破碎顶板工作面端头复合支护技术应用

Application of composite support technology to the end of work face of broken roof

为保证顶板破碎段工作面端头支护强度,对工作面回采期间端头应力分布进行分析,得出端头受到煤墙壁两侧的水平方向应力作用和顶底板来压时的垂直方向应力作用,提出利用打设锚杆、锚网索的方式进行主动支护,利用掘进期间架设工字钢棚,在回采前打设边路抬棚和中路抬棚,并在回采时加强对中路抬棚交替迈步的复合支护方式,通过复合式支护方式,提高了端头支护的强度。

in order to ensure the strength of the end end of the work face of the top plate breaking section, the stress distribution of the end head during the remining of the work face was analyzed, and the results were obtained: the end head was affected by the horizontal stress on both sides of the coal wall and the vertical direction stress when the top floor came under pressure. It is proposed to use the method of setting up anchors and anchor cables to carry out active support. During the excavation period, a workword steel shed is set up. Before the recovery, a side road lifting shed and a middle road lifting shed are set up, and the composite support method of alternately stepping on the middle road lifting shed is strengthened., The strength of end end support is improved by means of composite support.