A Method for Selecting Similar Materials for Rocks in Scaled Physical Modeling Tests
X. M. Shi, B. G. Liu, Y. Y. Xiang, Y. Qi
Beijing Jiaotong University, Beijing, 100044 China
Keywords: физическое моделирование, горная порода, эквивалентный материал, независимые критерии, регрессионный анализ, Physical modeling test, rock, similar material, orthogonal test, regression analysis
Abstract
The physical modeling test using similar materials to simulate the strata and structures is one of the main research approaches in geotechnical and mining engineering. One of the key techniques in a physical modeling test is to simulate the strata with appropriate similar materials. The most common similar material to simulate rocks is composed of quartz sand and barite, bonded with cement, gypsum or lime. This study classified the materials into Li-Gy material and Ce-Gy material according to different bonding materials. For each type of the similar materials, large numbers of specimens with different compositions were tested according to the following orthogonal rules to obtain the properties and analyze the changes with different compositions. Relations between the compositions and the properties of the similar materials were obtained through the multiple regression analysis. Based on the test results and the regression equations, a method for selecting appropriate similar materials to simulate rocks was proposed and a Python script for implementation was developed. A calculation example was given to illustrate the effectiveness and expediency of this method.
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