| 南坪矿区钼金矿段钻孔坍塌防治实践 |
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| 引用本文： | 李振学,王力功.南坪矿区钼金矿段钻孔坍塌防治实践[J].探矿工程,2011,38(3):35-37. |
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| 作者姓名： | 李振学 王力功 |
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| 作者单位： | [1]武警黄金第六支队,河南三门峡472000 [2]山东泰山地质勘探公司第四工程处,山东潍坊261206 |
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| 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。
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| 关 键 词： | 复杂地层 群体封堵 加重泥浆 南坪矿区 |
| 收稿时间： | 2010/10/14 0:00:00 |
| 修稿时间： | 2010/10/14 0:00:00 |
Practice of Borehole Collapsing Control in a Mo-Au Ore Section of Nanping Mining Area |
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| LI Zhen-xue and WANG Li-gong.Practice of Borehole Collapsing Control in a Mo-Au Ore Section of Nanping Mining Area[J].Exploration Engineering(Drilling & Tunneling),2011,38(3):35-37. |
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| Authors: | LI Zhen-xue and WANG Li-gong |
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| Institution: | 1.No.6 Detachment of the Gold Army,CAPF,Sanmenxia Henan 472000,China;2.No.4 Branch,Shandong Taishan Geological Exploration Company,Weifang Shandong 261206,China) |
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| Abstract: | 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. |
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| Keywords: | complex formation group blocking weighted mud Nanping mining area |
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