Soft rock creep in-situ monitoring analysis method and system

Abstract

The invention discloses a soft rock creep in-situ monitoring analysis method and a system. The method comprises the following steps: acquiring instantaneous data and creep data of deformation, strain and stress of each measuring point on stratums at different depths under different pore pressure and temperature working conditions; according to instantaneous pressure data obtained through field monitoring, obtaining instantaneous deformation, strain and stress of any point on the stratum of each depth through calculation; according to creep data of deformation or strain of each measuring point obtained by field monitoring, fitting to obtain creep characteristic parameters of the corresponding measuring point in a rock in-situ state; and according to the data obtained through field monitoring and the data obtained through calculation, obtaining the stratum creep parameters of the measurement section, the change rule along with the depth and the overall deformation amount of the surrounding rock of the soft rock roadway along with time. Therefore, by adopting the scheme provided by the invention, the overall deformation characteristics and rules in the supporting process of a soft rock roadway heading machine can be effectively researched in time, the targeted design of roadway supporting parameters is realized, and the optimal supporting opportunity is effectively grasped.

Description

technical field [0001] The invention relates to the field of tunnel engineering technology and mine safety mining technology, in particular to an in-situ monitoring and analysis method and system for soft rock creep. Background technique [0002] At present, most of the creep parameter tests for formations are carried out by indoor experiments. Most of the samples used in the experiment are processed cores retrieved from the site. Since the core is not subjected to pressure preservation and heat preservation measures during collection and transportation, pressure relief and cooling will occur. The pressure relief and cooling of the core has little effect on the test results of the shallow formation, but for the deep formation, because the properties of the core during the experiment and the actual formation are quite different, it has a greater impact on the test results. [0003] In order to reduce the difference in test results caused by the difference between the retrie...

AI Technical Summary

Problems solved by technology

However, this method has the following problems: on the one hand, the excavation space is large, the time is long, the unloading effect is obvious, and the actual ground stress cannot be provided; Soft rock has a large amount of deformation and a long period of time effect, so this type of method cannot achieve real-time monitoring of the whole process, and the deformation laws of different positions of the roadway are different, so it is difficult to grasp the creep deformation law of the full-section soft rock roadway, and it is impossible to analyze Reasonable guidance on site support methods and support parameters will affect the long-term stable use of tunnels (roadways)

Images