深部断层影响下软岩巷道变形特征与支护技术

Deep Fault-influenced Soft Rock Roadway Deformation Characteristic and Support Technology

以林南仓煤矿三水平东一输送带通路探巷为工程背景,采用现场监测方法探测了巷道围岩变形破坏特征,详细分析了距离掘进迎头不同位置处围岩变形破坏规律,通过深部位移监测得出巷道围岩松动圈范围,并采用了架喷锚注支护技术改善该类巷道变形破坏严重的状况。现场试验表明:采用U形钢配合注浆及表面喷浆的支护方式,能够有效地控制深部断层影响下软岩巷道的变形破坏,取得了较为理想的工程效果。

Deformation characteristics of surrounding rock and failure distribution,which was located in the east of the third level in the coal mine of Linnancang,were analyzed by means of field monitoring. Different distances between soft rock roadway and heading head of deformation and failure characteristics were introduced in detail. Through the deep displacement monitoring,the loose circle of tunnel surrounding rock was obtained. And the guniting anchor support with U-shaped steel was used to improve the serious condition of roadway deformation and destruction. Field test pointed out that the soft rock roadway surrounding rock of deep fault-influenced area would be kept stable by means of U-steel supporting,with the cooperation of grouting and surface guniting,and it achieves the desired effects.