Interval skip-mining type filling coal mining method

Abstract

The invention provides an interval skip-mining type filling coal mining method and belongs to the technical field of coal mine filling coal mining methods. The interval skip-mining type filling coal mining method comprises the steps that a first open-off cut is dug at the tail end of a butt entry, a second open-off cut is dug a certain distance away from the first open-off cut, and mining is conducted at the position of the second open-off cut with the wall type system coal mining method after the second open-off cut is well dug; a third open-off cut is dug a certain distance away from the second open-off cut, a gob formed after mining is conducted at the position of the second open-off cut is filled while the third open-off cut is dug, and the rest operation is conducted by analogy till mining is conducted on a mining stopping line. By the adoption of the interval skip-mining type filling coal mining method, mining can be conducted under the condition that the two ends are supported, sequential mining and sequential filling are achieved, the integrity of a base plate of a roof is guaranteed, movement of overlying rock is reduced, and the purpose of surface subsidence control is achieved; after mining with filling is completed, coal pillars left after mining do not need to be filled, filling materials are reduced, and filling cost is reduced.

Description

technical field [0001] The invention belongs to the field of filling coal mining methods in coal mines, and in particular relates to a filling coal mining method with skip mining at intervals. Background technique [0002] Coal resources are depleting day by day, and coal mining under buildings, under railways, under water bodies and above confined water (“three down ones”) has become an important problem facing coal mining. The coal mining methods currently used include longwall filling mining method, short wall filling coal mining method, and roadway filling coal mining method, but the longwall coal mining method cannot effectively control the stability of the roof and floor during mining, and the short wall mining method cannot effectively control the stability of the roof and floor during mining. The coal mining method has a high filling rate and consumes a lot of materials. The roadway coal mining method has low recovery rate, complex process and high labor intensity. ...

AI Technical Summary

Problems solved by technology

The coal mining methods currently used include longwall filling mining method, short wall filling coal mining method, and roadway filling coal mining method, but the longwall coal mining method cannot effectively control the stability of the roof and floor during mining, and the short wall mining method cannot effectively control the stability of the roof and floor during mining. The coal mining method has a high filling rate and consumes a lot of materials

The roadway coal mining method has low recovery rate, complex process and high labor intensity

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