Method and equipment for separating, conveying and filling underground coal and gangues

Abstract

The invention discloses a method and equipment for separating, conveying and filling underground coal and gangues. The method includes crushing and separating the coal and the gangues directly in an underground environment twice by a roll crushing separator and a hammer crushing separator; directly feeding separated coal briquettes into an underground coal bunker by a pneumatic conveying and filling system; crushing separated gangues into gangue fragments by a roll crusher; and conveying the crushed gangues to a mined-out region to fill the mined-out region. The method and the equipment have the advantages that the problem in the aspect of transportation for underground coal and underground gangues is solved, underground space is saved, large quantities of raw materials are provided for filling the underground mined-out region, problems of surface subsidence, accumulation of a gangue dump and the like are solved, and requirements on environment-friendly coal mining and environment-friendly production are met; and the method is smart in conception, the structure is reasonable, the equipment is simple, the occupied underground space is small, particularly, an underground transportation structure is changed owing to the pneumatic conveying and filling system, the underground space utilization rate is increased, coal and gangue separating equipment is good in separation effect, and the method and the equipment are wide in applicability and high in novelty in the field.

Description

technical field [0001] The invention relates to a method and equipment for separating, transporting and filling underground coal and gangue, and is especially suitable for sorting and transporting lump coal and gangue in underground mines. Background technique [0002] The separation and separation methods of coal and gangue currently used mainly include hand selection, winnowing, water separation, and gamma ray separation. Hand selection: picking gangue by hand from the belt conveyor, the working conditions are difficult, the efficiency is low, and misselection and missed selection are serious. Wind separation: take advantage of the different densities of coal and gangue, and separate coal and gangue by the buoyancy of the wind. It is suitable for areas with poor water resources, but the equipment investment is large, the floor area is large, the dust treatment equipment is large, and the treatment effect is not ideal. Suitable for underground use. Water separation: using...

AI Technical Summary

Problems solved by technology

Hand selection: Picking gangue from the belt conveyor by hand, the working conditions are difficult, the efficiency is low, and the misselection and missed selection are serious

Wind separation: take advantage of the different densities of coal and gangue, and separate coal and gangue by the buoyancy of the wind. It is suitable for areas with poor water resources, but the equipment investment is large, the floor area is large, the dust treatment equipment is large, and the treatment effect is not ideal. Suitable for downhole use

Water separation: using the different densities of coal and gangue to separate coal and gangue by liquid buoyancy, the separation effect is good, but the equipment is expensive, the process is complicated, and it is difficult to realize underground

Gamma ray sorting: use gamma ray to identify coal and gangue, generate different electrical signals according to the attenuation of gamma ray in coal and gangue, and control the actuator through the feedback of electrical signals to change the trajectory of gangue, thereby Realize the separation of coal and gangue, but the system is complicated, the sorting ability is small, and the radiation hazard of radioactive sources is hidden. The raw coal on the site often contains water or coal slime, so that the surface of the coal gangue is covered by the slime, causing difficulties in identification

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