Goaf gangue-hydraulic support collaborative bearing device

Abstract

The utility model discloses a goaf gangue-hydraulic support collaborative bearing device, which belongs to the technical field of mining support equipment and comprises a hydraulic support body, and an upper gangue blocking mechanism and a lower gangue blocking mechanism are arranged at the tail end of the hydraulic support body. The upper gangue blocking mechanism comprises a first supporting beam and a second supporting beam, and the first supporting beam and the second supporting beam are each provided with a reinforcing grouting pipe. The lower gangue blocking mechanism comprises a horizontal hydraulic cylinder, a vertical baffle, a telescopic plate and a reinforcing hydraulic cylinder, a feeding mechanism is arranged on the hydraulic support body, and a feeding pipe and a reinforcing grouting pipe on the telescopic plate are both connected with the feeding mechanism. The goaf is subjected to lower-layer gangue backfilling firstly, then slurry backfilling is carried out, the time interval of top-layer rock support missing is shortened, and the backfilling efficiency is improved. The inclined discharging roller is arranged at the position, opposite to the feeding port, of the conveying belt, gangue slides to the feeding port under the action of gravity and then is conveyed through the spiral conveyor, and energy consumption is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to mining support equipment technical field especially relates to a kind of gangue-hydraulic support collaborative bearing device in goaf. BACKGROUND

[0002] In the process of coal resources exploitation, a large amount of gangue will be produced, most of which is accumulated on the ground for many years to form gangue hill. If the gangue is not disposed reasonably, it will not only cause environmental pollution but also have certain safety hazards. In order to solve the problems of surface subsidence and gangue pollution, the gangue is backfilled into the goaf by backfilling. For example, the patent with the announcement number CN210919148U discloses a pneumatic gangue combined filling device. The hanging belt is fixed behind each hydraulic support for coal mine, and a high-pressure pneumatic power device is installed below the tail beam of each hydraulic support for coal mine to blow the gangue transported on the hanging belt into the goaf of the working face behind the tail beam of the support. The problem of full filling of the goaf is solved, the surface subsidence is reduced, and the lifting and transportation pressure is reduced. However, the following problems still exist: higher pressure gas is needed to blow the large particle gangue, which consumes a lot of energy, and dust problem will also occur during the blowing process. Moreover, it cannot be applied to the gangue slurry backfilling. SUMMARY

[0003] The utility model aims to provide a kind of gangue-hydraulic support collaborative bearing device in goaf, solve the above technical problems.

[0004] To achieve the above purpose, the utility model provides a kind of gangue-hydraulic support collaborative bearing device in goaf, including hydraulic support body, and the tail end of hydraulic support body is provided with upper gangue blocking mechanism and lower gangue blocking mechanism;

[0005] The upper gangue blocking mechanism includes a first support beam hinged to the main support beam, the first support beam is connected to the hydraulic support body through a support hydraulic cylinder, the first support beam is connected to a second support beam and is provided with an adjusting hydraulic cylinder, and the first support beam and the second support beam are both provided with a reinforced grouting pipe;

[0006] The lower gangue blocking mechanism includes a horizontal hydraulic cylinder, the horizontal hydraulic cylinder is connected to a vertical baffle, the vertical baffle is connected to an expansion plate through an expansion hydraulic cylinder, a reinforcing hydraulic cylinder is arranged on the expansion plate, a feeding mechanism is arranged on the hydraulic support body, and the feeding pipe and the reinforced grouting pipe on the expansion plate are connected to the feeding mechanism.

[0007] Preferably, the two ends of the second support beam are provided with a first sealing air bag and a second sealing air bag, the two sides of the second support beam, the two sides of the expansion plate and the two sides of the vertical baffle are all provided with a third sealing air bag, and the first sealing air bag, the second sealing air bag and the third sealing air bag are all connected to a sealing air pump.

[0008] Preferably, the second support beam bottom is provided with a limiting frame, and a limiting sliding groove of the limiting frame is arranged opposite to the telescopic end of the reinforcing hydraulic cylinder.

[0009] Preferably, the feeding mechanism comprises a slurry pump and a screw conveyor, the slurry pump is used for conveying the gangue slurry, the slurry pump is connected with the reinforcing grouting pipe, the screw conveyor is installed on the main support beam of the hydraulic support body, a feeding inlet of the screw conveyor is arranged opposite to the conveying belt conveying the gangue, and a discharging roller is arranged in a tilt manner at a position of the conveying belt opposite to the feeding inlet, so that the conveying belt at the position of the feeding inlet is arranged in a tilt manner, the gangue slides to the feeding inlet under the action of gravity, and an extension pipe is connected with an output pipe of the screw conveyor, the extension pipe is connected with the output pipe through an extension hydraulic cylinder, and a discharging end of the extension pipe is arranged between the two reinforcing hydraulic cylinders.

[0010] Preferably, a dust collector is arranged at the feeding inlet of the screw conveyor.

