摘要
针对大埋深大断面软岩巷道围岩变形严重,反复维修工程量大,底鼓突出的问题,结合工程实践,分析了巷道的底鼓的变形机理,并采用数值模拟方法研究巷道的变形破坏规律及影响因素。给出了大断面软岩上山底鼓治理技术方案,确定了锚注联合支护技术的设计参数。现场应用表明,采用锚索、底脚底板注浆锚杆和槽钢耦合支护底鼓控制方法,有效地控制了巷道的底鼓变形,取得了良好的围岩控制效果。
Aiming at the problems of severe deformation of surrounding rock,large amount of repeated maintenance and floor heave protrusion in large embedded depth large section soft rock roadway,combining with engineering practice,deformation mechanism of roadway floor heave is analyzed,and the deformation and failure law and influencing factors were studied by numerical simulation method.Treatment scheme of uphill floor heave in large section soft rock was proposed and the design parameters of bolt-grouting combined support technique were determined.Field application shows that the controlling floor heaves means of using anchor and floor grouting bolting and channel steel coupling support can effectively control the deformation of roadway floor heaves,which achieve good control effect of rock.
出处
《煤矿安全》
CAS
北大核心
2012年第4期34-37,共4页
Safety in Coal Mines
关键词
底鼓
软岩
巷道
锚注
大断面
floor heave
soft rock
roadway
bolt-grouting
large section
