王重洋, 韦四江, 翟黎伟, 等.基于石膏质类岩石的煤岩组合试样物理力学性质试验研究[J].河南理工大学学报（自然科学版）,2022,41(6):36-44.

WANG C Y, WEI S J, ZHAI L W, et al.Experimental study on physical and mechanical properties of coal rock composite samples based on gypsum rock[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(6):36-44.

基于石膏质类岩石的煤岩组合试样物理力学性质试验研究

王重洋, 韦四江, 翟黎伟, 张省

河南理工大学 能源科学与工程学院，河南 焦作 454000

摘要:为了研究岩石高度占比指标n对煤岩组合试样物理力学性质的影响，对石膏质类岩石组合试样的单轴压缩强度、三轴压缩强度及压缩过程中的声发射现象进行研究。结果表明：组合试样的力学性质与n密切相关，单轴抗压强度和不同围压下的三轴抗压强度均随n增加而增大；n越大，组合试样的冲击能指数越大，岩爆倾向性越明显，随着试样内部孔隙和“节理”减少，试样在三轴压缩时的声发射特征趋于“不活跃”状态；组合试样的破坏与其强度、高度占比指标有关，强度越低、n越大，组合试样越容易发生破坏。研究结果对理解煤岩组合矿柱的失稳机理和稳定控制具有参考作用。

关键词:石膏;煤岩组合试样;力学特性;单轴压缩;三轴压缩;声发射

doi:10.16186/j.cnki.1673-9787.2021020019

基金项目:国家自然科学基金资助项目（51974104）

收稿日期:2021/02/06

修回日期:2021/05/24

出版日期:2022/11/25

Experimental study on physical and mechanical properties of coal rock composite samples based on gypsum rock

WANG Chongyang, WEI Sijiang, ZHAI Liwei, ZHANG Sheng

School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:To study the influence of rock height ratio index n on the physical and mechanical properties of coalrock composite samples，gypsum rock-like composite samples were used to study their uniaxial compression strength，triaxial compression strength and acoustic emission phenomenon in the process of experiment.The conclusions were as follows：The mechanical properties of the composite samples were closely related to the rock formation proportion coefficient n，and the uniaxial compressive strength and the triaxial compressive strength under different confining pressures increased with the increase of n.The larger n was，the larger the impact energy index of the combined sample is，and the more obvious the rockburst tendency was.With the decrease of the pores and“joints”in the sample，the acoustic emission characteristics of the samples tended to be“inactive”during triaxial compression.The failure of the compoite sample was related to the strength and proportion of each component sample.The lower the strength was and the larger the proportion of the component sample was，the more likely the failure was to occur.The research results could be used as a reference for understanding the instability mechanism and stability control of coal-rock combined pillar.

Key words:gypsum;coal rock compoite sample;mechanical propery;uniaxial compression;triaxial compression;acoustic emission

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