WANG S L, LIU Z H, ZHANG K Z,et al.Experimental study on strength weakening effect of gypsum mine rock under circulating temperature[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(3):153-157.

doi:10.16186/j.cnki.1673-9787.2021050105

Received:2021/05/25

Revised:2021/08/20

Published:2023/05/25

Experimental study on strength weakening effect of gypsum mine rock under circulating temperature

WANG Shuli1, LIU Zhihe1, ZHANG Kaizhi2, ZHENG Huaichang1

1.School of Resources and Environmental Engineering，Shandong University of Technology，Zibo  255000，Shandong，China;2.Institute of Minging Engineering，Guizhou Institute of Technology，Guiyang  550003，Guizhou，China

Abstract:In order to study the influence of circulating temperature on gypsum rock，experiments were carried out to reveal gypsum rock strength weakening with wave velocity representing integrity and uniaxial compressive strength representing strength weakening.The results showed that：With the number of circulating temperature increasing，the wave velocity showed out the law of “gentle-sharp-fluctuate-stable”，and the integrity decrease rate of gypsum rock was 27.3%，which verified that circulating temperature induced micro-structure change and damage to gypsum rock.With the number of circulating temperature increasing，the stress-strain curve of gypsum rock showed out compaction stage growing， elastic stage shortening，plastic stage increasing and strain of peak strength increasing，the peak strength was decreasing，and the biggest decreasing rate was 12.60%，which verified that the circulating temperature induced strength weakening effect of gypsum rock.The research results had theoretical guidance and reference significance to reveal the collapse mechanism of large gypsum goaf and its control.

Key words:gypsum mine rock;circulating temperature;wave velocity;uniaxial compressive strength;strength weakening

循环温度作用下石膏矿岩强度劣化效应试验研究_王树立.pdf