CN212428900U - Coal mine tunneling and supporting device - Google Patents

Abstract

The utility model discloses a colliery tunnelling supporting device, support column lower extreme fixed connection supporting seat, support column upper end fixedly connected with supporting beam. A roller cavity is arranged at the bottom of the seat body of the supporting seat, and a roller device is arranged in the roller cavity. The rolling shaft device protrudes out of the lower bottom of the base body to support the base body, or the rolling shaft device is contracted in the rolling shaft cavity. The lower bottom surface and the upper bottom surface of the supporting piece are both provided with a plurality of supporting rollers. The structural size of the lower end part of the supporting cavity is the same as that of the rotating shaft cavity, so that the rotating shaft can slide into the lower end part of the supporting cavity. The coal mine tunneling support device has an overall structure, can conveniently realize the movement and locking functions, and has a roller body with strong support strength to meet the requirement of supporting and rolling in the movement process; be equipped with the locking structure between base and the ground, when removing reasonable position, locking between base and the tunnel ground that can be quick, guarantee supporting device's supporting effect, satisfy the requirement that the tunnel was strutted.

Description

Coal mine tunneling and supporting device

Technical Field

The utility model relates to a colliery tunnelling roadway support operative installations structural design technical field especially relates to a colliery tunnelling supporting device.

Background

Coal mines in China are mainly underground mining, a large number of roadways need to be excavated underground, and roadway support is adopted to keep the roadways smooth and surrounding rocks stable, so that the method has important significance for coal mine construction and production.

Most coal mine tunnels are generally drilled by blasting and mechanical tunneling, and along with the continuous improvement of the performance of tunneling mechanical equipment, mechanical tunneling becomes the main development direction. However, more than 40% of human casualties in coal mine tunneling production operation are roof accidents in the working face supporting process. Since the tunneling space of the tunnel is limited and the empty roof operation is not allowed, the tunneling and the supporting are always influenced mutually. Because the empty roof operation is not allowed, the support must be carried out in time, and the advance support must be made before the permanent support, and the support always is the bottleneck influencing the progress and the safety of the tunneling operation.

In the prior art, a coal mine tunneling support device needs to have larger gripping force with the ground in order to ensure the support strength; in order to conveniently move and adjust the position of the supporting device, a sliding device is required to be arranged at the bottom of the supporting device; the existing supporting device can only take one of the supporting devices because of the contradiction in design between the larger gripping force and the arrangement of the sliding device. Some supporting devices move inconveniently, and the friction between some supporting devices and the ground is not enough, which affects the supporting strength.

Therefore, the supporting device in the prior art has the defects of inconvenient movement or insufficient supporting strength.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a main aim at provides a structural design is reasonable, makes things convenient for whole strutting arrangement to remove the adjusting position, again can be convenient and ground between the locking, satisfy the colliery tunnelling strutting arrangement of strut effect.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a coal mine tunneling support device comprises: support column, a supporting beam and a supporting seat, support column lower extreme fixed connection the supporting seat, support column upper end fixedly connected with a supporting beam makes support connection between supporting seat and the ground, a supporting beam is to the effect of tunnelling strut.

In a preferred embodiment, the support seat comprises: a seat body and a rolling shaft device; a roller shaft cavity is formed in the lower bottom of the seat body, and the roller shaft device is arranged in the roller shaft cavity; the roller device protrudes out of the lower bottom of the base body to support the base body, or the roller device is contracted inside the roller cavity.

In a preferred embodiment, the roller device includes: the roller comprises a roller body, a rotating shaft, a supporting piece and a supporting piece.

In a preferred embodiment, a rotating shaft cavity is formed at two ends of the roller cavity, a supporting cavity is formed on the upper side of the rotating shaft cavity, a supporting cavity is formed at the upper end of the supporting cavity, the other end of the supporting cavity extends out of the side wall of the seat body, the upper side of the rotating shaft cavity is communicated with the supporting cavity, and the upper side of the supporting cavity is communicated with the supporting cavity.

In a preferred embodiment, the center of the roller body is fixedly connected with the rotating shaft, two end parts of the rotating shaft extend into the cavity of the rotating shaft, the supporting part is connected in the supporting cavity in a supporting manner, and the supporting part is connected in the supporting cavity in a sliding manner; the upper side of the rotating shaft is in supporting connection with the supporting piece, and the upper end of the supporting piece is in supporting connection with the supporting piece; the supporting piece supports the supporting piece, the supporting piece supports the rotating shaft, and the lower bottom of the rolling shaft body extends out of the lower bottom surface of the seat body.

