Method for indirectly obtaining stress and deformation state of underground roadway surrounding rock

Abstract

The invention discloses a method for indirectly obtaining stress and deformation state of underground roadway surrounding rock. The method is characterized by comprising the following steps: testing horizontal stress of roadway surrounding rock on the site, calculating and analyzing the internal force and deformation thereof on the roadway surrounding rock by combining numerical simulation calculation software, providing necessary parameters for the design of a supporting structure, and obtaining a damage mode and deformation characteristics of the roadway surrounding rock. The method has the advantages that instruments and equipment for testing the stress of the roadway surrounding rock are relatively simple, the horizontal stress of the roadway surrounding rock can be accurately measured through the measurement method, the true stress and deformation state of the roadway surrounding rock can be obtained by combining the numerical simulation calculation software, and the method is particularly suitable for design and calculation of the supporting structure in the process of allowing the roadway to pass through a high ground stress area and a fault fracture zone.

Description

Technical field [0001] The present invention involves the field of alleyway surrounding rock stress testing and numerical analysis. Specifically, it is a method that indirectly obtains underground lanes surrounding rocks and deformation state. Background technique [0002] When the underground lanes are excavated through the stress area, rock crushing bands, or the crushing belt of the fault, the lane surrounding rock support structure must be carried out to ensure the overall stability of the alleyway surrounding rocks.There are two ways to obtain structural design parameters: [0003] First, according to the thickness of the thickness of the rock layer on the top of the lane road and the basic physical mechanical properties of the rock soil, the calculation of the horizontal stress of the surrounding rock body is roughly performed, and then the calculation of the stress and deformation of the alleyway surrounding rocks according to the relevant software.The design parameters of...

AI Technical Summary

Problems solved by technology

[0004] Another method is to measure the deformation convergence of the surrounding rock of the roadway after the roadway is excavated, and measure the absolute displacement value of the deformation control points of the top and side walls of the roadway. The stress value of the surrounding rock, but this method requires continuous monitoring until the deformation is stable, which takes a long time, and the monitoring work is cumbersome and difficult. The most important thing is that the roadway rock mass cannot be supported in time , it may cause the rock mass of the roadway to collapse, collapse or roof fall, thereby affecting the construction progress of the project and causing safety hazards to construction personnel and mechanical equipment

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