阅读说明：本技术 一种煤矿用可移动开采掘进弓形柔性掩护支架 (Movable mining and tunneling arch-shaped flexible shield support for coal mine ) 是由 杨逾 苏宇新 梁鹏飞 孙艺丹 陈建平 李鑫 司俊廷 李帅 孟凡康 崔丽萍 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种煤矿用可移动开采掘进弓形柔性掩护支架,包括底座、安装在底座的底部的履带装置,底座的顶部两端通过两个液压支柱连接有顶梁；顶梁的两端分别与两个液压支柱的顶部为凹槽式连接；顶梁呈弓形,朝向采空区域的方向弯曲；顶梁的较低的一端固定有垫块,顶梁的较高的一端和垫块具有凹槽式限位孔,两个液压支柱的顶部通过弹簧分别与两个凹槽式限位孔连接。本发明可用以支撑、掩护采空区垮落的大量岩块,对顶板破碎岩块具有很好效果,对倾斜、急倾斜开采掘进工程有较好的适用性,液压支柱可以缓冲岩块滚落的冲击力,可有效防止冒顶事故的发生,保障开采作业的安全性,且本发明具有支护性能好、易于推广应用等优点,有较好的实用性。(The invention discloses a movable mining and tunneling arch-shaped flexible shield support for a coal mine, which comprises a base and a crawler device arranged at the bottom of the base, wherein two ends of the top of the base are connected with a top beam through two hydraulic supports; the two ends of the top beam are respectively connected with the tops of the two hydraulic props in a groove type; the top beam is arched and is bent towards the direction of the mining empty area; the lower end of the top beam is fixed with a cushion block, the higher end of the top beam and the cushion block are provided with groove-type limiting holes, and the tops of the two hydraulic supports are respectively connected with the two groove-type limiting holes through springs. The invention can be used for supporting and shielding a large number of rock blocks collapsed in a goaf, has good effect on roof broken rock blocks, has good applicability to inclined and steeply inclined mining and tunneling projects, can buffer the impact force of rock block rolling, can effectively prevent roof fall accidents, and ensures the safety of mining operation.)

1. A movable mining and tunneling arch-shaped flexible shield support for a coal mine is characterized by comprising a base and a crawler device arranged at the bottom of the base, wherein two ends of the top of the base are connected with a top beam through two hydraulic supports;

the two ends of the top beam are respectively connected with the tops of the two hydraulic supports in a groove mode;

the top beam is arched and is bent towards the direction of the mining area; the lower end of the top beam is fixed with a cushion block, the higher end of the top beam and the cushion block are provided with groove-type limiting holes, and the tops of the two hydraulic supports are respectively connected with the two groove-type limiting holes through springs.

2. A movable mining excavation arch-shaped flexible shield support for a coal mine as set forth in claim 1, wherein the roof beam includes a first bow arm and a second bow arm, the first bow arm is disposed horizontally, the second bow arm is disposed obliquely, and an included angle between the two bow arms is 120 degrees;

the cushion block is welded on the second bow arm, and the length of the first bow arm is larger than that of the second bow arm.

3. A movable mining excavation arch-shaped flexible shield support for a coal mine according to claim 1 or 2, wherein the two hydraulic props are vertically arranged.

4. The arch-shaped flexible shield support for movable mining and excavation for a coal mine according to claim 1, wherein a plurality of shield supports are sequentially arranged in an extending direction of a roadway, and a distance between adjacent shield supports is 0.5 to 2 m.

5. A mining movable excavation arch-shaped flexible shield support for a coal mine as set forth in claim 4, wherein adjacent shield supports are provided with steel plates on a side near the excavation area and on a side in a direction of the lateral excavation face for blocking broken rock pieces.

Technical Field

The invention belongs to the technical field of coal mining tunneling support, and particularly relates to a movable mining tunneling arch-shaped flexible shield support for a coal mine.

Background

In the coal mining process, in order to deal with the roof fall accident, hydraulic struts are usually adopted in engineering to support the roof. Because the top beam of the hydraulic support is rigid, the unevenness of the direct top plate can cause the non-uniformity of the stress between the top beam and the direct top plate, and the possibility of causing local roof fall accidents and even causing large roof fall accidents of coal mines can be generated.

