a coal mining method

Abstract

The invention discloses a coal mining method, comprising the following steps: Step S1: pre-divide a thick coal seam into a top layer, a multi-layer middle layer and a bottom layer; Step S2: pre-detect the coal seam change in the bottom layer In the thin area, the layer of the middle layer above the bottom layer is called the first middle layer, and the layer of the middle layer above the first middle layer is called the second middle layer; Step S3: adopting a comprehensive The mining face sequentially mines the top layer, the middle layer and the bottom layer. In the coal mining method disclosed by the invention, wood stacks are set in advance in the first intermediate layer above the bottom layer, and the thinned area of ​​the coal layer at the bottom layer is filled, thereby artificially increasing the mining space of the fully mechanized working face. The height of the fully mechanized mining face can avoid breaking the floor rock, the fully mechanized mining face can smoothly pass through the coal seam thinning area, and the coal in the coal seam thinning area can be efficiently recovered.

Description

technical field [0001] The invention relates to the technical field of coal seam mining, in particular to a coal mining method. Background technique [0002] As we all know, the coal seam thinning area is more difficult to mine, and the mining efficiency is low. The reserves in the thinned area of ​​the coal seam also account for a part of the mine resources, but if the mining is abandoned, the coal resources will be wasted. At present, when the working face passes through the thinning area of ​​the local coal seam, blasting loosened rocks are used to forcibly cut through it. During the production process of the working face, additional processes such as drilling, charging, protection equipment, and blasting are added, resulting in more complicated production processes and more difficult safety control. [0003] In view of this, it is necessary to provide a method that can efficiently mine the thinned area of ​​the coal seam. SUMMARY OF THE INVENTION [0004] The purpose...

AI Technical Summary

Problems solved by technology

The reserves in the thinned area of ​​the coal seam also account for a part of the mine resources, but if the mining is abandoned, the coal resources will be wasted

At present, blasting loose rocks are used to forcefully cut through the thinning area of ​​the local coal seam on the working face. During the production process of the working face, drilling, charging, protection equipment, blasting and other processes are added, which makes the production process more complicated and safety control more difficult.

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