A gangue retaining device for steeply inclined coal seams

Abstract

The present invention provides a gangue retaining device for a steeply inclined coal seam, relating to the technical field of gangue retaining devices. The gangue retaining device comprises at least one gangue retaining assembly, each comprising a base and a baffle. The baffle has a first side and a second side disposed opposite each other, the first side being disposed on the base and the second side being disposed proximate to the coal wall, and the baffle being inclined downward from the first side to the second side. The gangue retaining device has a baffle capable of retaining gangue of various particle sizes. Furthermore, when gangue falls onto the baffle, the baffle not only absorbs part of the gangue's impact force, thereby reducing its kinetic energy, but also serves as a guide, directing or rebounding the gangue toward the coal wall, further reducing its kinetic energy. In this manner, the destructive force of the gangue is greatly weakened, thereby providing excellent protection for equipment and personnel at the coal mining face. Furthermore, the gangue retaining device has a simple structure, is easy to maintain, is not easily damaged, and has a long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of gangue retaining devices, and in particular to a gangue retaining device for a coal seam with a steep dip angle. Background Art

[0002] Mining steeply inclined coal seams is challenging, and protecting equipment and personnel at the mining face is a major challenge. Existing technologies typically utilize rock retaining nets for protection in steeply inclined coal seams. These nets are positioned above conveyors, arranged vertically along the inclination of the mining face, and near the bottoms of multiple hydraulic support beams. However, the protective effectiveness of existing rock retaining nets for steeply inclined coal seams is relatively poor. Summary of the Invention

[0003] The purpose of the present invention is to provide a gangue retaining device for a coal seam with a steep dip angle, so as to solve the technical problem in the prior art that the gangue retaining device for a coal seam with a steep dip angle has a relatively poor protective effect.

[0004] The steep-angle coal seam gangue retaining device provided by the present invention includes at least one group of gangue retaining components, and the gangue retaining components include a base and a baffle, and the baffle has a first side and a second side that are relatively arranged, the first side is arranged on the base, and the second side is arranged close to the coal wall, and from the first side to the second side, the baffle is arranged to be inclined downward.

[0005] The high-angle coal seam gangue retaining device provided by the present invention can produce the following beneficial effects:

[0006] The high-angle coal seam gangue retaining device provided by the present invention has a baffle disposed between the base of the gangue retaining assembly and the coal wall, capable of blocking gangue of various particle sizes. Moreover, the baffle is arranged at a downward inclination on the side close to the coal wall, that is, the baffle is arranged at an angle to the coal wall. Therefore, when the gangue falls on the baffle, the baffle not only absorbs part of the impact force of the gangue, thereby reducing the kinetic energy of the gangue, but also plays a guiding role, guiding or rebounding the gangue to the coal wall. When the gangue collides with the coal wall, the coal wall is soft and can better absorb the impact force of the gangue, thereby further reducing the kinetic energy of the gangue. In this way, under the blocking and guiding effect of the baffle, the gangue collides with the baffle and the coal wall multiple times, greatly weakening the destructive force of the gangue. As a result, the gangue retaining device can provide good protection for equipment and personnel in the coal mining face.

[0007] In addition, the steep-angle coal seam gangue retaining device provided by the present invention has a simple structure and is therefore easy to maintain; moreover, compared with a head-on collision between the baffle and the gangue, the head-on impact force of the gangue on the baffle when it is inclined is relatively small, so it is not easily damaged, thus having a long service life and a more lasting protective effect.

[0008] Furthermore, there are multiple groups of the rock retaining assemblies, and the multiple groups of the rock retaining assemblies are arranged along the direction of the coal wall of the coal mining working face.

[0009] Under this technical solution, multiple baffles are arranged in layers along the inclined coal mining face. Each baffle forms a barrier in the inclination of the front space of the coal mining face. The baffles and coal walls absorb the energy of the falling coal gangue in a step-by-step and multi-point manner, so that the impact force of the coal gangue that finally falls below is very small, thereby greatly reducing the damage to the equipment and personnel on the coal mining face.

