Gob-side entry retaining end and gangue blocking support hydraulic connecting device and control method thereof

Abstract

The invention discloses a gob-side entry retaining end and gangue blocking support hydraulic connecting device which comprises an outer box body, an inner box body and a first reciprocating driving mechanism, the outer box body is fixed to a base of an end support, the inner box body is arranged in the outer box body in a sliding mode, and the inner box body is connected with a base of a blocking rod support through a second reciprocating driving mechanism; the driving end of the first reciprocating driving mechanism is fixed to the outer box body, and a base of the first reciprocating driving mechanism is fixed to the inner box body. The problem that a traditional connecting device is inconvenient to disassemble is solved. The control method adopting the hydraulic connecting device for the gob-side entry retaining end and the gangue blocking support is safe, efficient, flexible and convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of construction equipment for gob-side entry retaining, and particularly relates to a hydraulic connecting device for a gob-side entry retaining end and a gangue blocking support, and a control method for the hydraulic connecting device. BACKGROUND

[0002] Gob-side entry retaining technology is a key technology for improving the recovery rate of coal resources and optimizing the effect of roadway maintenance, and one of its core equipments is a gangue blocking support. In the process of field application of the gangue blocking support, the state of the support will be affected due to the change of the coal seam inclination, which directly affects the pouring position of the flexible mold concrete wall, and thus affects the effect of entry retaining. Especially for inclined coal seams, because the inclination of the coal seam is large, the floor of the end region is required to be high on one side and low on the other side due to the requirements of the mining process, the end support is prone to slide to the lower side, and then the gangue blocking support connected thereto is also displaced. In order to cope with the displacement, the existing method is to set a plurality of detachable pins between the gangue blocking support and the end support, and once the displacement is detected, the gangue blocking support is repositioned by adjusting the fixed position of the hole bolt. However, such adjustment operation faces significant difficulties: the underground working environment itself will greatly limit the construction, and in the process of sliding of the end support, the pin plate installed between the gangue blocking support and the end support will bear a large shear stress, resulting in a large friction force between the pin and the pin plate. In this working condition, it is extremely difficult to rely on manual disassembly, which is not only time-consuming and laborious, but also accompanied by high safety risks. Therefore, the current structure design has the disadvantages of great construction difficulty, low flexibility and high safety risks, which seriously restricts the underground mining progress and the entry retaining quality. SUMMARY

[0003] The purpose of the present application is to provide a hydraulic connecting device for a gob-side entry retaining end and a gangue blocking support, which solves the problem of inconvenient disassembly of the connecting device between the traditional end support and the gangue blocking support.

[0004] In order to achieve the above-mentioned purpose, the first technical solution adopted by the present application is: a hydraulic connecting device for a gob-side entry retaining end and a gangue blocking support, comprising an outer box body, an inner box body and a first reciprocating driving mechanism, the outer box body is fixed on the base of the end support, the inner box body is slidably arranged in the outer box body, and the inner box body is connected together with the base of the gangue blocking support through a second reciprocating driving mechanism; the driving end of the first reciprocating driving mechanism is fixed on the outer box body, and the base of the first reciprocating driving mechanism is fixed on the inner box body.

[0005] The technical solution of the present application also has the following characteristics: One side of the inner box body is provided with an upper steel plate and a lower steel plate, the upper steel plate and the lower steel plate are connected with the base of the second reciprocating driving mechanism, and the driving end of the second reciprocating driving mechanism is connected with the base of the gangue blocking support.

[0006] The first reciprocating driving mechanism is a hydraulic oil cylinder.

[0007] The second reciprocating driving mechanism is a hydraulic oil cylinder.

[0008] The outer box body is provided with a through outer pin hole on the side close to the roadway, and the outer pin shaft extends into the outer pin hole to fix the telescopic rod of the first reciprocating driving mechanism.

[0009] The outer box body is provided with an avoidance pin opening on the side close to the other side.

[0010] The inner box body is provided with a through inner pin hole on the side close to the goaf, and the inner pin shaft extends into the inner pin hole to fix the cylinder body of the first reciprocating driving mechanism.

