深部巷道围岩支护阻力确定及其应用

Determination and Application of the Support Resistance of Surrounding Rock Around Deep Tunnels

文章通过理论计算获取围岩压力与位移，通过绘制P-U图分析支护与位移的关系，以此确定深部巷道同岩支护阻力。分析认为：在对深部巷道围岩压力和位移进行量化计算的基础上，可以确定深部巷道围岩支护阻力范同；利用P-U图中同岩与支护的关系，可选择合理的支护技术方案和支护时间。该方法在龙同煤矿主泵房洞室支护中进行了应用，结果表明：（1）采用实际围岩力学参数计算出的巷道嗣岩压力和位移符合工程实际。深部主泵房洞室同岩支护阻力的合理范围为4～6MPa；（2）深部巷道的支护技术方案和支护时间可以依据支护阻力和P-U图确定：（3）该研究成果已成功用于煤矿工程实践。

The support resistance of surrounding rock in deep tunnels is determined by the pressure and displacement of surrounding rock obtained by theoretical calculations and the relationship between the support and displacement analyzed by the P-U figure. The range of the support resistance can be determined based on the quantitative calculation of pressure and displacement of the surrounding rock of the deep tunnel, and the support scheme and schedule can be selected considering the relationship between the surrounding rock and support in the P-U figure. This method has been applied to the support of the pump chamber of the Longgu coal mine, and the results show that ： （1） The calculated pressure and displacement of the surrounding rock conform with engineering practice and the reasonable range of support resistance of a pump chamber is 4 ~ 6MPa; （2） The support scheme and schedule can be determined based on the support resistances and P-U figure; （3） The achievements have been successfully applied to coal mine engineering.