LiYanLong

In light of the problems often incurred by underground mining when ordinary drill jumbos are used, including large deviation between actual borehole locations and the designed ones, poor drilling precision, poor blasting performance and over-or under-blasted face phenomena, the Chambishi Copper Mine

In conventional drift excavation，midline and waistline are demarcated manually which is a complex process and prone to errors．At the same time，in the drilling process，the actual location of boreholes often deviates from the designed location，which will result in uneven excavation face