[0011] Another technical solution adopted by the present application is to provide a control method of a hydraulic connection device of a gob-side entry retaining end and a gangue blocking support, comprising the following steps: Step 1, confirming the initial connection state of the end support and the gangue blocking support, checking whether the hydraulic pump station, the explosion-proof control valve group and the hydraulic circuit of the first reciprocating driving mechanism are intact; Step 2, when the end support slides laterally due to the advancing of the working face and drives the gangue blocking support to deviate, the operator is located in a safe position and remotely starts the hydraulic control system; Step 3, starting the hydraulic pump station, operating the explosion-proof control valve group to supply oil to the first reciprocating driving mechanism, controlling the driving end to extend or retract; the first reciprocating driving mechanism transmits driving force to the outer box body and the inner box body through the outer pin shaft and the inner pin shaft, and pushes the inner box body to slide axially along the outer box body; Step 4, the inner box body drives the gangue blocking support to move as a whole through the second reciprocating driving mechanism, and adjusts the lateral position in real time until the gangue blocking support returns to the preset supporting position; Step 5, after the position adjustment is completed, stopping the hydraulic oil supply, releasing the system pressure, and the first reciprocating driving mechanism remains position self-locking, so that the whole connection device is in a stable state; Step 6, confirming that the position of the gangue blocking support meets the design requirements, checking that there is no abnormality in each connection node and hydraulic component, and then the system enters standby state.

[0012] The beneficial effects of the present application are that the hydraulic connection device of the gob-side entry retaining end and the gangue blocking support is used to timely adjust the position of the gangue blocking support when the end support in the coal mine underground deviates laterally, so that it is not affected by the lateral deviation, and the device effectively solves the problems of difficult operation, low efficiency and high safety risk of the traditional mechanical pin shaft connection mode when relying on manual disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram illustrating the application of the hydraulic connection device between the end of the goaf retaining roadway and the rock retaining support of the present invention.

[0014] Figure 2 This is a schematic diagram of the hydraulic connection device between the end of the goaf retaining roadway and the rock retaining support of the present invention when it is extended.

[0015] Figure 3 This is a schematic diagram of the structure of the hydraulic connection device between the end of the goaf retaining roadway and the rock retaining support of the present invention when it is extended.

[0016] In the figure, 1. Outer housing; 2. First reciprocating drive mechanism; 3. Inner housing; 4. Upper steel plate; 5. Second reciprocating drive mechanism; 6. Lower steel plate; 7. Stop bar bracket; 8. End bracket; 9. Outer pin hole; 10. Avoiding pin opening; 11. Inner pin opening. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0019] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0020] Example 1 like Figure 1 As shown, the hydraulic connection device between the end of the goaf retaining roadway and the retaining rock support of the present invention includes an outer housing 1, an inner housing 3 and a first reciprocating drive mechanism 2. The outer housing 1 is fixed on the base of the end support 8, and the inner housing 3 is slidably disposed in the outer housing 1. The inner housing 3 is connected to the base of the retaining rod support 7. The drive end of the first reciprocating drive mechanism 2 is fixed on the outer housing 1, and the base of the first reciprocating drive mechanism 2 is fixed on the inner housing 3.

[0021] The inner box 3 is nested in the outer box 1, and the two constitute a sliding pair that can be axially extended and retracted. This set structure can accurately constrain the oil cylinder to move only in the axial direction, effectively avoiding the oil cylinder bearing partial load, and at the same time completely wrapping the oil cylinder, forming a full circumferential protection for the oil cylinder piston rod and cylinder body, effectively preventing the well from being damaged by falling gangue or coal dust intrusion, greatly improving the working reliability and service life of the equipment in harsh underground.

