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Stability Analysis of Masangwan Landslide Influenced by Underground Mining

Author: YinZhiMing
Tutor: TangJianXin
School: Chongqing University
Course: Mining engineering
Keywords: Underground mining Bedding landslide Numerical Simulation Similar simulation Rainfall Stability
CLC: TD325
Type: Master's thesis
Year: 2010
Downloads: 76
Quote: 0
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Abstract


The mountain landslide topographic and geologic conditions, mining induced landslide mining is the main form of the mountainous surface mining damage. Underground mining induced landslides is a complex mechanical process, involving multiple influencing factors, has a multi-interdisciplinary and complex nature. Prevention mining landslide research involves the main factors affecting the stability of the slope mining, surface movement and deformation, the movement of the overlying strata changes and stress-strain relationship, the formation mechanism of the landslide, slope stability prediction, the slope of the long-term mining stability and other issues. Sichuan Diamond, coal mines Coriaria Bay bedding landslide survey the topography of the Diamond mines regional geological setting, geological structure, mine production and technological conditions, masang Bay landslide basic situation; analysis of the impact of mining landslide factors, and through theoretical analysis of the impact of the inverse slope mining on the slope stability, while indoor Similar Simulation Study on inverse slope mining process of overburden rock slope deformation and failure of law; use FLAC-2D the software Coriaria Bay Mining landslide numerical simulation, the variation of the stress displacement mining; final masang Bay Mining landslide stability calculation and evaluation, which impact masang Bay landslide mechanism. This paper made the following research: (1) analysis of theoretical the inverse slope mining on the the BEDDING slope stability analysis showed that decreases continuously with the mining continue to promote the stability of the sliding body coefficient, when the slide body lower edge beginning to reach full mining subsidence, landslide minimum stability coefficient, after which no change in the slope is the most dangerous. (2) Similar Simulation results show that the gently inclined coal seam mining the horizontal movement of the overlying strata value is larger than the horizontal seam mining, the rock mass is constantly sinking under the influence of mining subsidence and coal seam inclination direction, resulting in the downhill direction the shear stress and the level of tensile stress in the top of the hill larger tensile stress and the formation of surface cracks and minor damage the foot of the slope. (3) masang Bay landslide numerical analysis results show that there is a greater change with the stress distribution of coal seam mining, slope. Tensile stress zone is formed in the top of the hill, top of the hill the local tensile stress yield. The foot of the slope compressive stress and shear stress concentration and local compressive shear yield occurs. (4) The calculation shows that strength by the mining seam mining of minor mining, underground mining less impact on the stability of the slope. Masang Bay landslide area mining impact level is mid strongly masang Bay ground movement and deformation data seen. (5) masang Bay mining slope stability calculations show that in the mining influence downhill body stability coefficient continuously reduce When the seam mining Connecting After a basic steady state stability coefficient in the role of rainfall decline further, leading to a landslide.

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Rock pressure and rock movement > Rock movement
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