In a preferred embodiment, the lower bottom surface and the upper bottom surface of the supporting member are each provided with a plurality of supporting rollers, so that the supporting rollers are in supporting contact with the upper bottom surface and the lower bottom surface of the supporting cavity.

In a preferred embodiment, the supporting cavity is provided with a dovetail groove at the middle part, and the supporting piece is of a dovetail structure.

In a preferred embodiment, the structural size of the lower end of the support cavity is the same as the structural size of the rotating shaft cavity, so that the rotating shaft slides into the lower end of the support cavity.

In a preferred embodiment, the lower end of the support element is crescent-shaped, the radius of the crescent being the same as the radius of the axis of rotation.

In a preferred embodiment, the supporting piece is inclined at one end part of the supporting cavity close to the supporting cavity; the horizontal projection length of the inclined plane is smaller than the thickness of the supporting piece, so that the non-inclined plane position of the supporting piece and the upper end part of the supporting piece are supported.

In a preferred embodiment, the upper surface and the lower bottom surface of the supporting member are symmetrical;

the two sides of the upper surface and the lower bottom surface of the supporting piece are in arc transition;

the two sides of the upper end of the supporting piece are in arc transition, and the width of the upper end of the supporting piece is smaller than or equal to the length of the supporting rolling shaft.

In a preferred embodiment, at least two roller assemblies are provided within each roller cavity.

In a preferred embodiment, all of the strut ends are fixedly connected to a handle.

In a preferred embodiment, the bottom of the seat body is fixedly connected with an anti-skid projection; the height of the anti-skid protrusions is smaller than the maximum extending height of the roller device.

In a preferred embodiment, the support beam includes: a plurality of supports; and the adjacent supporting pieces are hinged, and the supporting pieces at two end parts are hinged with the upper end parts of the supporting columns.

In a preferred embodiment, a pillar support body is fixedly connected to the upper end of the supporting pillar, and one end of the pillar support body is hinged to the support member.

In a preferred embodiment, the lower bottom surface of each support member is hinged with a hydraulic support rod, and the other end of the hydraulic support rod is hinged with the side wall of the support column.

In a preferred embodiment, the pressure chambers of the hydraulic support rods to which all the supports are hinged are in communication with one another.

In a preferred embodiment, each support member is integrally formed or fixedly connected with a support arch, and the upper end of the support arch is fixedly connected with a limiting thorn.

In a preferred embodiment, a support arch is integrally formed on the upper side of the column support body, and the support arch dimension on the upper side of the column support body is larger than the support arch on the upper side of the support member.

The utility model discloses a colliery tunnelling is strutted device has following beneficial effect:

the utility model provides a colliery tunnelling supporting device, support column lower extreme fixed connection supporting seat, support column upper end fixedly connected with a supporting beam. A roller cavity is arranged at the bottom of the seat body of the supporting seat, and a roller device is arranged in the roller cavity. The rolling shaft device protrudes out of the lower bottom of the base body to support the base body, or the rolling shaft device is contracted in the rolling shaft cavity. The lower bottom surface and the upper bottom surface of the supporting piece are both provided with a plurality of supporting rollers, so that the supporting rollers are in supporting contact with the upper bottom surface and the lower bottom surface of the supporting cavity. The structural size of the lower end part of the supporting cavity is the same as that of the rotating shaft cavity, so that the rotating shaft can slide into the lower end part of the supporting cavity. The problem that in the prior art, the supporting device is inconvenient to carry in the roadway supporting use process, but the tunneling roadway space is narrow and is not suitable for mechanized supporting of large-scale equipment; the coal mine underground construction personnel have the defects of high labor intensity, inconvenient support use, even insufficient support intensity and coal mine accidents. The coal mine tunneling support device has an overall structure, can conveniently realize the movement and locking functions, and has a roller body with strong support strength to meet the requirement of supporting and rolling in the movement process; be equipped with locking structure between pedestal and the ground, when removing reasonable position, locking between pedestal and the tunnel ground that can be quick, guarantee supporting device's supporting effect, satisfy the requirement of tunnel support.

