Method of active coupling support in time and space for control of minimum deformation of surrounding rock of deep well roadway

Abstract

The invention discloses a method for active coupling support in the time and space for control of minimum deformation of surrounding rocks of a deep well roadway, which is characterized by comprising: excavating a roadway according to the shape of the cross section of the roadway; immediately supporting the surrounding rocks of the roadway with steel bar nets and high-strength prestressed anchor rods so as to promptly limit the deformation of the surrounding rocks; reinforcing the support with high-strength prestressed anchor ropes in the middle of the top plate of the roadway and two spandrels of the roadway to inhibit expansion of destruction; within 20-30 days after roadway tunneling, installing grouted anchor tubes on the surrounding rocks of the top plate, two shoulder supports and a bottom plate of the roadway, and grouting cement slurry into the surrounding rocks of the roadway for grouting reinforcement to maintain the stability of the surrounding rocks; and finally backfilling concrete to level the bottom plate of the roadway. In the method, supports of different strengths are emphasized in different periods and on different parts of the roadway, the best active coupling support in the time and space can be achieved for roadway supporting, the deformation of the surrounding rocks of the roadway can be controlled within the minimum range, the repair of the roadway can be avoided, and the long-term safety and stability of the roadway can be achieved.

Description

technical field [0001] The invention relates to a support method for a deep well roadway, more specifically, a space-time coupling active support method for controlling the minimum deformation of surrounding rock in a deep well roadway, and is especially suitable for deep well roadway with continuous large deformation of surrounding rock and strong bottom. . Background technique [0002] Effectively controlling the deformation of the surrounding rock in the roadway and ensuring the safety and smoothness of the roadway are the primary conditions for safe production in mines. At present, most of the mines in our country have entered into deep mining one after another. After entering the deep mining, the ground stress is high, the impact of mining is severe, the surrounding rock structure is soft, and the fault structure is developed. Surrounding rock control methods such as the new Austrian method, which takes the core concept of allowing certain deformation of the surroundi...

AI Technical Summary

Problems solved by technology

However, when such methods are applied in deep mine roadways, the damage continues to expand after a certain deformation of the surrounding rock, which cannot be controlled, resulting in the continuous expansion of the deformation and damage range of the surrounding rock, which eventually leads to the instability of the surrounding rock in the roadway.

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