Roof collapse accidents, potentially in the association with lithology and occurrence of roof terrane etc., are termed to be one of the most severe calamities in the coal mine exploitation activities. The thickness of weak terrain as one of the most critical elements in roof collapse accidents is discussed in detail here. After carrying out the mechanics analysis for roof failure in coal mines employing rock failure process analysis system (RFPA2D) developed by Northeast University, this paper conducts subsequently the numerical calculation for varying roof failure instances under different we...
