关键词: 浅埋煤层, 非充分采动, 地表移动规律, 概率密度函数法

Abstract:

The surface movement law caused by insufficient mining shallow buride coal seam is different with the sufficient mining, the paper was based on S1210 working face of NingTiaota coal mine, and conducted field research of the surface movement law of insufficient mining shallow buride coal seam, results indicated that ground surface settlement experienced stabilization stage and sudden change stage before startup, active and decline stage. Based on probability density function method, a MTLAB nonlinear matching procedure was established, by using measured data to match the predicting formula,the matching result was coincide with the actual condition. Based on the predicting formula, surface movement main parameters was calculated, the parameters was accord with the actual value, and has high reliability, and could provide reference basis for back stoping of other working surface or other similar insufficient mining, and could accurately predict the shape and range of surface subsidence basin caused by insufficient mining shallow buride coal seam.

Key words: shallow buride coal seam, insufficient mining, surface movement law, probability density function method