贵州六盘水水城矿区小牛煤矿钻孔中断层发育特征分析

Analysis on Fault Characteristics in Holes of Xiaoniu Coal Mine in Shuicheng Mining Area

摘要:

利用钻探岩心识别断裂形变、挤压扭曲、岩心破碎带等断层标志, 有利于勘探区构造地质条件的分析。通过对钻孔岩心岩性特征、地层厚度、煤层间距等方面的研究，发现ZK13钻孔在C51与C52煤层之间地层出现明显的揉皱与破碎现象、地层厚度与煤层间距增大，同时测井曲线显示地层有重复现象，推测在C51与C52煤层之间发育一逆断层；C54与C58煤层之间地层也比较破碎、地层厚度与煤层间距减小，伽玛伽玛曲线幅值增大，推测在C54与C58煤层之间发育一正断层。

Abstract:

In this paper, fault marks, such as fault deformation, shift and distortion and core fractured zone have been identified by using drilling core. It is useful to analyze structural and geological condition in mining area. Through study on lithology, thickness and coal seam interval, it is found that there is obvious rumpled structures and fragmentation phenomena between C51 and C52 in ZK13 hole, formation thickness and coal seam interval has increased, and there is a repeat phenomenon in the formation showed by drilling curves. It is guessed that there is a reverse fault between C51 and C52. There is also obvious rumpled structures and fragmentation phenomena between C54 and C58, and amplitude of Gama curve has increased. It is guessed that there is a normal fault between C54 and C58.