龙永煤田构造复杂，褶曲发育。
There are complex structure and fold developed in Longyong coal-field.
缓断裂构造普遍发育于龙永煤田各个矿区或井田。
Slow fault structure is commonly developed in every mining area or mining well in Longyong Coal Field.
从岩矿镜下鉴定资料入手，分析了龙永煤田童子岩组菱铁矿的形态特征和赋存状况。
From microscopic examination of rocks and minerals, the author analyzed morphological characteristics and occurrence status of siderite in Tongziyan Formation, Longyong Coalfield.
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