting baffle, the lower supporting baffle is of a cavity structure with an opening in the upper portion, and the upper sliding plate can slide up and down in a cavity of the lower supporting baffle.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic prop support for coal mines, in particular to a hydraulic prop for retaining gangue along gob. Background Art

[0002] Gob-side lane retention is a coal pillar-free mining process, which is to build a lane support body at the edge of the goaf behind the working face, retain the transport chute or return air chute of the previous working face, and use it as the return air chute or transport chute of the next working face, so as to maximize the recycling of resources, reduce the loss of section protection coal pillars, and effectively reduce the amount of tunnel excavation. However, the existing gob-side lane retention support mainly adopts gantry support, which does not support the goaf gangue near the goaf side, causing the gangue on one side of the goaf to easily slide into the gob-side lane, thus affecting the safe production. Utility Model Content

[0003] In order to solve the technical problem that the gangue on one side of the goaf of the existing gantry support for retaining goafs is easy to slide into the goaf-side tunnel, the utility model proposes a gangue-blocking hydraulic support for retaining goafs, comprising a gantry support and a gangue-blocking device, the gantry support comprising a top beam and a single hydraulic support, the left and right ends of the top beam are respectively vertically fixed at the top of the single hydraulic support; the gangue-blocking device comprises an upper sliding plate and a lower supporting baffle, the lower supporting baffle is fixed to the outer side of the bottom of one of the single hydraulic supports, the width and thickness of the upper sliding plate are slightly smaller than the lower supporting baffle, the lower supporting baffle is a cavity structure with an upper opening, and the upper sliding plate can slide up and down in the cavity of the lower supporting baffle.

[0004] Preferably, the single hydraulic support comprises an upper hydraulic support column, a middle hydraulic support column and a lower hydraulic support column which are sequentially connected from top to bottom, the upper hydraulic support column can be extended and retracted relative to the middle hydraulic support column, and the middle hydraulic support column can be extended and retracted relative to the lower hydraulic support column.

[0005] Preferably, the single hydraulic support comprises, from top to bottom, an upper hydraulic support column and a lower hydraulic support column, and the upper hydraulic support column can be telescopic relative to the lower hydraulic support column.

[0006] Preferably, the bottom of the single hydraulic prop is connected to the base via a connecting block.

[0007] Preferably, the plane cross-sectional area of ​​the base is larger than the plane cross-sectional area of ​​the lower column of the hydraulic support.

[0008] Preferably, the rock retaining device is symmetrically arranged on the outer side of the bottom of the single hydraulic prop in the width direction.

[0009] Preferably, the lower support baffle is fixedly connected to the lower column of the hydraulic support through a connecting block in the middle part in the width direction, and the connection includes two L-shaped connecting blocks, one L-shaped connecting block is fixedly connected to the single hydraulic support with an opening facing upward, and the other L-shaped connecting block is fixedly connected to the lower support baffle with an opening facing downward.

[0010] Preferably, the width of the lower support baffle is the spacing between adjacent single hydraulic props arranged axially along the empty tunnel.

[0011] Preferably, the size of the upper opening of the lower supporting baffle is the same as the planar cross-sectional area of ​​the upper sliding plate.

[0012] Preferably, a top block and a bottom block having a planar cross-sectional area larger than the planar cross-sectional area of ​​the upper sliding plate are respectively fixed to the top and the bottom of the upper sliding plate.

[0013] Preferably, the bottom block is sealingly and slidingly connected to the inner wall of the lower support baffle cavity, a sealed cavity is formed at the lower part of the lower support baffle cavity, and a hydraulic oil port is arranged at the bottom of the lower support baffle cavity.

[0014] Preferably, a plurality of hydraulic struts are directly disposed on the bottom block and the bottom surface of the lower support baffle cavity, and the upper sliding plate is made to slide up and down in the cavity of the lower support baffle by controlling the hydraulic struts.

[0015] Preferably, it also includes an upper support block and / or a lower support block, wherein the upper support block is arranged between the upper column of the hydraulic support and the upper sliding plate when the upper column of the hydraulic support is extended, and the lower support block is arranged between the middle column of the hydraulic support and the upper sliding plate when the middle column of the hydraulic support is extended.

[0016] Preferably, the upper support block is close to the upper column of the hydraulic support, the side of the lower support block close to the middle column of the hydraulic support is arc-shaped, and the side facing away from the arc is a planar structure.

[0017] The utility model provides a hydraulic support for retaining rock along the gob, which has the following beneficial effects:

[0018] (1) With the cooperation of the side rock retaining device and the roof, protection can be achieved in multiple directions along the goaf, effectively preventing the gangue falling across the goaf from causing damage to the working face and personnel.

[0019] (2) The side rock retaining device is divided into two upper and lower baffles, which are highly flexible and can be lowered when the hydraulic support is lowered. It is more convenient than a whole baffle.

