基于煤岩流变特性的狭窄煤柱冲击地压孕育过程研究  

Research on Gestation Process of Rockburst in Narrow Coal Pillar Based on Rheological Properties of Coal and Rock

作　　者：尹万蕾[1] 潘一山[1] 李忠华[1] 宋艳芳[1] 朱丽媛[1] 

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《防灾减灾工程学报》2016年第5期834-840,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家973课题项目(2010CB226803);国家自然科学基金项目(51174107)资助

摘　　要：工程实践表明,冲击地压发生有一个孕育过程,即具有时间上的滞后性。借鉴基于流变模型的地震孕育过程研究成果,将Burgers-Senvitorve-Bengarm模型应用于狭窄煤柱流变特性研究,结合义马矿区耿村煤矿开采实际情况,重点研究狭窄煤柱冲击地压的孕育过程。结果表明:狭窄煤柱冲击地压孕育过程的前期阶段,弹性变形能的累积大于煤体损伤造成的能量耗散,以弹性变形能的累积为主;狭窄煤柱冲击地压孕育过程的后期阶段,弹性变形能的累积小于煤体损伤造成的能量耗散,以能量耗散为主。软岩孕冲过程中能量的累积和耗散能力较弱,孕冲时间较长,冲击地压发生时释放的能量较小;硬岩孕冲过程中能量的累积和耗散能力较强,孕冲时间较短,冲击地压发生时释放的能量较大。Case study shows that rockburst often needs a preparation period before it happens. Rockburst in coal mines frequently occurs with a time lag. This paper reveals its gestation process based on the rheological properties of coal and rock. Based on the seismic studies of rheo- logical model birth process and applied the Burgers-Senvitorve-Bengarm Model to rheological properties of narrow coal pillar, this research focuses on the rock-burst gestation process in nar- row coal pillars with the actual mining of Gengcun coal mining of Yima. Results show that in the early stage of narrow coal pillar rock-burst birth process, the elastic energy accumulation is domi- nant. In the later stage, the energy dissipation is dominant. Energy accumulation and dissipation abilities of soft rocks during the rockburst gestation process are weaker than that of hard rock. The whole process lasts for a long time and with less energy releasing during rockburst. While for hard rocks, it is opposite to the soft rocks.

关 键 词：冲击地压 孕育过程 煤岩流变特性 Burgers-Senvitorve-Bengarm模型 狭窄煤柱 

分 类 号：TD324[矿业工程—矿井建设]