Portable ore rock explosion impact test device for applying confining pressure

Abstract

The utility model discloses a portable confining pressure applying ore rock explosion impact test device which comprises a steel base, two arc-shaped clamping rings are arranged on the upper surface of the steel base, a cylinder body is arranged on the upper surface of the steel base, the lower end of the side face of the cylinder body is connected with the arc-shaped clamping rings in a clamping mode through a clamping base, and the lower end of the side face of the cylinder body is connected with the arc-shaped clamping rings in a clamping mode. An annular rubber bag is arranged on the inner side of the cylinder body, a hydraulic system is connected to the lower end of the side face of the annular rubber bag, a flexible annular metal sheet is arranged on the inner side of the annular rubber bag, and a steel bottom column is arranged on the upper surface of the steel base and located in the middle of the interior of the cylinder body. The outer side of the steel bottom column is attached to the inner side of the flexible annular metal sheet, a pressure sensor is arranged on the upper surface of the steel bottom column, the structure is simple, use is more convenient, the situation that the deep ore rock is damaged by explosion impact can be accurately detected, pressure generated during explosion can be detected, and use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ore rock explosion impact test, specifically to a portable ore rock explosion impact test device of surrounding pressure application. BACKGROUND

[0002] With the gradual exploitation of mineral resources, the exploitation of mineral rocks has been transferred from shallow to deep, and it is urgently needed to study the dynamic mechanical behavior and impact breaking rule characteristics of rocks under confining pressure. The impact speed of the current domestic SHPB device is small, and the impact damage effect on hard rocks is not ideal. It is also unable to carry out experimental research on wave impedance and rock breaking effect. Other blasting impact tests have the problems of large test block volume, difficult handling and operation of confining pressure loading equipment, and high test cost. The current ore rock explosion impact test structure is complex, and it is inconvenient to replace experimental materials. The test speed is slow. In the patent authorization announcement No. CN205317601U, although a deep rock mass explosion ground impact disturbance simulation test device is also disclosed, the structure is to wrap the test ore rock inside, and the detonation gas and explosion stress wave cannot be separated out, so the influence of stress wave impedance of different explosives on rock damage cannot be analyzed. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art, provide a portable ore rock explosion impact test device of surrounding pressure application, which is simple in structure, convenient to use, can accurately detect the damage of explosion impact on deep ore rock, and can detect the pressure generated during explosion and the block size distribution rule of test sample breaking, provides a test basis for subsequent fractal dimension analysis, and can effectively solve the problems in the background art.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: A portable confining pressure applied mine rock explosion impact test device, including steel base, the upper surface of steel base is equipped with two arc clamping rings, and the upper surface of steel base is provided with cylinder body, the lower end of the side of cylinder body is clamped through the clamping base and the arc clamping ring, the inside of cylinder body is equipped with annular rubber capsule bag, the lower end of the side of annular rubber capsule bag is connected with hydraulic system, the inside of annular rubber capsule bag is provided with flexible annular metal sheet, the upper surface of steel base is equipped with steel base column, the inside of cylinder body is located in steel base column, the outside of steel base column is pasted with the inside of flexible annular metal sheet, the upper surface of steel base column is provided with pressure sensor, the upper surface of pressure sensor is equipped with first steel gasket and second steel gasket of up-down stacking, and the second steel gasket is provided with mine rock sample between first steel gasket and second steel gasket, the upper end of cylinder body is equipped with the opening corresponding with the upper end of second steel gasket, the upper surface of cylinder body is provided with two rotation limit pieces for limiting second steel gasket, the upper surface center of second steel gasket is equipped with explosive, and the top end of explosive is connected with detonator, the upper end of the side of annular rubber capsule bag is connected with exhaust pipe, and exhaust pipe penetrates to the outside of cylinder body and is connected with valve.

[0005] Further, the pressure sensor is connected with a wire, the wire passes through the steel base column and is drawn out from one side of the steel base.

[0006] Further, the hydraulic system includes a hydraulic oil pump, the hydraulic oil pump is in communication with the inside of the annular rubber capsule bag through a hydraulic oil pipe penetrating an oil inlet of the lower part of the cylinder body, and a pressure gauge and a pressure relief valve are installed on the hydraulic oil pipe.

[0007] Further, the rotation limit piece includes a vertical support connected with the cylinder body, and a sector pressing plate is rotationally connected to the vertical support, and the second steel gasket can be limited to the inside of the cylinder body by rotating the sector pressing plate.

[0008] Further, two pressure detection strain gauges are pasted to the outside of the mine rock sample, and the two pressure detection strain gauges are arranged in a vertical direction, and the pressure detection strain gauges detect the pressure on the outside of the mine rock sample.

