A test simulation device for gob roof caving impact gas wave

Abstract

The utility model provides a kind of test simulation device of gob roof collapse impact air blast, including hoisting structure and top round barrel;Hoisting mechanism includes lifting frame and electric hoist, and the hoisting end of electric hoist is provided with electromagnetic chuck, and the round barrel opening is directly opposite the hoisting end of electric hoist, and the barrel wall is set air outlet in the position close to bottom, and top plate is set in round barrel, and top plate and round barrel are concentric, and top plate perimeter and barrel wall inner surface are attached, and the weight block set in the center of top plate bottom surface, and the center of top surface and electromagnetic chuck magnetic force are adsorbed to connect.The utility model structure is simple, easy to operate, improves efficiency, and weight block is set in the center of top plate bottom surface, when electromagnetic chuck power disappears and electromagnetic force disappears and releases top plate, the setting of gravity block can make top plate vertically and stably collapse downward, prevent top plate from tilting and jam in round barrel, and ensure that test is carried out smoothly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of indoor similar test, especially is involved in a test simulation device of gob roof caving impact gas wave. BACKGROUND

[0002] In the process of mining, with the advance of mining operation, the rock mass of the gob roof gradually loses support and may collapse. When the gob roof collapses, the sudden movement of the rock mass will cause the severe compression and expansion of the surrounding air, forming an impact gas wave. This impact gas wave has high pressure and speed, which may cause casualties to personnel in the mine and damage to equipment, and even trigger secondary disasters such as gas explosion. Therefore, in order to improve the safety of the gob, scientific research and engineering technical measures are needed to prevent and control.

[0003] The current gob roof caving induced impact gas wave test simulation device includes a barrel, a roof and an electric hoist, the roof is arranged in the barrel, and the roof is hoisted on the electric hoist by the electromagnetic chuck. During the test, the electromagnetic chuck is powered off, the roof falls, and the roadway arranged at the air outlet at the bottom of the barrel induces the impact gas wave, and the propagation law and energy loss of the impact gas wave in the roadway are obtained through the test, so as to master and prevent and control the safety of the gob construction.

[0004] However, it is found in the test that the current gob roof caving induced impact gas wave test simulation device has the following problems: since the roof is a flat and thin plate structure, it often tilts when falling in the barrel, which causes jamming with the barrel wall, resulting in failure of the test, which affects the test efficiency. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims to provide a test simulation device of gob roof caving impact gas wave to solve the problem of roof tilting and jamming during the test and ensure the smooth progress of the test.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: A test simulation device of gob roof caving impact gas wave, comprising a lifting mechanism and a barrel with an open top; The lifting mechanism comprises a lifting frame, the lifting frame is provided with an electric hoist, and the lifting end of the electric hoist is vertically downward, and the lifting end is provided with an electromagnetic chuck; The barrel opening is opposite to the lifting end of the electric hoist, the lower end of the barrel wall is provided with an air outlet, a roof is arranged in the barrel, the roof and the barrel are concentric, the peripheral edge of the roof and the inner surface of the barrel wall are attached, and the weight block arranged at the center of the bottom surface of the roof and the electromagnetic chuck magnetically attracted are connected.

[0007] Further, the barrel bottom position of the barrel is provided with a buffer sleeve, the buffer sleeve opening is opposite to the weight block, a buffer plate is arranged in the buffer sleeve, and the buffer plate is connected to the barrel bottom through a spring.

[0008] Further, the barrel is provided with a support plate at the top position of the buffer sleeve, and the buffer sleeve opening penetrates through the support plate. The distance from the buffer plate to the support plate is less than the height of the weight block. The air outlet is arranged to be higher than the support plate.

[0009] Further, the air outlet is provided with a plurality of air outlets, and the shapes of the air outlets are different.

[0010] Further, the lifting frame is a movable gantry crane.

[0011] Further, the electric hoist is arranged on the lifting frame through a monorail trolley.

