【摘要】 河南省洛宁上宫金矿区地质条件复杂,地层破碎,特别是中下部蚀变绿泥石化严重,遇水分散剥落坍塌,易造成下钻困难、埋钻等事故,施工难度大。针对矿区地层特点,从设备材料选型、钻孔结构、钻头选用等方面采取措施,重点应用成膜冲洗液解决蚀变破碎绿泥石化地层孔壁失稳取心钻进困难问题,取得了显著效果,为今后复杂地层施工积累了一定的经验。更多还原

【Abstract】 The geological conditions in Shanggong Gold Mine, Luoning, Henan Province are complex, where the strata are broken; in particular, the middle and lower parts are eroded into green mudstone, and will be dispersed, flaked, and collapsed when encountering water, making it difficult to drill. In view of the characteristics of the strata in the mining area, measures have been taken in aspect of equipment and material selection, borehole structure and drill bit selection with emphasis on application of the film-forming drilling fluid to solve the difficulty in coring. Remarkable results have been achieved, and some experience has been accumulated for drilling the complex strata in the future.更多还原