Support structure for frame-free section of lower outlet of steeply inclined working face

Abstract

The utility model discloses a steeply inclined working face lower outlet frame-section-free supporting structure which comprises a working face support first frame and a roadway end support, a frame-section-free supporting device is arranged between the working face support first frame and the roadway end support, and the frame-section-free supporting device comprises a base and a top beam. Four telescopic stand columns are arranged between the base and the top beam, every two telescopic stand columns form a group in the length direction, a shield beam is arranged between the two groups of telescopic stand columns, the bottom of the shield beam is connected with the base through a front connecting rod and a rear connecting rod, a tail beam is hinged to the tail of the top beam, and the tail beam stretches out and draws back through a tail beam jack. The top beam is provided with a telescopic beam through a telescopic beam jack, side beams are hinged to the two sides of the top beam in the width direction, the side beams stretch out and draw back through side beam jacks, and the technical problems that in the prior art, the supporting difficulty of a frame-free section is large, the supporting strength is low, and the supporting width is not matched easily are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining machinery, in particular to a frameless support structure for an outlet under a steeply inclined working surface. Background Art

[0002] In recent years, the mining speed and production capacity of coal mining faces have increased significantly, resulting in increasingly heavy loads on the end supports. In particular, between the first support frame (head frame) at the lower exit and the end support frame of the roadway, due to the matching relationship between the "three machines" of the working face and the influence of the ups and downslopes of the working face equipment, a 1-2m "triangular hanging plate" or "arc triangular hanging plate" area is formed between the working face and the lower drift machine roadway. Normal working face supports or head frames cannot be arranged in this section. The support must be strengthened by installing a single hydraulic support column with a metal hinged top beam. The support installation is extremely difficult and the safety risks are extremely high. There are many problems with the "no-frame section" support, which are mainly manifested in the following aspects:

[0003] (1) The support is difficult, especially at the lower end of the working face, the beams and the pillars are very difficult. As the conveyor on the working face goes down and up, the support adjustment becomes more difficult;

[0004] (2) The support strength is low. The single hydraulic prop has a large amount of bottom drilling and is difficult to withdraw. For coal seams with large roof pressure, the support strength cannot be achieved, which easily causes the roof at the safe exit of the working face to sink.

[0005] (3) The support speed is slow. Since the retraction speed of the single hydraulic support and metal articulated top beam is difficult to increase significantly, the advancement speed of the coal mining face is restricted, making it difficult to achieve high production and high efficiency of the fully mechanized mining face.

[0006] (4) The support width varies greatly. Generally, a 0.4-0.5m section without support is reserved in the working face equipped with a horizontal end support. The telescopic beam of the end support can be used for temporary support. However, in the actual mining process, in order to facilitate the control of equipment sliding down, this section is generally around 2m, and the width is inconsistent with the advancement of the working face, and even the head support and the end support are "dead";

[0007] (5) High labor intensity. Since the installation and withdrawal of single hydraulic props and hinged top beams are frequent and all done by manpower, the working surface requires many people and the labor intensity is high.

[0008] (6) High cost and poor safety. Due to the high pressure of the top plate or other reasons such as operation, the damage to the pillars, hinged top beams and column shoes is relatively large. In addition, the process is complicated and there are many manual operations, which increases the probability of accidents. Utility Model Content

[0009] The purpose of the utility model is to provide a frameless support structure for the exit of a steeply inclined working surface, so as to solve the technical problems in the above-mentioned prior art such as the difficulty of frameless support, low support strength and difficulty in matching support width.

[0010] The technical solution adopted by the utility model to solve its technical problems is:

[0011] A frameless section support structure for the lower exit of a steeply inclined working face, comprising a first working face support and a tunnel end support, a frameless section support device being provided between the first working face support and the tunnel end support, the frameless section support device comprising: a base and a top beam, four telescopic columns being provided between the base and the top beam, with two columns forming a group in the length direction, a shielding beam being provided between two groups of the telescopic columns, the bottom of the shielding beam being connected to the base via a front connecting rod and a rear connecting rod, a tail beam being hinged at the tail of the top beam, the tail beam being telescopically extended by a tail beam jack, a telescopic beam being provided on the top beam via a telescopic beam jack, side beams being hinged on both sides of the top beam in the width direction, the side beams being telescopically extended by side beam jacks.

[0012] The utility model provides a frameless support structure for the lower exit of a steeply inclined working surface. A frame shifting jack is provided on one side of the base. One end of the frame shifting jack is connected to the base, and the other end of the frame shifting jack is connected to a pushing device, and the pushing device is connected to a conveyor pushing ear seat.