Drawings

Fig. 1 is a schematic structural view of a coal mine excavation supporting device according to an embodiment of the present disclosure;

fig. 2 is an enlarged partial view of a portion a of the coal mine excavation supporting device shown in fig. 1 according to one embodiment of the disclosure;

fig. 3 is an enlarged partial view of a portion B of the coal mine excavation supporting device shown in fig. 1 according to one embodiment of the disclosure;

fig. 4 is a cross-sectional view of the coal mine excavation supporting device shown in fig. 3, wherein the cross-sectional position is a supporting cavity upper surface position, and a rotating shaft, a supporting piece and a supporting piece are not installed;

fig. 5 is a side view of a base of a coal mine excavation supporting device according to one embodiment of the present disclosure.

[ description of main reference symbols ]

1. A support column 11, a support column support body;

2. the support beam 21, the support piece 22, the hydraulic support rod 23, the support arch 24 and the limit thorn;

3. a support seat 31 and a seat body;

32. the roller device comprises a roller device 321, a roller body 322, a rotating shaft 323, a supporting piece 324, a supporting piece 325, a supporting roller 326 and a handle;

33. a roller cavity 331, a rotating shaft cavity 332, a support cavity 333 and a support cavity;

34. and (4) anti-skid bulges.

Detailed Description

The coal mine excavation supporting device of the present invention will be described in further detail with reference to the accompanying drawings and the embodiments of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, 2, 3, 4 and 5, the coal mine excavation supporting device comprises: the support comprises a hydraulic drive support column 1, a support beam 2 for supporting the top plate and a support seat 3 for supporting and fixing the support beam and the roadway ground. The lower end of the support column 1 is fixedly connected with a support seat 3, the upper end of the support column 1 is fixedly connected with a support beam 2, the support seat 3 is connected with the ground in a supporting mode, and the support beam 2 plays a role in supporting and protecting a driving roadway. Preferably, the number of the support columns 1 is two, and the lower end of each support column 1 is provided with one support seat 3 to form a support device of the door frame structure.

In order to realize that the supporting seat 3 can support the whole supporting device to move, the carrying and the position adjustment of the whole supporting device are realized. This supporting seat 3 includes: a seat body 31 for bearing and connecting; the seat body 31 can support the roller device 32 off the roadway floor. In order to facilitate the installation of the roller device 32, a roller cavity 33 is formed on the bottom of the seat body 31, and the roller device 32 is disposed inside the roller cavity 33. When the roller device 32 is in a working state, the lower bottom of the protruding seat body 31 supports the seat body 31, so that the roller device 32 can roll on the ground, and the whole supporting device can be carried and moved. When the supporting device is in a non-working state, the roller device 32 is contracted in the roller cavity 33, and the position between the whole supporting device and the roadway ground is ensured to be fixed through the supporting action between the bottom of the seat body 31 and the roadway ground and the friction action between the seat body 31 and the ground.

In order to ensure that the roller device 32 can be switched between the working state and the non-working state, and further meet the use requirement. The roller device 32 includes: a roller body 321 for supporting; a rotating shaft 322 for supporting the roller body 321 and realizing the rolling action of the roller body 321; a support part 323 for supporting the rotating shaft 322 and further ensuring that the rolling shaft body 321 supports the lower bottom surface of the seat body 31; and a supporter 324 supporting an end of the supporter 323.

To facilitate the installation of the roller body 321, the rotating shaft 322, the supporting member 323, and the supporting member 324. The two ends of the roller cavity 33 are provided with a rotating shaft cavity 331 (corresponding to the end size of the rotating shaft 322), the upper side of the rotating shaft cavity 331 is provided with a supporting cavity 332 (corresponding to the size structure of the supporting piece 323), the upper end of the supporting cavity 332 is provided with a supporting cavity 333 (installing the supporting piece 323), and the other end of the supporting cavity 333 extends out of the side wall of the seat body 31 (the supporting piece 324 is conveniently arranged at the working position, and the supporting piece 324 can be taken out). In order to ensure the mutual functions of the roller body 321, the rotating shaft 322, the supporting member 323 and the supporting member 324, the upper side of the rotating shaft cavity 331 is communicated with the supporting cavity 332, and the upper side of the supporting cavity 332 is communicated with the supporting cavity 333.

