Waste rock discharging and sorting comprehensive treatment method for underground lump coal

Abstract

The invention discloses a waste rock discharging and sorting comprehensive treatment method for underground lump coal, which comprises the following steps of: transporting raw coal of a mining area to a tunnel provided with a rolling disk screen through a raw coal incoming material belt machine to perform grading treatment; directly feeding the screened substances into an underground primary coal transportation belt machine, feeding the granular coal on the screen into a fixed grate screen, and feeding the screened coal into an underground mechanical movable sieve jig to perform sorting; conveying the sorted lump coal to a tunnel lump coal removal belt machine, and conveying the sorted lump waste rock to a tunnel lump waste rock removal belt machine till an underground waste tunnel or an underground waste rock filling system; and pumping the sorted coal slurry to a high-frequency screen through a coal slurry pump to intercept coarse coal, then dehydrating the coal slurry, and recycling filtrate so as to realize closed cycle of washing water. The method discharges waste rocks from the lump coal by adopting the underground mechanical movable sieve jig adaptive to the underground tunnel chamber operation, occupies a little space, is convenient for mounting and underground chamber operation, has simple process flow, can effectively reduce pollution, is favorable for environmental protection, saves a large amount of resources, saves manpower and resources, and remarkably improves the sorting operation efficiency and the lump coal yield.

Description

technical field [0001] The invention relates to a sorting process for solid materials in coal mines, in particular to an underground lump coal gangue sorting that utilizes an underground mechanical dynamic screen jig and its matching machinery for grading, transportation, and water washing and recycling. Comprehensive processing method. It is mainly used for the comprehensive treatment of raw coal classification, gangue discharge and coal slime dehydration within a certain particle size range in the underground. Background technique [0002] Since the successful application of the mechanical gangue-discharging equipment of the moving sieve jig, my country has eliminated the backward method of lump coal gangue-discharging mainly by manual selection for a long period of time. For easy coal preparation, it is currently the most economical and most applicable washing equipment. The dynamic sieve jigging process is simple, the operation cost is low, the separation accuracy is hi...

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