近距离巷道群覆岩活动的扩大压力拱理论与岩柱荷载研究

Research on Expansive Pressure Arch Theory and Rock Pillar Load about the Activity of the Covered Rock Mass in Close Laneways

随着各类采矿工程和其它岩土工程的不断发展,越来越多的地下工程都涉及到近距离巷道群的设计、施工与维护问题。近距离巷道群围岩的变形破坏规律和巷间岩柱荷载计算成为地下工程界十分关注的热点课题之一。在对单个巷道周围有极限平衡区应力分布规律研究的基础上,结合巷道覆岩活动的压力拱理论,系统研究了近距离巷道群周围的应力分布规律,提出了近距离巷道群覆岩活动的"扩大压力拱"理论,给出了计算近距离巷间岩柱荷载的计算公式,提出了防止近距离巷间岩柱连锁破坏的技术措施。

With the constant development of mining and other geotechnical engineering,more and more underground engineering will relate to the design,construction and maintenance of the close laneways.Deformation and failure law of the covered rock mass in the close laneways and the calculating of rock pillar load among laneways become one of the hot topics in the field of underground engineering.Based on study on the stress distribution of single laneway with limit equilibrium area,combining with the pressure arch theory about the activity of the covered rock mass in laneway, this paper systematically studies the stress distribution in close laneways, proposes the expansive pressure arch theory about the activity of the covered rock mass in close laneways, gives calculating formula of rock pillar loads among laneways, and points out technical measures to avoid the chain failure of the rock pillar in close laneways.