[0020] (3) The rock retaining device and the hydraulic support are connected in blocks by L-shaped connections, which makes the rock retaining device detachable, greatly reduces the difficulty of transportation, and can be applied to tunnels in various situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of the overall structure of the utility model (when the rock blocking device is extended);

[0022] Figure 2 This is a side view of the overall structure of the utility model (when the rock blocking device is extended);

[0023] Figure 3 This is a front view of the overall structure of the utility model (when the rock blocking device is retracted);

[0024] Figure 4 This is a schematic diagram of the support block structure of the utility model;

[0025] In the figure: 1-hydraulic support upper column, 2-hydraulic support middle column, 3-hydraulic support lower column, 4-connecting block, 5-hydraulic support base, 6-top beam, 7-upper support block, 8-lower support block, 9-upper sliding plate, 10-lower support baffle, 11-connecting block, 12-top block, 13-bottom block, 14-hydraulic oil port. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] like Figure 1-4 As shown, a rock-blocking hydraulic prop for retaining lanes along the gob includes a gantry support and a rock-blocking device. The gantry support includes a top beam 6 and a single hydraulic prop. A single hydraulic prop is vertically fixed below the left and right ends of the top beam 6. In this embodiment, the single hydraulic prop adopts a three-section structure, that is, the single hydraulic prop includes a hydraulic prop upper column 1, a hydraulic prop middle column 2, and a hydraulic prop lower column 3 connected in sequence from top to bottom. The hydraulic prop upper column 1 can be extended and retracted relative to the hydraulic prop middle column 2, and the hydraulic prop middle column 2 can be extended and retracted relative to the hydraulic prop lower column 3; the top of the single hydraulic prop is fixedly connected to the lower part of the left or right end of the top beam 6, and the bottom of the single hydraulic prop is connected to the base 5 through a connecting block, wherein the plane cross-sectional area of ​​the base 5 is larger than the plane cross-sectional area of ​​the hydraulic prop lower column 3. Regarding the single hydraulic prop, those skilled in the art can also select a two-section structure according to needs, that is, the single hydraulic prop includes a hydraulic prop upper column 1 and a hydraulic prop lower column 3 in sequence from top to bottom; the single hydraulic prop is a support device well known in the art and will not be described in detail here.

[0028] The rock-blocking device is fixed to the outer side of the hydraulic support lower column 3 of one of the single hydraulic supports, and the rock-blocking device is preferably symmetrically arranged on the outer side of the hydraulic support lower column 3 of the single hydraulic support in the width direction; the rock-blocking device includes an upper sliding plate 9 and a lower supporting baffle 10, wherein the lower supporting baffle 10 is fixedly connected to the hydraulic support lower column 3 through a connecting block 11 in the middle of the width direction, and the connecting block 11 includes two L-shaped connecting blocks, one L-shaped connecting block is fixedly connected to the single hydraulic support with an opening facing upward, and the other L-shaped connecting block is fixedly connected to the lower supporting baffle 10 with an opening facing downward, and the L-shaped connecting block on the supporting baffle 10 can be buckled on the L-shaped connecting block on the single hydraulic support; the width of the lower supporting baffle 10 is the spacing between adjacent single hydraulic supports arranged axially along the empty tunnel, and the width (front-to-back direction) and thickness (left-to-right direction) of the upper sliding plate 9 are slightly smaller than the lower supporting baffle 10, and the lower supporting baffle 10 is A cavity structure with an upper opening, the size of the upper opening of the lower support baffle 10 is the same as the planar cross-sectional area of ​​the upper sliding plate 9; the upper sliding plate 9 can slide up and down in the cavity of the lower support baffle 10; the top and bottom of the upper sliding plate 9 are respectively fixed with a top block 12 and a bottom block 13 whose planar cross-sectional areas are larger than the planar cross-sectional areas of the upper sliding plate 9, the top block 12 can prevent the upper sliding plate 9 from completely entering the cavity of the lower support baffle 10, and the bottom block 13 can prevent the upper sliding plate 9 from escaping from the cavity of the lower support baffle 10; the way in which the upper sliding plate 9 slides up and down in the cavity of the lower support baffle 10 can be: the bottom block 13 is sealingly and slidably connected to the inner wall of the cavity of the lower support baffle 10, a sealed cavity is formed in the lower part of the cavity of the lower support baffle 10, a hydraulic oil port 14 is set at the bottom of the cavity of the lower support baffle 10, and the upper sliding plate 9 is controlled to slide up and down in the cavity of the lower support baffle 10 by injecting or extracting hydraulic oil therein. The upper sliding plate 9 can also slide up and down in the cavity of the lower supporting baffle 10 in the following manner: a plurality of hydraulic struts are directly arranged between the bottom block 13 and the bottom surface of the cavity of the lower supporting baffle 10, and the upper sliding plate 9 can slide up and down in the cavity of the lower supporting baffle 10 by controlling the opening of the hydraulic struts.

