When we dig a tunnel in sericite quartz-schist with dobby drills,regular bending of the boreholes appears,which affects drilling speed and the borehole quality .
在绢云母石英片岩中开挖隧洞,使用多臂钻造孔爆破,出现钻孔有规律的弯曲现象,影响了钻爆速度和成洞质量。
The lithology and mineralogy of almandine seam deposit in sericite chlorite schist in Bilutu of Sonid Zuoqi, Inner Mongolia is studied.
本次区调工作在内蒙古苏尼特左旗必鲁图绢云母绿泥石片岩中发现了铁铝榴石矿层，并进行了岩石学和矿物学的研究。