[0013] The utility model provides a frameless section support structure for the lower exit of a steeply inclined working face, wherein a stabilizing frame device is provided between the first frame of the working face support and the frameless section support device, and the stabilizing frame device includes a first stabilizing frame device and a second stabilizing frame device, wherein the first stabilizing frame device is arranged between the top beam and the top beam of the first frame of the working face support, and the second stabilizing frame device is arranged between the base and the base of the first frame of the working face support.

[0014] The utility model provides a frameless support structure for the lower exit of a steeply inclined working surface, wherein the number of the second stabilizing frame devices is two, which are respectively arranged at both ends of the base in the length direction.

[0015] The utility model provides a frameless support structure for the lower outlet of a steeply inclined working surface, wherein the width distance between the two groups of telescopic columns is smaller than the width spacing between the columns of the first frame of the working surface support.

[0016] The utility model provides a frameless support structure for the lower exit of a steeply inclined working surface, wherein the shield beam, the front connecting rod, the rear connecting rod and the base form a single four-link structure.

[0017] The beneficial effects of the present invention are as follows: a support structure for the frameless section at the outlet of a steeply inclined working surface is proposed, and the overall width of the lower part of the frameless section support device is smaller through a two-column single front and single rear telescopic column distribution structure, thereby occupying a smaller bottom space; through the arrangement of side beams, tail beams and telescopic beams on both sides, and the aforementioned structures can be telescoped, thereby adapting to changes in the length and width of the frameless section, solving the problem of large changes in the width of the frameless section, and forming a complete whole with the top beam in the fully open state, supporting the top plate over a large area, thereby realizing full-section support of the top plate of the frameless section at the outlet of the steeply inclined working surface; by arranging a frame shifting jack, automatic forward movement of the support device is realized, and mechanized operation of the outlet under the working surface is realized, which is safe, efficient and low in labor intensity; by arranging a frame stabilizing device, the problem of unstable state of the support of the steeply inclined working surface is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of a frameless segment support device according to an embodiment of the present utility model;

[0021] Figure 3 This is a side view of a frameless segment support device according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the arrangement of a stabilizing device according to an embodiment of the present utility model;

[0023] Figure 5 This is a diagram of the retracted state of the frameless segment support device of an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] like Figure 1-5As shown, a frameless support structure for the lower exit of a steeply inclined working face includes a first frame 500 of the working face support and a tunnel end support 700. A frameless support device is provided between the first frame 500 of the working face support and the tunnel end support 700. The frameless support device includes: a base 100 and a top beam 300. Four telescopic columns 200 are provided between the base 100 and the top beam 300. Two telescopic columns 200 form a group in the length direction. A shielding beam 400 is provided between the top beam 300, and the bottom of the shielding beam 400 is connected to the base 100 through a front connecting rod 410 and a rear connecting rod 420. The tail of the top beam 300 is hinged with a tail beam 320, and the tail beam 320 is telescopic by a tail beam jack 321. The top beam 300 is provided with a telescopic beam 310 through a telescopic beam jack 311. Side beams 800 are hinged on both sides of the width direction of the top beam 300, and the side beams 800 are telescopic by side beam jacks 810.

[0026] It should be noted that the telescopic beam 310 is installed in the front box of the top beam 300 and is controlled by the telescopic beam jack 311 to freely extend and retract, thus providing roof support. The side beams 800 are installed on the width side of the top beam 300 and are controlled by the side beam jack 810 to freely extend and retract, adapting to changes in the distance between the front end of the end support top beam and the support device, thereby meeting changes in the width of the non-framed section. The tail beam 320 is installed at the rear end of the top beam 300 and is controlled by the tail beam jack 321 to freely flip, thus providing additional support for the rear end of the top beam 300. When the telescopic beam 310, side beam 800, and tail beam 320 are fully opened, they form a complete whole with the top beam 300, providing large-area support for the roof, thus achieving full-section roof support for the non-framed section at the lower exit of the steeply inclined working face.

[0027] In a preferred embodiment of the present invention, a frame shifting jack 110 is provided on one side of the base 100. One end of the frame shifting jack 110 is connected to the base 100, and the other end of the frame shifting jack 110 is connected to a pushing device 120, which is in turn connected to a conveyor pusher lug. It should be noted that one end of the pushing device 120 is connected to the conveyor pusher lug, and the other end is connected to the frame shifting jack 110. The other end of the frame shifting jack 110 is connected to the base 100 of the support device. The conveyor pusher lug and the support device support each other, and automatic forward movement of the support device is achieved by controlling the frame shifting jack 110.

