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Effect of Underground Coal Mining on Slope Morphology and Soil Erosion

机译：地下煤矿对坡形态和土壤侵蚀的影响

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摘要

Underground coal mining will cause large-scale surrounding rock movement, resulting in surface subsidence and irreversible deformation of surface morphology, which would lead to geological disasters and ecological environment problems. In this paper, FLAC(3D) numerical model is built based on the natural slope gradient, slope type, and included angle between the slope and working face, and their influences on the change of surface morphology and soil erosion caused by underground coal mining is studied. Research results show that the change of slope gradient caused by underground mining decreases with the increase of natural slope gradient, while slope length has opposite laws; different slope types have different changes of slope morphology. The order of slope types corresponding to gradient changes is mixed slopeuniform slopeconcave slopeconvex slope; the length of the concave and uniform slope decreases, and the convex and mixed slope length increases. When the included angle between the slope and working face is 0 degrees =alpha90 degrees, the underground mining will cause the natural slope gradient increase, the change of the slope gradient will increase with the rise of the angle, the slope length will decrease, and the rate of decrease will be reduced with the increase of the angle. Coal mining will cause the increasing of the runoff and erosion modulus of slope, mainly runoff modulus.
机译：地下煤矿将导致大规模的周围岩石运动，导致表面沉降和表面形态的不可逆变形，这将导致地质灾害和生态环境问题。在本文中，FLAC（3D）基于自然坡度梯度，斜坡型，坡度和工作面之间的角度构建了数值模型，以及它们对地下煤炭挖掘引起的表面形态和土壤侵蚀变化的影响研究过。研究结果表明，地下采矿引起的坡度梯度变化随着自然坡梯度的增加而降低，而坡度具有相反的法律;不同的斜坡类型具有不同的斜率形态变化。对应于梯度变化的斜率类型的顺序是混合斜率<均匀斜率<凹坡<凸斜率;凹形和均匀斜率的长度降低，并且凸起和混合斜率长度增加。当斜率和工作面之间的角度为0度<= alpha <90度时，地下挖掘将导致自然斜率梯度增加，斜率梯度的变化随着角度的上升而增加，斜率长度将会增加随着角度的增加，减少，减少速度将减少。煤矿将导致坡度径流增加，坡度，主要是径流模量。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第22期|5285126.1-5285126.12|共12页
  • 作者

    Liu Ning; Zhao Xiao-Guang; Song Shi-Jie; Zhou Wen-Fu;

  • 作者单位

    Xian Univ Sci & Technol Coll Geol & Environm Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Geol & Environm Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Geol & Environm Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Geol & Environm Xian 710054 Shaanxi Peoples R China;

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