煤矿安全2012，Vol.43Issue(11)：48-50,3.
煤岩重复加载力学特性试验研究
Experimental Study on Mechanical Properties of Coal Under Repeated Loading
摘要
Abstract
The mechanical properties of coal samples from Yunhe coal mine under repeated loading are studied through experiments of MTS 815.03 servo-controlled rock mechanical test system.The results indicate that compared with the ultimate strength under uniaxial compression test,the ultimate strength of coal samples under repeated loading decreases by 23.65%;compared with the first loading,the elastic modulus under the second loading increases by 21.08%.Because the coal samples have many initial fissures and lower intensity,the close and splay of the initial and newborn damage fissures and the non-recover macroscopic cracks offer a reasonable explanation for the increase of elastic modulus and the decrease of the ultimate strength.Under repeated loading,more than a third of the energy is consumed by the way of the close of interior fissures,the yielding,failure,breakage of the material and the sliding friction of fractures.The failure processes of coal go through pressure consolidation,strain hardening and strain softening.关键词
煤岩/重复加载/力学特性/能量特征/试验Key words
coal/repeated loading/mechanical properties/energy feature/experiment分类
矿业与冶金引用本文复制引用
王海龙,陈绍杰,赵铁鹏,钟宜涛..煤岩重复加载力学特性试验研究[J].煤矿安全,2012,43(11):48-50,3.基金项目
高等学校博士学科点专项科研基金资助项目 （）
国家自然科学基金资助顶目 （）
山东优秀中青年科学家科研奖励基金资助项目 （）
山东省高等学校科技计划资助项目 （）
研究生科技创新基金资助项目 （）
