摘要
花草滩煤矿区地处北祁连褶皱带中段北侧,酒东盆地东端。古生界和中生界地层在区内发育较完整,其中石炭系太原组为含煤地层。经二、三维地震勘探、钻探等工作证实矿床总体上受单斜构造控制。石炭纪中期盆地呈逐渐上升趋势,沉积相演化经历了由海相逐渐过渡到海陆交汇相,再到陆相沉积的阶段。F5和F8断层具顺层断裂特征,破坏煤层的连续性,在一定程度上控制了瓦斯突出区的分带,可作为煤矿瓦斯含量高低的分界标志。
Huacaotan coal mining area was located on the north side of middle section of North Qilian folded belt and on the east end of Jiudong basin.The formations of Palaeozoic and Mesozoic age developed relatively well in this area and Carboniferous Taiyuan Formation was the coal-bearing formation.Through 2D and 3D seismic prospecting and drilling prospecting works,it was verified that the deposit was controlled by a single monoclinal structure.The basin rose gradually in middle Carboniferous age,and the evolvement of sedimen-tary facies underwent changes from marine facies to marine-terrigenous facies and then to continental sedi-mentation.Fault F5 and F8 ,characterized by bedding fractures,broke the continuity of coal beds and con-trolled the zoning of gas outburst area to some extent,and they can be regarded as the bounding indicators of high and low gas content in coal mine.
出处
《矿产与地质》
2015年第3期342-347,共6页
Mineral Resources and Geology
关键词
煤矿
沉积相演化
地震解译
地层厚度
控矿因素
coal mine,sedimentary facies evolvement,seismic interpretation,formation thickness,ore-controlling factor
