A combined support device for preventing impact and ground pressure in a coal mine tunnel

Abstract

The application discloses a kind of coal mine roadway anti-impact ground pressure combined supporting equipment, including anchor net, supporting plate, buffer adjustment component, stand and connecting anchor rod, wherein the anchor net is fixed in the top of roadway by multiple connecting anchor rods, the lower end of the anchor net is provided with supporting plate, the lower end of the supporting plate is fixed with the side plate, the stand is oppositely set in the two sides of the roadway, the upper end of the stand is provided with crossbeam, the upper end of the crossbeam is fixed with arc-shaped frame, the arc-shaped frame is provided with mounting guide slot, multiple buffer adjustment components are installed in the mounting guide slot, the buffer adjustment component is rotatably connected with the connecting anchor rod, and the supporting direction can be adjusted; wherein the side plate, stand, crossbeam and arc-shaped frame are evenly spaced and arranged with multiple groups along the extension direction of roadway.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of roadway supporting equipment, in particular to a coal mine roadway anti-impact ground pressure combined supporting equipment. BACKGROUND

[0002] Impact ground pressure is a sudden failure phenomenon occurring in underground mining deep or tunnel structures with high tectonic stress.

[0003] The existing supporting equipment in China usually adopts local blasting method to reduce the stress concentration phenomenon of the roadway roof. When in the impact ground pressure prone area, with the increase of local blasting times, the downward movement of the rock mass may cause the buffering effect of the supporting equipment to gradually fail, resulting in the vibration energy generated by the blasting being directly absorbed by the supporting equipment when subsequent local blasting is used for stress release, which may cause damage to the supporting equipment and safety accidents.

[0004] Therefore, it is necessary to provide a coal mine roadway anti-impact ground pressure combined supporting equipment to solve the problems mentioned in the background. SUMMARY

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a coal mine roadway anti-impact ground pressure combined supporting equipment, comprising: an anchor net, a supporting plate, a buffer adjusting assembly, a stand column and a connecting anchor rod, wherein the anchor net is fixedly arranged on the top of the roadway through a plurality of connecting anchor rods, the lower end of the anchor net is provided with a supporting plate, the lower end of the supporting plate is fixedly provided with a side plate, the stand columns are oppositely arranged on both sides of the roadway, the upper end of the stand column is provided with a cross beam, the upper end of the cross beam is fixedly provided with an arc-shaped frame, the arc-shaped frame is provided with a mounting guide groove, a plurality of buffer adjusting assemblies are mounted in the mounting guide groove, and the buffer adjusting assembly and the connecting anchor rod are arranged in a shaft hole rotating connection mode, so as to adjust the supporting direction.

[0006] Among them, the side plate, the stand column, the cross beam and the arc-shaped frame are uniformly and interval arranged with multiple groups along the extension direction of the roadway.

[0007] As a preferred technical scheme of the present application, each buffer adjusting assembly comprises:

[0008] a main plate, which is an arc-shaped structure, two groups of arc-shaped grooves are symmetrically and longitudinally arranged in the main plate, and a light hole is arranged in the middle of the main plate;

[0009] a sub-plate, which is arranged in two groups and located at both ends of the extension direction of the main plate, the sub-plate is provided with a fixed arm at both ends of the side close to the main plate, a limiting shaft is rotatably arranged between the end portions of the extending end of the fixed arm, and the limiting shaft is slidably arranged in the arc-shaped groove.

[0010] Elastic support rods, one end of which is hinged to the lower end of each of the auxiliary plates; and

[0011] A balance plate is located directly below the main plate, a square hole is provided in the upper end of the balance plate, and the other end of each of the elastic support rods is hinged to the two sides of the upper end of the balance plate.

[0012] Each of the auxiliary plates is provided with a pressure sensing unit.

[0013] As a preferred technical solution of the present application, an adjusting rod is provided in the square hole, the adjusting rod is provided with threads in the middle and lower parts, the upper part of the adjusting rod is inserted and connected with the connecting anchor rod through the light hole, a support seat is screwed on the adjusting rod, a support spring is sleeved on the adjusting rod, the support spring is elastically supported between the support seat and the main plate, and a distance sensor is provided on the support spring.

[0014] As a preferred technical solution of the present application, a mounting seat is provided below the balance plate, the mounting seat is fixedly installed in the mounting guide groove, a hydraulic cylinder is hinged to the upper end of the mounting seat on the two sides corresponding to the auxiliary plates, and the other end of the hydraulic cylinder is hinged to the lower end of the balance plate.

