青海野马泉矿区岩石可钻性的分析和应用

Analysis and Application of Rock Drillability in Qinghai Yemaquan Mine

摘要:

青海野马泉整装勘查矿区在以往的钻探生产中施工难度大，钻头寿命短，提下钻频繁，导致施工周期长，成本高。由于矿区岩石的可钻性不明，钻头适用效果差。通过现场调研、采集岩样，进行室内试验测试（包括薄片分析，XRD测试等），获得了石英含量、石英粒度、长石含量、长石粒度等数据，通过分析计算确定了矿区的岩石可钻性，据此设计选用了钻头。野外试验表明，钻头钻进效果好、性价比高。

Abstract:

Drilling construction was difficult in Qinghai Yemaquan mine, diamond bits were replaced frequently during exploration, which caused low bit service life, long construction period and high cost. All these were due to the unclear drillability in the mine and the adopted diamond bits did not adapt to the drilled strata. By the on-site survey, rock sampling and the indoor test, including thin section analysis and XRD test, the quartz content, grain size of quartz, feldspar content and feldspar granularity etc. were obtained to determine the rock drillabiligy. Based on these data, the diamond bits were selected. The outdoor test results show that the selected diamond bits work well with high performance- price ratio.