An Integrated Mining Technology with No Drilling and No Coal Pillar

Abstract

The invention discloses a mining / setting-up integrated mining technology without tunneling and coal pillars, which includes the following steps: selecting a mining area and dividing the mining area into large section working surfaces and small section working surfaces; performing construction of in-advance guiding roadways and setting in-advance open-off cuts, thus completing preparation work of mining; firstly, mining the small section working surfaces, after two of the small section working surfaces are mined, mining the large section working surfaces in a retreating mining mode, wherein theutilized secondary small section retrained roadway is subjected to roof cutting and pressure relieving for secondary roadway retraining, and a Y-shaped ventilating system is formed in the large section working surfaces; then performing secondary cyclic mining, wherein the utilized small section retrained roadway in the secondary circulation is subjected to secondary roof cutting and roadway retraining so that a Y-shaped ventilating system is formed in the large section working surfaces; and alternately mining the small section working surfaces and the large section working surfaces until themining area is mined completely. The method is free of crossheading tunneling and is free of coal pillars, allows continuous mining, and has important significance of increasing resource recovery ratein a mine, reducing tunneling, increasing production efficiency, cutting payrolls and increasing efficiency, and has great practicability.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to an integrated mining process without tunneling and coal pillar mining and retention. Background technique [0002] At the present stage, coal production in my country is mostly dominated by longwall retreat mining. The mining area is mainly divided into several sections, and the production is organized with the section working face as the production unit. Generally, the working face roadway and the cut eye in the section are excavated first. After the working face equipment is installed in place, back mining is carried out, and the next section is excavated to connect the roadway of the working face at the same time, and the preparation of the roadway of the connecting working face is completed before the mining of the mining face is completed, and then the house is moved and reversed, and a new cycle is restarted until the whole The mining section of the min...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the tension in production continuity caused by the traditional mining method of digging two lanes on one side and leaving coal pillars in the current longwall mining, the engineering volume of the well lane is large, the waste of resources is more, the production cost is high, and the production efficiency is low. In order to solve the practical problems, a non-excavation and coal pillar-free integrated mining technology is provided. Through reasonable mining process arrangements, the mining and retention integrated mining without coal pillars can be realized, and the unbalanced mining and continuous tension caused by the traditional excavation before mining are avoided. Avoid the waste of coal resources caused by leaving large coal pillars

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