采矿与安全工程学报2018，Vol.35Issue(1)：71-77,7.DOI:10.13545/j.cnki.jmse.2018.01.010
充分采动覆岩"类双曲线"破坏移动机理 及模拟分析
Mechanical and numerical analysis of "analogous hyperbola" movement of overlying strata after full mining extraction
摘要
Abstract
The traditional subsidence prediction methods can not reveal the mechanism of rock strata movement and the movement laws of overlying strata are not clear. In this paper, the Hoek-Brown strength criterion and the maximum shear stress criterion was utilized to analyze the fracture mechanism of bedrock and reveal analogous hyperbola movement of overlying strata, which was expressed by piecewise functions. It was also analyzed that the variation laws between analogous hyperbola and sen-sitive parameters of overlying strata, including the thickness of top soil, the friction factor of bed rock, et al. Besides, the theoretical subsidence prediction formula was derived, which was verified by field monitoring data. The Particle Flow Code (PFC) was applied to simulate the movement of overlying strata. The analogous hyperbolic movement boundary of overlying strata was obviously founded, which is approximately consistent with the theoretical model.关键词
覆岩梯度破坏/关键层/类双曲线/分段函数/Hoek-Brown强度准则Key words
gradient damage of overlying strata/key rock stratum/analogous hyperbola model/piecewise function/Hoek-Brown strength criterion分类
矿业与冶金引用本文复制引用
左建平,孙运江,王金涛,史月,文金浩..充分采动覆岩"类双曲线"破坏移动机理 及模拟分析[J].采矿与安全工程学报,2018,35(1):71-77,7.基金项目
国家自然科学基金优秀青年基金项目(51622404) （51622404）
国家自然科学基金项目(51374215,11572343) （51374215,11572343）
"十三五"国家重点研发计划项目(2016YFC0801404) （2016YFC0801404）
国家"万人计划"青年拔尖人才联合资助项目 （）
