The open field mining method refers to various methods in the natural support mining law other than the mining and mining method, while some refer to the whole method of natural support mining; some also refer to the stage mining method and the transverse strut mining. Law , or only comprehensive law mining and room and pillar mining laws.
In the process of mining, the empty field mining method divides the ore into a mine house and a pillar. The first step is to first mine the house, and the second step is to mine the column. When returning to the mining room, the stope exists in the form of open space, and is only maintained by the strength of the pillar and the surrounding rock itself. After the mining house is finished, it is necessary to return to the mining column and the goaf in time. In general, returning to the mining column and processing the goaf are carried out simultaneously; sometimes in order to improve the recovery conditions of the pillar, the mine is filled with filler and then returned to the mining column by other mining methods. Vodka Bottle,Oem Vodka Bottle,Oem Vodka Glass Bottle,Engraved Vodka Glass Bottle
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