中文摘要：

围岩松动范围及其变化是巷道围岩稳定性评价和支护的重要参数之一,如何快速准确地探测松动圈范围,更好地为工程服务,成为现今深部开采矿井研究的热点.以城郊矿深部延伸巷道围岩支护及破坏特征为背景,在总结前人关于巷道围岩松动圈成果的基础上,采用实测和数值模拟2种方法,对城郊矿二水平围岩松动圈范围进行对比研究.实测选取二水平围岩巷道的5个测站,采用地质雷达进行测试,得出了5个测站的围岩松动圈的横向测试断面围岩破坏特征差异较大,既有相对完好围岩,又有松散破碎较严重的围岩;纵向测线上巷道不同断面位置,围岩松动范围差异较大,介于1.4～2.8m,这种差异与地质条件和矿山压力密切相关.数值模拟获取了城郊矿深部软岩巷道的围岩松动圈范围介于2.0～3.0m.综合分析数值模拟及地质雷达研究结果,确定出城郊矿深部软岩巷道的松动圈范围介于1.4～3.0m.研究结果对城郊矿深部延伸巷道围岩支护方式的选择具有重要的参考价值.

英文摘要：

Surrounding rock looseness range and its variation is one of the important parameters in the stability evaluation and support of roadway surrounding rock. How to quickly and accurately detect the loosen range and provide better service for the project has become a hot current in deep mining research. Under the background of the support of deep extending roadway sur- rounding rock and failure characteristics in Chengjiao mine,based on summarizing the achievement on loose circle from the pre- decessor,two horizontal rock loose circles in Chengjiao mine are comparatively studied by adopting both tests and numerical simu- lation. The measurement was taken from 5 stations at two horizontal roadways by using ground penetrating radar test, getting that there are large differences in failure characteristic of surrounding rocks at the transverse sections of 5 stations. Some rocks are rel- atively intact, and some are seriously loose and broken. Difference of surrounding rock looseness range in vertical line of different section of roadway were large and ranged between 1.4 - 2.8 m. This difference are closely related with geological conditions and mining pressure. The looseness of surrounding rock of deep soft rock roadway in Chengjiao Mine ranged obtained by the numerical simulation between 2.0 - 3.0 m. The numerical simulation and the geological radar research results were comprehensively ana- lyzed to determine the range of loose circle in deep soft rock roadway in Chengjiao Mine ranged between 1.4 - 3.0 m. The results have important reference value for selecting the deep extended roadway support in Chengjiao Mine.