特厚松散层大采深条件下地表移动规律实测研究

摘要

In order to study the law of surface movement and deformation under the condition of extra thick loose layer and great mining depth,in this paper,with establishment of surface movement observation station,analysis of measured data,developed deformation curves,the angle parameters and probability integral parameters of working face are calculated,the deformation characteristics are:Large range of mining subsidence basin,deformation relaxation;The subsidence coefficient and the main effect of tangent small;Surface is sensitivity to mining,smaller starting distance,lead influence distance becomes larger;Surface movement period become longer,active period time becomes shorter etc.%为了研究特厚松散层大采深开采条件下地表移动规律,通过地表移动实测分析,得到了地表移动的角量参数和概率积分法预计参数.特厚松散层大采深条件下地表移动规律的主要特征为:地表移动盆地范围大,变形缓慢,比薄松散层开采条件下主要影响角正切小;但地表起动距偏小(0.05H0),移动周期短(T=0.62H0小于2.5H0),活跃期短,最大下沉速度仅为2.28mm/d.