Mining support method for steeply inclined and extremely thin ore bodies

Abstract

The invention provides a mining support method for a sharply inclined extremely thin ore body. The ore body adopts the upward horizontal layered filling method for back mining, and the mining support method of the steeply inclined extremely thin ore body adopts a combined support process of overall ground pressure control and stope working face maintenance. Use the joint support technology of anchor rod, anchor cable and steel belt to carry out the roof support operation; adopt the joint support technology of double ribs and anchor rod to carry out the hanging wall support operation; Operation and footwall waste rock filling operation, carry out the upward mining operation of the next cycle, to ensure that the construction personnel are always working under the support body. And during the mining process, horizontal concrete pillars and vertical concrete pillars with preset intervals are respectively poured along the upward mining direction and the direction of the mining operation face to complete the overall ground pressure control. The invention adopts the support method of overall-local double control, which improves the support efficiency and ensures the mining safety of the stope at the same time.

Description

technical field [0001] The invention relates to the technical field of mining support, in particular to a mining support method for a steeply inclined extremely thin ore body. Background technique [0002] Extremely thin inclined and sharply inclined broken ore bodies, the ore-rock boundary is obvious, the surrounding rock joints and fissures in the hanging wall are developed, in the form of massive and fragmented blocks, local invisible joints are developed, and there are generally soil layers between the ore bodies, and the footwall The development of joint fissures is not obvious, and it is a stable rock formation. At present, due to the small scale of the ore body and the rapid mining depth reduction of the steeply inclined thin veins, the development and mining workload is heavy. At present, the main technical difficulties faced in the mining are: 1) When the extremely thin and sharply inclined broken ore body is mined by the wall-cutting filling method, the stope spac...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that only the support of the stope operation face is carried out, and the problem of ground pressure appearance cannot be completely solved, that is, the deformation problem of the upper wall rock mass and roof is not fundamentally solved, and the safety of the stope There are still hidden dangers and the support efficiency has not been greatly improved

However, the structural design of the support column makes the working space of the stope limited, which is not convenient for the construction personnel to carry out mining operations, and the support cost is high and the support efficiency is limited.

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