Method for creating internal dumping conditions of strip mine

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.