[0009] Compared with the prior art, the utility model has the beneficial effects that: the second steel gasket can be limited to the inside of the cylinder body by rotating the sector pressing plate, the hydraulic oil is introduced into the annular rubber capsule bag 14 to apply confining pressure to the mine rock sample 8, and then the blasting impact of the explosive is carried out, the confining pressure is portable, the mine rock explosion impact test can better simulate the real explosion effect, the portable confining pressure applied mine rock explosion impact test device has a simple structure, is more convenient to use, can accurately detect the damage of the explosion impact to the deep mine rock, and can detect the pressure generated during the explosion, and is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure schematic view of the utility model;

[0011] Figure 2 It is a structure schematic view of the utility model A place amplification;

[0012] Figure 3 It is a structure schematic view of the utility model rotation limiting piece;

[0013] Figure 4 It is a structure schematic view of the utility model pressure detection strain gauge installation.

[0014] In the figure: 1 steel base, 2 cylinder, 3 arc snap ring, 4 steel column, 5 pressure sensor, 6 wire, 7 first steel gasket, 8 ore sample, 9 second steel gasket, 10 explosive, 11 detonator, 12 exhaust pipe, 13 flexible annular metal sheet, 14 annular rubber capsule bag, 15 pressure relief valve, 16 pressure gauge, 17 hydraulic oil pump, 18 valve, 19 rotation limiting piece, 191 vertical support, 192 fan-shaped pressing plate, 20 clamping seat. DETAILED DESCRIPTION

[0015] 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. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0016] Please refer to Figures 1-4The utility model provides a technical scheme: a portable surrounding pressure applied mine rock explosion impact test device, including steel base 1, the upper surface of steel base 1 is equipped with two arc snap rings 3, and the upper surface of steel base 1 is provided with cylinder body 2, the side lower end of cylinder body 2 is connected with arc snap ring 3 through clamping seat 20, the inboard of cylinder body 2 is equipped with annular rubber capsule bag 14, the side lower end of annular rubber capsule bag 14 is connected with hydraulic system, the inboard of annular rubber capsule bag 14 is provided with flexible annular metal sheet 13, the upper surface of steel base 1 is equipped with steel base column 4, and steel base column 4 is located in the inside middle of cylinder body 2, and the outboard of steel base column 4 is pasted with flexible annular metal sheet 13 inboard, and the upper surface of steel base column 4 is provided with pressure sensor 5, and the upper surface of pressure sensor 5 is equipped with first steel gasket 7 and second steel gasket 9 of up-down stacking, and the second steel gasket 9 upper end corresponding opening is equipped with in the upper end of cylinder body 2, and the upper surface of cylinder body 2 is provided with two rotating limit pieces 19 of the second steel gasket 9 limit, and the upper surface center of second steel gasket 9 is equipped with explosive 10, and the top end of explosive 10 is connected with detonator 11, and the side upper end of annular rubber capsule bag 14 is connected with exhaust pipe 12, and exhaust pipe 12 is penetrated to the outboard of cylinder body 2 and is connected with valve 18, and pressure sensor 5 is connected with wire 6, and wire 6 is passed through steel base column 4 and is worn from one side of steel base 1, and the hydraulic system includes hydraulic oil pump 17, and hydraulic oil pump 17 is communicated with annular rubber capsule bag 14 inside through the oil inlet of the lower part of cylinder body 2 and is penetrated with hydraulic oil pipe, and pressure gauge 16 and pressure relief valve 15 are installed on the hydraulic oil pipe, and rotating limit piece 19 includes the vertical support 191 connected with cylinder body 2, and the vertical support 191 is equipped with the sector pressing plate 192 of rotation connection, and the second steel gasket 9 can be limited to the inside of cylinder body 2 by the rotation of sector pressing plate 192, and the outboard of mine rock sample 8 is pasted with two pressure detection strain gauges, and the two pressure detection strain gauges are vertically arranged, and the pressure of the outboard of mine rock sample 8 is detected by pressure detection strain gauge, and wire connected pressure detection strain gauge is set according to the installation requirement, and the surrounding pressure is applied to mine rock sample 8 by the hydraulic oil into annular rubber capsule bag 14, and then the blasting impact of explosive is carried out, and the surrounding pressure is applied portable, and the mine rock explosion impact test can simulate the real explosion effect better, and the portable surrounding pressure applied mine rock explosion impact test device is simple in structure, and is more convenient to use, can accurately detect the damage of explosion impact to deep mine rock, and can detect the pressure generated when exploding, and is more convenient to use.

