矿业科学学报2024，Vol.9Issue(2)：209-216,8.DOI:10.19606/j.cnki.jmst.2024.02.008
微波热力冲击下硬脆砂岩冲击倾向性演化规律试验研究
Experimental study on the evolution patterns of bursting liability of hard and brittle sandstone under microwave thermal shock
摘要
Abstract
Rock burst is a major disaster in deep mining,where bursting liability is an important indica-tor of rock burst risk.This study therefore intends to explore the impact of microwave thermal shock on rocks with strong bursting liability by testing the microwave thermal shock and uniaxial compression of typical hard brittle sandstone and analyzing their physical and mechanical properties and the response of bursting liability indicators after microwave thermal shock.The research results show that:(1)After microwaving,the surface temperature of the sandstone continues to rise with the increase of thermal shock time,until it breaks at 150 s;(2)Microwave thermal shock has a significant effect on the struc-tural damage of sandstone.After 120 s of microwaving,the longitudinal wave velocity and elastic modu-lus decrease by 15.12%and 8%respectively.The AE signal density increases at each stage of uniaxial compression,and the maximum absolute energy at the final destruction of sandstone decreases by 42.3%;The dynamic failure time of rock increases by 259%,the impact energy index decreases by 95%,and the elastic energy index decreases by 92%.This research offer references for efficient rock breaking in deep earth engineering and prevention and control of rock burst in resource mining.关键词
冲击地压/微波/热力冲击/冲击倾向性/试验研究Key words
rock burst/microwave/thermal shock/bursting liability/experimental study分类
矿业与冶金引用本文复制引用
滕腾,贾文建,易鹏,赵毅鑫,朱笑颜,徐铎..微波热力冲击下硬脆砂岩冲击倾向性演化规律试验研究[J].矿业科学学报,2024,9(2):209-216,8.基金项目
国家重点研发计划(2022YFC3004602) （2022YFC3004602）
国家自然科学基金(52004285) （52004285）
河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地开放基金(WS2021A03) （WS2021A03）
中央高校基本科研业务费专项资金(2022JCCXNY06,2023YQTD02). （2022JCCXNY06,2023YQTD02）