[0012] Compared with the prior art, the test simulation device for the roof collapse impact gas wave of the goaf has the following advantages: (1) The test simulation device for the roof collapse impact gas wave of the goaf has the following advantages: simple structure, convenient operation, high cost and high risk of field test can be avoided, different conditions of the goaf roof collapse impact gas wave can be simulated quickly and repeatedly, a large amount of experimental data can be obtained, the progress can be accelerated, the efficiency can be improved, the weight block is arranged at the center of the bottom surface of the roof, when the electromagnetic force of the electromagnetic chuck disappears and releases the roof, the arrangement of the weight block can make the roof fall down vertically and stably, the roof can be prevented from tilting and jamming in the barrel, and the test can be ensured to be carried out smoothly.

[0013] (2) In the test simulation device for the roof collapse impact gas wave of the goaf, the buffer mechanism is arranged at the bottom of the barrel, and the roof falling to the bottom of the barrel is buffered to prevent the roof from violently impacting the bottom of the barrel. DETAILED DESCRIPTION

[0014] The accompanying drawings, which form a part of this description, are included to provide a further understanding of the application and are incorporated herein for illustrative purposes. The embodiments of the application described herein are described in terms of technical features. The description of the embodiments of the application is not intended to limit the scope of the application, but to explain the application. Figure 1 A test simulation device for the roof collapse impact gas wave of the goaf is shown in the drawings. Figure 2 A front view of an impact element in the test simulation device for the roof collapse impact gas wave of the goaf is shown. Figure 3 A bottom view of the impact element in the test simulation device for the roof collapse impact gas wave of the goaf is shown. Figure 4 A structure diagram of a barrel in the test simulation device for the roof collapse impact gas wave of the goaf is shown.

[0015] Explanation of reference signs: 1-lifting frame; 2-monorail trolley; 3-electric hoist; 4-barrel; 41-air outlet; 5-top plate; 6-electromagnetic chuck; 7-weight block; 8-buffer sleeve; 9-buffer plate; 10-spring; 11-bottom plate; 12-supporting plate. DETAILED DESCRIPTION

[0016] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments.

[0017] As Figure 1 shown, a kind of goaf roof collapse impact gas wave's test simulation device, including lifting mechanism and top opening barrel 4.Lifting mechanism includes lifting frame 1 and electric hoist 3, lifting frame 1 is preferably mobile gantry, and monorail trolley 2 is arranged on its crossbeam, and electric hoist 3 is arranged on monorail trolley 2, and monorail trolley 2 drives electric hoist to move horizontally.The lifting end of electric hoist 3 is vertically downward, and the lifting end is equipped with lifting hook.Barrel 4 is arranged directly below the short of electric hoist 3, and barrel 4 is arranged on bottom plate 11, and bottom plate 11 is the barrel bottom of barrel.The opening of barrel 4, i.e. its upward facing port, is directly opposite the lifting hook of electric hoist 3, and air outlet 41 is arranged at the barrel wall of barrel 4 close to barrel bottom, and air outlet 41 is arranged several, and its shape is different, such as air outlet shape is circular, square, square etc., to connect different section shape roadway bifurcation model, can carry out the comparative analysis of impact gas wave propagation in different section shape roadway.Each air outlet 41 is correspondingly matched with air door, and air door is closed after stopping test.

[0018] Barrel 4 is equipped with top plate 5, and the structure of top plate 5 is as shown in Figure 2 、 Figure 3 , top plate is the circular plate with the thickness of 10-15mm, and the peripheral edge of top plate 5 is attached to the inner surface of barrel wall of barrel 4, so that top plate 5 and barrel wall of barrel 4 form relatively sealed structure.Sealing ring can also be arranged around top plate to further improve the air tightness between top plate and barrel.Weight block 7 is arranged at the bottom surface center of top plate 5, and weight block 7 is cylindrical structure, and its weight is 2-3 times of the weight of top plate.The setting of weight block 7 makes the falling center of gravity of top plate be directly below top plate, to ensure that top plate falls vertically downward in barrel, and top plate does not appear tilt, jam phenomenon during falling process, to ensure that test is carried out smoothly.Electromagnetic chuck 6 is arranged at the top surface center of top plate 5 (omitted) Figure 2 、 Figure 3 ), and electromagnetic chuck is hung on the lifting hook of electric hoist.Electromagnetic chuck 6 generates magnetism by electrification, so that electromagnetic chuck 6 and top plate 5 are connected by magnetic force;electromagnetic chuck 6 is deenergized, and the magnetic force of electromagnetic chuck disappears, and top plate 5 falls along barrel 4, to induce impact gas wave.

