软岩巷道围岩松动圈厚度测试及演化规律研究

Research on Soft Rock Drift Surrounding Rock Loose Circle Thickness Testing and Evolution Law

沙吉海煤矿属于第三系软岩矿井,在巷道掘进过程中软岩变形现象尤为突出,利用超声波围岩裂隙探测仪对沙吉海煤矿软岩巷道进行围岩松动范围的现场测试,得出同一巷道不同位置、不同时间条件下巷道围岩松动圈的厚度及其演化规律。根据测试结果,分析支护参数的合理性和可靠性,为类似软岩巷道支护设计提供依据。

Shajihai Coal Mine is the third line of soft rock in the tunneling process, especially soft rock deformation,it made surrounding rock loose range field test by using ultrasonic detector in Shajihai Coal Mine, it drew a conclusion that the thickness and evolution of drift surrounding loose circle the different position of the same roadway under different times conditions. According to test results, it pro- vides bases through the rationality and reliability support parameters analysis for a similar soft rock drift design.