地质柱状剖面;地质柱状图
The coal seams were crossed frequently in the construction of Tianchi Coal Mine airshaft, and the gas content was great. The occurrence of coal seam situation was grasped by using borehole surveying and geologic column.
针对天池矿回风立井井筒施工中频繁揭穿煤层并且瓦斯含量较大的情况,通过打钻探煤结合地质柱状图准确掌握煤层的赋存情况;
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