Roadway type cemented filling mining method of nearly flat seam

Abstract

The embodiment of the invention provides a roadway type cemented filling mining method of a nearly flat seam, and relates to the technical field of coal mining processes. The roadway type cemented filling mining method comprises the steps of discharging coal from branch roadways at intervals in a driving long-wall working surface direction, filling step by step, and completing the filling of a previous branch roadway while a next branch roadway is tunneled so as to discharge coal; after one or more branch roadways are mined, connecting a first high-pressure hose to a first branch pipeline, extending the first high-pressure hose into the branch roadways, connecting a second high-pressure hose to a second branch pipeline, extending the second high-pressure hose into the branch roadways, andrespectively arranging flow regulating valves in the connecting positions of a three-way pipe and the first high-pressure hose as well as an upper interface of a four-way pipe and the second high-pressure hose; and arranging slurry blocking formworks on both ends of the branch roadways; opening a main valve and the regulating valves, starting a filling pump, grouting goaf from top to bottom through the first high-pressure hose and the second high-pressure hose, and grouting the hoses on both ends at the same time till the branch roadways are full after the filling height in the branch roadwaysreaches 80%. The roof contact compactness is conveniently guaranteed, and the filling mining efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal mining technology, in particular to a roadway cemented filling mining method for near-horizontal coal seams. Background technique [0002] The traditional caving coal seam mining will cause the overlying rock to fall and break, destroy the underground water-bearing rock system, cause surface subsidence and surface cracks, endanger the surface buildings, cause water resource loss and ecological environment damage. [0003] In recent years, the focus of my country's coal development has gradually shifted to the west. Due to the large reserves of near-horizontal coal seams in the western region, the ecological environment is fragile and the sensitivity to mining disturbance is strong. In order to practice the concept of "lucid waters and green mountains are golden mountains and silver mountains", it is urgent to find a suitable mining method, and filling mining, as an important part of green mining tech...

AI Technical Summary

Problems solved by technology

[0002] The traditional caving coal seam mining will cause the overlying rock to fall and break, destroy the underground water-bearing rock system, cause surface subsidence and surface cracks, endanger the surface buildings, cause water resource loss and ecological environment damage

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