The positions and the connection relations among the roller body 321, the rotating shaft 322, the supporting part 323 and the supporting part 324 are as follows: a rotating shaft 322 is fixedly connected to the center of the roller body 321, two end parts of the rotating shaft 322 extend into the rotating shaft cavity 331, a supporting part 323 is connected to the inside of the supporting cavity 332 in a supporting manner, and a supporting part 324 is connected to the inside of the supporting cavity 333 in a sliding manner; the upper side of the rotating shaft 322 is in supporting connection with a supporting part 323, and the upper end of the supporting part 323 is in supporting connection with a supporting part 324; the supporting member 323 is supported by the supporting member 324, the rotating shaft 322 is supported by the supporting member 323, and the lower bottom of the roller body 321 extends out of the lower bottom of the seat body 31. Namely: the supporting function of the supporting piece 324 realizes the sliding of the supporting piece 323, and the supporting piece jacks the rotating shaft 322, so that the rolling shaft body 321 is ensured to extend out of the bottom of the seat body 31, and the function of supporting the seat body 31 is realized; further, by withdrawing the supporting member 324, the supporting member 323 loses support and slides upward, and the rotating shaft 322 slides upward to enter the lower end of the supporting cavity, so that the roller body 321 enters the roller cavity 33. The seat body 31 is ensured to be in a non-working state, and the friction limiting effect between the seat body 31 and the ground is achieved.

In order to facilitate the supporting member 324 to enter the supporting cavity 333 or exit the supporting cavity 333, it is ensured that the pair of roller bodies 321 extend out of the seat body 31 or retract into the roller cavity 33; the lower bottom surface and the upper bottom surface of the supporting piece 324 are respectively provided with a plurality of supporting rollers 325, so that the supporting rollers 325 are in supporting contact with the upper bottom surface and the lower bottom surface of the supporting cavity 333; the support of the support roller 325 ensures that the sliding friction between the support member 324 and the support cavity 333 is converted into rolling friction.

In order to limit the position of the supporting member 323, the position of the supporting member 323 is ensured to be fixed. The middle of the supporting cavity 332 is a dovetail groove, and the supporting part 323 is a dovetail structure. The dovetail groove and the dovetail joint can not only realize the sliding function, but also ensure the mutual limiting function.

In order to satisfy the requirement that the rotating shaft 322 has a reasonable space to slide when the roller device 322 retracts into the roller cavity 33. The lower end of the support cavity 332 has the same structural dimensions as the rotating shaft cavity 331 so that the rotating shaft 322 slides into the lower end of the support cavity 332.

Through the reasonable structural design of the roller device 32 and the roller cavity 33, the roller device 32 can extend out of the bottom of the seat body 31 or be retracted into the roller cavity 33, and the supporting work of the roller device 32 in the carrying and moving processes can be met. Furthermore, the reasonable structural design of the supporting piece 324 reduces the friction force, is convenient for a user to use, and the adjustment effect of the supporting piece 324 meets the conversion between the working state (extending out of the bottom of the seat body 31) and the non-working state (retracting to the roller cavity 33) of the roller device 32.

In order to facilitate the supporting function of the support member 323 on the rotation shaft 322, the operation state of the rotation shaft 322 is ensured. The lower end of the supporting element 323 is crescent-shaped, the radius of the crescent-shaped is the same as that of the rotating shaft 322, and the rotating shaft 322 is supported in the crescent-shaped structure.

To reduce the frictional distance between the support members 323 of the support member 324 during withdrawal of the support member 324 from the support cavity 333. The supporting member 324 is inclined at an end of the supporting cavity 333 adjacent to the supporting cavity 332; the horizontal projection length of the inclined surface is smaller than the thickness of the supporting member 323, so that the non-inclined surface position of the supporting member 324 is supported by the upper end of the supporting member 323. Namely: a part of the end part of the supporting piece 324 is an inclined surface, so that the extending size limiting effect of the supporting piece 324 can be ensured; and the defect that the friction distance between the supporting piece 324 and the supporting piece 323 is too large to conveniently pull out the supporting piece in the process of withdrawing the supporting piece 324 can be reduced. The further inclined surface can provide a buffer surface by sliding the supporting member 323, so as to prevent the supporting member 323 from directly pushing into the supporting cavity 333 and damaging a part of the structure of the whole seat body 31 by impact.

In order to reduce the labor intensity of workers and facilitate the workers to use the supporting piece 324 in the environment with poor underground light, the upper surface and the lower bottom of the supporting piece 324 are of a symmetrical structure; so that the prop member 324 can be used on both sides.

