ABSTRACT
Influenced by many kinds of factors of geology, hydrology, water, the law of surface rock movement parameter with thick unconsolidated layer compare with general underground mining has particularity and complexity the law of surface movement, formation mechanism, Prediction method and parameters have been difficults at home and abroad. The law of surface movement and formation mechanism for underground coal minig with thick unconsolidated layer were studied. It has very great significance to predicate ground subsidence and protect the buildings and the facilities.
