face mining method

Abstract

The invention relates to an underground mineral mining method and discloses a working face mining method. The mining process comprises the following steps of before mining, performing constructing onworking faces to form a cut hole so as to form a starting point of mining on the working faces; and performing gob-side entry retaining while mining at the two ends of each working face to respectively form a first gate way and a second gate way, wherein the first gate way and the second gate way form ventilation and transportation channels of the working faces. The mining method for bilateral entry retaining has the advantages and positive effects that compared with the prior art, the underground mineral mining method can ensure the ventilation of a whole coal mining area without the need ofperforming tunneling around the mining area to prepare a roadway; the gate ways do not need to be tunneled in advance when each working face in the mining area is mined, but the gate ways are formed after coal mining, thereby greatly reducing the huge workload caused by tunneling the gate ways in advance and greatly shortening the well construction period; and simultaneously, no coal pillars needto be reserved, thereby saving resources.

Description

technical field [0001] The invention relates to a mining method of underground minerals, in particular to a mining method or mining method of underground coal mining. Background technique [0002] like figure 1 As shown, in the Chinese invention patent with the publication number CN105240013A, a longwall mining N00 method is disclosed, which includes at least one mining area 2, and a return air downhill passage 25 and a track downhill passage 26 are directly arranged on one side of the mining area 2. A belt downhill passage 28 is provided in communication with the other side from the wellhead in the production area. The return air downhill passage 25, the track downhill passage 26 and the belt downhill passage 28 are all connected to the wellhead, and the belt downhill passage 28 surrounds the entire mining area 2 and then connects with the return air downhill passage 25, forming the overall ventilation system of the mining area 2. [0003] Using the above mining mode, bef...

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Problems solved by technology

[0005] Aiming at the problems existing in the prior art that the roadway must be excavated in advance for coal mining in the mining area, resulting in a large amount of engineering work in the early stage, tight excavation continuity, frequent safety accidents during the excavation process, and waste of resources caused by leaving coal pillars, the present disclosure aims at Due to the above limitations, the following technical problems need to be solved: the first mining face must be excavated in advance

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