The Digital method for Calculating the Rational Support Capacity in a Coal Mining Workface

Abstract：This paper analyzes the results of the UNDEC simulation for surrounding rock displacement of a mining workface.The results indicate that with differing geology and technical conditions, the balanced structural position is not linear with the mining height.The two types of balanced structures consist of a stable structure and a seemingly stable structure.The author provides the calculation formula for the rational support capacity and applies it to workface 7103 in Shuiyu Colliery and workface 3308 in Chengzhuang Colliery.

Keyword：Digital simulation;Seeming balance structure;Support capacity;