A supporting roller 325 is provided at a position for facilitating the operation between the supporting member 324 and the supporting member 323. The two sides of the upper surface and the lower bottom surface of the supporting piece 324 are in arc transition; both sides of the upper end of the supporting member 323 are in arc transition, and the width of the upper end of the supporting member 323 is less than or equal to the length of the supporting roller 325. The supporting function between the supporting member 323 and the supporting member 324 is satisfied completely by the supporting function of the supporting roller 325.

In order to ensure the support balance of the seat body 31 and the stability in the moving process, at least two roller devices 32 are arranged in each roller cavity 33. The two roller devices 32 arranged in parallel ensure the support stability of the seat body 31.

To facilitate the withdrawal of the struts 324, a handle 326 is fixedly attached to the ends of all of the struts 324. The supporter 324 is pulled by the handle 326 to separate the supporter 323 from the supporter 324.

In order to ensure the friction fixation between the seat body 31 and the ground, and further ensure the supporting strength of the whole supporting device to the roadway roof. The bottom of the seat body 31 is fixedly connected with an antiskid lug 34; the height of the stud 34 is less than the maximum extension of the roller means 32. And the friction locking between the whole supporting device and the roadway ground is ensured through the limiting effect between the anti-skid protrusions 34 and the roadway ground.

In order to further guarantee the supporting strength of the top plate, especially to guarantee that the local pressure is large, the balanced bearing can be realized, and the defect that the supporting beam 2 is damaged due to the fact that the local bearing of the supporting beam 2 is too large is avoided. The support beam 2 includes: a plurality of supports 21. The adjacent supporting pieces 21 are hinged, and the supporting pieces 21 at the two end parts are hinged with the upper end parts of the supporting columns 1 to form a supporting beam 2 structure.

In order to facilitate the hinge connection with the supporting member 21, the upper end of the supporting column 1 is fixedly connected with a supporting column supporting body 11, and one end of the supporting column supporting body 11 is hinged with the supporting member 21.

The lower bottom surface of each supporting piece 21 is hinged with a hydraulic supporting rod 22, and the other end of each hydraulic supporting rod 22 is hinged with the side wall of the supporting column 1; the requirement on the strength of a single hydraulic support rod 22 is reduced, and the supporting strength of the support beam 2 on the top plate can be ensured.

In order to achieve an interaction between the supporting members 21, especially when a local pressure is large, the supporting members can ensure a certain cushioning effect and pass through the interaction between the supporting members 21. The pressure chambers of the hydraulic support rods 22 hinged to all the supporting members 21 are communicated with each other. The same supporting force is provided by all the hydraulic supporting rods 22, so that when the local pressure is too large, the adjacent hydraulic supporting rods 22 also provide larger supporting force, and the supporting strength of the top plate is ensured.

In order to disperse the supporting force, the supporting strength is ensured. A support arch 23 is integrally formed or fixedly connected to the upper side of each support member 21. In order to improve the connection strength between the supporting piece 21 and the top plate, the upper end of the supporting arch 23 is fixedly connected with a limiting thorn 24.

Because the supporting column 1 has the strongest supporting strength, the supporting arch is integrally formed on the upper side of the supporting column body 11, the supporting arch size of the upper side of the supporting column body 11 is larger than that of the upper side of the supporting piece 21, the requirement of the supporting strength of the supporting piece 21 is reduced, and the supporting strength and the service life of the whole supporting device are improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. The utility model provides a colliery tunnelling supporting device which characterized in that includes: the supporting device comprises a supporting column (1), a supporting beam (2) and a supporting seat (3), wherein the lower end of the supporting column (1) is fixedly connected with the supporting seat (3), the supporting beam (2) is fixedly connected to the upper end of the supporting column (1), so that the supporting seat (3) is in supporting connection with the ground, and the supporting beam (2) plays a role in supporting and protecting a tunneling roadway;

the support seat (3) comprises: a seat body (31) and a rolling shaft device (32); a roller cavity (33) is formed in the lower bottom of the seat body (31), and the roller device (32) is arranged in the roller cavity (33); the roller device (32) protrudes out of the lower bottom of the seat body (31) to support the seat body (31), or the roller device (32) is contracted in the roller cavity (33);

the roller device (32) comprises: a roller body (321), a rotating shaft (322), a supporting piece (323) and a supporting piece (324);

