矿区地下开采对地表及铁路线影响的数值分析  

Numerical Analysis of the Impact of Underground Mining on Surface and Railway Line

作　　者：赵军[1,2] 查剑锋[1,2] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]国土环境与灾害监测国家测绘地理信息局重点实验室,江苏徐州221116

出　　处：《煤矿安全》2015年第6期220-223,共4页Safety in Coal Mines

基　　金："十二五"国家科技支撑计划资助项目(2012BAB13B03);国家自然科学基金青年基金资助项目(41104011);江苏省高校优势学科建设工程资助项目(PAPDSA1102)

摘　　要：为了合理分析采动对地表及铁路线的影响,依据某矿工作面地质采矿特征,利用FLAC3D软件建立数值计算模型,以各岩层参数的算术均值作为基准,运用正交与均匀设计相结合的位移反分析方法求取了模型的岩体力学参数。同时,将所获取的模型参数应用于临近工作面的开采对其上方地表铁路线的影响预测。结果表明:反演所得参数可使地表下沉较好的符合实测情况;通过对比分析铁路线下沉范围预测与实测结果可知,对铁路线下沉影响长度的动态预测结果能够满足基本精度需求,由此证实了本研究所建模型及所选参数的可靠性。In order to properly analyze the impact of mining on surface and railway lines,according to geological and mining characteristics of a mine working face,the FLAC3 Dsoftware is utilized to establish the numerical model,the rock mechanics parameters of the model are obtained based on displacement back analysis method combined with orthogonal and uniform design. Simultaneously,the obtained model parameters are applied to predict the influence of mining above the nearby working face on railway line. The results show that the resulting surface subsidence inversion parameter can better meet the actual situation; through the comparative analysis of subsidence range between predicted and measured results of the railway line,the dynamic prediction result of sinking length of the railway line meets the basic accuracy needs,which confirms the reliability of the model and the selected parameter in this study.

关 键 词：数值模拟 位移反分析 力学参数 铁路线 地表沉陷 

分 类 号：TD325.2[矿业工程—矿井建设]