Loess-filling coal-mining method in a coal mine

Abstract

The invention relates to a loess-filling coal-mining method in a coal mine, which solves the problems of relatively low mechanization degree, high production cost, poor production efficiency and difficulty in realizing large-scale mining in the existing filling coal-mining method in the coal mine. The method comprises a reverse transportation process, a filling coal-mining process and a filling coal-mining process without coal pillars, wherein, in the reverse transportation process, loess is thrown from a charging mine opening and transported to a coal-mining working surface for throwing; in the filling coal-mining process, firstly coal cutting is carried out on a coal-mining area, a certain filling space is reserved, and then coal cutting operation and filling operation are performed simultaneously; and in the filling coal-mining process without the coal pillars, a roadway is reserved along a mine goaf. By means of a rational design, the loess-filling coal-mining method in the coal mine of the invention can maximize recovery rate of coal resources, effectively avoid surface subsidence, greatly lower filling cost, improve filling and coal-mining mechanization degree, and is of great significance to field-making in barren mountains, ecological protection and resource conservation.

Description

technical field [0001] The invention relates to an underground coal mining method of coal mine filling, in particular to an underground loess filling coal mining method of a coal mine. Background technique [0002] Gob filling mining in underground coal mines has been done some research abroad as early as the 1950s, mainly to achieve the purpose of mining coal under pressure in buildings through this method. After several decades of mining, the problem of exhaustion of coal resources in many coal enterprises in the middle and lower reaches of the Yellow River has become increasingly prominent. These enterprises have also done a lot of research on filling mining in recent years and achieved some results. From the perspective of the researched filling methods, there are mainly two types: paste and solid: the paste filling technology originated from tailings treatment during iron ore mining, and relevant experimental research has been done in Taiping Mine in Shandong and Fengfe...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of relatively low degree of mechanization, high production cost, poor production efficiency and difficulty in realizing large-scale mining in the existing underground coal mining method of filling coal mines, the present invention provides an underground loess filling coal mining method in coal mines