Rock elastic deformation energy index determination method, system, terminal and readable storage medium

Abstract

The invention discloses a rock elastic deformation energy index determination method, a system, a terminal and a readable storage medium. The method comprises the following steps: determining the density, longitudinal wave velocity and uniaxial compressive strength of a rock sample; inputting the density, the longitudinal wave speed and the uniaxial compressive strength of the rock sample as input data into the machine learning model to obtain a uniaxial compressive strength prediction model; measuring the uniaxial compressive strength of the rock to be measured by using the uniaxial compressive strength prediction model; and performing a uniaxial loading and unloading test based on the uniaxial compressive strength of the to-be-tested rock to obtain the elastic deformation energy index of the to-be-tested rock. According to the method, the density and the longitudinal wave speed are used as input characteristics for model training to obtain the uniaxial compressive strength prediction model, so that the uniaxial compressive strength of the rock can be accurately predicted, and the unloading point position of the subsequent to-be-measured rock can be accurately predicted based on the accurate uniaxial compressive strength; the problem that an unloading point cannot be accurately judged in an existing rock elastic deformation energy index test is solved.

Description

technical field [0001] The invention belongs to the field of mining engineering and geotechnical engineering, and in particular relates to a method, system, terminal and readable storage medium for measuring elastic deformation index of rock. Background technique [0002] Scholars and engineering circles at home and abroad often use the concept of impact tendency to describe the rockburst tendency of ore and rock materials, and adopt the rock elastic deformation energy index W proposed by Polish scholar A.Q.Kidybinshi et To measure. Such as figure 1 As shown, the rock elastic deformation energy index W et The determination method is to carry out uniaxial compression test on the rock specimen, load the specimen until the stress reaches 80%-90% of the uniaxial compressive strength, and then unload it to zero to obtain the stress-strain curve, and then pass the stress-strain curve difference The area of ​​the part is calculated to obtain the elastic deformation energy E e a...

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Problems solved by technology

[0014] The purpose of the present invention is to provide a method, system, terminal and readable storage medium for measuring the elastic deformation energy index of rock in view of the problem that the rock elastic deformation energy index cannot be accurately measured in the prior art

The method uses the advantages of machine learning to train the model using density and longitudinal wave velocity as input features to obtain a uniaxial compressive strength prediction model, so that the uniaxial compressive strength of the rock can be accurately predicted, and then based on the accurate uniaxial compressive strength , can accurately predict the position of the unloading point of the subsequent rock to be tested, solve the problem that the existing technology cannot accurately determine the unloading point in the rock elastic deformation energy index test, and finally can test a more accurate rock elastic deformation energy index

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