Filling and mining method of coal gases

Abstract

The invention relates to a filling and mining method of coal gases, comprising the following steps: arranging a gas pressurization room on the ground and then arranging an underground gas booster pump connected with a ground high-pressure gas storage tank pipeline in a mining region haulage way in front of an underground coal mining working face; distributing a row of cylindrical rubber airbags in a gob behind the coal mining working face when the coal mining working face is advanced for 5-8 m from the open-off cut; filling gas into the cylindrical rubber airbags till the top is tight; sealing the openings of the cylindrical rubber airbags to finish filling gas into one cylindrical rubber airbag; continuously distributing a row of cylindrical rubber airbags behind the row of gas-filling cylindrical rubber airbags when the coal mining working face is advanced for each step along with the continuous advance of the coal mining working face and charging gas in rows till finishing the gas filling and supporting in the whole gob. In the invention, the filling method is simple, the gas filling speed is high, the cost is low and the filling capacity is great, and the method is convenient for onsite underground operation.

Description

technical field [0001] The invention relates to a coal mine gas filling mining method, which is especially suitable for gas filling of gobs in coal mining and mining working faces with small inclination angles of coal seams. Background technique [0002] Filling mining technology is of great significance to the liberation of "three under" coal pressing, so some coal mines, scientific research and design units have been researching and exploring it. Due to the realization of stope mechanized mining and filling, filling mining has developed from a low-yield, low-efficiency mining method to a high-yield, high-efficiency mining method. At present, my country's coal mine filling mining mainly adopts filling processes such as cemented filling, gangue filling, paste filling and high-water material filling. These filling processes have achieved good filling effects, and played a certain role in solving the "three-down" coal pressing problem and controlling the movement and deformat...

AI Technical Summary

Problems solved by technology

However, the current filling methods have disadvantages such as difficulty in filling material sources, large requirements for filling pipelines or high-power pumping equipment, high transportation costs of filling materials, and low filling capacity, which limit the promotion of filling mining technology.

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