Soft rock layered grouting reinforcement method based on hydraulic fracturing permeability improvement

Abstract

The invention discloses a soft rock layered grouting reinforcement method based on hydraulic fracturing permeability improvement, and relates to the field of mine underground supporting. The two technical means of hydraulic fracturing and grouting reinforcement are combined in a designated soft rock area for permeability increasing for grouting reinforcement, and a novel roadway supporting means can be formed. Reinforcing is conducted according to the following steps that S1, a hole is drilled in the soft rock top plate; s2, hydraulic fracturing is carried out; and S3, grouting reinforcement is conducted. Compared with the mode of reinforcing the soft rock only through grouting, the combination of the two technologies enables a grout framework in the soft rock to be more compact, the compaction effect on the internal rock mass is more sufficient, the effect of improving the deformation rigidity and the shear strength of the soft rock is more obvious, and the strength and the integrity of the soft rock can be effectively improved.

Description

technical field [0001] The invention relates to the field of mine underground support, in particular to a soft rock layered grouting reinforcement method based on hydraulic fracturing and permeability enhancement. Background technique [0002] At present, as the mining field gradually extends to the depth of 1,000 meters, the control of mine pressure and rock stability is particularly important. During the mining process of the underground working face of the mine, soft rock roofs or surrounding rocks are often encountered, and the soft rock has poor bearing capacity. adversely affect the propulsion efficiency. Under the influence of mine pressure and mining stress, the deformation of the two sides of the roadway is large, and the phenomenon of roof caving is serious, especially when the rock mass is soft rock, the roof and surrounding rock are prone to large deformation, which increases the difficulty of support and production safety. Without reasonable reinforcement metho...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above problems, the present invention proposes a layered grouting reinforcement method for soft rock based on hydraulic fracturing and anti-permeability, which can solve the problem of insufficient overall strength of soft rock. The two technical methods of hydraulic fracturing and grouting reinforcement are combined in one Specifying soft rock position for anti-reflection and grouting reinforcement can form a new roadway support method

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