[0010] Furthermore, the baffle is rotatably disposed on the base within a preset angle range, and the rotation axis extends along the inclination.

[0011] Under this technical solution, the baffle can rotate within a preset angle range. Therefore, when hit by falling coal gangue, the baffle can bounce up to release energy, effectively preventing the impact force of the coal gangue from being transmitted to the base, thereby protecting the base; and after releasing the energy, the baffle can be quickly reset under the action of gravity.

[0012] Furthermore, the rock retaining assembly further comprises a sleeve and a pin, one of which is fixedly arranged on the baffle, and the other is fixedly arranged on the base, and the sleeve and the pin are matched and plugged.

[0013] Under this technical solution, the baffle is arranged on the base through the sleeve and the pin shaft, the connection structure is simple, and the installation is convenient and quick.

[0014] Furthermore, a lower limit member is provided below the baffle, and the lower limit member is used to limit the downward rotation angle of the baffle.

[0015] Under this technical solution, when the baffle is in a natural state without being bounced up, the lower limit member abuts against the base, and the base supports the baffle through the lower limit member and the pin shaft or sleeve, and withstands the impact of coal gangue transmitted by the lower limit member and the pin shaft or sleeve.

[0016] Furthermore, an upper limit member is provided above the baffle, and the upper limit member is used to limit the upward rotation angle of the baffle.

[0017] Under this technical solution, when the baffle is impacted by gangue and rebounds to its maximum preset angle, the upper limit member collides with the base. The base, through the upper limit member, blocks further rotation of the baffle, allowing the baffle to return to its original position and resume its protective function. Furthermore, limit plates are provided below and above the baffle, allowing the baffle to be used in both left-hand and right-hand coal mining faces, thus providing a wide range of applications and strong adaptability.

[0018] Furthermore, the lower limiting member is a lower limiting plate, and the lower limiting plate is vertically fixed to the lower surface of the baffle;

[0019] And / or, the upper limit member is an upper limit plate, and the upper limit plate is vertically fixed to the upper surface of the baffle.

[0020] In this technical solution, the upper limit member and the lower limit member are plates, which have a simple structure and are light in weight, thus being easy to fix.

[0021] Furthermore, a notch is provided at the corner of the first side, and the notch matches the edge of the base; one of the sleeve and the pin is provided on the side of the base, and the other is provided on one side of the notch, and the upper limit member and the lower limit member are provided on the other side of the notch.

[0022] Under this technical solution, during assembly, the edge of the base is located at the notch of the baffle, the rotating connection structure is arranged on the side of the base, and the limiting member is located in front of the base.

[0023] Furthermore, the rock retaining assembly further comprises a connecting plate, which is arranged parallel to the retaining plate and is detachably fixedly connected thereto, and one of the sleeve and the pin is fixedly arranged on the connecting plate.

[0024] Under this technical solution, the baffle and the connecting plate are detachable, which facilitates quick replacement after the baffle is damaged; in addition, the connecting plate also increases the thickness of the connection with the sleeve, thereby improving the structural strength of the baffle connection.

[0025] Furthermore, the rock retaining device further includes a rock retaining net, which is arranged in front of each of the bases.

[0026] Under this technical solution, the slag retaining net plays a role in strengthening protection and can further improve the protective effect of the slag retaining device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0028] Figure 1 A bottom view schematic diagram of a partial structure of a rock retaining device provided in an embodiment of the present invention;

[0029] Figure 2 A schematic side view of a partial structure of a rock retaining device provided in an embodiment of the present invention;

[0030] Figure 3 A schematic structural diagram of a slag retaining assembly of a slag retaining device provided in an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the arrangement of the gangue retaining device provided in an embodiment of the present invention in a usage scenario.

