南山矿深部高应力软岩矿物学特征研究

Study on Mineralogical Characteristics of High Stress Soft Rock at Depth of Nanshan Mine

为了确定鹤岗南山矿深部高应力软岩巷道变形力学机制和支护对策,运用X-射线衍射、X-射线能谱分析与扫描电镜测试等技术手段,对巷道高应力软岩的矿物学特征进行实验研究。南山矿深部高应力软岩微裂隙发育,主要矿物成分为石英、长石和粘土矿物。长岩有淋滤蚀变现象,粘土矿物以伊/蒙混层为主,混层比较低,伊/蒙混层中蒙脱石以钠蒙脱石为主,混层中主要单晶形态呈丝发状、条片状、羽毛状及波状薄片,集合体形态呈蜂窝状、网络状、颗粒包壳状、"之"字形排列及毛发状,粒间孔隙中粘土矿物主要产出状态有桥式、分散质点式和薄膜式。

To determine the deformation mechanical mechanism of roadways in high-stress soft rock at depth in Hegang Nanshan Mine and the roadway support measures, study was made on the mineralogical characteristics of the rock by X-ray diffraction, X-ray energy spectrum analysis and scanning electronic microscope. The results indicate that the rock has developed fissures and contains mainly quartz, feldspar and clay minerals. The feldspatite has leaching alteration phenomenon, The clay is mainly composed of illite/smectite interstratified layer that mainly contains smectite. The monocrystals in the mixed layer are mainly in filamentous, lath-like, feathery and wavelike sheet shapes, and the crystal aggregates are ho- neycomb-like, network-like, granular, flexuous and hair-shaped. The clay minerals occur in inter-granular pores mainly in bridge, scattered and film-like shapes.