刚果(金)SCM铜钴矿滑石成因及对边坡稳定的影响

Genesis of Talc from SCM Copper Cobalt Mine in Democratic Republic of Congo and Its Impact on Slope Stability

对刚果(金)SCM铜钴矿区的地质构造背景、岩性条件进行分析,证明了SCM矿区具有形成滑石的物质基础和构造条件。通过研究矿区坡面出露滑石处的构造条件,验证了滑石形成与构造条件的密切关系。与国内辽东地区滑石矿床的成矿机制进行类比分析,推断SCM矿区的滑石与辽东地区滑石矿床相类似,均为区域变质条件下的热流体交代型。从滑石出露处的不整合接触构造条件,滑石本身较低的抗压、抗剪强度性质,以及水的作用下滑石强度进一步弱化并可能发生渗流破坏等方面分析了滑石对边坡稳定的不利影响,对采矿安全和边坡监测工作具有示警意义。

The geological structure background and lithological conditions of the SCM copper cobalt mining area in Democratic Republic of Congo is analyzed and it proves that the SCM mining area has the material basis and structural conditions for the formation of talc;By studying the structural conditions of the exposed talc on the slope of the mining area,the close relationship between the formation of talc and the structural conditions is verified;By analogy with the mineralization mechanism of talc deposit in eastern area of Liaoning Province,it can be inferred that the talc in SCM mining area is similar to that in eastern area of Liaoning Province,and both are of hydrothermal metasomatic type under regional metamorphic conditions.This paper analyzes the adverse effects of talc on slope stability from the aspects of the unconformity contact structural conditions at the exposed talc,the low compressive and shear strength properties of talc itself,and the further weakening of talc strength under the action of water and the possible seepage failure,which is of a strong warning significance for mining safety and slope monitoring.