[0022] As shown in Figure 2 and Figure 3 When the working face is inclined, the advancing end support 8 may slide laterally and cause the gangue blocking support 7 to deviate from the predetermined position, and the operator operates in a safe position through a remote hydraulic control system. Start the hydraulic pump station, control the explosion-proof control valve group, and provide pressure oil to the first reciprocating drive mechanism 2. The hydraulic oil cylinder drives its driving end to extend or retract according to the instruction. The thrust or tension of the first reciprocating drive mechanism 2 is transmitted to the outer box 1 and the inner box 3 through the outer pin shaft and the inner pin shaft respectively. The outer box 1 is fixed, and the movement of the first reciprocating drive mechanism 2 will force the inner box 3 to extend or retract relative to the outer box 1. The inner box 3 drives the gangue blocking support 7 to move as a whole, thereby accurately adjusting its position on the working face and restoring it to the correct support position. After the position is adjusted, the hydraulic pressure is released, and the entire system remains in a new stable state.

[0023] Example 2 As shown in Figure 1 The same as example 1, the along-gob roadway end and gangue blocking support hydraulic connection device of the present application in example 2 also includes an outer box 1, an inner box 3 and a first reciprocating drive mechanism 2, the outer box 1 is fixed on the base of the end support 8, the inner box 3 is slidably arranged in the outer box 1, and the inner box 3 and the base of the gangue blocking support 7 are connected together; the driving end of the first reciprocating drive mechanism 2 is fixed on the outer box 1, and the base of the first reciprocating drive mechanism 2 is fixed on the inner box 3.

[0024] Different from example 1, in the along-gob roadway end and gangue blocking support hydraulic connection device of the present application in example 2, one side of the inner box 3 is provided with an upper steel plate 4 and a lower steel plate 6, the upper steel plate 4 and the lower steel plate 6 are connected with the base of the second reciprocating drive mechanism 5, and the driving end of the second reciprocating drive mechanism 5 is connected with the base of the gangue blocking support 7.

[0025] The inner box 3 is hinged with the ear seat of the oil cylinder 5 of the gangue blocking support 7 through the upper steel plate 4 and the lower steel plate 6 welded on the outer wall of the inner box 3, so as to transmit the thrust or tension of the oil cylinder to the gangue blocking support 7.

[0026] As shown in Figure 2 and Figure 3When the working face is inclined, the advancing end support 8 may slide laterally and cause the gangue blocking support 7 to deviate from the predetermined position. The operator operates the remote hydraulic control system from a safe position. The hydraulic pump station is started, the explosion-proof control valve group is controlled, and pressure oil is supplied to the first reciprocating drive mechanism 2. The hydraulic oil cylinder drives its driving end to extend or retract according to the instruction. The thrust or pull of the first reciprocating drive mechanism 2 is transmitted to the outer box body 1 and the inner box body 3 through the outer pin shaft and the inner pin shaft, respectively. The outer box body 1 is fixed, and the movement of the first reciprocating drive mechanism 2 will force the inner box body 3 to extend or retract relative to the outer box body 1. The inner box body 3 moves the gangue blocking support 7 as a whole, thereby accurately adjusting its position on the working face and restoring it to the correct support position. After the position is adjusted, the hydraulic pressure is released, and the entire system remains in a new stable state.

[0027] Example 3 As Figure 1 shown, the same as example 2, the hydraulic connection device of the gob-side entry retaining end and the gangue blocking support of the present application in example 3 also includes an outer box body 1, an inner box body 3 and a first reciprocating drive mechanism 2. The outer box body 1 is fixed to the base of the end support 8, the inner box body 3 is slidably arranged in the outer box body 1, and the inner box body 3 and the base of the gangue blocking support 7 are connected together. The driving end of the first reciprocating drive mechanism 2 is fixed to the outer box body 1, and the base of the first reciprocating drive mechanism 2 is fixed to the inner box body 3. The inner box body 3 is provided with an upper steel plate 4 and a lower steel plate 6 on one side, and the upper steel plate 4 and the lower steel plate 6 are connected with the base of the second reciprocating drive mechanism 5. The driving end of the second reciprocating drive mechanism 5 is connected with the base of the gangue blocking support 7.

