巨龙铜矿排水巷岩石力学试验与稳定性分级

Rock Mechanics Test and Stability Evaluation of Long Distance Drainage Lane in Julong Copper Mine

以巨龙铜矿长距离排水巷道为研究对象,施工15个钻孔进行岩石取样,采用单轴压缩试验探究了天然、干燥和饱水条件下岩石抗压强度。利用剪切实验研究了不同区域岩石的内聚力和内摩擦角。结果表明,微风化英安岩强度最大,岩性较好,微风化千枚岩和微风化凝灰岩次之,强风化凝灰岩和断层角砾岩强度最低,岩性最差,并利用BQ法进行岩体稳定性分级。

Taking the long-distance drainage tunnel of Jurong Copper Mine as the research object,15 drill holes were constructed for rock sampling,and uniaxial compression test was used to investigate the compressive strength of rocks under natural,dry and water-saturated conditions.The cohesion and angle of internal friction of rocks in different areas were investigated using shear experiments.The results show that the slightly weathered Yingan rock has the highest strength and good lithology,the slightly weathered Chimelite and slightly weathered Tuff are the next strongest,the strongly weathered Tuff and fault breccia have the lowest strength and the worst lithology,and the rock stability grading is carried out by using the BQ method.