摘要
为研究条带开采工程在外部扰动力作用下条带煤柱的稳定性,结合峰峰矿区条带开采经验和万年矿建筑物下压煤实际情况,综合分析后,确定庄宴村下压煤的条带开采方案,并在此基础上建立FLAC3D数值模型,采用动力时程分析方法分析了地震波对条带开采岩体稳定性影响,根据带抗拉摩尔库伦本构关系,利用强度屈服准则来判断条带煤柱单元稳定性,得出条带煤柱各单元安全系数,结果表明,条带煤柱在地震作用下稳定性降低,因此开采设计过程中必须考虑动载荷的影响。
In order to study strip coal pillar stability under the external disturbance in strip mining project, combined with the strip min- ing experience of Fengfeng Mining Area and Wannian Coal Mine under buildings actual condition, Zhuangyan village under the pressure of coal strip mining scheme is identified after a comprehensive analysis, and on basis of above, the FLAC3D numerical model is estab- lished, the seismic waves on the strip mining of rock stability influence is analyzed by using the dynamic time - history analysis meth- od. According to Mohr - Coulomb with tensile constitutive relation, the stability of strip coal pillar unit is judged by using yield strength criterion. The unit safety coefficient of the strip coal pillar is gotten. The strip coal pillar stability is reduced after earthquake, so the exploitation of design must be considered in the process of dynamic load effect.
出处
《煤矿安全》
CAS
北大核心
2014年第3期189-192,196,共5页
Safety in Coal Mines
基金
煤炭联合基金资助项目(U1261206)
关键词
地震
扰动
条带煤柱
动力
稳定性
条带开采
强度屈服准则
seismic
disturbance
strip coal pillar
dynamic
stability
strip mining
yield strength criterion