伊敏河露天煤矿一露天区边坡稳定性分析及优化设计

基于伊敏河煤矿一露天区二期扩帮工程设计的需要,在对地质资料和岩石物理力学试验成果统计分析的基础上,首先研究了边坡可能的破坏模式和计算参数的选取;然后,计算了临界坡角以确定边坡的可行性坡角和相应的可靠度;进而采用极限平衡法和平面有限元法,进行了边坡的稳定性分析。分析中考虑了地下水和地震荷载对边坡稳定性的影响。在边坡稳定性综合评价的基础上,给出了该工程的建议坡角及工程措施和建议。该建议坡角已被工程设计单位所采用。

STABILITY ANALYSIS AND DESIGN OPTIMIZATION FOR THE FIRST WORKING AREA IN THE YIMINHE OPEN PIT MINE

For meeting the needs of the 2nd stage of design for the Yiminhe Open Pit Coal Mine, the modes of slope failure are studied and the computational parameters are chosen on the basis of geological survey and geomechanical tests; then several feasible slope angles corresponding to various sliding probabilities are determined from the calculation of critical slope angles; furthermore, the slope stability with the effects of ground water and earthquake loading taken into account is analysed by the limit equilibrium theory and FEM; and finally a set of suggested slope analges and engineering measurcs are put forward for design use.