[0015] As a preferred technical solution of the present application, the outer two ends of the support seat are rotatably provided with one end of a short shaft on the two sides perpendicular to the extension direction of the main plate, and the other end of the short shaft is rotatably arranged on the inner side of the balance plate.

[0016] As a preferred technical solution of the present application, a butt joint is provided at the lower end of the adjusting rod, a driving device is connected to the butt joint, and the driving device is fixedly arranged at the lower end of the arc-shaped frame.

[0017] As a preferred technical solution of the present application, a flexible layer is adhered to the upper end of the main plate and the auxiliary plate.

[0018] Compared with the prior art, the present application provides a coal mine roadway anti-impact ground pressure combined support device, which has the following beneficial effects:

[0019] In the present application, multiple buffer adjusting assemblies are arranged to uniformly support or locally and centrally support the roadway, thereby improving the supporting effect, and the mounting seat and the adjusting rod are arranged to recover and adjust the buffer capacity of the support spring, so that the device can always effectively buffer and support, and the main plate and the auxiliary plate are arranged to adjust the supporting range and strength of the buffer adjusting assembly, thereby improving the adaptability, and the adjusting rod and the anchor rod are inserted and rotatably arranged, the pressure difference between the two auxiliary plates is monitored, the support force of the two auxiliary plates is adjusted, the risk of impact fracture of the anchor rod due to shear force is reduced, and the service life of the anchor rod is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a kind of coal mine roadway anti-impact ground pressure combined supporting equipment overall structure schematic diagram;

[0021] Fig. 2 It is a kind of coal mine roadway anti-impact ground pressure combined supporting equipment buffer adjusting assembly structure schematic diagram;

[0022] In the figure: 1, anchor net;2, supporting plate;3, side plate;4, stand;5, crossbeam;6, arc frame;7, buffer adjusting assembly;71, main plate;72, vice plate;73, adjusting rod;74, mounting seat;75, support seat;76, balance plate;77, supporting spring;78, elastic support rod;79, hydraulic cylinder;710, butt joint;8, driving device;9, connecting anchor rod;711, arc groove;721, fixed arm;722, limiting shaft;723, flexible layer;751, short shaft. DETAILED DESCRIPTION

[0023] Please refer to Figs. 1-2 The present application provides a kind of coal mine roadway anti-impact ground pressure combined supporting equipment, comprising:

[0024] Anchor net 1, supporting plate 2, buffer adjusting assembly 7, stand 4 and connecting anchor rod 9, wherein the anchor net 1 is fixedly arranged on the top of roadway by a plurality of connecting anchor rods 9, the lower end of the anchor net 1 is provided with a supporting plate 2, the lower end of the supporting plate 2 is fixedly arranged with a side plate 3, the stand 4 is oppositely arranged on both sides of the roadway, the upper end of the stand 4 is provided with a crossbeam 5, the upper end of the crossbeam 5 is fixedly arranged with an arc frame 6, the arc frame 6 is provided with a mounting guide slot, a plurality of buffer adjusting assemblies 7 are mounted in the mounting guide slot, the buffer adjusting assembly 7 is rotatably connected with the connecting anchor rod 9 by shaft hole, and the supporting direction can be adjusted accordingly.

[0025] Among them, the side plate 3, the stand 4, the crossbeam 5 and the arc frame 6 are uniformly and spacedly arranged with a plurality of groups along the extension direction of the roadway.

[0026] It should be explained that the tail end of the connecting anchor rod 9 is coaxially provided with an assembly hole, which is convenient for plug-in connection with the buffer adjusting assembly 7, the top of the roadway is supported by the anchor net 1, the supporting plate 2 and the connecting anchor rod 9, and the harm caused by impact ground pressure and other coal mine disasters to the workers is prevented.

[0027] Further, a plurality of avoiding holes are formed in the supporting plate 2, which is convenient for preventing and treating stress concentration points (blasting pressure relief or adding support points) and adjusting the supporting position.

[0028] In this embodiment, each buffer adjusting assembly 7 comprises:

[0029] A main plate 71 is provided with two sets of arc-shaped slots 711 symmetrically arranged on both sides of the main plate 71 along the extending direction of the main plate 71, and a light hole is arranged in the middle of the main plate 71;

[0030] Two sets of sub-plates 72 are arranged at both ends of the main plate 71 along the extending direction of the main plate 71, and a fixing arm 721 is arranged at each end of the side of the sub-plate 72 close to the main plate 71, a limiting shaft 722 is rotatably arranged between the end portions of the extending end of the fixing arm 721, and the limiting shaft 722 is slidably arranged in the arc-shaped slot 711;

[0031] An elastic support rod 78 is hingedly connected to the lower end of each sub-plate 72; and

[0032] A balance plate 76 is arranged directly below the main plate 71, a square avoiding hole is arranged in the upper end of the balance plate 76, and the other end of the elastic support rod 78 is hingedly connected to the upper end of each side of the balance plate 76.

