06-06-2023 дата публикации
Номер: CN116220686A
Принадлежит:
The invention relates to a mining method for thickness change of a steeply inclined thick ore body before pinching, which comprises the following steps of: (1) dividing layered elevation lines according to the change of the thickness of the ore body in an engineering layout plan before the pinching of the steeply inclined thick ore body, and designing a drift and an in-vein rock drilling roadway according to the thickness; (2) determining the positions of a hanging wall in-vein cutting roadway, an in-vein rock drilling roadway for in-vein stoping along the trend and an out-vein transportation roadway, and performing construction; (3), middle-length hole recovery design is carried out, and a hanging wall cutting roadway middle-length hole row surface line, an access recovery middle-length hole row surface line, an access cutting groove middle-length hole row surface line and a middle-length hole row surface line in a vein along the trend are formed; then, a cutting raise is constructed in ...
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