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对新矿区开采沉陷及覆岩破坏的采前预计以往没有合适的方法。本文提出了在勘探阶段进行开采沉陷预计的工程地质方法,包括工程地质勘探的任务、勘探工程、室内外试验和预计方法等。预计方法从详细的工程地质条件和水文地质条件调查出发,建立物理数学模型,通过数值计算预测覆岩破坏高度和地表沉陷,并从工程地质岩组、水文地质结构、导水裂隙带高度、保护层渗流、地表沉陷等方面进行工程地质综合评价。利用这一方法预计了金乡矿区3号煤开采后的地表沉降变形及覆岩破坏高度,将防水煤柱确定为40m,从而解决了金乡矿区进一步勘探和开发的前途,也为开采沉陷研究提供了一种新的方法。
There is no suitable method to predict the mining subsidence and overburden destruction in the new mining area in the past. This paper presents engineering geology methods for prospecting subsidence in exploration stage, including tasks of engineering geological prospecting, exploration engineering, indoor and outdoor tests and prediction methods. The prediction method is based on detailed engineering geological conditions and hydrogeological conditions investigation. The physical mathematical model is established, the height of overburden destruction and surface subsidence are predicted by numerical calculation. From the engineering geological rock group, hydrogeological structure, the height of water-conducting fracture zone, Layer seepage, surface subsidence and other aspects of engineering geological comprehensive evaluation. This method is used to predict the settlement and deformation of the surface of No.3 coal in Jinxiang mining area and the height of the overburden rock. The waterproof coal pillar is determined to be 40m, so as to solve the prospect of further exploration and development in Jinxiang mining area. Provide a new method.