Auxiliary frame pulling mechanism for mining waste rock blocking support

Abstract

The utility model relates to an auxiliary frame pulling mechanism for a mining waste rock blocking support, and belongs to the technical field of fully-mechanized coal mining supporting. The device is arranged between a waste rock blocking support front base and an end support rear base and comprises a ship-shaped base plate and two pulling frame assemblies, the ship-shaped base plate is arranged at the lower end of the waste rock blocking support front base, and the ship-shaped base plate is connected with the end support rear base through a first round-link chain; the two sets of pulling frame assemblies are arranged on the waste rock blocking side and the kneading mold side of the waste rock blocking support respectively, each pulling frame assembly comprises a connector, an auxiliary pulling frame jack and a second round-link chain, and the connectors are arranged at the rear base of the end support and connected with the front base of the waste rock blocking support through the auxiliary pulling frame jacks and the second round-link chains; the problems that the bottom of the gangue blocking support is pricked and the support is difficult to move under the soft bottom plate condition are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of comprehensive coal mining support, and particularly relates to an auxiliary support pulling mechanism for a mine waste rock retaining support. Background Art

[0002] China is rich in coal reserves and is a major coal producer. The protective coal pillars left in traditional mining will cause waste of resources. With the improvement of the requirement for coal recovery rate, gob-side entry retaining can maximize the recovery of resources, avoid coal body loss, and save a large amount of tunneling costs and tunneling time at the same time.

[0003] In recent years, with the continuous progress of comprehensive mining technology, the state has paid more and more attention to the safe mining and mining rate of coal mines, and the requirements for gob-side entry retaining masonry in underground mining will also become higher. For some working faces with complex geological conditions, the floor in the roadway is relatively soft and there may be accumulated water. At this time, the waste rock retaining support is likely to sink into the bottom in the roadway, and it becomes extremely difficult to move the support at this time, which will seriously affect the masonry speed and the working face advancing speed, and affect coal mine production. At the same time, the wet and soft floor may cause the waste rock retaining support to tilt or even overturn, affecting underground safety. Content of the Utility Model

[0004] The utility model overcomes the deficiencies of the prior art and provides an auxiliary support pulling mechanism for a mine waste rock retaining support, which solves the problems of the waste rock retaining support sinking into the bottom and difficult support moving under the condition of a soft floor.

[0005] In order to achieve the above purpose, the utility model is realized by the following technical solutions.

[0006] An auxiliary support pulling mechanism for a mine waste rock retaining support is arranged between the front base of the waste rock retaining support and the rear base of the end support, and includes a boat-shaped backing plate and two groups of support pulling components. The boat-shaped backing plate is arranged at the lower end of the front base of the waste rock retaining support, and the boat-shaped backing plate is connected to the rear base of the end support through a first round link chain; the two groups of support pulling components are respectively arranged on the waste rock retaining side and the kneading die side of the waste rock retaining support. The support pulling component includes a connecting head, an auxiliary support pulling jack, and a second round link chain. The connecting head is arranged at the rear base of the end support, and the connecting head is connected to the front base of the waste rock retaining support through the auxiliary support pulling jack and the second round link chain.

[0007] Further, the boat-shaped backing plate includes a horizontal plate and an inclined plate. Both the horizontal plate and the inclined plate are square plate-shaped structures. The front end of the inclined plate is upturned, and the rear end of the inclined plate is fixedly connected to the front end of the horizontal plate; the horizontal plate of the boat-shaped backing plate is arranged at the lower end of the front base of the waste rock retaining support.

[0008] Further, a reinforcing plate is fixedly arranged in the middle of the upper end surface of the boat-shaped backing plate. The reinforcing plate is located in the vertical plane in the front-rear direction, and the lower end of the reinforcing plate is fixedly connected to the upper end surfaces of the horizontal plate and the inclined plate.

[0009] Furthermore, a row of fixing holes is provided at the front end of the inclined section of the ship-shaped pad; a first circular link chain is respectively provided at the rear ends of the left and right end faces of the rear base of the end bracket, and the front ends of the two first circular link chains are respectively fixedly connected to the left and right end faces of the rear base of the end bracket through pins, and the rear ends of the two first circular link chains are respectively connected to the two fixing holes on the ship-shaped pad; the ship-shaped pad is connected to the rear base of the end bracket through the two first circular link chains.

[0010] Furthermore, two left-right symmetrical connecting heads are rotatably arranged at the rear end surface of the rear base of the end bracket, and the rotation axis of the connecting heads is horizontally arranged along the left-right direction.

[0011] Furthermore, an auxiliary pulling frame jack and a second circular link chain are respectively arranged between each connecting head and the left and right ends of the front end surface of the front base of the rock retaining support. One end of the piston rod of the auxiliary pulling frame jack is rotatably connected to the connecting head through a pin shaft, one end of the cylinder bottom of the auxiliary jack is fixedly connected to the front end of the second circular link chain, and the rear end of the second circular link chain is fixedly connected to the front end surface of the front base of the rock retaining support.

