Novel horizontal ditching method for deep open pit mine

Abstract

The invention discloses a novel horizontal ditching method for a deep open pit mine and relates to the field of mining of deep open pit mines. The defects of high construction requirements and large blasting harmful effects of a deep open pit stope with a high and steep slope and a complex drainage system in a full-section high ditching blasting mode are overcome. According to the technical scheme, the novel horizontal ditching method for the deep open pit mine comprises the steps that firstly, full-section high middle cut blasting is conducted in a clearance area at the bottom of the stope, a free face for follow-up ditching operation is formed, the clearance area is dug out after blasting, and drainage is conducted; then, a ditching area is defined, in the ditching area, the position, corresponding to the top of an access ditch, in the ditching area serves as a starting point, drilling, explosive charging and blasting are conducted on the ground from shallow to deep according to the designed slope ratio of the access ditch in the downward direction of the access ditch, then loose parts are dug away, and a slope connection way is formed; and finally, layered blasting and digging are carried out on the bottom area of the slope connection way, and the access ditch is built. The novel horizontal ditching method for the deep open pit mine is used for novel horizontal ditching of the deep open pit mine.

Description

technical field [0001] The invention relates to the mining field of deep concave open-pit mines, in particular to a method for ditching a new level of deep concave open-pit mines by means of blasting. Background technique [0002] The new level preparation is the development preparation work that must be carried out for the extension and continuous production of the open-pit mine. It includes the new level of entry and exit trenches, opening section trenches, and the expansion works required to prepare the entry and exit trenches for the next new level, as well as other necessary project. The method of preparation for the new level and the size of the engineering quantity are related to the occurrence conditions of the deposit, the shape of the open pit, the mining procedure adopted, the production process system, the development method, and the equipment used for mining, loading and transportation. Compared with the mining and stripping work during the normal production pe...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a new horizontal ditching method for deep concave open-pit mines, which solves the high construction requirements and harmful effects of blasting in deep concave open-pit stopes with high steep slopes and complex drainage systems that adopt the full-section high ditching blasting method Big deficiency

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