综采工作面顶板厚度确定及支护强度的选择

Determination of Thickness of Roof at Fully-mechanized Face and Selection of Working Resistance of Hydraulic Support

以单侯矿6103N综采工作面为实例,利用平时实测数据及冒高公式、充满采空区所需直接顶垮落厚度公式等来确定直接顶、老顶的厚度,从而利用工作面直接顶初次垮落期间、老顶初次来压期间所需的支护强度及经验公式来判断所选支架是否满足矿压要求。

By way of example,at the fully-mechanized face 6103N at Danhou Coal Mine,the thickness of immediate and main roofs are first determined based on the data actually observed in normal times as well as the data obtained using the formula for calculating the height of caving zone and the immediate roof caving thickness required to pack up the worked-out area.And then,a selection is made of the support based on the bearing values of support required during the initial caving of immediate roof and initial weighing of main roof,as well as the data obtained using empirical formula,to make sure that the support selected is sufficient to bear the rock pressure.