Determination method of permeability rule of crack surrounding rock bolting and grouting in underground engineering

Abstract

The present invention discloses a determination method of permeability rule of fracture surrounding rock bolting and grouting in underground engineering. The method is based on a large number of experiments and comprehensive and reliable data. A rock crack density as a variable, and significant factors affecting the permeability rule of filling cut-through crack surrounding rock bolting and grouting as a set of variables, the degree of rock crack is controlled unchanged, and a multi-factor and multi-level comprehensive experiments are conducted on the significant factors; and based on the minimum permeability coefficient principle, the optimal levels of the significant factors corresponding to different crack densities of the rock are determined. After comprehensive tests, the method obtains a relationship of multiple factors to surrounding rock crack density through regression analysis; the principle of optimal experimental results, experience form of the surrounding rock crack density corresponding to each significant factor is organized, so as to guide seepage governance in underground engineering and supporting design and implementation of in seepage environment.

Description

technical field [0001] The invention belongs to the technical field of safety in underground engineering, and in particular relates to a method for measuring the law of anchoring and grouting seepage in cracked surrounding rocks in underground engineering. Background technique [0002] The degree of fracture development in rock mass in underground engineering is not the same. Underground excavation will increase the degree of rock mass fissures, and underground engineering will pass through natural rock mass fissure zones, which will pose a great threat to the safety of underground engineering. Excessive cracks in the rock mass may lead to rock shedding, resulting in insufficient strength of the surrounding rock itself, thus affecting the stability of the underground project. Through the grouting reinforcement of the surrounding rock of the underground engineering fissure, the strength of the surrounding rock can be changed, so as to give full play to the self-bearing capaci...

AI Technical Summary

Problems solved by technology

Every time a different geological environment is encountered, it is necessary to conduct experiments to explore its permeability. The lack of data and data references leads to a large waste of resources in the experimental process.

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