工程地质学报2024，Vol.32Issue(1)：86-95,10.DOI:10.13544/j.cnki.jeg.2022-0460
深部矿山不同埋藏深度岩石拉压力学特性试验研究
EXPERIMENTAL STUDY ON TENSILE AND COMPRESSIVE MECHANI-CAL PROPERTIES OF ROCKS FROM DIFFERENT DEPTHS AT A DEEP MINE
摘要
Abstract
The physical and mechanical properties of rocks undergo changes with burial depth.To explore the in-fluence of different burial depths on these properties,surrounding rock cores from both the hanging wall and foot-wall were drilled at a lead-zinc mine in Yunnan,spanning four depths(ranging from 900 to 1200 m).Uniaxial com-pression and Brazilian splitting tests were conducted under varying water content conditions(natural state and satu-rated state).The results indicate that the rock material composition and structure remain similar within the studied depth range.As the rock burial depth increases,the density,p-wave velocity,uniaxial compressive strength,ten-sile strength,and elastic modulus of rock samples show a slight increase,while Poisson's ratio initially increases and then decreases.The water content conditions of the samples significantly impact their mechanical properties.Af-ter water saturation treatment,the compressive strength,tensile strength,and elastic modulus of samples at differ-ent burial depths are notably reduced,and Poisson's ratio experiences a marked increase.The order of water sensi-tivity for each parameter is compressive strength＞elastic modulus＞Poisson's ratio＞tensile strength.This study pro-vides a clear explanation for the variation in tensile and compressive mechanical properties of surrounding rock at different burial depths in deep mines.关键词
深部开采/深部岩石力学/工程地质/含水率Key words
Deep mining/Deep rock mechanics/Engineering geology/Water content分类
天文与地球科学引用本文复制引用
李地元,罗平框,朱志根,方旭刚,周奥辉,何啸,马金银..深部矿山不同埋藏深度岩石拉压力学特性试验研究[J].工程地质学报,2024,32(1):86-95,10.基金项目
国家自然科学基金项目(资助号:52074349).This research is supported by the National Natural Science Foundation of China(Grant No.52074349). （资助号:52074349）
