Coal mining method with three steps

Abstract

The invention relates a mining method of coals stored under waters, buildings or railways, which is characterized in that network mining, permanent support and integrated construction are carried out to coal strips and blocks stored under the waters, the buildings orthe railways; the network mining includes that a room, five to six meters wide from the bottom to the top is mined in a coal mine under the waters, the buildings or the railways, 10 to 20m posts are left and the room and the posts form network shape; the permanent support includes that the mined room is treated with the permanent support in time, and the permanent support has large intensity to guarantee that the deformation of the top plate and the two sides is comparatively small and ground above the waters, or of the buildings or the railways does not sink; the integrated construction includes that the technologies of hole drilling, explosion, coal loading and transport are adopted and equipment with integrated support is used for carrying out construction to the mined room. The mining method of the invention has the advantages that resource recovery rate is improved, investment is low and return rate is high; and not only an underground treatment space is provided for the recrements of a mine well, but also filling materials are provided for the mining under the waters, the buildings or the railways, thereby realizing the advantages of safe production, etc.

Description

Technical field [0001] The invention belongs to coal mining technology, and particularly relates to three coal mining suitable for buildings, railways and highways, and under water bodies. Background technique [0002] At present, there are no mature, high-efficiency and high-return technologies for coal mining in my country’s buildings, railways, roads, and water bodies (hereinafter referred to as "three under"). However, the recoverable reserves of three under pressure in various coal mines in my country are huge. Being able to mine will improve economic and social benefits. Summary of the invention [0003] The purpose of the present invention is to provide a triple coal mining technology for buildings, railways and highways, and under water bodies, aiming at the deficiencies of existing coal mining technologies. [0004] In order to achieve the above objective, the technical solution of the present invention is: [0005] A three-under coal mining method, which is characteriz...

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Problems solved by technology

[0002] At present, there is no mature, high-efficiency and high-return technology for coal mining in buildings, railways, highways, and water bodies (hereinafter referred to as "three-down") coal mining in my country, but the recoverable reserves of coal in various types of coal mines in China are huge. Being able to mine will improve economic and social benefits

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