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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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 co

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

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

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

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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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