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根据穆龙陶矿床第Ⅳ期工程的技术经济论证,露天矿的深度将增加到550～630m,运输排土场的总高度预计增加到160～170m。在露天矿开采期间,已记录了22次边帮和排土场稳定性被破坏的事故,原因是边坡附近的岩休(有强烈的构造破坏、蚀变的风化岩石带和节理)和排土场地的工程地质条件不好。随着露天矿深度的增加和排土场高度的增大,变形范围可能扩大并将出现更危险的处境。因此,为了保证露天矿和排土场作业安全,必须研究和运用保持台阶、边帮和排土场稳定性的方法。
According to the techno-economic demonstration of Phase IV project of Mu Longtao deposit, the depth of the open pit mine will increase to 550-630m, and the total height of the transport dump will be increased to 160-170m. During the open-pit mining period, 22 accidents of collapse of the sidewalks and dumping sites have been recorded because of rock breakages (intense tectonic damage, altered weathered rock zones and joints) and rows near the slope Soil engineering site geological conditions are not good. With the increase of surface mine depth and the increase of dump site height, the deformation range may expand and a more dangerous situation will emerge. Therefore, in order to ensure the safety of open-pit mines and dumps, it is necessary to study and apply the methods of maintaining the stability of steps, fronts and dumps.