[0032] Description of reference numerals:

[0033] 100-base; 110-pin;

[0034] 200- baffle; 201- first side; 202- second side; 203- notch; 210- casing; 220- lower limit plate; 230- upper limit plate; 240- connecting plate; 250- screw assembly;

[0035] 300-coal wall. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] This embodiment provides a large-angle coal seam gangue retaining device, such as Figure 4 As shown, the gangue retaining device includes at least one group of gangue retaining components, and the gangue retaining components include a base 100 and a baffle 200. The baffle 200 has a first side 201 and a second side 202 that are relatively arranged. The first side 201 is arranged on the base 100, and the second side 202 is arranged close to the coal wall 300. From the first side 201 to the second side 202, the baffle 200 is arranged to tilt downward.

[0038] The steep-angle coal seam gangue retaining device provided in this embodiment has a baffle 200 arranged between the base 100 of the gangue retaining assembly and the coal wall 300, which can block gangue of various particle sizes; moreover, the baffle 200 is arranged to be tilted downward on the side close to the coal wall 300, that is, the baffle 200 and the coal wall 300 are arranged at an angle, so when the gangue falls on the baffle 200, the baffle 200 can not only absorb part of the impact force of the gangue, thereby reducing the kinetic energy of the gangue, but also play a guiding role, guiding or rebounding the gangue to the coal wall 300. When the gangue collides with the coal wall 300, since the coal wall 300 is soft, the coal wall 300 can better absorb the impact force of the gangue, thereby further reducing the kinetic energy of the gangue. In this way, under the blocking and guiding effect of the baffle 200, the gangue collides with the baffle 200 and the coal wall 300 many times, and the destructive force of the gangue is greatly weakened. Therefore, the gangue retaining device can provide good protection for the equipment and personnel on the coal mining face.

[0039] In addition, the high-angle coal seam gangue retaining device provided in this embodiment has a simple structure, so it is easy to maintain; moreover, compared with the head-on collision between the baffle 200 and the coal gangue, the head-on impact force of the coal gangue that the baffle 200 withstands when it is tilted is relatively small, so it is not easy to be damaged, so it has a long service life and a more lasting protective effect.

[0040] Specifically, in this embodiment, Figure 4 As shown, multiple groups of gangue retaining assemblies are arranged along the direction of the coal wall 300 of the coal mining face. In this arrangement, multiple baffles 200 are arranged in layers along the inclined coal mining face, each baffle 200 forming a barrier in the direction of the front of the coal mining face. The baffles 200 and coal wall 300 absorb the energy of falling coal gangue in a step-by-step, multi-point manner, minimizing the impact force of the coal gangue that ultimately falls below, thereby significantly reducing damage to equipment and personnel in the coal mining face.

[0041] Specifically, in this embodiment, Figures 2 to 4 As shown, baffle 200 is rotatably mounted on base 100 within a preset angle range, with the axis of rotation extending along the inclination. With this technical solution, baffle 200 can rotate within the preset angle range. Therefore, when struck by falling coal gangue, baffle 200 can spring back to release energy, effectively preventing the impact force of the coal gangue from being transmitted to base 100 and protecting it. After releasing the energy, baffle 200 quickly returns to its original position under the action of gravity.

[0042] More specifically, in this embodiment, continue as Figures 2 to 4 As shown, the preset angle range can be set symmetrically about the inclination. For example, with the inclination being 0°, the preset angle range can be ±30°. Of course, the user can set the preset angle range according to the specific usage scenario.

[0043] Specifically, in this embodiment, Figure 1 and Figure 2 As shown, the rock retaining assembly further includes a sleeve 210 and a pin 110, wherein the sleeve 210 is fixedly mounted on the baffle 200, and the pin 110 is fixedly mounted on the base 100, with the sleeve 210 and the pin 110 matingly plugged in. In this arrangement, the baffle 200 is mounted on the base 100 via the sleeve 210 and the pin 110, resulting in a simple connection structure and convenient and quick installation.

[0044] It should be noted here that the setting positions of the sleeve 210 and the pin 110 are not limited to the above-mentioned situation. In other embodiments of the present application, the sleeve 210 can also be fixedly set on the base 100, and the pin 110 can be fixedly set on the baffle 200. That is, as long as the baffle 200 can be rotatably set on the base 100, the present application does not limit the specific setting positions of the sleeve 210 and the pin 110.