[0012] The beneficial effects of the utility model compared with the prior art are:

[0013] The general gob-side tunnel support equipment does not have an auxiliary pulling device reserved and installed. When the bottom plate of the underground tunnel is soft, the front of the base of the slag retaining support will hit the bottom, which will cause the slag retaining support to be stuck in the tunnel and difficult to move, affecting the production progress and safety of the coal mine. This auxiliary pulling device is set up to make the front base of the slag retaining support rest on the ship-shaped pad (the area of the ship-shaped pad is large), increasing the force area on the bottom plate, so that the front of the slag retaining support base is not easy to hit the bottom; at the same time, the slag retaining support and the end support base support are softly connected. When the slag retaining support is moved, the auxiliary pulling jack uses the end support as the fulcrum to apply a pulling force to the slag retaining support (increasing the slag retaining support moving force) to assist the slag retaining support to move forward. The auxiliary pulling device can effectively solve the problem of the slag retaining support hitting the bottom and the difficulty of moving the frame under soft bottom conditions, and ensure the production progress and tunnel retention progress of the mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a side view of the utility model as a whole;

[0016] Figure 2 It is a top view between the ship-shaped pad and the front base of the slag retaining bracket and the rear base of the end bracket;

[0017] Figure 3 It is a top view between the pull frame assembly and the front base of the rock retaining support and the rear base of the end support;

[0018] Among them, 1 is a boat-shaped backing plate, 2 is an auxiliary roof support jack, 3 is a first round link chain, 4 is a connector, 5 is a pin shaft, 6 is a second round link chain, 7 is the front base of the gob shield support, and 8 is the rear base of the end support. Specific implementation mode

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more obvious, the present utility model will be further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. The technical solutions of the present utility model will be described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0020] Such as Figure 1 As shown in FIG. -3, the present utility model provides a mining gob shield support auxiliary roof support mechanism, which is arranged between the front base 7 of the gob shield support and the rear base 8 of the end support, and includes a boat-shaped backing plate 1 and a roof support assembly.

[0021] The boat-shaped backing plate 1 includes a horizontal plate and an inclined plate. Both the horizontal plate and the inclined plate are square plate-shaped structures. The front end of the inclined plate tilts upward, and the rear end of the inclined plate is fixedly connected to the front end of the horizontal plate. A reinforcing plate is fixedly arranged in the middle of the upper end surface of the boat-shaped backing plate 1. The reinforcing plate is located in the vertical plane in the front-rear direction, and the lower end of the reinforcing plate is fixedly connected to the upper end surfaces of the horizontal plate and the inclined plate, so as to strengthen the overall strength of the boat-shaped backing plate 1 through the reinforcing plate.

[0022] The horizontal plate of the boat-shaped backing plate 1 is arranged at the lower end of the front base 7 of the gob shield support.

[0023] A row of fixing holes is arranged at the front end of the inclined section of the boat-shaped backing plate 1. A first round link chain 3 is respectively arranged at the rear ends of the left and right side end faces of the rear base 8 of the end support. The front ends of the two first round link chains 3 are respectively fixedly connected to the left and right side end faces of the rear base 8 of the end support through pin shafts 5, and the rear ends of the two first round link chains 3 are respectively connected to two fixing holes on the boat-shaped backing plate 1. The boat-shaped backing plate 1 is connected to the rear base 8 of the end support through two first round link chains 3.

[0024] Two groups of roof support assemblies are arranged between the rear base 8 of the end support and the front base 7 of the gob shield support. The two groups of roof support assemblies are respectively arranged on the gob shield side and the kneading die side of the gob shield support. The roof support assembly includes a connector 4, an auxiliary roof support jack 2, and a second round link chain 6.

[0025] At the rear end face of the rear base 8 of the end support, two symmetrically arranged connectors 4 are rotatably provided on the left and right. The rotation axis of the connector 4 is horizontally arranged along the left and right directions. Between the front end faces of the left and right ends of each connector 4 and the front base 7 of the gob-side support, an auxiliary hydraulic support jack 2 and a second round link chain 6 are respectively provided. One end of the piston rod of the auxiliary hydraulic support jack 2 is rotatably connected to the connector 4 through a pin shaft 5. One end of the cylinder bottom of the auxiliary jack is fixedly connected to the front end of the second round link chain 6. The rear end of the second round link chain 6 is fixedly connected to the front end face of the front base 7 of the gob-side support.

[0026] The gob-side support for gob-side entry retaining is divided into a gob-side and a kneading side. The gob-side and the kneading side push each other to move forward step by step. Therefore, the installation positions of the hydraulic support pulling components are reserved on the front bases of both the gob-side and the kneading side. At the same time, the installation positions of the hydraulic support pulling components are also reserved on the rear base 8 of the end support.

[0027] The said auxiliary hydraulic support mechanism takes the end support as the fulcrum. When the gob-side support on one side is moving its support, the auxiliary hydraulic support jack 2 retracts, applying a pulling force to the side of the gob-side support to be moved, increasing the force received during the support moving.

[0028] The first round link chain 3 should use an appropriate length to ensure that when the end support moves its support, the boat-shaped backing plate 1 is always located under the front base 7 of the gob-side support.