[0011] Therefore, the goaf-gangue-hydraulic support collaborative bearing device has the beneficial effects that: the goaf is backfilled with lower gangue first, then the slurry is backfilled to shorten the time interval of supporting the top rock, and the backfilling efficiency is improved. The conveying belt at the position of the feeding inlet is arranged in a tilt manner through the discharging roller arranged in a tilt manner at the position of the conveying belt opposite to the feeding inlet, the gangue slides to the feeding inlet under the action of gravity, and then is conveyed through the screw conveyor, energy consumption is small, and the dust collector is arranged to reduce dust generation.

[0012] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Fig. 3 is a structure schematic view of the goaf-gangue-hydraulic support collaborative bearing device when backfilling is completed according to the utility model;

[0014] Figure 2 Fig. 3 is a structure schematic view of the goaf-gangue-hydraulic support collaborative bearing device when backfilling is completed according to the utility model;

[0015] Figure 3 Fig. 4 is an assembly structure schematic view of the output pipe and the extension pipe according to the utility model;

[0016] Figure 4 Fig. 5 is a limiting frame structure schematic view according to the utility model.

[0017] REFERENCE NUMERALS

[0018] 1, hydraulic support body; 11, main support beam; 2, upper gangue blocking mechanism; 21, first support beam; 22, support hydraulic cylinder; 23, second support beam; 24, adjusting hydraulic cylinder; 25, reinforcing grouting pipe; 3, lower gangue blocking mechanism; 31, horizontal hydraulic cylinder; 32, vertical baffle; 33, telescopic plate; 34, reinforcing hydraulic cylinder; 35, feeding pipe; 4, feeding mechanism; 41, grout pump; 42, screw conveyor; 421, output pipe; 422, extension pipe; 423, extension hydraulic cylinder; 43, discharge roller; 44, dust collector; 5, first caulking air bag; 6, second caulking air bag; 7, third caulking air bag; 8, limiting frame; 81, limiting chute. DETAILED DESCRIPTION

[0019] In the description of the present application, it should be explained that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, it should be explained that, unless otherwise specified and limited, the terms "provided", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] The embodiments of the present application will be described in detail below with reference to the drawings.

[0021] As Figures 1-2 shown, a goaf gangue-hydraulic support cooperative bearing device, comprising a hydraulic support body 1, the tail end of the hydraulic support body 1 is provided with an upper gangue blocking mechanism 2 and a lower gangue blocking mechanism 3.

[0022] The upper gangue blocking mechanism 2 comprises a first support beam 21 hinged with the main support beam 11, the first support beam 21 is connected with the hydraulic support body 1 through a support hydraulic cylinder 22, the first support beam 21 is connected with a second support beam 23 and is provided with an adjusting hydraulic cylinder 24, and the first support beam 21 and the second support beam 23 are both provided with reinforcing grouting pipes 25.

[0023] The lower gangue blocking mechanism 3 comprises a horizontal hydraulic cylinder 31, a vertical baffle 32 connected to the horizontal hydraulic cylinder 31, an expansion plate 33 connected to the vertical baffle 32 through an expansion hydraulic cylinder, and a reinforcing hydraulic cylinder 34 arranged on the expansion plate 33. The hydraulic support body 1 is provided with a feeding mechanism 4. The feeding pipe 35 and the reinforcing grouting pipe 25 on the expansion plate 33 are connected to the feeding mechanism 4.

[0024] The first caulking air bag 5 and the second caulking air bag 6 are arranged at the two ends of the second support beam 23. The third caulking air bag 7 is arranged on the two sides of the second support beam 23, the two sides of the expansion plate 33 and the two sides of the vertical baffle 32. The first caulking air bag 5, the second caulking air bag 6 and the third caulking air bag 7 are connected to the sealing air pump.

[0025] The second support beam 23 is provided with a limiting frame 8 at the bottom. As shown in Figure 4 , the limiting sliding groove 81 of the limiting frame 8 is arranged opposite to the expansion end of the reinforcing hydraulic cylinder 34, so that the reinforcing hydraulic cylinder 34 will not affect the supporting effect during the movement of the water.

[0026] The feeding mechanism 4 comprises a slurry pump 41 and a screw conveyor 42. The slurry pump 41 is used to transport gangue slurry. The slurry pump 41 is connected to the reinforcing grouting pipe 25 and the feeding pipe 35. When the first support beam 21 and the second support beam 23 are in the horizontal supporting position, the upper layer of the goaf is grouted and reinforced through the reinforcing grouting pipe 25. Cement slurry or polyurethane slurry is used. Because the setting time of the materials is different, the slurry material used is determined according to the actual coal mining time.

