Analysis of the hole drilling’s quality and countermeasures

In-situ tests and theoretical analysis were done in Jiashi copper mine Xinjiang to get the information of the quality of deep holes drilling.The measured data management were done coordinated with Excel software.And then principles of this method (plane perspective and sectional perspective) is drawn with CAD.Counter-measures for the situation were proposed after this.It shows that KXP-2D is an effective tool for the inclination survey in deep holes drilling.As the poor stability of ore-body，with the depth increase of holes，drilling axial deviation shows a trend of increase.The borehole bottom collapse when it’s depth passes 25m，rows 5 and 6 were drilled into the surrounding rocks and affect the quality of holes.So for the ore-body that the hole were drilled into surrounding rocks，short-hole shrinkage method was applied.For others that drilling holes were inside the ore-body，VCR mining method was applied to meet the need of safety and economic requirements.