Method for testing grouting seepage and solidifying characteristics of rock body under yielding bolting-grouting coupling support

Abstract

The invention relates to a method for testing grouting seepage and solidifying characteristics of a rock body under yielding bolting-grouting coupling support. Based on a yielding bolting-grouting support theory, the method comprises the following steps of on the basis of analyzing the deformation generation of surrounding rock of a deep soft rock tunnel and adjusting the stress, designing a grouting seepage testing path of the rock body under the yielding bolting-grouting support, simulating the mechanics response of the surrounding rock under the yielding support by applying the special stress path to the specimen of the rock body in a laboratory, simulating the grouting process of the bolting-grouting support in the testing process, and performing the grouting seepage testing of the rock body under the yielding bolting-grouting support; maintaining a specimen after yielding bolting-grouting at normal temperature, testing the single-axis strength and three-axis strength of the specimen, and studying the solidifying characteristic of the rock body under the yielding bolting-grouting coupling support. The method has the advantage that the difficult problem of designing of the testing plan of the grouting slurry seepage of the rock body under the yielding bolting-grouting coupling support is solved, and the significant basic meaning is realized.

Description

technical field [0001] The invention relates to a rock mass grouting seepage and reinforcement characteristic test method, in particular to a rock mass grouting seepage seepage and reinforcement characteristic test method under pressure anchor grouting coupled support, belonging to the field of rock mechanics. Background technique [0002] Practice has shown that the innovative support concept of pressure-anchor-grouting coupled support can effectively control the large deformation of the surrounding rock in deep soft rock roadways and improve the long-term stability of the roadway. The pressure-anchor-grouting coupled support releases the uncontrollable deformation of the surrounding rock in the deep soft rock roadway through the pressure deformation of the support structure, reduces the damage of the surrounding rock stress to the support structure, and then uses the surrounding rock cracks generated by the pressure to perform grouting Reinforcement, forming a complex grou...

AI Technical Summary

Problems solved by technology

However, at present, the development of yield-anchor-grouting coupled support theory for deep large-deformation soft rock roadways in China lags far behind the practice of yield-anchor-grouting support

The main reason is that there are relatively large limitations in domestic experimental research on rock mass grouting seepage and reinforcement characteristics under the condition of pressure-anchor-grouting coupled support, mainly due to the lack of scientific test methods

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