The Nonworking Slope Stability Analysis And Treatment Measures In Dongming Open Pit Coal Mine

With the continuous development of economy and the coal utilization degree deepensunceasingly, how to safe and effective mining has became an important research topic. Asthe Dong Ming coal`s slope airport area increasesing and the strata structure revealed, theslope stability factor and production safety problem were increasingly prominent.In this paper, the non-working slope (East slope and West slope) of Dong Ming coalmine`s landslide is outstanding. So it is based on data collected in the slope site inspection.Though the physical and mechanical properties of rock and soil tests, obtained rockdensity, water absorption, compressive strength and elastic modulus test results, and foundthat the formation of the compressive strength, shear strength index is weak, easilyweathering, larger water absorption.The test results of the calculated fracture zones triaxialstraight cut, crushed with dry density test was1.64PD, cohesion was5.46KP, and internalfriction angle was14.6, obtain geotechnical physical mechanics indexes recommended.Basing limit equilibrium theory, definition of the safety factor, Mohr-Coulombstrength criterion, equilibrium conditions were studied. And determine the method ofcalculation of slope stability analysis.Now using GK1in West slope、GK3in south slope and27survey line afer southslope for study, GEO-SLOPE and FLAC3D were used simulation calculated thenon-working solpe landslide simulation cloud, and cloud analysis to determine the Slopeparameters of South and West. Finally, the slope deformation damage control measureswere proposed.Ultimately ensuring the basis of non-working slope on slope stability, reduced theamount of ablation, increased the amount of coal mining, improved the economic, andensured the safety of open-air production smoothly.