摘要
以四川省芙蓉矿业集团公司某矿事故案例为研究对象,提出矿山非典型动力现象的定义,利用弹塑性问题的三维有限元数值分析软件,分析采场应力分布规律、计算各坚硬厚层顶板的初次和周期断裂步距、分析破坏岩块的平衡结构,揭示矿井非典型动力现象发生的机理:位于弯曲下沉带最下位的厚层坚硬顶板在地质构造和采动影响下初次断裂失稳,破坏了下位"砌体梁"平衡结构,直接导致了矿井非典型动力现象的产生。研究表明:顶板岩层结构、原岩应力、"主关键层"的冲击倾向性是影响矿井非典型动力现象发生的3大主要因素。
An atypical dynamic phenomenon of mines, including its action forms and definition, were put forward, based on the mining accident at the Furong Mining Group Company in Sichuan, P. R. China. The mechanism of the atypical dynamic phenomenon was revealed by analyzing rock stress distribution, calculating the first and cycle broken distance of each thick and hard roof, and analyzing the balance structure of broken rock based on the three-dimensional finite element software. The first stratum of the bent, sunken, aged strip was influenced by the geological conformation and the coal mining activity. This created the first break of the key stratum and led to the atypical dynamic phenomenon. We show that the key factors affecting the phenomena are the roof and floor structures, surrounding rock, and initial stress and rock burst tendency of the key stratum.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第12期1446-1450,1454,共6页
Journal of Chongqing University
基金
国家自然科学基金资助项目(50374084)
关键词
矿山
非典型动力现象
机理
数值模拟
mines
atypical dynamic phenomenon
numerical simulation
mechanism
