Multi-patio vertical-striping shrinkage mining method for medium-thickness steeply-inclined stoping

Abstract

The invention relates to the technical field of ore body mining, and particularly relates to a multi-patio vertical-striping shrinkage mining method for medium-thickness steeply-inclined stoping. The multi-patio vertical-striping shallow-hole shrinkage mining method is a mining method that on the basis of a pillarless -free shallow-hole shrinkage method, stage division is changed into vertical striping from horizontal subsection, a plurality of cutting patios are used as operation space and a stoping workbench, and unstable medium-thickness steeply-inclined ore bodies are stoped in a shallow-hole ore breaking mode. According to the multi-patio vertical-striping shrinkage mining method, a plurality of cutting patios are dug in a chamber to vertically divide the chamber into a plurality of strips, during stoping, cutting roadways and the cutting patios are used as free surfaces, reserved ore piles are used as a working platform, horizontal shallow holes are drilled from the patios to the periphery for horizontal shallow-hole ore breaking, and stoping is conducted layer by layer from bottom to top. The multi-patio vertical-striping shrinkage mining method has the advantages that a clear multi-echelon working surface is achieved, operation is convenient, the mining efficiency is high, operation is safe, the dilution rate of broken ore is small, and personnel do not need to enter ore breaking space for operation.

Description

technical field [0001] The invention relates to the technical field of ore body mining, in particular to a multi-raise vertical slitting and retaining ore mining method used in medium-thick and steeply inclined mining. Background technique [0002] Penglai Mining Hougezhuang Coal Mine 10 middle section 17 line, the upper part of the ore block is controlled by the 9th middle section along the vein project, the lower part is controlled by the 10 middle section along the vein project, the stage height is 40m, the ore block is 82m long, and the ore body is pyrite sericite Granite is the main rock, the intercalated stone is lamprophyre, the surrounding rock is granodiorite, the local joints of the ore rocks are developed, the ore body is unstable, the ore body strikes ±18°-25°, dips to SE, and the dip angle is 55°-65° , with an average thickness of 4m, the thickness of the ore body varies greatly along the strike and inclination, and due to early civil mining, there is a large ga...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of multi-raise vertically slitting ore retention mining method used in medium-thick and steeply inclined mining, to solve the above-mentioned background technology because the ore body of the 17th line of the middle section of 10 is not stable or moderately stable. During the mining process, it is easy to cause the problem of large-scale caving of the roof

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