Coal mine goaf long-distance slurry filling and conveying system and method

Abstract

The invention discloses a coal mine goaf long-distance slurry filling and conveying system comprising a slurry preparation system, a slurry storage tank and a self-washing system. A slurry outlet of the slurry preparation system communicates with a slurry inlet of the slurry storage tank. A slurry outlet of the slurry storage tank leads to a filling working face through a slurry conveying pump anda filling pipeline. The filling pipeline and the slurry inlet of the slurry storage tank communicate through the self-washing system by means of a washing pipeline. By means of the coal mine goaf long-distance slurry filling and conveying system, long-distance large-carrying-capacity filling and coal mine depletion green mining are achieved, and meanwhile the coal mine goaf long-distance slurry filling and conveying system can be widely applied to the industries of metallurgical mines and the like. The invention further discloses a coal mine goaf long-distance slurry filling and conveying method.

Description

technical field [0001] The invention belongs to the technical field of coal mine filling and mining, and in particular relates to a long-distance slurry filling and conveying system for goafs in coal mines, and also relates to a long-distance slurry filling and conveying method for goafs in coal mines. Background technique [0002] At present, solid wastes such as gangue, coal slime, fly ash produced in the process of coal mining, washing and power generation in our country, and waste slag produced in coal chemical industry are generally piled on the ground. These solid wastes occupy land and pollute the environment. These solid wastes need to be returned to the well for filling, so as to realize the green filling mining of coal mine loss reduction. [0003] The existing coal mine slurry filling mining technology mainly has the following problems: (1) The general slurry filling mining technology mostly uses a plunger pump for slurry filling. Due to technical limitations, thi...

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a long-distance slurry filling and conveying system in the goaf of a coal mine, which solves the problem that the plunger pump filling mining technology cannot transport materials at a long distance, and the filling capacity is small. Troublesome pipeline flushing during system maintenance, difficulty in drainage of pipe washing water in the well, and circulation disturbance to prevent slurry sedimentation and pipe plugging

[0005] The second object of the present invention is to provide a method for long-distance slurry filling and transportation in goafs of coal mines, which is also used to solve the problem that the plunger pump filling mining technology cannot transport materials at a long distance, the filling capacity is small, and the filling of slurry filling mining ends every time. It is troublesome to flush the pipeline after the end or when the system is overhauled, it is difficult to drain the pipe washing water in the well, and the circulation disturbance prevents the slurry from settling, and the pipe is blocked.

Images