Precise targeted bolting-grouting control method suitable for deep soft rock roadway

Abstract

The invention discloses a precise targeted bolting-grouting control method suitable for a deep soft rock roadway. Under the condition of high crustal stress, roadway surrounding rock has the characteristics of tensioning, shearing fracture, continuous deformation and the like with remarkable directivity, the spatial distribution characteristics of tensile-shear cracks of the roadway surrounding rock can be obtained and mastered through theoretical and experimental research, and by adopting an anchor net cable supporting and grouting reinforcement technology with certain objectivity and directivity, positioning control over directional fracture of roadway support can be efficiently achieved, and therefore accurate targeted control is achieved.

Description

technical field [0001] The invention relates to the technical field of mines, in particular to an accurate targeting anchor injection control method suitable for deep soft rock roadways. Background technique [0002] The phenomenon of high ground stress, high ground temperature, and high osmotic pressure in the deep rock mass poses a huge threat to the long-term stability of the surrounding rock of the deep roadway, causing severe mine disasters such as large deformation of high ground stress soft rock, rock burst, rock burst, and water inrush. , which seriously threatens the safe production of deep mines; under the condition of deep roadway formation, many large-section coal (rock) seam roadways that have been supported by anchor-mesh-cable joint support still appear large Deformation, damage and even serious instability have caused great difficulties and potential safety hazards for the normal use of the roadway. The causes of these problems are all due to the fact that t...

AI Technical Summary

Problems solved by technology

[0002] The phenomenon of high ground stress, high ground temperature, and high osmotic pressure in the deep rock mass poses a huge threat to the long-term stability of the surrounding rock of the deep roadway, causing severe mine disasters such as large deformation of high ground stress soft rock, rock burst, rock burst, and water inrush. , which seriously threatens the safe production of deep mines; under the condition of deep roadway formation, many large-section coal (rock) seam roadways that have been supported by anchor-mesh-cable joint support still appear large Deformation, damage and even serious instability have caused great difficulties and potential safety hazards for the normal use of the roadway

The causes of these problems are all due to the fact that the deep rock mass deformation, fracture mechanism, and anchor-surrounding rock coupling mechanism are not clear, and blindly adopt empirical and uniform anchoring support schemes; Support, as the most widely used support method, is mostly based on the engineering analogy method combining Platts theory, suspension theory and loose ring theory to carry out support design, but these support methods in the prior art ignore the rock mass The consideration of fracture direction, shape and fracture properties only considers the scope of macroscopic fragmentation

This support technology is difficult to meet the requirements of on-site support in many cases, and it is prone to failure catastrophes such as large deformation, rupture and instability.

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