软岩巷道底鼓变形机理与治理技术研究

Research on Floor Heave Deformation Mechanism and Control Technology for Soft Rock Roadway

运用FLAC3D对永煤公司某矿-550 m北翼轨道大巷底鼓机理进行分析,得出该巷道底鼓的类型为挤压流动型。由于原支护方案并未对底板进行支护,故在原支护方式的前提下提出巷道底板开卸压槽和底板锚注2种治理方法。通过FLAC3D数值模拟程序,对上述2种方法进行分析对比,并应用于工程实践,现场观测结果表明底板锚注有效地控制了底鼓和围岩变形,支护效果明显。

FLAC3Dis applied to analyze Yong'an coal company forever- 550 m north wing orbital floor drum up alleys mechanism, it is concluded that the type of floor drum up the roadway for extrusion flow type. Because the original support scheme has not carried out on the floor support, under the premise of the original support way forward roadway floor opening pressure relief groove and floor bolt two methods of governance. By FLAC3 Dnumerical simulation program, through the comparative analysis of the above two methods, and applied to the engineering practice, the observation results show that the floor bolt to effectively control the floor heave and the deformation of surrounding rock and supporting effect is obvious.