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

A technology for underground engineering and fractures, which is applied in the directions of measuring devices, permeability/surface area analysis, suspension and porous material analysis, etc. It can solve the problems of waste of resources, lack of data and data reference, etc., and achieve comprehensive and reliable data.

Active Publication Date: 2016-06-08
SHANDONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The method for measuring the seepage law of bolting and grouting in the surrounding rock of the crack in the underground engineering comprises the following steps:

[0032] Step 1: Collect large-scale rocks and rocks at the underground engineering site, use this as the research object to simulate the rock mass environment in the underground engineering, measure the degree of cracks in the large rocks, and obtain the crack density;

[0033] Step 2: Design an orthogonal test scheme for anchoring and grouting seepage in the surrounding rock for filling through fractures;

[0034] Orthogonal test scheme for anchoring and grouting seepage in surrounding rock filled through cracks, the process is as follows: borehole length l, borehole diameter d, inclination angle α, filler gradation ε, cement strength grade ω, water-cement ratio as n, grouting press...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 王琦李术才王春和栾英成孙会彬高松江贝牛晋平潘锐王雷李延配霍文涛张传奎石常生王富奇任尧喜张若祥王德超曾艳君郭念波王保齐秦乾于恒昌邵行胥洪彬高红科
Owner SHANDONG UNIV
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