[0028] Different from example 2, in the hydraulic connection device of the gob-side entry retaining end and the gangue blocking support of the present application in example 3, the outer box body 3 is provided with a through outer pin hole 9 on the side close to the roadway, and the outer pin shaft extends into the outer pin hole to fix the telescopic rod 201 of the first reciprocating drive mechanism 2. The inner box body 3 is provided with a through inner pin hole 11 on the side close to the goaf, and the inner pin shaft extends into the inner pin hole 11 to fix the cylinder body 201 of the first reciprocating drive mechanism 2. It is more convenient to disassemble and assemble.

[0029] As Figure 2 and Figure 3As shown, when the working face is inclined, the advancing end support 8 may slide laterally and cause the gangue blocking support 7 to deviate from the predetermined position, and the operator operates in a safe position through a remote hydraulic control system. Start the hydraulic pump station, control the explosion-proof control valve group, and provide pressure oil to the first reciprocating drive mechanism 2. The hydraulic oil cylinder drives its driving end to extend or retract according to the instruction. The thrust or pull of the first reciprocating drive mechanism 2 is transmitted to the outer box 1 and the inner box 3 through the outer pin shaft and the inner pin shaft respectively. The outer box 1 is fixed, and the movement of the first reciprocating drive mechanism 2 will force the inner box 3 to extend or retract relative to the outer box 1. The inner box 3 drives the gangue blocking support 7 to move as a whole, thereby accurately adjusting its position on the working face and restoring it to the correct support position. After the position is adjusted, the hydraulic pressure is released, and the entire system remains in a new stable state.

[0030] Example 4 As Figure 1 shown, the same as example 3, the hydraulic connection device of the gob-side entry retaining end and the gangue blocking support of the present application in example 4 also includes an outer box 1, an inner box 3 and a first reciprocating drive mechanism 2. The outer box 1 is fixed to the base of the end support 8, the inner box 3 is slidably arranged in the outer box 1, and the inner box 3 is connected with the base of the gangue blocking support 7 together. The driving end of the first reciprocating drive mechanism 2 is fixed on the outer box 1, and the base of the first reciprocating drive mechanism 2 is fixed on the inner box 3. One side of the inner box 3 is provided with an upper steel plate 4 and a lower steel plate 6, and the upper steel plate 4 and the lower steel plate 6 are connected with the base of the second reciprocating drive mechanism 5. The driving end of the second reciprocating drive mechanism 5 is connected with the base of the gangue blocking support 7. The outer box 3 is provided with a through outer pin hole 9 near the side of the roadway, and the outer pin shaft extends into the outer pin hole to fix the telescopic rod 201 of the first reciprocating drive mechanism 2. The inner box 3 is provided with a through inner pin hole 11 near the side of the goaf, and the inner pin shaft extends into the inner pin hole 11 to fix the cylinder body 201 of the first reciprocating drive mechanism 2.

[0031] As Figure 2 shown, the difference between example 3 and example 4 is that in the hydraulic connection device of the gob-side entry retaining end and the gangue blocking support of the present application in example 4, the outer box 3 is provided with an avoidance pin hole 10 near the other side. The avoidance pin hole 10 provides space for the retraction of the inner pin shaft, ensuring that the inner box 3 does not interfere with the inner pin shaft when it is driven to extend or retract relative to the outer box 1, and ensuring smooth operation.

[0032] When installation is needed, the convex part 5 is inserted into the concave part 6 and fixed by inserting the pin shaft. When disassembly is needed, only the pin shaft needs to be disassembled. The component is easy to disassemble. When the first reciprocating drive mechanism 1 and the second reciprocating drive mechanism 2 are disassembled, the adjusting mechanism can be rotated and stored on both sides of the mold hanging device 3 around the hinge point of the mold hanging device 3, and fixed by the pin shaft, thereby realizing random use and movement.