[0045] Specifically, in this embodiment, continue as Figure 1 and Figure 2 As shown, a lower stopper is provided below the baffle 200 to limit the downward rotation angle of the baffle 200. In this arrangement, when the baffle 200 is in its unfurled state, the lower stopper abuts against the base 100. The base 100 supports the baffle 200 through the lower stopper and the sleeve 210, and withstands the impact of the coal gangue transmitted by the lower stopper and the sleeve 210.

[0046] It should be noted here that the lower limit member is not limited to being set on the baffle 200. In other embodiments of the present application, the lower limit member can also be set on the base 100, as long as it can limit the baffle 200 to the minimum preset angle.

[0047] Specifically, in this embodiment, continue as Figure 1 and Figure 2 As shown, an upper limit member is provided above the baffle 200 to limit the upward rotation angle of the baffle 200. In this arrangement, when the baffle 200 rebounds to its maximum preset angle after being impacted by gangue, the upper limit member collides with the base 100. The base 100, through the upper limit member, blocks further rotation of the baffle 200, allowing the baffle 200 to return to its original position and resume its protective function. Furthermore, limit plates are provided below and above the baffle 200, allowing the baffle 200 to be used in both left-hand and right-hand coal mining faces, thus providing a wide range of applications and strong adaptability.

[0048] It should be noted here that the upper limit positioning member is not limited to being set on the baffle 200. In other embodiments of the present application, the upper limit positioning member can also be set on the base 100. It only needs to limit the baffle 200 from continuing to rotate when the baffle 200 rotates to the maximum preset angle and make it rotate in the opposite direction and reset.

[0049] Specifically, in this embodiment, the lower stopper is a lower stopper plate 220, which is vertically fixed to the lower surface of the baffle 200; the upper stopper is an upper stopper plate 230, which is vertically fixed to the upper surface of the baffle 200. In this arrangement, both the upper and lower stoppers are plates, which are simple in structure and light in weight, making them easy to fix.

[0050] It should be noted that in other embodiments of the present application, only one of the lower and upper stoppers may be a plate, while the other may be of another structural form. For example, the lower stopper may be a lower stopper plate 220, while the upper stopper may be a rubber block. In other words, as long as the lower and upper stoppers can constrain the baffle 200 within a predetermined angle range, the present application does not impose any restrictions on their specific structural forms.

[0051] Specifically, in this embodiment, Figure 1 As shown, the lower limit member includes only one lower limit plate 220, and the upper limit member includes only one upper limit plate 230. However, in other embodiments of the present application, the number of lower limit plates 220 and upper limit plates 230 is not limited to one. For example, the number of lower limit plates 220 is two, and the two lower limit plates 220 can also be symmetrically arranged; the number of upper limit plates 230 is also two, and the two upper limit plates 230 can also be symmetrically arranged. With this arrangement, the support effect of the limit plates on the baffle 200 is more balanced, thereby effectively preventing the baffle 200 from being deformed after being hit by coal gangue or rebounding by the base 100.

[0052] More specifically, in this embodiment, Figure 2 As shown, both the lower limiting plate 220 and the upper limiting plate 230 are triangular in shape, with one side of the triangle fixedly connected to the baffle 200 and one side capable of abutting the base 100. With this arrangement, the connection between the two limiting plates and the baffle 200 can be considered a linear connection, which has a larger connection area than a point connection, thereby ensuring a secure connection between the two limiting plates and the baffle 200. The contact between the two limiting plates and the base 100 can be considered a linear contact, which has a larger contact area than a point contact, thereby reducing the stress on the two limiting plates and preventing deformation.

[0053] Specifically, in this embodiment, Figure 1 As shown, a notch 203 is provided at the corner of the first side 201, which mates with the edge of the base 100; the pin 110 is provided on the side of the base 100, the sleeve 210 is provided on one side of the notch 203, and the upper and lower limit members are provided on the other side of the notch 203. During assembly, the edge of the base 100 is located at the notch 203 of the baffle 200, the rotation connection structure is provided on the side of the base 100, and the limit member is located in front of the base 100.

