摘要
金桥煤矿四采区东部发育一陷落柱,为了进一步探明陷落柱发育形态及范围,优化采区设计,消除奥灰水通过陷落柱进入矿井造成水害隐患,采用地面丛式定向井钻探技术(1个主孔,4个分支孔)对陷落柱发育范围进行探查。通过对钻探取芯、岩屑录井、数字化测井资料进行综合分析判断,探明了陷落柱发育范围,陷落柱长轴长约68 m,短轴长约47 m,面积约0.00255 km^(2),比三维地震探勘范围减少了0.00393 km^(2)。为了验证地面丛式定向井探查的可靠程度,施工了7个井下验证钻孔,累计完成钻探工程量590 m。钻探资料表明,两者所探查范围基本一致,地面丛式定向井探查技术精度达到米级。结果表明,地面丛式定向井技术实现了小型陷落柱发育范围的精准探查,为探查陷落柱的范围提供了一种有效的手段。
A collapsed column develops in the east of the fourth mining area of Jinqiao Coal Mine.In order to further explore the development form and scope of the collapsed column,optimize the mining area design,and eliminate the hidden danger of water damage caused by Ordovician limestone water entering the mine through the collapsed column,the ground cluster directional well drilling technology(1 main hole,4 branch holes)was used to probe the development range of the collapsed column.Through the comprehensive analysis and determination of drilling core,rock cuttings logging and digital logging data,the development range of the collapsed column was proved.The long axis of the collapsed column was about 68 m,the short axis was about 47 m,and the area was about 0.00255 km^(2),which was reduced by 0.00393 km^(2) compared with the three-dimensional seismic exploration range.In order to verify the reliability of ground cluster directional well exploration,seven downhole verification holes were constructed,and a total of 590 m of drilling work was completed.According to the drilling data,the exploration range of both was basically the same,and the accuracy of the ground cluster directional well exploration technology reached the meter level.The results show that the ground cluster directional well technology can realize the accurate exploration of the development range of the small collapsed column,and provides an effective means to explore the scope of the collapsed column.
作者
高玉超
李永雷
王芳
Gao Yuchao;Li Yonglei;Wang Fang(Jining Mining Group Mineral Resources Exploration and Development Co.,Ltd.,Jining 272000,China;Jining Energy Development Group Co.,Ltd.,Jining 272000,China;Jinqiao Coal Mine in Jining City,Jinxiang 272200,China)
出处
《能源与环保》
2024年第2期163-170,共8页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
丛式定向井
陷落柱
井下钻探
验证钻孔
探查手段
cluster directional well
collapsed column
downhole drilling
verification drilling
exploration means