The technical scheme of mining, tunneling and shield support for coal mines also appears in the prior art, but the general application range is narrow, the support research on inclined and steeply inclined mining and tunneling modes is less, the shape of a support working face is limited, most of the support working faces cannot be moved, the advancing of mining and tunneling work is not facilitated, and the working efficiency is reduced.

Disclosure of Invention

Based on the defects of the prior art, the invention solves the technical problem of providing the movable excavation arch-shaped flexible shield support for the coal mine, which can ensure that the top beam is uniformly stressed when the coal mine is supported, is convenient for adjusting the support position and has good support effect on the support of the broken roof during the excavation and excavation of inclined and steeply inclined coal seams.

In order to solve the technical problems, the invention is realized by the following technical scheme: the invention provides a movable mining and tunneling arch-shaped flexible shield support for a coal mine, which comprises a base and a crawler device arranged at the bottom of the base, wherein two ends of the top of the base are connected with a top beam through two hydraulic supports; the two ends of the top beam are respectively connected with the tops of the two hydraulic supports in a groove mode; the top beam is arched and is bent towards the direction of the mining area; the lower end of the top beam is fixed with a cushion block, the higher end of the top beam and the cushion block are provided with groove-type limiting holes, and the tops of the two hydraulic supports are respectively connected with the two groove-type limiting holes through springs.

Optionally, the top beam includes a first bow arm and a second bow arm, the first bow arm is horizontally arranged, the second bow arm is obliquely arranged, and an included angle between the two bow arms is 120 degrees;

the cushion block is welded on the second bow arm, and the length of the first bow arm is larger than that of the second bow arm.

Further, two hydraulic props are arranged vertically.

Optionally, a plurality of shield supports are sequentially arranged along the extending direction of the roadway, and the distance between every two adjacent shield supports is 0.5-2 m.

Furthermore, steel plates are arranged on one side close to a mining area and one side in the direction of a lateral tunneling working face of the adjacent shield supports and are used for blocking collapsed rock blocks.

Therefore, the movable excavation arch-shaped flexible shield support for the coal mine has at least the following beneficial effects:

1. the roof beam body coupling is on hydraulic prop, and the extending direction of roof beam body is crossing with hydraulic prop's extending direction, and the effort of detritus passes through the roof beam body and transmits to hydraulic prop, and the detritus that falls increases when, and the roof beam body transmits the load to hydraulic prop on, when the effort is greater than hydraulic prop's the predetermined power value, hydraulic prop is compressed, and roof beam body atress reduces, prevents that the roof beam body from destroying. Meanwhile, the hydraulic prop is compressed to effectively slow down the impact load caused by the rolling of the broken rock, and the whole stress of the structure is rebalanced after the hydraulic prop absorbs energy. The invention is used for mining, tunneling and supporting inclined and steep coal seams, can well support and shield the rock masses caving in the roadway, buffers the rolling impact force of the rock masses, and ensures the stability and safety of mining and gold digging.

2. The movable shield support can move along with the advancing of a tunneling working face, so that the support efficiency is greatly improved, meanwhile, after the tunneling work is finished, the shield support can be conveniently recovered and can be repeatedly used, and the tunneling cost is reduced.

3. The support device has the advantages of simple structure, reasonable design, convenience and safety in operation, good support performance, easiness in popularization and application and the like, can be used for supporting and shielding a large number of rock masses collapsing in the goaf, can effectively prevent roof fall accidents, and guarantees the safety of coal mining operation.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

FIG. 1 is a schematic structural view of a movable mining excavation arch-shaped flexible shield support for a coal mine according to the present invention;

FIG. 2 is a block diagram of the header of the present invention;

FIG. 3 is a cross-sectional view of a limiting aperture of the header of the present invention;

