摘要
为了解决综放煤巷顶板锚索破断的实际问题,以内蒙利民煤矿为对象对锚索的破断机理进行了分析。研究表明,在综放开采中合理布置巷道方向,适当增大锚索的支护密度、断面面积及提高自身的抗拉极限,选择锚索、钢梁联合支护的支护形式,施加适当的预紧力,考虑金属材料的蠕变,及开发延伸率较大的新型高强度锚索,对于煤巷顶板锚索的断裂有着积极意义。煤巷锚索的破断是地应力、材料蠕变及延伸率等因素耦合作用的结果。
In order to solve the practical problem in the fracture of cables in the entry of mechanized top coal caving face,this article having carried out the preliminary analysis for background on the Li Ming Coal in Inner Mongolia Autonomous Region.Practice is testified that layout of workings should choose tunnel axial direction rationally;appropriate to increase that supporting density and crossing section of single cable and raise itself resisting the limit of drawing;to choose appropriate cables and beams supp...
出处
《太原理工大学学报》
CAS
北大核心
2008年第S1期132-134,139,共4页
Journal of Taiyuan University of Technology
关键词
煤巷顶板
锚索破断机理
地应力
roof of coal drift
fracture mechanism of anchor
cable in-situ stress