[0033] AsFigure 2 As shown, when the width of the hanging die device 3 needs to be adjusted, one side of the hanging die device 3 is supported by the roof, and the other side is stretched by the first reciprocating driving mechanism 1 and the second reciprocating driving mechanism 2 under pressure or shrunk under pressure. When the first reciprocating driving mechanism 1 and the second reciprocating driving mechanism 2 are stretched or shrunk, the width adjustment of the middle and rear of the hanging die device 3 is realized. This adjustment method is simple and effective, and can realize the independent width adjustment of the rear frame, and enhance the stability of the hanging die device 3. When the hanging die device 3 needs to be adjusted laterally, the frame adjusting mechanism can be rotated around the hinge pin shaft connected to the hanging die device 3 to the two sides of the hanging die device 3, and the frame adjusting mechanism is vertically supported on the ground, realizing the lateral support of the hanging die device 3, and relying on the stretching and shrinking of the first reciprocating driving mechanism 1 and the second reciprocating driving mechanism 2 under pressure, the lateral frame of the hanging die device 3 is realized, so that the hanging die device 3 has the ability to move horizontally.

[0034] Example 5 As Figure 1 shown, unlike example 4, in example 5, the hydraulic connection device of the gob-side entry retaining end and the coal blocking support of the present application, the first reciprocating driving mechanism 2 and the second reciprocating driving mechanism 5 are preferably hydraulic oil cylinders.

[0035] Example 6 The control method of the hydraulic connection device of the gob-side entry retaining end and the coal blocking support of the present application is implemented according to the following steps: Step 1, pre-operation inspection: before any adjustment operation, the operator first checks the connection state of the end support 8 and the coal blocking support 7 remotely or on site, confirms that the appearance of the outer box body 1, the inner box body 3 and the first reciprocating driving mechanism 2 of the hydraulic connection device is normal, and confirms that the pump station, the explosion-proof valve group and the pipeline of the remote hydraulic control system are in good standby state; Step 2, slip determination and system start: when the working face advances and the end support 8 slips laterally due to uneven floor, and it is monitored that the coal blocking support 7 deviates from the preset support position, the operator retreats to a safe area and remotely starts the hydraulic control system; Step 3, hydraulic drive to execute frame adjustment: start the hydraulic pump station, control the explosion-proof control valve group to supply pressure oil to the first reciprocating driving mechanism 2 (i.e. the main frame adjusting oil cylinder), and control its driving end to extend or retract according to the slip direction; the thrust or pull generated by the first reciprocating driving mechanism 2 is transmitted through the outer pin shaft fixed on the outer box body 1 and the inner pin shaft fixed on the inner box body 3, and since the outer box body 1 is fixed, the driving force forces the inner box body 3 to slide along the outer box body 1 inside. Step 4, linkage adjustment and position correction: the sliding of the inner box 3 is pushed or pulled by the second reciprocating drive mechanism 5 (i.e. auxiliary connecting oil cylinder) hinged thereto, to push or pull the base of the gangue blocking support 7, so that the gangue blocking support 7 moves laterally as a whole, and the operator adjusts the oil cylinder stroke in real time through the observation system until the gangue blocking support 7 is accurately restored to the predetermined support position; Step 5, system locking and pressure release: after the position adjustment of the gangue blocking support 7 is completed, the explosion-proof valve group is controlled to cut off the oil circuit and release the hydraulic pressure in the first reciprocating drive mechanism 2, and the new position of the inner box 3 is maintained by the self-locking characteristics and mechanical structure of the hydraulic oil cylinder, so that the entire connecting device is in a stable state. Step 6, confirmation after adjusting the support: the support state of the gangue blocking support 7 is confirmed again to meet the design requirements, and after checking that there is no abnormal stress or leakage at each pin shaft connection point, box and hydraulic cylinder, the system enters standby state, and the adjusting operation is completed.

[0036] The above method realizes rapid, accurate and safe adjustment of the position of the gangue blocking support through remote hydraulic control, completely avoids high-intensity manual disassembly and installation operation in a dangerous environment, and significantly improves work efficiency and safety.