[0054] Specifically, in this embodiment, Figure 1 and Figure 2 As shown, the gangue retaining assembly further includes a connecting plate 240, which is arranged parallel to the retaining plate 200 and is detachably fixedly connected. One of the sleeve 210 and the pin 110 is fixedly mounted on the connecting plate 240. In this arrangement, the retaining plate 200 and the connecting plate 240 are detachable, thereby facilitating quick replacement of the retaining plate 200 if it is damaged. In addition, the connecting plate 240 is thicker at the connection with the sleeve 210, thereby improving the structural strength of the connection with the retaining plate 200.

[0055] More specifically, in this embodiment, the baffle 200 and the connecting plate 240 are connected via a screw assembly 250 , and the screw assembly 250 includes bolts and nuts.

[0056] Specifically, in this embodiment, the rock blocking device further includes a rock blocking net, which is arranged in front of each base 100. In this arrangement, the rock blocking net plays a role in strengthening protection, which can further improve the protection effect of the rock blocking device.

[0057] Specifically, in this embodiment, Figure 3 and Figure 4 As shown, the base 100 is the base of the hydraulic support, that is, the steep-angle coal seam gangue retaining device provided in this embodiment can be directly set on the base of the hydraulic support without the need for an additional base, which is convenient and easy to implement.

[0058] Specifically, in this embodiment, the baffle 200 can be made of high-strength steel plate, and the size of the baffle 200 can be set according to the height of the coal mining working face to meet the sealing requirements of the specific coal mining working face.

[0059] Finally, it should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0060] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to the embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A gangue retaining device for a steeply inclined coal seam, characterized in that: The invention comprises at least one set of gangue retaining components, wherein the gangue retaining components include a base (100) and a retaining plate (200), wherein the retaining plate (200) has a first side (201) and a second side (202) arranged opposite to each other, wherein the first side (201) is arranged on the base (100), and the second side (202) is arranged close to the coal wall (300), and the retaining plate (200) is arranged to be tilted downward from the first side (201) to the second side (202); The baffle (200) is rotatably disposed on the base (100) within a preset angle range, and the rotation axis extends along the inclination; The rock retaining assembly further comprises a sleeve (210) and a pin (110), one of which is fixedly arranged on the baffle (200) and the other is fixedly arranged on the base (100), and the sleeve (210) and the pin (110) are matched and plugged; A lower limiter is provided below the baffle (200) or on the base (100), and the lower limiter is used to limit the angle at which the baffle (200) can rotate downward; An upper limit member is further provided above the baffle (200) or on the base (100), and the upper limit member is used to limit the angle at which the baffle (200) can rotate upward; A notch (203) is provided at a corner of the first side (201), and the notch (203) matches the edge of the base (100); one of the sleeve (210) and the pin shaft (110) is provided on the side of the base (100), and the other is provided on one side of the notch (203); the upper limit member and the lower limit member are provided on the other side of the notch (203).

2. The high-angle coal seam gangue retaining device according to claim 1 is characterized in that: There are multiple groups of the gangue retaining components, and the multiple groups of the gangue retaining components are arranged along the direction of the coal wall (300) of the coal mining working face.

3. The high-angle coal seam gangue retaining device according to claim 2, characterized in that: The lower limiting member is a lower limiting plate (220), and the lower limiting plate (220) is vertically fixed to the lower surface of the baffle (200); And / or, the upper limit member is an upper limit plate (230), and the upper limit plate (230) is vertically fixed to the upper surface of the baffle (200).

4. The high-angle coal seam gangue retaining device according to claim 2, characterized in that: The gangue retaining assembly further comprises a connecting plate (240), the connecting plate (240) being arranged parallel to the retaining plate (200) and being detachably fixedly connected, and one of the sleeve (210) and the pin shaft (110) being fixedly arranged on the connecting plate (240).

5. The steep-angle coal seam gangue retaining device according to any one of claims 1 to 4, characterized in that: The rock blocking device further comprises a rock blocking net, which is arranged in front of each base (100).

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