我队钼矿区勘探初期用钢粒钻进,由于矿层软,岩心采取率低,无法得出正确评价。从一九七四年起用金刚石钻进后,保证了钻探质量,取得了良好地质效果。由于该矿区地表有厚约30~150米的石英岩,节理发育,坚硬破碎,研磨性强,钻进时掉块、坍塌和漏水现象严重,对金刚石钻进很不利,严重影响钻头寿命,影响整个钻孔的顺利施工。 In the early stage of exploration of our team’s molybdenum mine, steel balls were used to drill. Due to the softness of the mine bed, the core taken rate was low, which could not be evaluated correctly. After drilling with diamond since 1974, it has ensured the drilling quality and achieved good geological results. As the surface of the mining area has a thickness of about 30-150 meters of quartzite, joint development, hard crushing, grinding strong, drilling block, collapse and leakage serious, diamond drilling is very bad, seriously affecting the life of the drill, the impact Smooth drilling of the entire construction.