[0027] The screw conveyor 42 is installed on the main support beam 11 of the hydraulic support body 1. The feeding port of the screw conveyor 42 is arranged opposite to the conveying belt for conveying gangue. A dust collector 44 is arranged at the feeding port of the screw conveyor 42. The discharge roller 43 is arranged inclined relative to the position of the feeding port, so that the conveying belt at the position of the feeding port is arranged inclined. The gangue falls into the feeding port under the action of gravity. The output pipe 421 of the screw conveyor 42 is connected to the lengthening pipe 422. As shown in Figure 3 , the lengthening pipe 422 is connected to the output pipe 421 through the lengthening hydraulic cylinder 423. The discharge end of the lengthening pipe 422 is arranged between the two reinforcing hydraulic cylinders 34.

[0028] The specific process is as follows:

[0029] The hydraulic support body 1 enters into the next station, and the adjusting hydraulic cylinder 24 is elongated, the first sealing air bag 5, the second sealing air bag 6 and the third sealing air bag 7 are exhausted, the second support beam 23 is converted from the inclined state to the horizontal state to support the top rock stratum, the telescopic plate 33 and the reinforcing hydraulic cylinder 34 are extended to reinforce the support of the second support beam 23, the lengthening hydraulic cylinder 423 is elongated, the spiral conveyor 42 is started to transfer the gangue (large pieces without crushing) to the goaf, the horizontal hydraulic cylinder 31 drives the vertical baffle 32 to reciprocate to compact and homogenize the gangue, when the gangue is filled to the top of the telescopic plate 33, the spiral conveyor 42 is closed, the lengthening hydraulic cylinder 423 is retracted to the initial position, the reinforcing hydraulic cylinder 34 and the adjusting hydraulic cylinder 24 are retracted, the second support beam 23 is arranged in the inclined state, the first sealing air bag 5, the second sealing air bag 6 and the third sealing air bag 7 are inflated to avoid the subsequent slurry from flowing out of the gap, the slurry supply pump 41 is started to backfill the slurry (a mixture of crushed gangue and other materials) to the goaf through the reinforcing grouting pipe 25 of the second support beam 23 and the feeding pipe 35 on the telescopic plate 33, and the backfilling body in the goaf is solidified. The first support beam 21 grouts and reinforces the top rock in the relative position through the reinforcing grouting pipe 25, so that the top rock does not fall during the interval time of moving the hydraulic support body 1 next time. The goaf is backfilled with the lower gangue first, and then the slurry is backfilled, so that the time interval of the top rock without support is shortened, and the backfilling efficiency is improved.

[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solutions of the present application can still be modified or replaced by the same, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A goaf gangue-hydraulic support collaborative bearing device, comprising a hydraulic support body, characterized in that: The hydraulic support body is equipped with an upper retaining rock mechanism and a lower retaining rock mechanism at its tail end; The upper retaining gangue mechanism includes a first support beam hinged to the main support beam. The first support beam is connected to the hydraulic support body through a support hydraulic cylinder. The first support beam is connected to a second support beam and is equipped with an adjustment hydraulic cylinder. Both the first and second support beams are equipped with reinforcing grouting pipes. The lower retaining gangue mechanism includes a horizontal hydraulic cylinder, which is connected to a vertical baffle. The vertical baffle is connected to a telescopic plate via a telescopic hydraulic cylinder. A reinforcing hydraulic cylinder is installed on the telescopic plate. A feeding mechanism is installed on the hydraulic support body. The feeding pipe and the reinforcing grouting pipe on the telescopic plate are both connected to the feeding mechanism.

2. The goaf gangue-hydraulic support collaborative bearing device according to claim 1, characterized in that: The second support beam is equipped with a first sealing airbag and a second sealing airbag at both ends. A third sealing airbag is also provided on both sides of the second support beam, both sides of the telescopic plate, and both sides of the vertical baffle. The first sealing airbag, the second sealing airbag, and the third sealing airbag are all connected to the sealing air pump.

3. The goaf gangue-hydraulic support collaborative bearing device according to claim 2, characterized in that: The bottom of the second support beam is equipped with a limit frame, and the limit groove of the limit frame is set opposite to the telescopic end of the reinforced hydraulic cylinder.

4. The goaf gangue-hydraulic support collaborative bearing device according to claim 3, characterized in that: The feeding mechanism includes a slurry pump and a screw conveyor. The slurry pump is used to transport gangue slurry and is connected to the reinforced grouting pipe. The screw conveyor is installed on the main support beam of the hydraulic support body. The screw conveyor inlet is positioned opposite to the conveyor belt that transports gangue. The conveyor belt is positioned with an inclined discharge roller relative to the inlet position, so that the conveyor belt at the inlet position is inclined. The gangue slides down to the inlet under the action of gravity. The output pipe of the screw conveyor is connected to an extension pipe. The extension pipe is connected to the output pipe through an extension hydraulic cylinder. The discharge end of the extension pipe is positioned between two reinforced hydraulic cylinders.

5. A goaf gangue-hydraulic support collaborative bearing device according to claim 4, characterized in that: A dust collector is installed at the feed inlet of the screw conveyor.

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