内蒙古乌努格吐山铜钼矿露天采场边坡工程地质特征及破坏类型

ENGINEERING GEOLOGY OF THE OPEN PIT SLOPE OF THE WUNUGETUSHAN COPPER-MOLYBDENUM MINE IN INNER MONGOLIA

通过对乌努格吐山铜钼矿露天采场边坡自然背景条件、岩体结构类型、岩石力学参数、工程地质岩组特征、结构面特征、边坡工程地质分区、边坡稳定性评价、边坡破坏类型及规模等论述,阐明了露天采场边坡工程地质特征.边坡稳定性计算结果表明,A区A-A′剖面、C区E-E′剖面稳定性计算结果不能满足安全系数的要求,其他区边坡总体稳定性较好.露天采场现处于生产建设阶段,边坡正处于剥离形成过程中,边坡几何形态保存较完整,仅局部出现小型崩塌、垮塌、粒状解体、楔形破坏、地裂缝和大气降水冲刷等.尚未出现较大规模破坏,现状边坡总体稳定,基本可代表未来边坡的破坏类型和稳定状态.

The engineering geological characteristics of the open pit slope of Wunugetushan Cu-Mo mine are analyzed in respect to the natural background conditions, structural types of rock mass, rock mechanics parameters, engineering geological petrofabric features, slope engineering geological zoning, slope stability evaluation, slope failure type and size. Calculation of the slope stability shows that the A-A＇ profile in A zone and the E-E＇ profile in C zone cannot reach the requirement of safety factor. The slope stabilities in other zones are well. At present, the open pit is under construction. The slope is in the process of stripping and formation, in which the geometric shape is well kept, with only local small-scale collapse, granular disintegration, wedged failure, ground fissures and atmospheric precipitation erosion. As of now, the slope is generally stable, without significant damage, which can basically represent the future slope failure type and stability state.