[0033] Each sub-plate 72 is provided with a pressure sensing unit.

[0034] In the embodiment, an adjusting rod 73 is arranged in the square avoiding hole, the middle and lower portions of the adjusting rod 73 are provided with threads, the upper portion of the adjusting rod 73 is rotatably connected to the connecting anchor rod 9 through the light hole, a support seat 75 is threadedly connected to the upper portion of the adjusting rod 73, a support spring 77 is sleeved on the adjusting rod 73, the support spring 77 is elastically supported between the support seat 75 and the main plate 71, and a distance sensor is arranged on the support spring 77.

[0035] It should be explained that in the initial state, the two sets of sub-plates 72 are in the maximum sliding-out position, the support range of the buffer adjusting assembly 7 is the largest, and the support strength is the lowest (this strength meets the normal support requirement), by adjusting the position of the support seat 75 on the adjusting rod 73, the compression degree of the support spring 77 can be adjusted, so that the support spring 77 always maintains effective buffering, as the support time of the support device increases and the blasting relief frequency increases, the upper surrounding rock may be impacted and moved downward, the support device is impacted and extruded, the buffering capacity gradually decreases, and even the buffering capacity is lost, at this time, the length of the support spring 77 is monitored by the distance sensor, when the support spring 77 is compressed to a set length, the support seat 75 is automatically controlled to move downward on the adjusting rod 73, the buffering performance is recovered, and at the same time, since the two sub-plates 72 are in the supporting state, the support plate 2 can limit the sub-plate 72, so that the sub-plate 72 is driven by the support seat 75 to slide and approach the main plate 71, the support strength of the buffer adjusting assembly 7 is increased, and safety accidents caused by the decrease or loss of the buffering capacity of the support device due to the increase of the blasting relief frequency are avoided.

[0036] In this embodiment, the lower part of the balance plate 76 is provided with a mounting seat 74, which is fixedly installed in the mounting guide groove, and the upper end of the mounting seat 74 is hingedly connected with the hydraulic cylinder 79 corresponding to the auxiliary plate 72, and the other end of the hydraulic cylinder 79 is hingedly connected to the lower end of the balance plate 76.

[0037] It should be explained that when the support seat 75 is adjusted, the hydraulic cylinder 79 can move synchronously to avoid being stuck.

[0038] When the buffering capacity of the buffering adjustment assembly 7 is recovered once, at this time, the two auxiliary plates 72 are located at one end close to the main plate 71, the support strength of the buffering adjustment assembly 7 is maximum, and the support range is minimum. The working personnel can add the buffering adjustment assembly 7 according to the actual situation, wherein, the addition can be uniformly added or locally concentratedly added in multiple points, so that the support mode is more reasonable and the support effect is guaranteed.

[0039] In this embodiment, the outer side of the support seat 75 is rotatably provided with one end of a short shaft 751 perpendicular to the extension direction of the main plate 71, and the other end of the short shaft 751 is rotatably arranged on the inner side of the balance plate 76.

[0040] In this embodiment, the lower end of the adjusting rod 73 is provided with a butt joint 710, the butt joint 710 is connected with a driving device 8, and the driving device 8 is fixedly arranged at the lower end of the arc-shaped frame 6. By controlling the driving device 8, the adjusting rod 73 can be rotated, and at the same time, the hydraulic cylinder 79 and the balance plate 76 are used to limit the rotation of the support seat 75, so that the support seat 75 can move along the adjusting rod 73 under the driving of the driving device 8.

[0041] It should be explained that as the mining work proceeds, the surrounding rock may be moved downward or transversely due to local blasting pressure relief or natural conditions, causing the anchor rod to be sheared and broken at its external fixed end, causing a safety accident. At this time, through the monitoring of the pressure value of the two groups of pressure sensing units on the two auxiliary plates 72, when the bearing pressure of the two auxiliary plates 72 is greater than the set pressure difference, the extension amount of the two groups of hydraulic cylinders 79 is automatically adjusted in real time, that is, the hydraulic cylinder 79 at the front end of the shearing direction is controlled to extend to support the side, and the hydraulic cylinder 79 on the opposite side is controlled to shrink synchronously, thereby reducing the risk of impact and breakage of the anchor rod under shear force, and prolonging the service life of the anchor rod.

