深部巷道围岩变形破坏影响因素及控制技术研究

Study on deep roadway surrounding rock Deformation Destroy influencing factors and control technology

深部巷道围岩控制的程度严重制约深部煤炭资源的开采,以大佛寺煤矿扩大区北大巷全断面变形破坏为研究对象,通过现场监测,分析了影响扩大区北大巷稳定的因素及机理,认为高地应力、底板未支护、地下水侵蚀是造成北大巷全断面变形破坏的主要原因。针对性的提出了"长环形支架+锚杆锚索注浆"的联合支护技术,设计了详细的支护参数。通过现场监测北大巷围岩变形量,结果表明该项技术能够有效的保证深部巷道围岩稳定。

The degree of deep roadway surrounding rock control seriously confines deep coal resource mining, whole section deformation and failure of Dafosi Mine enlarging area north roadway was taken as study object, through field monitoring, factor and mechanism influencing the stability of the roadway were analyzed, high ground stress, floor without support, groundwater erosion were the main factors. Long ring support ＋bolt and anchor cable grouting combined support was put forward, the support parameters were designed. the deformation quantity of the roadway by the field monitoring showed that the technology could ensure the efficient surrounding rock stability of the deep roadway.