摘要
本文从随机连续介质理论出发,视地下开采引起的上覆岩层及地表移动为随机过程,分析了上覆岩层任意点的下沉分布规律。在水平煤层概率积分法的基础上,讨论了开采倾角为口的倾斜煤层的地表下沉随机介质模型。给出了采深为z_0时地表下沉单元盆地表达式为并以此给出了半无限开采和有限开采条件下地表下沉的计算方法。文中实例说明可较大地提高倾斜煤层下沉盆地的拟合精度。指出了传统的经验公式W_(max)=W_0cosα,可作为本文随机介质理论的一个直接推论。
The paper analyzes rules of subsidence distribution at any point of overlying strata based on random continuous medium theory, in which the overlying strata and surface movement caused by underground mining is regarded as a random process. On the basis of probability integration method for flat coal seam, the paper discusses surface subsidence random medium model for mining inclined seams with an angle of a. When mining depth is z_0, the surface subsidence unit basin expression is,The methods for calculating surface subsidence in semi-infinite and finite mining conditions are given.Example described in the paper indicates that the fitting accuracy of subsidence basin, when an inclined coal seam is extracted, can be greatly improved. It is pointed out that the conventional empiric formula, w_(max)=w_0cosa, can be regarded as a direct deduction of the random medium theory.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1989年第1期9-15,共7页
Journal of China Coal Society