a rotating shaft cavity (331) is formed in each of two ends of the roller shaft cavity (33), a supporting cavity (332) is formed in the upper side of the rotating shaft cavity (331), a supporting cavity (333) is formed in the upper end of the supporting cavity (332), the other end of the supporting cavity (333) extends out of the side wall of the seat body (31), the upper side of the rotating shaft cavity (331) is communicated with the supporting cavity (332), and the upper side of the supporting cavity (332) is communicated with the supporting cavity (333);

the center of the rolling shaft body (321) is fixedly connected with the rotating shaft (322), two end parts of the rotating shaft (322) extend into the rotating shaft cavity (331), the supporting piece (323) is connected in the supporting cavity (332) in a supporting manner, and the supporting piece (324) is connected in the supporting cavity (333) in a sliding manner; the upper side of the rotating shaft (322) is in supporting connection with the supporting part (323), and the upper end of the supporting part (323) is in supporting connection with the supporting part (324); the supporting piece (323) is supported by the supporting piece (324), the rotating shaft (322) is supported by the supporting piece (323), and the lower bottom of the rolling shaft body (321) extends out of the lower bottom surface of the seat body (31);

the lower bottom surface and the upper bottom surface of the supporting piece (324) are respectively provided with a plurality of supporting rollers (325), so that the supporting rollers (325) are in supporting contact with the upper bottom surface and the lower bottom surface of the supporting cavity (333);

the middle part of the supporting cavity (332) is a dovetail groove, and the supporting piece (323) is of a dovetail tenon structure;

the structural size of the lower end part of the supporting cavity (332) is the same as that of the rotating shaft cavity (331), so that the rotating shaft (322) slides into the lower end part of the supporting cavity (332).

2. A coal mine tunnelling support device as defined in claim 1, in which the lower end of the support member (323) is crescent shaped, the radius of the crescent being the same as the radius of the axis of rotation (322).

3. A coal mine tunnelling support device as claimed in claim 1, in which the brace member (324) is inclined at an end of the brace cavity (333) adjacent the brace cavity (332); the horizontal projection length of the inclined surface is smaller than the thickness of the support member (323), so that the non-inclined surface position of the supporting member (324) is supported with the upper end part of the support member (323).

4. A coal mine tunnelling support device as claimed in claim 3, in which the upper and lower faces of the brace (324) are of symmetrical construction;

the two sides of the upper surface and the lower bottom surface of the supporting piece (324) are in arc transition;

two sides of the upper end of the supporting piece (323) are in arc transition, and the width of the upper end of the supporting piece (323) is smaller than or equal to the length of the supporting roller (325).

5. A coal mine tunnelling support device as claimed in claim 1, wherein there are at least two roller means (32) within each roller cavity (33).

6. A coal mine tunnelling support device as claimed in claim 5, in which all of the struts (324) are fixedly connected at their ends to a handle (326).

7. The coal mine excavation support device according to claim 1, characterized in that the bottom of the seat body (31) is fixedly connected with an antiskid lug (34); the height of the anti-skid protrusions (34) is smaller than the maximum extending height of the roller device (32).

8. A coal mine excavation support device according to any one of claims 1 to 7, wherein the support beam (2) includes: a plurality of supports (21); the adjacent supporting pieces (21) are hinged, and the supporting pieces (21) at two end parts are hinged with the upper end part of the supporting column (1);

the upper end part of the supporting column (1) is fixedly connected with a supporting column supporting body (11), and one end of the supporting column supporting body (11) is hinged with a supporting piece (21);

the lower bottom surface of each supporting piece (21) is hinged with a hydraulic supporting rod (22), and the other end of each hydraulic supporting rod (22) is hinged with the side wall of the supporting column (1);

the pressure cavities of the hydraulic support rods (22) hinged with the support parts (21) are communicated with each other.

9. The coal mine excavation supporting device according to claim 8, characterized in that each supporting piece (21) is integrally formed on the upper side or fixedly connected with a supporting arch (23), and the upper end of each supporting arch (23) is fixedly connected with a limiting thorn (24).

10. A coal mine excavation supporting device according to claim 8, characterized in that the upper side of the pillar supporting body (11) is integrally formed with a supporting arch, and the supporting arch size of the upper side of the pillar supporting body (11) is larger than that of the upper side of the supporting member (21).

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