摘要
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 was no appropriate method for premining prediction of subsidence and overburden failure due to coal mining in new mining area. The engineering geological prospecting and predicting method, which includes the objectives of engineering geological prospecrting, prospecting engineering, in situ and in laboratory tests and prediction method is proposed for subsidence prediction in the coalfield prospecting stage. On the basis of the detailed investigations of engineering geolgical and hydrogeological and hydrogeological conditions, the physical and mathematical model is established, and the height of overburden failure and subsidence is predicted by numerical simulation. Then, engineering geological evalution in a comprehensive way is made by considering some aspects of engineering geological lithological suites, hydrogeological structure, heights of water-conducting fractures, seepage through protective layer and etc. . Subsidence and height of over-burden failure due to extraction of No. 3 coal seam is predicted by this method in Jinxiang coalfield. The height of water-preventing coal/rock pillars is established to be 40m. The problem of the prospect of further exploration and development is solved, and a new method for subsidence research is proposed.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
1991年第6期41-46,共6页
Coal Geology & Exploration
