文献类型：期刊文献

中文题名：煤岩本构关系与冲击倾向指标的力学分析

英文题名：Coal Constitutive Relation and Mechanical Analysis of Its Impact Tendency Index

作者：丁鑫[1];肖晓春[2];潘一山[1,3];吕祥锋[4];吴迪[1]

机构：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000;[2]绍兴文理学院土木工程学院岩石力学与地质灾害实验中心,浙江绍兴312000;[3]辽宁大学环境学院,辽宁沈阳110136;[4]北京科技大学土木与资源工程学院,北京100083

年份：2020

卷号：16

期号：5

起止页码：1371

中文期刊名：地下空间与工程学报

外文期刊名：Chinese Journal of Underground Space and Engineering

收录：CSTPCD、、北大核心2017、CSCD2019_2020、北大核心、CSCD

基金：国家科技重点研发计划(2017YFC0804208);辽宁省教育厅一般项目(LJYL045);国家自然科学基金(51774164,51774048,51504122)。

语种：中文

中文关键词：冲击地压;冲击倾向性;煤岩本构关系;力学分析

外文关键词：rock burst;impact tendency;coal constitutive relations;mechanical analysis

中文摘要：深入研究不同冲击倾向煤岩力学行为演化机制对认识和防治冲击地压具有重要的科学意义与工程价值。以弹塑性力学、岩石力学相关理论为基础,综合分析现有研究成果认为煤岩对外载荷的弹、塑性力学响应是其具有冲击倾向特征的本质原因,将煤岩峰值前塑性应变与弹性应变的比值定义为峰前损伤系数(K),以Scott模型为基础建立了煤岩本构关系,揭示了煤岩具有不同冲击倾向性的深层原因是损伤形成在受载过程的分布差异。推导了弹性能指数、冲击能量指数、峰后切线应力降模量和平均应力降模量的理论表达,随K值越小煤岩峰后盈余能越大,其冲击倾向特征越明显;将实测结果与理论值对比,弹性能指数理论值与实测结果吻合程度较高,而冲击能指数相对较低,但理论值对煤岩冲倾向性分类结果与实测值基本一致,总体上能对煤岩冲击倾向特征较好的描述。

外文摘要：It has important scientific significance and engineering value to understand rock burst,which is to study the mechanical behavior evolution mechanism of coal with different impact tendency deeply. Based on related theories of elastoplastic mechanics,rock mechanics,and analysis of existing research,it considered that the elastic and plastic mechanical response of coal to external loading is the essential reason of its impact tendency,defined the ratio of plastic strain to elastic strain before peak value as pre-peak damage coefficient(K). The constitutive relation of coal was established based on Scott model,and revealed that the deep cause of the different impact tendency of coal was the damage distribution. The theoretical expressions of elastic energy index,impact energy index,tangent and average stress drop modulus were derived. With the smaller value of K,the larger the surplus energy is and the more obvious the impact tendency is. Compared the theoretical values with the measured results,that of the elastic energy index agrees with the experiment results to a higher degree,while the impact energy index is relatively low. The classification of the obliquity of coal are basically consistent with the measured values,and it can describe the characteristics of coal burst propensity better in general.