甘肃李坝金矿区强水敏分散剥落地层冲洗液的选型与使用

Selection and Application of Flushing Fluid for Strong Water Sensitive Stratum in Liba Gold Mine of Gansu

摘要:

李坝金矿区位于甘肃省陇南市礼县，为甘肃的中型金矿床之一。矿区地层复杂，存在多层构造角砾岩及千枚岩，吸水易分散剥落导致孔壁坍塌。针对矿区地层特点，采用具有良好隔水及强抑制性特点的成膜防塌无固相冲洗液护壁，钻进效率高，共完成钻探工作量2000余米，成功地解决了该矿区遇水易分散剥落地层的孔壁坍塌问题，并显著提高了取心率与取心质量。

Abstract:

Liba gold mine is located in Lixian County of Longnan City in Gansu Province, which is one of the medium-sized gold deposit in Gansu. The stratum of mining area is complex with the existence of tectonic breccia and phyllite which have the characteristics of strong water sensitivity, and hole wall collapse happens easily. According to the characteristics of mining area stratum, the solid-free flushing fluid with characteristics of film-forming and anti-collapse has been adopted and more than 2000 meters of drill workload have been completed. The results of field application indicate that this flushing fluid system has good film-forming ability and inhibitive capacity, the hole wall collapse was successfully resolved in this mining area, and the coring recovery and coring quality are markedly improved.