[0029] The front part of the said boat-shaped backing plate 1 warps upwards to ensure that it does not bury into the bottom during the pulling process; several first round link chains 3 can pass through the fixing blocks on the boat-shaped backing plate 1 on the warped inclined plate, ensuring that the gob-side support and the end support can also be connected when they are not in a straight line.

[0030] In the middle of the upper end face of the said boat-shaped backing plate 1, a reinforcing plate is welded. During use, the reinforcing plate of the boat-shaped backing plate 1 should always be between the front bases of the gob-side and the kneading side of the gob-side support, forming a limit for left and right movement, ensuring that the front part of the front base 7 of the gob-side support always rests on the boat-shaped backing plate 1 without falling off.

[0031] When the gob-side support moves its support, the pushing jack and the auxiliary hydraulic support jack 2 act simultaneously, providing a greater support moving force for the side to move the support; when the end support moves its support, it drives the boat-shaped backing plate 1 to move forward through the first round link chain 3; the front base 7 of the gob-side support rests on the boat-shaped backing plate 1, increasing the force-bearing area on the floor, enabling the front part of the gob-side support base to float on the soft floor. Through a greater support moving force and preventing the front part of the gob-side support from sinking into the bottom, the movement of the gob-side support under the roadway conditions of a soft floor is completed.

[0032] Adjust the distance between the gob shield and the end shield according to the lengths of the first ring chain 3 and the second ring chain 6. To address the problem of left-right offset between the gob shield and the end shield, connect the first ring chain 3 to different fixing blocks on the boat-shaped backing plate 1. Meanwhile, it is convenient for installation and disassembly and can be adjusted according to the actual situation of the underground working face. Installing and using the auxiliary hydraulic support pulling mechanism for the mine gob shield can effectively solve the problem of difficult hydraulic support moving in harsh geological conditions.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An auxiliary hydraulic prop pulling mechanism for a mine gangue retaining support is arranged between the front base (7) of the gangue retaining support and the rear base (8) of the end support, and is characterized in that: It includes a boat-shaped backing plate (1) and two groups of bracket pulling components. The boat-shaped backing plate (1) is arranged at the lower end of the front base (7) of the gob shield support. The boat-shaped backing plate (1) is connected to the rear base (8) of the end support through a first round link chain (3). The two groups of bracket pulling components are respectively arranged on the gob shielding side and the kneading die side of the gob shield support. The bracket pulling component includes a connecting head (4), an auxiliary bracket pulling jack (2), and a second round link chain (6). The connecting head (4) is arranged at the rear base (8) of the end support. The connecting head (4) is connected to the front base (7) of the gob shield support through the auxiliary bracket pulling jack (2) and the second round link chain (6).

2. The auxiliary hydraulic prop pulling mechanism of a mine waste rock retaining support according to claim 1, wherein: The boat-shaped backing plate (1) includes a horizontal plate and an inclined plate. Both the horizontal plate and the inclined plate are square plate-shaped structures. The front end of the inclined plate tilts upward, and the rear end of the inclined plate is fixedly connected to the front end of the horizontal plate. The horizontal plate of the boat-shaped backing plate (1) is arranged at the lower end of the front base (7) of the gob shield support.

3. The auxiliary hydraulic support pulling mechanism for a mine rock baffle support according to claim 2, characterized in that: A reinforcing plate is fixedly arranged in the middle of the upper end surface of the boat-shaped backing plate (1). The reinforcing plate is located in the vertical plane in the front-rear direction. The lower end of the reinforcing plate is fixedly connected to the upper end surfaces of the horizontal plate and the inclined plate.

4. The auxiliary hydraulic support pulling mechanism for a mine rock baffle support according to claim 2, characterized in that: A row of fixing holes is arranged at the front end of the inclined section of the boat-shaped backing plate (1). A first round link chain (3) is respectively arranged at the rear ends of the left and right side end faces of the rear base (8) of the end support. The front ends of the two first round link chains (3) are fixedly connected to the left and right side end faces of the rear base (8) of the end support through pins (5). The rear ends of the two first round link chains (3) are respectively connected to the two fixing holes on the boat-shaped backing plate (1). The boat-shaped backing plate (1) is connected to the rear base (8) of the end support through the two first round link chains (3).

5. The auxiliary hydraulic support pulling mechanism for a mine rock baffle support according to claim 1, characterized in that: Two symmetrically arranged connecting heads (4) are rotatably arranged at the rear end face of the rear base (8) of the end support. The rotation axis of the connecting head (4) is horizontally arranged along the left-right direction.

6. The auxiliary hydraulic support pulling mechanism for a mine rock baffle support according to claim 5, characterized in that: An auxiliary bracket pulling jack (2) and a second round link chain (6) are respectively arranged between each connecting head (4) and the left and right ends of the front end face of the front base (7) of the gob shield support. One end of the piston rod of the auxiliary bracket pulling jack (2) is rotatably connected to the connecting head (4) through a pin (5). One end of the cylinder bottom of the auxiliary jack is fixedly connected to the front end of the second round link chain (6). The rear end of the second round link chain (6) is fixedly connected to the front end face of the front base (7) of the gob shield support.

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