[0017] In use: for different height ore rock sample 8, select the corresponding height of the first steel gasket 7, by adjusting the height of the first steel gasket 7 to ensure that the top of the second steel gasket 9 is flush with the top of the cylinder body 2, polish the corresponding paste pressure sensor 5 on the steel base column 4 with sandpaper, so that the pressure sensor 5 can be fixed on the steel base column 4, then connect the pressure sensor 5 with the lead wire 6, then stack the steel base column 4, the first steel gasket 7, the ore rock sample 8 and the second steel gasket 9 together and place them on the steel base 1, apply an appropriate amount of butter between each layer to ensure that the first steel gasket 7, the second steel gasket 9 and the ore rock sample 8 and the steel base column 4 are tightly bonded, the second step is to put the flexible annular metal sheet 13 outside the steel base column 4, the first steel gasket 7, the ore rock sample 8 and the second steel gasket 9, then put the annular rubber bag 14 outside the flexible annular metal sheet 13 and place it on the steel base 1 with the cylinder body 2, the cylinder body 2 and the steel base 1 are connected through the clamping seat 20 and the arc-shaped clamping ring 3, the third step is to limit the second steel gasket 9 to the inside of the cylinder body 2 by rotating the fan-shaped pressing plate 192, the oil inlet is sealed, the hydraulic oil can be pumped into the annular rubber bag 14 through the hydraulic oil pump 17, the valve 18 of the exhaust port 12 is opened until the annular rubber bag 14 is filled with hydraulic oil, then the valve 18 of the exhaust port 12 is closed, the pressure is increased to 20PMa-40PMa by watching the hydraulic gauge, then the pressure relief valve is set, the hydraulic oil is released when the hydraulic system reaches a certain pressure, during the experiment, the pressure detection strain gauge outside the pressure sensor 5 and the ore rock sample 8 can detect the pressure on the outside and the upper and lower sides of the ore rock sample 8, the valve 18 of the exhaust port 12 is opened to return the hydraulic oil in the annular rubber bag 14 to the hydraulic system when the experiment is finished.

[0018] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application.

Claims

1. A portable apparatus for rock explosion impact test under confining pressure comprising a steel base (1) characterised in that: The upper surface of the steel base (1) is provided with two arc-shaped clamping rings (3), and the upper surface of the steel base (1) is provided with a cylinder body (2), the lower end of the side surface of the cylinder body (2) is clamped with the arc-shaped clamping ring (3) through the clamping seat (20), the inner side of the cylinder body (2) is provided with an annular rubber capsule bag (14), the lower end of the side surface of the annular rubber capsule bag (14) is connected with a hydraulic system, the inner side of the annular rubber capsule bag (14) is provided with a flexible annular metal sheet (13), the upper surface of the steel base (1) is provided with a steel base column (4), the steel base column (4) is located in the middle of the inside of the cylinder body (2), the outer side of the steel base column (4) is attached to the inner side of the flexible annular metal sheet (13), the upper surface of the steel base column (4) is provided with a pressure sensor (5), the upper surface of the pressure sensor (5) is provided with a first steel gasket (7) and a second steel gasket (9) stacked up and down, a mineral rock sample (8) is arranged between the first steel gasket (7) and the second steel gasket (9), the upper end of the cylinder body (2) is provided with an opening corresponding to the upper end of the second steel gasket (9), the upper surface of the cylinder body (2) is provided with two rotating limit members (19) limiting the second steel gasket (9), the upper surface center of the second steel gasket (9) is provided with an explosive (10), and the top end of the explosive (10) is connected with a detonator (11), the side upper end of the annular rubber capsule bag (14) is connected with an exhaust pipe (12), the exhaust pipe (12) penetrates to the outside of the cylinder body (2) and is connected with a valve (18).

2. The portable apparatus for testing the rockburst of mine rock under confining pressure according to claim 1, characterized in that: The pressure sensor (5) is connected with a wire (6), the wire (6) penetrates through the steel base column (4) and is drawn out from one side of the steel base (1).

3. The portable apparatus for testing the rockburst of mine rock under confining pressure according to claim 1, characterized in that: The hydraulic system comprises a hydraulic oil pump (17), the hydraulic oil pump (17) is communicated with the inside of the annular rubber capsule bag (14) through a hydraulic oil pipe penetrating the oil inlet of the lower part of the cylinder body (2), and the hydraulic oil pipe is provided with a pressure gauge (16) and a pressure relief valve (15).

4. The portable apparatus for testing the rockburst of mine rock under confining pressure according to claim 1, characterized in that: The rotating limiting member (19) comprises a vertical support (191) connected with the cylinder body (2), and a fan-shaped pressing plate (192) rotatably connected with the vertical support (191).

5. The portable apparatus for testing the rockburst of mine rock under confining pressure according to claim 1, characterized in that: The outer side of the mineral rock sample (8) is pasted with two pressure detection strain gauges, and the two pressure detection strain gauges are arranged in a vertical direction, and the pressure detection strain gauges detect the pressure on the outer side of the mineral rock sample (8).

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