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Experiment table and experiment method for identifying coal-gangue dynamic state

A technology of dynamic identification and test bench, which is applied in the test bench and experimental field, can solve the problems of inability to accurately control the closing time of the coal outlet, immature dynamic identification technology of coal gangue, and great influence on the underground environment, etc., and achieves a simple structure , high accuracy, and the effect of reducing gangue content

Active Publication Date: 2013-11-20
CHINA UNIV OF MINING & TECH
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  • Claims
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Problems solved by technology

[0002] At present, top-coal caving mining in coal mines has been widely used in our country. During the top-coal caving process, coal gangue is always in a flowing state. The opening and closing of the coal opening mostly depends on the coal opening experience of the workers, and the closing of the coal opening cannot be accurately controlled. Closing too early will cause loss of top coal, and closing too late will increase the gangue content of coal
In addition, the existing coal gangue dynamic identification technology is not mature enough, and is greatly affected by the underground environment

Method used

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  • Experiment table and experiment method for identifying coal-gangue dynamic state

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Embodiment Construction

[0017] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0018] The coal gangue dynamic identification test bench of the present invention mainly consists of a steel table 1, a detector 10, a funnel 7, a flat trolley 11, a blanking box 13, a lift 3, table legs 2, a base 4, a baffle plate 8, and a support frame 12; the two sides of one end of the steel platform 1 are respectively hinged with a leg 2, and the middle position of the other end is hinged with a lifter 3, and the leg 2 and the lifter 3 are respectively fixed on the base 4, and the base 4 It is T-shaped, and the legs 2 are welded on one side of the base 4, and the elevator 3 is hinged on the other side of the base 4. The funnel 7 is welded on the steel table top 1, the material outlet of the funnel 7 is on the side of the platform leg 2, and there is a baffle plate 8 that can be drawn out laterally at the coal discharge port to adjust the size of the co...

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Abstract

The invention provides an experiment table and an experiment method for identifying a coal-gangue dynamic state. The experiment table is composed of a steel tabletop, a detector, a funnel, a flat plate cart, a blanking box, a lift, a motor, table legs, a base, a baffle and a hinge. The experiment method comprises the following steps that: a coal-gangue mixture is contained in the funnel and an inclined angle is adjusted by the lift; the detector is mounted on the flat plate cart; the detector and the blanking box are placed and the distance between the detector and a coal feed port of the experiment table is adjusted; then the baffle is pulled out in the lateral direction and the coal-gangue mixture in the funnel flows out and drops into the blanking box, so as to simulate a coal caving process of a top coal caving hydraulic bracket and measure the mixing degree of caved coal and gangues. According to the experiment table and the experiment method provided by the invention, when the coal-gangue mixture falls off, relative data is acquired by the detector; processing and experimental simulation for the data are used for determining a reasonable coal caving height and the inclined angle of a tail beam of the top coal caving hydraulic bracket, so as to reduce the gangue content of the caved top coal and improve the recovery coefficient; the experiment table and the experiment method provided by the invention have guidance meanings on optimization of field top coal caving technological parameters.

Description

technical field [0001] The invention relates to an experimental platform and an experimental method, in particular to an experimental platform and an experimental method suitable for dynamic identification of coal gangue. Background technique [0002] At present, top-coal caving mining in coal mines has been widely used in our country. During the top-coal caving process, coal gangue is always in a flowing state. The opening and closing of the coal opening mostly depends on the coal opening experience of the workers, and the closing of the coal opening cannot be accurately controlled. Closing too early will cause loss of top coal, and closing too late will increase the gangue content of coal. In addition, the existing coal gangue dynamic identification technology is not mature enough, and is greatly affected by the underground environment. Therefore, the high gangue content rate and low recovery rate of the released top coal have always been the problems in the top coal cavi...

Claims

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Application Information

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IPC IPC(8): G01N33/22
Inventor 张宁波刘长友陈现辉鲁岩杨培举吴锋锋
Owner CHINA UNIV OF MINING & TECH
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