【作者】 刘竹华； 杜永廉； 吴玉庚； 陈诗才；

【Author】 Liu Zhuhua Du Yonglian Wu Yugeng Cheng Shicai (Institute of Geology,Academiasimica)

【机构】 中国科学院地质研究所；

【摘要】 兰家火山露天矿边坡高120 m左右,设计最大开挖深度570 m。矿山工程地质条件比较复杂,边坡岩体主要为大理岩、角闪片岩和细粒辉长岩,岩层走向与边坡平行。为评价边坡的稳定性,对片理化大理岩,软弱夹泥层等进行了力学强度试验及地质力学模拟试验,模拟试验结果表明,在边坡开挖过程,岩层脱层开裂,鼓曲变形且沿层面产生滑动;边坡岩体的水平位移一般大于垂直位移:随着边坡的开挖,边坡的岩体变形分为等速的缓慢变形,具减速特点的急剧变形及变形稳定三个阶段。显示兰家火山露天矿边坡的稳定性明显地受顺边坡方向的片理化大理岩、泥化央层及角闪片岩的控制和影响。更多还原

【Abstract】 The slope height of the Lanjia Huoshan open mine is 120 meters or so.The designed maximum depth of excavation is about 570 meters.The engineering geology condition in this open mine is more complex.The slope is composed of such strata as marble,amphibolic schist and fine grain gabber.The strike of the strata is approximately parallel to the slope.To evaluate stability of the slope,the geomechanical models test were made.During excavation of the model slope,the breaking and buckling of the strata and rock sliding along weak surfaces have been observed.And the horizontal displacement was much larger than the vertical one. The deformation of the slope rock masses include three stages of slowdeformation, rapid deformation and stable deformation.All these obtained results make it clear that the stability of the Xanjia Huoshan open mine slope evidently is affected by the marble with the schistosity,argillaceous intercalations and amphibolic schist更多还原