[0028] In a preferred embodiment of the present invention, there is a stabilizing device between the first frame 500 of the working surface support and the frameless section support device, and the stabilizing device includes a first stabilizing device 610 and a second stabilizing device 620. The first stabilizing device 610 is arranged between the top beam 300 and the top beam of the first frame 500 of the working surface support, and the second stabilizing device 620 is arranged between the base 100 and the base of the first frame 500 of the working surface support.

[0029] In a preferred embodiment of the present invention, there are two second stabilizing devices 620 , which are respectively disposed at both ends of the base 100 in the length direction.

[0030] It should be noted that the top beam 300 and base 100 of the support device are each equipped with a stabilizing device. There are three sets of stabilizing devices in total: one set for the top beam, namely the first stabilizing device 610, and two sets at the front and rear of the base, namely the second stabilizing device 620. The stabilizing devices are used in conjunction with the first frame 500 of the working face to prevent the support device from falling or sliding in the unsupported section, thereby meeting the requirements for emergency use in tilted fully-mechanized mining working faces.

[0031] In a preferred embodiment of the present invention, the width distance between the two groups of telescopic columns 200 is smaller than the width spacing between the columns of the first frame 500 of the work surface support.

[0032] In a preferred embodiment of the present invention, the shielding beam 400 , the front connecting rod 410 , the rear connecting rod 420 and the base 100 form a single four-link structure.

[0033] It should be noted that through the above structure, a smaller bottom width is achieved, and a larger support space is formed at the top after expansion and contraction, thereby solving the problem in the background technology that the working surface generally equipped with a horizontal end support has a reserved section of about 0.4-0.5m without a frame in this area, and the end support telescopic beam can be used for temporary support; but in the actual mining process, in order to facilitate the control of the equipment's downward movement, this area is generally about 2m, and the width is inconsistent with the advancement of the working surface, and even the problem of the head frame and the end frame "butting against each other" occurs.

[0034] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A support structure without frame section under the exit of a steeply inclined working face, characterized in that: The invention comprises a first working face support frame (500) and a tunnel end support frame (700), wherein a non-frame segment support device is provided between the first working face support frame (500) and the tunnel end support frame (700), wherein the non-frame segment support device comprises: a base (100) and a top beam (300), wherein four telescopic columns (200) are provided between the base (100) and the top beam (300), wherein two columns form a group in the length direction, and a shield beam (400) is provided between two groups of telescopic columns (200), wherein the shield beam (400) The bottom of the beam (400) is connected to the base (100) via a front connecting rod (410) and a rear connecting rod (420); a tail beam (320) is hingedly connected to the tail of the top beam (300); the tail beam (320) is telescopically extendable via a tail beam jack (321); a telescopic beam (310) is provided on the top beam (300) via a telescopic beam jack (311); side beams (800) are hingedly connected to both sides of the top beam (300) in the width direction; the side beams (800) are telescopically extendable via side beam jacks (810).

2. The support structure without frame section at the bottom exit of a steeply inclined working face according to claim 1 is characterized in that: A frame shifting jack (110) is provided on one side of the base (100), one end of the frame shifting jack (110) is connected to the base (100), and the other end of the frame shifting jack (110) is connected to a pushing device (120), and the pushing device (120) is connected to a conveyor pushing lug seat.

3. The support structure without frame section at the bottom exit of a steeply inclined working face according to claim 1 is characterized in that: A stabilizing device is provided between the first frame (500) of the working surface support and the frameless section support device, the stabilizing device comprising a first stabilizing device (610) and a second stabilizing device (620), the first stabilizing device (610) being arranged between the top beam (300) and the top beam of the first frame (500) of the working surface support, and the second stabilizing device (620) being arranged between the base (100) and the base of the first frame (500) of the working surface support.

4. The support structure without frame section at the bottom exit of a steeply inclined working face according to claim 3 is characterized in that: The number of the second stabilizing frame devices (620) is two, which are respectively arranged at two ends of the base (100) in the length direction.

5. The support structure without frame section at the bottom exit of a steeply inclined working face according to claim 1 is characterized in that: The width distance between the two groups of telescopic columns (200) is smaller than the width spacing between the columns of the first frame (500) of the work surface support.

6. The support structure without frame section at the bottom exit of a steeply inclined working face according to claim 1 is characterized in that: The shield beam (400), the front connecting rod (410), the rear connecting rod (420) and the base (100) form a single four-link structure.

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