Deterioration prediction test device for bearing performance of water-proof and waterproof coal pillar of deep-buried mine

Abstract

The utility model discloses a deep-buried mine waterproof coal pillar bearing performance degradation prediction test device, which comprises a hydraulic oil cylinder fixedly mounted at the inner top of an electro-hydraulic servo pressure testing machine, a placement base fixedly mounted at the inner bottom of the electro-hydraulic servo pressure testing machine, and a workbench fixedly mounted at the upper end of the placement base; a sliding rail is arranged on the side wall of the workbench in a penetrating mode, and a clamping assembly used for clamping and fixing a test body is arranged in the sliding rail. And a driving assembly for driving the clamping assembly is arranged on the placing base. According to the utility model, the worm and the worm gear are driven by the motor to realize the movement of the clamping assembly, so that the test body is clamped and fixed, the bearing performance test is facilitated, and the stability of the test body is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water prevention and isolation coal pillar pretest, especially to a deep buried mine water prevention and isolation coal pillar bearing performance degradation pretest device. BACKGROUND

[0002] Water prevention and isolation coal pillar is one of important waterproof facilities in coal mine, and its setting can effectively prevent underground water, old goaf water and fault water from inrushing into underground, thereby avoiding water inrush accident and ensuring the safe coal mining, reducing personnel casualty and economic loss. However, in the long-term mining process, due to the influence of geological conditions, mining intensity, hydrological environment and various factors, the bearing performance of water prevention and isolation coal pillar can be gradually degraded, leading to the decline of its waterproof capacity, and further increasing the risk of water inrush accident in mine.

[0003] In order to accurately evaluate the bearing performance of water prevention and isolation coal pillar and predict its degradation trend, corresponding test work needs to be carried out. The traditional test method mostly uses indoor test device for simulation test, however, the test body is generally directly placed on the workbench without any fixing measures, which cannot guarantee the stability of the test body. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of deep buried mine water prevention and isolation coal pillar bearing performance degradation pretest devices, and its movement is realized by motor drive worm and worm wheel to realize the clamping fixation of test body, to facilitate the bearing performance test, ensure the stability of test body.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of deep buried mine water prevention and isolation coal pillar bearing performance degradation pretest device, including the hydraulic cylinder of the inner top of electro-hydraulic servo pressure testing machine is fixedly installed, the inner bottom of electro-hydraulic servo pressure testing machine is fixedly installed with placing base.

[0007] The side wall of the workbench is provided with slide rail, and the slide rail is provided with clamping assembly for clamping and fixing test body in the inside.

[0008] Driving assembly for driving clamping assembly is arranged on the placing base.

[0009] Preferably, the clamping assembly includes two fixed plates fixedly installed in the inside of slide rail, double-end screw is rotatably connected between the two fixed plates, two moving plates are symmetrically arranged in the inside of slide rail, clamping plate is fixedly installed at the other end of moving plate, and moving plate is threadedly connected with double-end screw.

[0010] Preferably, the side wall of the moving plate is provided with a threaded hole matched with the double-headed screw rod.

[0011] Preferably, the moving plate is a right-angle U-shaped plate, and the clamping plate is a circular arc plate.

[0012] Preferably, the driving assembly comprises a motor mounting cavity provided in the placing base, a driving motor is fixedly installed in the motor mounting cavity, a worm is fixedly installed on an output shaft of the driving motor, an upper end of the worm extends to the inside of the sliding rail, a worm wheel is fixedly installed on the middle part of the double-headed screw rod, and the worm wheel and the worm are in meshing engagement.

[0013] Preferably, a rubber buffer pad is fixedly installed on the inner side of the clamping plate.

[0014] The utility model has the following beneficial effects:

[0015] 1. The introduction of the hydraulic oil cylinder enables the device to simulate the actual pressure environment in the mine, and to perform real pressure testing on the water-resisting and isolating coal column. Such simulated environment helps to more accurately evaluate the load bearing performance of the coal column under pressure;

[0016] 2. The design of the rubber buffer pad on the inner side of the clamping plate not only ensures the stable clamping of the test body, but also reduces the damage to the test body to a certain extent during the clamping process. This helps to protect the integrity of the test body and ensure the accuracy of the test results;

[0017] 3. The movement of the clamping assembly is realized by the motor driving the worm and the worm wheel, which is simple and easy to control. At the same time, the test body can be quickly clamped and fixed to facilitate the load bearing performance testing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The utility model provides a kind of deep-buried mine water-resisting and isolating coal column load bearing performance degradation pretest device structure schematic view;

[0019] Fig. 2 The utility model provides a kind of deep-buried mine water-resisting and isolating coal column load bearing performance degradation pretest device section schematic view;

[0020] Fig. 3 The utility model provides a kind of deep-buried mine water-resisting and isolating coal column load bearing performance degradation pretest device clamping plate schematic view.

[0021] In the drawing: 1 electro-hydraulic servo pressure testing machine, 2 placing base, 3 moving plate, 4 clamping plate, 5 workbench, 6 hydraulic oil cylinder, 7 threaded hole, 8 motor mounting cavity, 9 driving motor, 10 worm, 11 worm wheel, 12 double-headed screw rod, 13 sliding rail, 14 fixed plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] In the description of the utility model, it needs to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model in 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 utility model.

