Study On Stability Of South Slope Of Zhujiabaobao Iron Mine

Panzhihua iron ore deposit in the process of forming a complex geological changes,fault development,rock fracture,different periods of interdiffusion,the geological structure is complex.Although many geological surveys and different depths of slope research have been carried out,many of the faults and rock interfaces in the mining area have not yet formed a unified understanding.Therefore,the focus of this study is to clarify these The inherent factors that control the damaging effect of the slope.In this paper,the distribution,scale,main predisposing factors,stability and development trend and hazard characteristics of the south slope of the Zhujia Baoyu Iron Mine in Panzhihua Iron and Steel Company were identified through field investigation and field investigation.It is the most important factor to influence the stability of the slope and the slope to the fault in the south bank of the Zhujia Baotou Iron Mine in Panzhihua,although it is easy to form a skewed wedge.The flow surface under the action of external force,it is easier to form a relatively complete sliding surface,the sliding surface of the stability of the slope as a whole will have a great impact;different lithological contact surface,because of its weak contact,so Easy to form a sliding surface.Open mining will use blasting operations,which will cause the overall strength of the slope rock mass to reduce,resulting in more loose structural surface,thereby increasing the possibility of landslides occurred.Therefore,in the production of blasting should take control blasting technology,can control the resistance line,the type of explosives,the hole is too high,packing,charge density,hole distance,and blasting hole diameter,height to achieve,in order to produce blasting is right The adverse effects of the slope are minimized.The surface water formed by the rainfall is also in the process of scouring the surface rock mass and infiltrating the discontinuous weak structure of the rock mass.This infiltration of the groundwater will result in a significant reduction in the effective shear strength of the rock mass along the weak zone Unstable rock mass causes slip to cause disaster.At the same time,because the ore body is dominated by gabbro mainly,the permeability coefficient of gabbro is very low,and the drainage works of slope are relatively difficult,which further aggravate the unstable factors of mine slope and calculate by numerical simulation.The stability of the slope of the area is quite large in relation to groundwater.