Underground stope artificial pillar expansion jacking device and construction method

Abstract

The invention discloses an underground stope artificial pillar expansion jacking device mounted between an artificial pillar foundation and a stope top plate. The underground stope artificial pillar expansion jacking device comprises an upper cover barrel, an inner sleeve and a lower cover barrel; the inner sleeve is positioned between the upper cover barrel and the lower cover barrel; the upper cover barrel has a barrel bottom I and a barrel wall I; the lower cover barrel has a barrel bottom II and a barrel wall II; the upper cover barrel is arranged above the inner sleeve; the outer wall of the inner sleeve is in clearance fit with the inner wall of the barrel wall I; the lower cover barrel covers the lower side of the inner sleeve; the outer wall of the inner sleeve is in clearance fit with the inner wall of the barrel wall II; a gravel cushion layer and an expansion agent cartridge are arranged in the inner sleeve from bottom to top in sequence; and gravels fill the expansion agent cartridge; and water drainage exhaust holes are respectively formed in the barrel bottom I and the barrel bottom II. The underground stope artificial pillar expansion jacking device has such advantages as simple structure, low production cost, convenience for use, capability of quickly and actively jacking, good jacking effect and high support force.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to an artificial point column expansion roofing device and a construction method for an underground stope. Background technique [0002] In the field of non-coal mine mining engineering, the open-stop mining method, as one of the three major mining methods, has always occupied an important position. The main feature of the open-field method is to divide the ore block into mine rooms and ore pillars, and the goaf formed when returning to the mine room uses the top pillars, bottom pillars, and inter-pillars set around the mine house and the left pillars in the mine house. Set up regular or irregular point columns to support the empty field formed after the mining of the mining house and maintain its stability. [0003] The ore pillars left by the open-field method are usually recovered uniformly at the end of mine production, but the recovery rate is low and th...

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Problems solved by technology

[0006] The present invention aims at the problems existing in the existing artificial point column roofing technology, and provides an artificial point column expansion roofing device with simple structure, low cost, convenient use, quick and active roofing, good roofing effect, and large supporting force. construction method

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