[0024] Referring to Figs. 1-3 A kind of deep buried mine waterproof coal pillar bearing performance deterioration pretest device, including the inner top of electro-hydraulic servo pressure testing machine 1 is fixedly installed with hydraulic cylinder 6, located the inner top of testing machine, for applying vertical downward pressure, simulating actual pressure situation in mine, the inner bottom of electro-hydraulic servo pressure testing machine 1 is fixedly installed with placing base 2, the upper end of placing base 2 is fixedly installed with workbench 5;

[0025] The side wall of workbench 5 is provided with sliding rail 13, and the inside of sliding rail 13 is provided with a clamping assembly for clamping and fixing the test body, the clamping assembly includes two fixed plates 14 fixedly installed in the inside of sliding rail 13, a double-end screw 12 is rotatably connected between the two fixed plates 14, the thread rotation directions of the two ends of double-end screw 12 are opposite, to realize the opposite or opposite movement of moving plate 3, two moving plates 3 are symmetrically provided in the inside of sliding rail 13, the other end of moving plate 3 is fixedly installed with clamping plate 4, rubber buffer pad is fixedly installed on the inner side of clamping plate 4, the rubber buffer pad on the inner side of clamping plate 4 can prevent damage to the test body, moving plate 3 is a right-angle U-shaped plate, clamping plate 4 is a circular arc plate, moving plate 3 is threadedly connected with double-end screw 12, and screw holes 7 adapted to double-end screw 12 are formed in the side wall of moving plate 3;

[0026] A driving assembly for driving the clamping assembly is arranged on the placing base 2, the driving assembly includes a motor mounting cavity 8 formed in the placing base 2, a driving motor 9 is fixedly installed in the inside of motor mounting cavity 8, a worm 10 is fixedly installed on the output shaft of driving motor 9, the upper end of worm 10 extends to the inside of sliding rail 13, a worm wheel 11 is fixedly installed at the middle part of double-end screw 12, and worm wheel 11 is meshed with worm 10.

[0027] Working principle:

[0028] When the carrying capacity of the water-proof coal pillar needs to be tested, first, the test body is placed on the workbench 5, and the position of the clamping assembly is adjusted, the driving motor 9 is started, the driving motor 9 drives the worm wheel 11 to rotate through the worm 10, the worm wheel 11 drives the double-end screw 12 to rotate, since the double-end screw 12 is threadedly connected with the moving plate 3, the rotation of the double-end screw 12 will make the moving plate 3 move towards each other, thereby the clamping plate 4 clamps the test body, then, the hydraulic oil cylinder 6 is started, the vertical downward pressure is applied to the test body, the actual pressure condition in the mine is simulated, by observing the deformation condition, the failure mode and the like of the test body, whether the carrying capacity of the water-proof coal pillar under the pressure will deteriorate can be evaluated.

[0029] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A kind of deep-buried mine water-preventing coal pillar bearing performance deterioration pretest device, it is characterized by: The inner top of the electro-hydraulic servo pressure testing machine (1) is fixedly installed with a hydraulic oil cylinder (6), and the inner bottom of the electro-hydraulic servo pressure testing machine (1) is fixedly installed with a placing base (2), and the upper end of the placing base (2) is fixedly installed with a workbench (5); The sidewall of the workbench (5) is provided with a sliding rail (13), and the inside of the sliding rail (13) is provided with a clamping assembly for clamping and fixing the test body; The placing base (2) is provided with a driving assembly for driving the clamping assembly.

2. The test device for predicting the deterioration of the bearing capacity of the water-resisting coal pillar of a deep mine according to claim 1, characterized in that, The clamping assembly comprises two fixed plates (14) fixedly installed in the inside of the sliding rail (13), and a double-head screw rod (12) is rotatably connected between the two fixed plates (14), and the inside of the sliding rail (13) is symmetrically provided with two moving plates (3), and the other end of the moving plate (3) is fixedly installed with a clamping plate (4), and the moving plate (3) is threadedly connected with the double-head screw rod (12).

3. The test device for predicting the deterioration of the bearing capacity of the water-resisting coal pillar of a deep mine according to claim 2, characterized in that, The sidewall of the moving plate (3) is provided with a threaded hole (7) matched with the double-head screw rod (12).

4. The device for testing the deterioration of the bearing capacity of the water-resisting coal pillar of a deep mine according to claim 2, characterized in that, The moving plate (3) is a right-angle U-shaped plate, and the clamping plate (4) is a circular arc plate.

5. The device for pretesting the deterioration of the bearing capacity of the water-resisting coal pillar of a deep mine according to claim 1, characterized in that, The driving assembly comprises a motor mounting cavity (8) opened in the placing base (2), the inside of the motor mounting cavity (8) is fixedly installed with a driving motor (9), the output shaft of the driving motor (9) is fixedly installed with a worm (10), the upper end of the worm (10) extends to the inside of the sliding rail (13), the middle part of the double-head screw rod (12) is fixedly installed with a worm wheel (11), and the worm wheel (11) is meshed with the worm (10).

6. The device for testing the deterioration of the bearing capacity of the water-resisting coal pillar of a deep mine according to claim 2, characterized in that, The inner side of the clamping plate (4) is fixedly installed with a rubber buffer pad.

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