RELATION BETWEEN SUPPORT AND SURROUNDING ROCKS OF FULLY MECHANIZED SUB LEVEL CAVING MINING WORKING FACE UNDER TWO HARD CONDITION
“两硬”条件下综放面支架围岩关系

Based on the strata control observation of the fully mechanized sub level caving mining working face 8916 in Xinzhouyao mine, the ground behaviour characteristics and the relation between the support resistance and its setting load of the fully mechanized sub level caving warking face under hard roof and hard coal seam condition are systematically discussed and the amended cantilever beam mechanical model is put forward. The mechanical relation between the support and surrounding rocks of the sub level caving working face under the two hard condition both reserves the behaviour characteristics under hard roof and possesses the special relation of the tender top coal cushion. The rational support working resistance should take the cantilever beam mechanical model as foundation and then is amended by multiplying a cushion effect coefficient.