RESEARCH ON DEVELOPING EXTENSION THEORY TO EVALUATEROCK STABILITY IN DEEP-UNDERGROUND ROCK ENGINEERING

摘要

In this paper, extension theory, which is developed on the basis of matter-element theory and conjunction function, is introduced to evaluate the stability of rock in deep depth. The extension theory takes into account the influences of high in-situ stress, high ground temperature and high hydraulic pressure on the mechanical characteristics of rock in deep depth. The traditional evaluation indices are modified to reflect the facts met in the deep-underground rock engineering and an extensional model is established to evaluate the stability of rock in deep-underground rock engineering. It reduces the error caused by subjective judgment and makes the results more objective by applying simple conjunction function to calculate the weight coefficient of evaluation indexes. Moreover, the extension theory is used to evaluate the rock quality in certain deep mines, which testifies that it is reasonable and feasible to introduce extension theory into rock stability evaluation in deep-underground rock engineering.