A new level preparation method to increase the annual decline rate of deep mining in open pit mines
A technology of deep mining and preparation method, which is applied in surface mining, earth square drilling, underground mining, etc. It can solve the problems of long preparation period for the new level, large amount of preparation work for the new level, premature production reduction, etc., and achieve comprehensive mining cost reduction , reduce the depth of trenching and blasting holes, and reduce the effect of clamping
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[0040] For describing the present invention better, below in conjunction with accompanying drawing, a kind of new level preparation method of the present invention that improves deep mining annual decline speed of open-pit mine is described in further detail.
[0041] A new level preparation method of the present invention to improve the annual decline rate of deep mining in open-pit mines divides the deep steps in open-pit mines into upper and lower layers, and the heights of the upper and lower layers are 5m to 8m; The upper layer and the lower layer are respectively designed with access ditch and opening ditch, and the access ditch of the corresponding layer is inclined downward and connected with the opening ditch of the corresponding layer.
[0042] Depend on figure 1 As can be seen from the flow chart of the implementation of a new level preparation method for improving the annual rate of decline in the deep mining of the present invention, the inventive method is carrie...
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