FIG. 4 is a cross-sectional view of a spacing hole of the spacer of the present invention;

in the figure: 1-a base; 2-a crawler device; 3-a first hydraulic prop; 4-a second hydraulic prop; 5-top beam; 6, cushion blocks; 7-first bow arm; 8-second bow arm; 9-groove type limiting holes; 10-high strength spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. In the description of the present invention, it should be noted that the terms "inner", "outer", "both ends", "one end", "the other end", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "disposed", "connected", and the like, are to be construed broadly and include, for example, "connected", whether fixedly, detachably, or integrally; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the arch-shaped flexible shield support for movable mining and tunneling for coal mines comprises a base 1, a crawler device 2, a first hydraulic prop 3, a second hydraulic prop 4 and a top beam 5, wherein the lower part of the base 1 is connected with the crawler device 2, and the base 1 is driven to move by the crawler device 2. Base 1 upper portion and first hydraulic prop 3, second hydraulic prop 4 is connected through the welded mode, first hydraulic prop 3 is connected through the spacing hole of high strength spring 10 with the recess formula 9 of back timber 5 with the higher one end of back timber 5, the lower one end of back timber 5 is fixed with cushion 6, second hydraulic prop 4 is connected through the spacing jogged joint of recess formula in high strength spring 10 and the cushion 6, cushion 6 is connected with the back timber 5 with the welded mode.

In one embodiment, the face is 4.8m wide, the first hydraulic prop 3 is 2.9m high and the second hydraulic prop 4 is 2.4m high. The top beam 5 is of an arch structure, is made of I-shaped steel through cutting and welding, and has the functions of supporting and shielding surrounding rocks. The I-steel has high strength and low material cost, and the processing technology of the arched top beam 5 is simple and is suitable for mass use. The roof beam 5 is curved towards the goaf area. The top beam 5 comprises a first bow arm 7 arranged horizontally and a second bow arm 8 arranged obliquely, and the first bow arm 7 and the second bow arm 8 are connected together in a welding mode to jointly form a body of the top beam 5. The angle between the two arms is 120 degrees, wherein the length of the first arm 7 is 3.6m and the length of the second arm 8 is 2.8 m.

In the actual mining and tunneling process, the distance between the adjacent shield supports is 0.5-2 m. The steel plate is used for supporting and blocking between the adjacent shield supports, the working form of the supports is ensured, a continuous supporting body is formed along the extension direction of the working surface, the working characteristics of the supports can be fully exerted, and the supporting and shielding effects are achieved. And steel plates are arranged on one side of the adjacent shield support close to the mining area and one side of the adjacent shield support in the direction of the lateral tunneling working face and are used for blocking collapsed rock masses.

When the mining and tunneling working face is pushed forwards, the upper rock begins to collapse, the broken rock mass begins to roll, the top beam 5 supports and shields the falling rock mass, the mine pressure of the top plate is supported, and the tunneling channel can be prevented from being blocked by the falling rock mass while the safety is guaranteed. The effort that the piece of rock that drops produced transmits for high strength spring 10 through back timber 5, finally transmits for first hydraulic prop 3, second hydraulic prop 4, when the effort that the piece of rock produced is greater than the default that first hydraulic prop 3 and second hydraulic prop 4 can bear jointly, first hydraulic prop 3, second hydraulic prop 4 begins to be compressed, first hydraulic prop 3, second hydraulic prop 4 volume reduces, pressure increases, the holding power of two hydraulic props increases, until rock that falls and mine pressure rebalance under hydraulic prop combined action.

The high-strength spring 10 can buffer the impact load generated by rock block rolling, so that the hydraulic support columns 3 and 4 are prevented from being damaged due to the impact load, meanwhile, the high-strength spring 10 can also play a certain energy-absorbing and shock-absorbing role, the load value which can be borne by the hydraulic support columns 3 and 4 is reduced, and the integral bearing capacity of the supporting structure is improved.

The hydraulic prop can be used for supporting and shielding a large number of rock blocks collapsed in a goaf, has a good effect on top plate broken rock blocks, has good applicability to inclined and steeply inclined mining and tunneling projects, can buffer the impact force of rock block rolling, can effectively prevent roof fall accidents, and ensures the safety of mining operation.

While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.