Mining procedure of inclined seam narrow and long strip mine

Abstract

The invention provides a mining procedure of an inclined seam narrow and long strip mine, and belongs to the technical field of strip mine mining. In the mining process, the strip mine is divided into a first mining area and a second mining area, and the first mining area is firstly mined; work lines are longitudinally arranged in the first mining area in the early stage, the work line arrangement direction of lower steps is gradually regulated when upper steps reach the boundary, therefore, the L-shaped work line is adopted by the lower steps, and the length of the transverse mining work line of the lower steps is gradually increased until all the lower steps achieve transverse mining; when the first mining area approaches to a closed state, inclined mining starts to be conducted from the first mining area to the second mining area for transition; after transition is completed, a work line is arranged in a certain angle in the inclined direction and advanced in the strike direction, and inclined mining is conducted; when the upper portion of the second mining area is near the boundary, the advancing speed from the position near the boundary to the position on one side of the boundary is gradually increased, so that the length of the inclined mining work line is increased until the strip mine is closed. According to the mining procedure, the capital construction stripping volume of the strip mine can be decreased, stable internal discharging and steep slope mining are achieved, the production stripping ratio is balanced, and the economic benefits are increased.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to a mining procedure for narrow and long open-pit mines with inclined coal seams. Background technique [0002] Narrow and long open-pit mines with inclined coal seams are generally longer in the vertical direction and narrower in the horizontal direction. At present, the commonly used mining procedures mainly include "longitudinal mining within the partition" and "horizontal mining and internal row". The former forms the internal drainage space slowly, the slope stability of the internal dump site is poor, the ore and rock transportation distance is large, and the stripping ratio is unbalanced; while the latter has a large amount of initial infrastructure construction, difficult coal seam selection and mining, and narrow operating space. Therefore, the current commonly used mining procedures will cause the narrow and long open-pit mines with inclined coal seam...

AI Technical Summary

Problems solved by technology

The former forms the internal drainage space slowly, the slope stability of the internal dump site is poor, the ore and rock transportation distance is large, and the stripping ratio is unbalanced; while the latter has a large amount of initial infrastructure construction, difficult coal seam s

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