Stability Analysis Of The East Slope Of The First-mining Area In Xie’ertala Open Pit

The slope stability analysis is an important part of engineering design for Open Pit,in orderto improve design slope stability,and optimize slope angle, and eliminate the impact oflandslides on the surface mining and the constraints of safety,we need to check the originaldesign slope stability. With the development of open-pit mine engineering, the exploitation scalehas been expanding and in-depth, the problem of slope instability becomes increasingly serious,especially prominent in soft rock slope. Inner Mongolia in China, in the newly-developedXie’ertala Open Pit, the east slope of the first-mining area is a typical soft rock slope, itsstability becomes a main factors of impacting on safety in production and increasing economicefficiency.For the better evaluation of the east slope stability of the first-mining area in Xie’ertalaOpen Pit, the paper though field investigation and engineering geological investigation, andusing a combination of limit equilibrium method and FLAC3D numerical simulation method,mainly research mudstone distribution、the action of water and external applied load on eastslope stability, and based on computer simulation results, puts forward corresponding landslideprevention and control measures.According to the results: the mudstone occurrence conditions play a major controlled role inthe east slope stability, and design waste-disposal site is with a reasonable safe distance fromstope, and external applied load has no direct impact on the east slope stability. Based onsimulation results, the article proposes the integrated control measures of the slope stress remoteintelligent monitoring, and supplements by the foot within the row of pressure.