高应力巷道围岩综合控制技术及应用研究

Surrounding Rock Comprehensive Control Technology and Application to Mine High Stress Roadway

为了研究高应力巷道围岩的稳定性及其控制技术,基于该类围岩的变形特点,分析了高应力采场巷道稳定性的3种主控影响因素及破坏机理,以适当让压、控制巷道围岩有害变形、及时封底作为支护,以巷道最大允许位移、巷道使用时间、不同围岩或采用不同支护强度的围岩变形速率作为支护的基本原则,提出了一种以预应力锚索为核心的综合锚固控制技术;最后,介绍了该综合控制技术在实施过程中应注意的几个关键问题,如进行合理的初次支护、提高初次支护结构整体强度、进行预应力锚索的二次支护、其他辅助措施等。

In order to study the stability and control technology of the surrounding rock for the mine high stressed roadway, based on the deformation features of the surrounding rock, the paper analyzed three major control influence factors and the failure mechanism for the stability of the high stressed roadway. With the suitable yielding to control the surrounding rock harmful deformation of the mine roadway, timely sealing the floor as the support of the roadway, based on the max allowed deformation value, roadway application time, different surrounding rock and different support strength surrounding deformation rate as the support basic principle, the paper provided a compre- hensive anchoring control technology with pre-stressed anchors as a key point. Finally the paper introduced the several key problems in the implementation of the comprehensive control technology, such as the rational initial support, initial support structure integrated strength improved, second support of the pre-stressed anchor and other auxiliary measures.