李文

• 1:中煤科工集团重庆研究院有限公司

摘要(Abstract)：

为了分析地质构造及其演化对新疆大黄山一号井煤层瓦斯赋存的影响，对井田地质构造及演化特征、含煤地层埋藏-抬升史、煤层变质作用、瓦斯生成与赋存特征等开展研究，为大黄山一号井瓦斯灾害防治提供理论指导。研究表明：井田地处博格达山北缘逆冲推覆构造带之山前弧形逆冲断褶带，受高角度叠瓦状逆冲断层及南北向构造挤压应力控制，井田主体构造表现为一南北翼被NE、NW向共轭走滑平移断层切割的轴面南倾的弧形紧闭倒转向斜。井田含煤地层沉积后主要经历了两个阶段：第Ⅰ阶段为快速沉降，并于晚侏罗世至最大埋深4 000m左右，煤层达到气煤变质阶段，煤层瓦斯大量生成；第Ⅱ阶段为持续挤压抬升形变，煤层瓦斯大量逸散。受切向应变主动褶皱作用控制，井田向斜南北两翼向核部，煤层所受挤压应力越来越大，导致煤层孔隙率、透气性系数愈来愈小，煤层瓦斯含量及瓦斯压力愈来愈高。受东西差异性挤压弧形构造背景控制，北翼西部煤层瓦斯含量及瓦斯压力普遍高于东部，且表现出由西向东逐步降低的趋势。受走滑斜移断层控制，断层附近煤层瓦斯含量及瓦斯压力出现局部高值。

关键词(KeyWords)： 地质构造;煤层变质;煤层瓦斯;煤层压力

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基金项目(Foundation):

作者(Author): 李文

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