[0029] It also includes an upper support block 7 and a lower support block 8. The upper support block 7 is arranged between the upper column 1 of the hydraulic support and the upper sliding plate 9 when the upper column 1 of the hydraulic support is extended, and the lower support block 8 is arranged between the middle column 2 of the hydraulic support and the upper sliding plate 9 when the middle column 2 of the hydraulic support is extended; the upper support block 7 is close to the upper column 1 of the hydraulic support, and the side of the lower support block 8 close to the middle column 2 of the hydraulic support is arc-shaped, and the side facing away from the arc is a planar structure.

[0030] The utility model is used in the following manner: a rock-blocking hydraulic support of the utility model is arranged at intervals of about 1.5m along the axial direction of the goaf tunnel, wherein the rock-blocking device is arranged on one side of the goaf, controls the upper sliding plate 9 to extend out of the lower supporting baffle 10, and facilitates the upper supporting block 7 to be supported between the upper column 1 of the hydraulic support and the upper sliding plate 9, facilitates the lower supporting block 8 to be arranged between the middle column 2 of the hydraulic support and the upper sliding plate 9, the upper sliding plate 9 and the supporting baffle 10 block the rock on the goaf side, prevent the rock on the goaf side from bursting into or sliding into the goaf tunnel, the rock on the goaf side squeezes the upper sliding plate 9 to a certain extent, and the upper supporting block 7 and the lower supporting block 8 play a supporting role.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic support for retaining rock along gob, characterized in that: It includes a portal support and a rock-blocking device. The portal support includes a top beam and a single hydraulic support. The left and right ends of the top beam are respectively vertically fixed to the top of the single hydraulic support. The rock-blocking device includes an upper sliding plate and a lower supporting baffle. The lower supporting baffle is fixed to the outer side of the bottom of one of the single hydraulic supports. The width and thickness of the upper sliding plate are both smaller than the lower supporting baffle. The lower supporting baffle is a cavity structure with an upper opening. The upper sliding plate can slide up and down in the cavity of the lower supporting baffle.

2. The rock retaining hydraulic prop according to claim 1, characterized in that: The single hydraulic support comprises an upper hydraulic support column, a middle hydraulic support column and a lower hydraulic support column which are sequentially connected from top to bottom, the upper hydraulic support column can be extended and retracted relative to the middle hydraulic support column, and the middle hydraulic support column can be extended and retracted relative to the lower hydraulic support column; Alternatively, the single hydraulic support comprises, from top to bottom, an upper hydraulic support column and a lower hydraulic support column, and the upper hydraulic support column can be telescopic relative to the lower hydraulic support column.

3. The rock retaining hydraulic prop according to claim 1 or 2, characterized in that: The bottom of the single hydraulic prop is connected to the base through a connecting block, and the plane cross-sectional area of ​​the base is larger than the plane cross-sectional area of ​​the lower column of the hydraulic prop.

4. The rock retaining hydraulic prop according to claim 1, characterized in that: The rock retaining device is symmetrically arranged on the outside of the bottom of the single hydraulic prop in the width direction, and / or the width of the lower support baffle is the spacing between adjacent single hydraulic props arranged axially along the empty tunnel.

5. The rock retaining hydraulic prop according to claim 1 or 4, characterized in that: The lower support baffle is fixedly connected to the lower column of the hydraulic support through a connecting block in the middle of the width direction, and the connection includes two L-shaped connecting blocks, one L-shaped connecting block is fixedly connected to the single hydraulic support with an opening facing upward, and the other L-shaped connecting block is fixedly connected to the lower support baffle with an opening facing downward.

6. The rock retaining hydraulic prop according to claim 1, characterized in that: The size of the upper opening of the lower support baffle is the same as the planar cross-sectional area of ​​the upper sliding plate, and / or the top and bottom of the upper sliding plate are respectively fixed with a top block and a bottom block whose planar cross-sectional area is larger than that of the upper sliding plate.

7. The rock retaining hydraulic prop according to claim 6, characterized in that: The bottom block is sealingly and slidably connected with the inner wall of the lower support baffle cavity, a sealed cavity is formed at the lower part of the lower support baffle cavity, and a hydraulic oil port is arranged at the bottom of the lower support baffle cavity.

8. The rock retaining hydraulic prop according to claim 6, characterized in that: A plurality of hydraulic struts are directly arranged on the bottom surface of the bottom block and the bottom surface of the cavity of the lower supporting baffle plate, and the upper sliding plate can slide up and down in the cavity of the lower supporting baffle plate by controlling the opening of the hydraulic struts.

9. The rock retaining hydraulic prop according to claim 2, characterized in that: It also includes an upper support block and / or a lower support block. The upper support block is arranged between the upper column of the hydraulic support and the upper sliding plate when the upper column of the hydraulic support is extended, and the lower support block is arranged between the middle column of the hydraulic support and the upper sliding plate when the middle column of the hydraulic support is extended.

10. The rock retaining hydraulic prop according to claim 9, characterized in that: The upper support block is close to the upper column of the hydraulic support, the side of the lower support block close to the middle column of the hydraulic support is arc-shaped, and the side facing away from the arc-shaped is a plane structure.

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