[0037] The above description shows and describes several preferred embodiments of the invention, but as mentioned above, it should be understood that the invention is not limited to the forms disclosed herein, should not be considered as excluding other embodiments, and can be used in various other combinations, modifications and environments, and can be modified within the scope of the inventive concept described herein by the above teachings or related technical or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the invention shall be within the protection scope of the claims of the invention.

Claims

1. A hydraulic connecting device for connecting a gob-side entry retaining end and a waste retaining support, characterized in that, The utility model relates to a kind of roadway end head support device, including outer box (1), inner box (3) and first reciprocating drive mechanism (2), the outer box (1) is fixed on the base of end head support (8), the inner box (3) is slidably arranged in the outer box (1), the inner box (3) is connected together with the base of baffle lever support (7) by second reciprocating drive mechanism (5);The driving end of the first reciprocating drive mechanism (2) is fixed on outer box (1), and the base of first reciprocating drive mechanism (2) is fixed on inner box (3).

2. The hydraulic connecting device between the gob-side entry retaining end and the waste rock retaining support according to claim 1, characterized in that, One side of the inner box (3) is provided with an upper steel plate (4) and a lower steel plate (6), and the upper steel plate (4) and the lower steel plate (6) are connected with the base of the second reciprocating drive mechanism (5), and the driving end of the second reciprocating drive mechanism (5) is connected with the base of the baffle lever support (7).

3. The hydraulic connecting device between the gob-side entry retaining end and the support for blocking and discharging waste rock according to claim 2, characterized in that, The first reciprocating drive mechanism (2) is a hydraulic oil cylinder.

4. The hydraulic connecting device between the gob-side entry retaining end and the support for blocking and discharging waste rock according to claim 3, characterized in that, The second reciprocating drive mechanism (5) is a hydraulic oil cylinder.

5. The hydraulic connecting device between the gob-side entry retaining end and the waste rock retaining support according to claim 4, characterized in that, The outer box (3) is provided with a through outer pin hole (9) near one side of the roadway, and an outer pin shaft extends into the outer pin hole to fix the telescopic rod (201) of the first reciprocating drive mechanism (2).

6. The hydraulic connecting device between the gob-side entry retaining end and the waste rock retaining support according to claim 5, characterized in that, The outer box (3) is provided with an avoidance pin opening (10) near the other side.

7. The hydraulic connecting device between the gob-side entry retaining end and the support for blocking and discharging waste rock according to claim 6, characterized in that, The inner box (3) is provided with a through inner pin hole (11) near one side of the goaf, and an inner pin shaft extends into the inner pin hole (11) to fix the cylinder body (201) of the first reciprocating drive mechanism (2).

8. The control method of the hydraulic connection device between the gob-side entry retaining end and the support for blocking and discharging waste rock according to any one of claims 1 to 7, characterized in that, The utility model relates to a kind of roadway end head support device, including the following steps: Step 1, confirm the initial connection state of end head support (8) and gangue blocking support (7), check whether hydraulic pump station, explosion-proof control valve group and the hydraulic circuit of first reciprocating drive mechanism (2) are intact; Step 2, when the working face advances to cause the lateral slippage of end head support (8) and drive gangue blocking support (7) to deviate, the operator is located in a safe position, and remotely starts the hydraulic control system; Step 3, start hydraulic pump station, control explosion-proof control valve group to supply oil to first reciprocating drive mechanism (2), control its driving end to extend or retract; first reciprocating drive mechanism (2) transmits driving force to outer box (1) and inner box (3) through outer pin shaft and inner pin shaft, and pushes inner box (3) to slide along outer box (1) in axial direction; Step 4, inner box (3) drives gangue blocking support (7) to move as a whole through second reciprocating drive mechanism (5), adjusts its lateral position in real time until gangue blocking support (7) returns to preset support position; Step 5, after position adjustment is in place, stop hydraulic oil supply, release system pressure, first reciprocating drive mechanism (2) keeps position self-locking, so that the whole connecting device is in stable state; Step 6, confirm that the position of gangue blocking support (7) meets the design requirements, check that each connection node and hydraulic component is normal, and then the system enters standby state.

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