Mine downward deep hole protection device and protection method

Abstract

The invention provides a mine downward deep hole protection device and method. The mine downward deep hole protection device comprises an in-hole protection wall structure, a covering structure and a blocking structure. The in-hole retaining wall structure comprises a sleeve arranged along the inner side wall of the deep hole, and an upper port of the sleeve is flush with the ballast surface of an orifice of the deep hole. The covering structure comprises an insertion fixing structure arranged in the sleeve and a cover body arranged at the top of the sleeve. The insertion fixing structure comprises at least two rod-shaped structures which are vertically arranged on the bottom surface of the cover body, and the distance between the adjacent rod-shaped structures is smaller than the internal diameter of the sleeve. The plugging structure comprises a powder structure arranged on the periphery of the top of the cover body. By means of the method, the problems that in the prior art, when a traditional woven bag is adopted for filling rock powder to cover and protect a deep hole opening, the woven bag is prone to damage, the rock powder is prone to scattering to block a blast hole, and the protection effect is poor can be solved.

Description

technical field [0001] The invention belongs to the technical field of mine blasting, and more specifically relates to a protection device and a protection method for a downward deep hole in a mine. Background technique [0002] When underground mines are mined by downward deep hole blasting, due to the large amount of dross and gravel left in the previous rock drilling process, and after the perforation drilling is completed, the rock dust discharged from the rock drilling will remain and accumulate in the hole. Around the mouth, vehicles entering and exiting the chamber will cause different degrees of subsidence at the opening of the deep hole, resulting in blockage of the deep hole and blind holes, which will affect the blasting effect in the later stage. [0003] In order to ensure the integrity of the orifice, improve the utilization rate of the blast hole, and ensure the effective length of the deep hole, the orifice must be protected. At present, the traditional prot...

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Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a protection device and protection method for deep holes in mines, so as to solve the problem of using traditional woven bags filled with rock powder to cover and protect the openings of deep holes in the prior art. When the method is used, it is easy to cause problems such as the woven bag is easy to be damaged, the rock powder is easy to scatter and block the blast holes, and the protection effect is poor.

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