[0042] In this embodiment, the upper end of the main plate 71 and the auxiliary plate 72 is adhered with a flexible layer 723. By arranging the flexible layer 723, the main plate 71 and the auxiliary plate 72 can overcome the slight deformation of the support plate 2 when supporting, and still completely fit with the support plate 2 for buffering support.

[0043] In specific implementation, the anchor net is fixed on the roadway roof by the connecting anchor rod, then a plurality of buffer adjusting assemblies are installed on the arc-shaped frame to support the supporting plate at the lower end of the anchor net, and the buffer supporting assembly is connected and installed to the anchor rod, the supporting spring is always in effective support through the adjustment of the supporting seat, the supporting effect is guaranteed, meanwhile, the pressure difference on both sides of the buffer adjusting assembly is monitored, the extension amount of the hydraulic cylinder is adjusted to change the supporting force on both sides, the connecting anchor rod is prevented from being broken at the end due to the shearing force, and thus the safety accident is avoided.

[0044] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A combined support device for preventing rockburst in coal mine roadways, characterized in that: include: The anchor net (1), support plate (2), buffer adjustment component (7), column (4) and connecting anchor rod (9) are provided. The anchor net (1) is fixed to the top of the roadway by multiple connecting anchor rods (9). The lower end of the anchor net (1) is provided with support plate (2). The lower end of the support plate (2) is fixed with side plate (3). The column (4) is erected on both sides of the roadway. The upper end of the column (4) is provided with crossbeam (5). The upper end of the crossbeam (5) is fixed with arc frame (6). The arc frame (6) is provided with installation guide groove. Multiple buffer adjustment components (7) are installed in the installation guide groove. The buffer adjustment component (7) and the connecting anchor rod (9) are connected by a shaft hole rotation, which can make targeted adjustments to the support orientation. Among them, the side plate (3), column (4), crossbeam (5) and arc frame (6) are all evenly spaced in multiple sets along the extension direction of the roadway; Each of the aforementioned buffer adjustment components (7) includes: The motherboard (71) has an arc-shaped structure. Two sets of arc-shaped grooves (711) are symmetrically opened through the side of the motherboard (71) along its extension direction. A light hole is opened in the middle of the motherboard (71). The sub-plate (72) is provided in two sets and is located at both ends of the extension direction of the main plate (71). The sub-plate (72) is provided with fixing arms (721) at both ends on the side of the sub-plate (71) close to the main plate (71). A limit shaft (722) is rotatably provided between the extended ends of the fixing arms (721). The limit shaft (722) is slidably provided in the arc-shaped groove (711). A flexible support rod (78), one end of which is hinged to the lower end of each of the sub-plates (72); and A balance plate (76) is located directly below the main board (71). A clearance square hole is provided through the upper end of the balance plate (76). The other ends of the elastic support rod (78) are respectively hinged to the upper two sides of the balance plate (76). Each of the sub-plates (72) is provided with a pressure sensing unit; A mounting base (74) is provided below the balance plate (76). The mounting base (74) is fixedly installed in the mounting guide groove. Hydraulic cylinders (79) are hinged to the upper two sides of the mounting base (74) corresponding to the sub-plate (72). The other end of the hydraulic cylinder (79) is hinged to the lower end of the balance plate (76).

2. The coal mine roadway anti-rockburst combined support equipment according to claim 1, characterized in that: An adjusting rod (73) is inserted into the clearance square hole. The adjusting rod (73) has a thread in the lower middle part, and the upper part of the adjusting rod (73) passes through the light hole and is rotatably connected to the connecting anchor rod (9). A support seat (75) is screwed onto the adjusting rod (73), and a support spring (77) is sleeved on the adjusting rod (73). The support spring (77) is elastically supported between the support seat (75) and the main board (71). A distance sensor is provided on the support spring (77).

3. The coal mine roadway anti-rockburst combined support equipment according to claim 2, characterized in that: The support base (75) has a short shaft (751) rotatably disposed on both sides of its outer end, perpendicular to the extension direction of the main board (71), and the other end of the short shaft (751) is rotatably disposed on the inner side of the balance plate (76).

4. The coal mine roadway anti-rockburst combined support equipment according to claim 2, characterized in that: The lower end of the adjusting rod (73) is provided with a connector (710), and the connector (710) is connected to a driving device (8), which is fixed at the lower end of the arc frame (6).

5. The coal mine roadway anti-rockburst combined support equipment according to claim 1, characterized in that: A flexible layer (723) is attached to the upper end of both the main board (71) and the sub-board (72).

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