采矿与安全工程学报2012，Vol.29Issue(4)：543-548,6.
空区项板安全厚度和临界跨度确定的数值模拟
Numerical Simulation for Determining the Safe Roof Thickness and Critical Goaf Span
摘要
Abstract
In order to determine the relationship between goaf roof thickness and critical span, an iron ore goaf is taken as an engineering instance. The rock mass mechanical parameters are obtained from the mechanical experiments of rock specimens sampled in situ. The relationship between the safe roof thickness and the critical goaf span is determinined according to K. B. Lu Peinie equation, ratio of thickness and span equation, structure mechanics of girder and plate beam equation. Meanwhile, the damage and failure process of goaf roof is simulated by RFPA numerical simulation program. The rela-tionship between the safe roof thickness and the critical goaf span is determined, respectively, when the initial damage and instability of goaf roof are adopted as the criteria. The values predicted with K. B. Lu Peinie equation are most close to the numerical ones when the damage of roof begians. The ratio be-tween them can be considered as a safety factor obtained from the numerical simulations. As it shows, it is kept a large safety factor by the critical roof thickness which is calculated by K. B. Lu Peinie equation. The numerical simulation with RFPA could obtain this safety factor, and it may have more extensive applicability.关键词
采空区/顶板/安全厚度/临界跨度/RFPA数值模拟Key words
goaf/ roof/ safe roof thickness/ critical goaf span/ RFPA numerical simulation分类
建筑与水利引用本文复制引用
张敏思,朱万成,侯召松,郭孝庆..空区项板安全厚度和临界跨度确定的数值模拟[J].采矿与安全工程学报,2012,29(4):543-548,6.基金项目
国家自然科学基金项目(50934006,51111130206) （50934006,51111130206）
中央高校基本科研业务费项目(N110201001,N100701001,N0901001):科技部中国-南非联合研究计划项目(CS06-L01) （N110201001,N100701001,N0901001）
霍英东教育基金资助课题项目(122023) （122023）
辽宁省教育厅科学技术研究项目(LT2010033) （LT2010033）
