Method for creating internal dumping conditions of strip mine

Abstract

The invention discloses a method for creating internal dumping conditions of a strip mine, which is characterized by comprising the steps of adopting an exploitation zone, exploiting in a segmented way, carrying out steep slope mining advancement to create internal dumping conditions, and also comprising the step of sufficiently utilizing the areas of the stope and the blasting warning line as a 'transfer station' to carry out internal dumping. The step of internal dumping is carried out according to the following steps: (1) firstly exploiting stripped rocks, and adopting a footstep separated manner to temporarily stack the rocks on the other part of the rocks which are not exploited temporarily in the range of 300m blasting warning line away from the upper opening of the stope; (2) constantly stretching downwards and advancing lengthwise along the stope, so that the primarily-exploited part reaches the final boundary first, and the rocks on the other part are moved to the mining pit of the primarily-exploited part, wherein a footstep separated manner is adopted for stacking; and (3) continuing to advance lengthwise in the stope to cause the space of the mining pit to be enlarged constantly, and moving the rocks in the range of the blasting warning line into the mining pit gradually. The method has the advantages of not occupying other lands, prolonging the service life of the internal dump, and saving cost.

Description

technical field [0001] The invention belongs to the technical field of mining, and relates to a soil-discharging process among five open-pit mining techniques, in particular to a method for creating soil-discharging conditions in an open-pit mine. This method is not only suitable for coal mines mined by divisions and sections, but also for other non-coal open-pit mines. Background technique [0002] Open-pit mining is the main method of mining mineral resources in my country, which has the characteristics of large production scale and good safety. Compared with underground mining, there are many advantages, but the disadvantage is also very obvious, that is, a large amount of rock must be stripped while mining ore. Compared with underground mining waste rock dumps, surface mining dumps occupy a much larger area. [0003] Internal discharge means that during the open-pit mining process, the stripped waste rock is not discharged outside the stope, but inside the open-pit sto...

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Problems solved by technology

[0007] The purpose of the present invention is exactly for the above-mentioned defect that prior art exists, provides a kind of method that creates the soil discharge condition in the open-pit mine, solves metal, non-metal ore deposit mostly is inclined or sharply inclined ore body, and strike length is short, inclination extends greatly, The distribution range is small, and it is impossible to use subdivision and segmental mining to realize the problem of internal soil discharge. This method is not only suitable for coal mines with subdivision and segmental mining, but also suitable for other non-coal open-pit mines

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