Parallel double-working-line reverse propulsion inclined coal seam strip mine mining method

Abstract

The invention provides a parallel double-working-line reverse propulsion inclined coal seam strip mine mining method. The mining method comprises the following steps that step 1, increased cost when a trench is reserved at the bottom of a pit and increased cost when the trench is not reserved at the bottom of the pit are determined; when the increased cost is relatively high when the trench is reserved at the bottom of the pit, no trench is reserved at the bottom of the pit; when the increased cost is relatively low when the trench is reserved at the bottom of the pit, the trench is reserved at the bottom of the pit; 2, a working line is arranged along the coal seam trend, advancing is conducted along the coal seam trend, longitudinal mining is started, and after longitudinal mining is reduced to the pit bottom, advancing is stopped after all flat plates of a working side are arranged to be in the minimum transportation width of an end side; 3, longitudinal mining is stopped, two parallel working lines are arranged on the two original longitudinal mining end slopes in the inclined direction of the coal seam, and transverse mining is started; and 4, after the two transverse mining working sides are pushed to the mining boundary, the longitudinal mining work continues to be carried out at the longitudinal mining stopping position in the step 2. The method is advantaged in that a comprehensive transportation distance is short, two-quantity reserving is simple, restriction of coal seam occurrence is avoided, and the inner drainage time is early.

Description

Technical field [0001] The present invention belongs to the field of open-air mining technology, and specifically, the present invention relates to a tilt coal seam open-air mine mining method for reverse propulsion of parallel dual workline. Background technique [0002] The inclined coal seam open-piranium is relatively large in my country's open-air mine. It mainly has agreed and transversely collected two work lines during mining. Expenditure is to arrange the peeled stripping line along the ore body, and the vertical mineral movement is advanced, and the opening groove can be arranged in the upper disc of the mineral, which is conducive to reducing the loss of ore, depletion. The horizontal mining is a tendency to arrange a line along the ore body, and the vertical mineral tendency is advanced. The internal tunnel of the taking time is smaller, the infrastructure is smaller. When the inclined coal seam open-pit mine, when the advancement of the absorbed project, the peeling ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for mining open-pit mines with inclined coal seams in reverse direction with parallel double working lines, to at least solve the problem that the current method of converting from longitudinal mining to horizontal mining is restricted by the stripping ratio, and the length of the working lines is limited, making it difficult to meet the requirements of horizontal mining. Production requirements and other issues

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