Down-hole gross coal dirt-discharging and mine water treating combined process

Abstract

An underground gross coal gangue removal and mine water treatment combined process is characterized in that the process comprises two parts: gangue removal operation from lump coal and mine water solid-liquid separation operation, wherein, the gangue removal operation from lump coal comprises screening, crushing and separation steps, and the mine water solid-liquid separation operation comprises hydraulic classification, concentration and pressure filtration steps; by the gangue removal operation from lump coal, chunks of gangues in the gross coal are removed, and simultaneously the large particles thereof are crushed into appropriate size; by the mine water solid-liquid separation operation, the solid substances in the mine water are recycled to a coal streamline, and simultaneously the clear overflow water is delivered to a underground water sump; the coal muddy water generated by the gangue removal operation from lump coal is delivered to a mine water solid-liquid separation systemfor treatment and the mine water solid-liquid separation system provides water for washing and selection for the gangue removal operation from lump coal, so the coal muddy water and the water for washing and selection are combined into an organic whole.

Description

technical field [0001] The invention relates to the field of coal mining and processing, in particular to a combined process of underground raw coal discharge and mine water treatment. The present invention mainly adopts a moving screen jig (or a shallow groove heavy-medium separator) to directly discharge large pieces of gangue underground, and the discharged gangue can be used for goaf filling or other purposes, and additional water is required for the sorting process. It is obtained from the mine water after concentrated precipitation and clarification, and the mine water after the concentrated precipitation and clarification enters the underground water tank, which solves the problem of dredging the underground water tank, and the coal slime water generated during the separation process is also processed by the mine water treatment system Separate jobs. [0002] The entire process system is a self-contained system, which can be easily added or withdrawn from the existing ...

AI Technical Summary

Problems solved by technology

[0004] At present, the raw coal is not processed underground, but directly enters the coal bunker at the bottom of the shaft, and is lifted by the hoisting system to go up the well before being processed. A considerable amount of bulk materials in the raw coal (accounting for 10-10% of the total amount of raw coal) 30% or so) has brought many problems to the production system: (1) The large material damages the mechanical equipment during the lifting and transportation process; (2) The large material blocks the coal flow line and causes the production to stop

This traditional method not only has a large workload, but also takes a long time to clear and excavate, and the working environment is harsh, and it is difficult to clean and excavate

[0009] Mechanized cleaning of mine water tanks is a difficult problem that coal mining enterprises have been eager to solve for many years. However, for decades, dozens of cleaning machines have been developed in my country, but they have not been popularized and used. The main reason is that the situation in the mine is complex and changeable. The water tank dredging equipment and its supporting system have disadvantages such as single performance, low dredging efficiency, and incomplete solid-liquid separation, which cannot adapt to the complex and changeable working environment of the underground tank

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