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(1) The shallow hole retention method is a kind of empty field method and has the common characteristics of the empty field method. It is also a two-step mining process that divides the ore into a mine and a pillar. First mining room, rear mining column.
(1) The shallow hole retention method is a kind of empty field method and has the common characteristics of the empty field method. It is also a two-step mining process that divides the ore into a mine and a pillar. First mining room, rear mining column.
(2) This mining method workers can work directly under the large exposed surface of the mine.
(3) The shallow hole retention method is to stratify back to the mining room from the bottom up, using shallow holes to break the ore.
(4) Each time the ore is collected, about 1/3 of the ore is released from the funnel by its own weight (local ore), leaving 2/3 ore as a temporary workbench for the next rock drilling and blasting work. When all the mines are mined, the remaining 2/3 of the ore is released (this is called a large amount of ore). The remaining ore cannot be used as the main means of ground pressure management.
(5) The rock driller is standing on the pile of mines for work.
This mining method is mainly applicable to: steep ore thin and thin ore bodies with stable ore and surrounding rock. Since a large amount of ore accumulates in the stope, the ore is required to be non-oxidizing, agglomerating and self-igniting.
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