摘要
南坪矿区钼金矿段岩石受地质应力强挤压作用破碎成大小不等的碎块、碎屑,岩石节理裂隙较发育,岩心极其破碎,胶结疏松,如果冲洗液选择和操作方法不当,一旦坍塌,极易形成连锁反应,坍塌无法控制,含角砾的大颗粒岩屑随冲洗液上返途中在完整孔段孔壁间隙变小处群体封堵,导致憋泵无法冲扫,治理难度极大,历年来钻遇该地层时均有不同程度报废工作量现象。从冲洗液选择和钻进工艺方面进行了有益探索,经过ZK557、ZK477两钻孔治理实践,成功总结出应对该地层的有效方法,为该类地层的防治积累了宝贵经验。
The rocks in Mo-Au ore section of Nanping mining area are broken into blocks and clastic rocks of different sizes by geological stress with joint fissure development,loose cementing;in this case,the collapsing is easy to cause knock-on effect and would be out of control.Big particle cuttings containing breccia would block borehole with washing fluid in uphole circulation.Study was made on the selection of washing fluid and drilling technology,by the practice of borehole control on ZK557 and ZK477,effective methods to treat such formation were successfully found out.
出处
《探矿工程（岩土钻掘工程）》
2011年第3期35-37,共3页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
复杂地层
群体封堵
加重泥浆
南坪矿区
complex formation
group blocking
weighted mud
Nanping mining area
作者简介
李振学（1968-），男（汉族），陕西合阳人，武警黄金第六支队工程师，钻探工程专业，从事施工技术与管理工作，河南省三门峡市崤山西路，HJZDLZX@126．com。