[0019] In the utility model, the structure of barrel is as shown in Figure 4As shown, the barrel 4 is provided with a buffering mechanism, the buffering mechanism includes a buffering sleeve 8 provided on the barrel bottom, i.e. the bottom plate 11, the buffering sleeve 8 is open to the weight block 7, a buffering plate 9 is provided in the buffering sleeve 8, and the buffering plate 9 is connected to the barrel bottom of the barrel 4 through a spring 10. As preferred, the barrel 4 is provided with a support plate 12 at the top position of the buffering sleeve 8, the buffering sleeve 8 is open through the support plate 12, and the distance from the buffering plate 9 to the support plate 12 is less than the height of the weight block 7; the air outlet 41 is arranged above the support plate 12. When the top plate 5 falls to the position close to the barrel bottom, the weight block 7 first enters the buffering sleeve 8, and when the weight block 7 falls and hits the position of the buffering plate 9, the spring 10 acts on the impact force of the weight block 7, so as to prevent the top plate 5 from violently impacting the barrel bottom.

[0020] The operation process of the utility model includes the following steps: Step one: move the lifting frame 1 and the monorail trolley 2, so that the electromagnetic chuck 6 hung by the electric hoist 3 is moved to the position directly above the top plate 5; Step two: power on the electromagnetic chuck 6, start the electric hoist 3, and make the electromagnetic chuck 6 magnetically adsorb at the center position of the top plate 5. Step three: after the adsorption is determined to be good, start the electric hoist 3 again, and move the top plate 5 to the specified height position of the barrel. Step four: power off the electromagnetic chuck 6, and the top plate collapses to induce impact air waves.

[0021] Step five: repeat the above steps, adjust the position of the top plate 5 and replace the branch model of the roadway, and obtain the impact air wave size under different test schemes.

[0022] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A test simulation device for the impact wave of roof collapse in a goaf, characterized in that: Includes a lifting mechanism and a cylindrical barrel with an open top (4); The lifting mechanism includes a lifting frame (1), the lifting frame (1) is equipped with an electric hoist (3), the lifting end of the electric hoist (3) is vertically downward, and the lifting end is equipped with an electromagnetic chuck (6). The opening of the cylindrical barrel (4) is directly opposite the lifting end of the electric hoist. An air outlet (41) is provided at the lower end of the barrel wall of the cylindrical barrel (4). A top plate (5) is provided inside the cylindrical barrel (4). The top plate (5) and the cylindrical barrel (4) are concentric. The periphery of the top plate (5) is attached to the inner surface of the barrel wall of the cylindrical barrel (4). A weight block (7) is provided at the center of the bottom surface of the top plate (5), and the center of the top surface is magnetically connected to the electromagnetic chuck (6).

2. The experimental simulation device for the impact wave of roof collapse in a goaf area according to claim 1, characterized in that: A buffer sleeve (8) is provided at the bottom of the barrel (4), with the opening of the buffer sleeve (8) facing the weight block (7). A buffer plate (9) is provided inside the buffer sleeve (8), and the buffer plate (9) is connected to the bottom of the barrel (4) by a spring (10).

3. The experimental simulation device for the impact wave of roof collapse in a goaf area according to claim 2, characterized in that: The cylindrical barrel (4) has a support plate (12) at the top of the buffer sleeve (8), and the opening of the buffer sleeve (8) extends through the support plate (12); The distance between the buffer plate (9) and the support plate (12) is less than the height of the weight block (7); The air outlet (41) is positioned above the support plate (12).

4. The experimental simulation device for the impact wave of roof collapse in a goaf area according to claim 1, characterized in that: The air outlet (41) is provided in several parts, and each part has a different shape.

5. The experimental simulation device for the impact wave of roof collapse in a goaf area according to claim 1, characterized in that: The lifting frame (1) is a mobile gantry frame.

6. The experimental simulation device for the impact wave of roof collapse in a goaf area according to claim 1, characterized in that: The electric hoist (3) is moved and mounted on the lifting frame (1) via a monorail trolley (2).

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