龙永煤田构造复杂，褶曲发育。
There are complex structure and fold developed in Longyong coal-field.
介绍数学地质方法在煤田构造地质学研究中的应用成果。
The paper presents the use of mathematical geology in the coadlfield constitution research.
中生代晚期SE-NW向挤压，奠定煤田构造格架的基础；
The basic framework of coalfield structure was settled under SE-NW directional compression during Late Mesozoic.
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