A Coal Mining Method for Up and Down Coal Seams in Close Distance

Abstract

The invention discloses a method for up-down replacement collaborative mining of close distance coal seams. The method is suitable for use of underground coal mines. The method includes three stages of coal seam mining sequence design, mining roadway and working face excavating and mining replacement design and stoping interval design, according to the coal quality conditions and market requirements, a main coal mining seam and a cooperating coal mining seam are determined, a first mining face haulage way and a tail gate are drifted along a bottom plate of the main coal mining seam, and meanwhile, a cooperating mining face mining roadway is arranged in the stress decreasing area of the cooperating coal mining seam; and when the main mining face is stoped at a certain distance, the cooperating mining face is then stoped, the mining sequence is repeated until the close distance coal seams are stoped. The technical problem of close distance coal seam mining at the single-wing mining areais effectively solved, the mine replacement tension and working face mining effect are relieved, and safe, high-efficiency and high recovery mining of the close distance coal seams is realized.

Description

technical field [0001] The invention relates to a method for synergistic mining of short-distance coal seams by alternating up and down, and is especially suitable for the method of synergistic mining of short-distance coal seams used in the field of underground coal mining. Background technique [0002] With the long-term high-intensity mining of coal resources in eastern my country, the eastern coal resources have gradually been exhausted, and the focus of coal resource development has gradually shifted to the west. The coal resources in the western mining area are buried shallowly, present in the state of multi-coal seam occurrence, and the coal quality differences between coal seams are relatively large, and multi-coal seam mining is required to maximize the economic benefits of the mining area. Affected by geological conditions, some mines often use the single-wing mining method to mine coal resources in the mine field. The resulting problems are low mining replacement ...

AI Technical Summary

Problems solved by technology

Affected by geological conditions, some mines often use the single-wing mining method to mine coal resources in the mine field. The resulting problems are low mining replacement efficiency, and the working face is seriously affected by mining, which seriously restricts mine production efficiency and affects coal mine safety. Production

[0003] At present, there is no effective solution to such problems in China. Only a single upward mining method or a downward mining method is used to mine short-distance coal seams. The above methods cannot effectively solve the problem of low efficiency of matching mining caused by single mining.

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