Large-section rapid high-strength blocking method

Abstract

The invention discloses a large-section rapid high-strength blocking method, which aims at a mine goaf, and comprises but is not limited to the following main process steps and conditions: determining the position of a retaining wall in an ore removal channel of a stope or other channels needing to be blocked; the retaining wall is arranged to be an arched retaining wall, and the protruding side of the arched retaining wall is close to the goaf; a frame of the arched retaining wall is composed of round steel, a first-layer steel wire mesh, linen, a U-shaped steel wire mesh and a second-layer steel wire mesh from inside to outside. Concrete is sprayed to the frame of the arched retaining wall, the arched retaining wall of a reinforced concrete structure is formed after solidification, the bearing capacity of the retaining wall can be greatly improved, shutdown is not needed when the retaining wall is filled, the filling efficiency is greatly improved, a formwork does not need to be built during retaining wall construction, construction is rapid, and cost is low; the device has the advantages that the filling operation is continuous and efficient, the economic benefit of a mine is improved, the operation is convenient, safe and reliable, and the like.

Description

technical field [0001] The invention relates to the technical field of metal mines, in particular to a large-section fast and high-strength sealing method, which is suitable for the application of goaf passage sealing with continuous filling and rapid rise of slurry surface. Background technique [0002] In recent years, backfill mining methods have been widely used in mines, and innovation and progress have been made in the development of backfill mining methods. The current filling technology mainly includes full tailings cement filling, fine stone concrete pumping filling, full tailings paste pumping filling and high water velocity solidification filling. However, no matter what filling process is used, retaining walls are required to isolate the area to be filled. The types of retaining walls used in mines include wooden retaining walls, brick-concrete retaining walls, flexible retaining walls and reinforced concrete retaining walls. Generally speaking, wood retaining w...

AI Technical Summary

Problems solved by technology

Of course, no matter what kind of retaining wall is used, once the retaining wall is filled, it generally needs to be filled in stages, and the liquid level of each filling should not exceed 1.5m, and the filling can only be continued after the slurry reaches the final setting. The filling interval is generally 1 to 2 days. Because the above-mentioned retaining walls have a rapid rise in the slurry surface, resulting in an increase in the side pressure of the retaining wall, it is difficult to meet the requirements of one-time filling of the retaining wall, and the low efficiency of batch filling is a big problem. question

[0003] In order to solve the above problems, Chinese patent CN 215633117 U discloses "a reinforced concrete retaining wall for an underground stope". However, the problem of increasing the side pressure of the retaining wall due to the rapid rise of the slurry surface during filling has not been touched; Chinese patent CN208416605U discloses "a high-concentration tailings cemented filling reinforced concrete retaining wall" , the retaining wall can effectively isolate high-concentration tailings cemented filling, prevent the retaining wall from collapsing, avoid tailings slurry accidents in the stope, and ensure safe production in the mine. The problem of increasing the side pressure of the retaining wall has not been touched; Chinese patent CN 215830552 U discloses "a kind of frozen filling retaining wall for mine underground", which can solve the cost of filling the retaining wall in one step when filling underground in alpine areas, Problems such as construction and demolition have also not been touched on the problem that the slurry surface rises too fast during filling, which causes the side pressure of the retaining wall to increase

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