南票煤田三家子井田侵入岩特征及其对煤层影响程度分析.docx

第2l卷10期 第2l卷10期 中国煤炭地质 V01．21 No．10 2009年10月 COAL GEOI，OGY OF CHINA Oct． 2009 doi：10．3969／j．issn．1674-1803．2009．10．006 文章编号：1674-1803(2009)10-0020-06 南票煤田三家子井田侵入岩特征及其对煤层影响程度分析 佟德文．王立君 (东北煤田地质局155队，辽宁锦州121001) 摘要：三家子井田位于南票煤田西南段，呈一弧顶凸向东南方向的弧形构造。根据井田大量钻孔资料分析，区内侵 入岩发育，主要有酸性花岗斑岩、中性的闪长斑岩及基性的辉绿岩。其中酸性花岗斑岩分三个源区由北向南、由西向 东侵入井田含煤地层，全区发育，以复式层间侵入为主，有l一24个分层，单层厚度0．07—19．78m，破坏了3、6、7、8四 个煤组，尤以6煤组二煤受破坏最为严重；中性侵入岩闪长斑岩分布在5线以西及东北部21—24线，以岩墙侵入为 主，其特点是厚度大，分层少，l一2层，分层厚度58．6～94．09m。由于侵入岩影响使煤层失去连续性，造成煤层对比、估 算储量及开采困难．甚至失去经济价值。 关键词：侵入岩；岩性特征；产出状态；煤层影响程度 中图分类号：P588．12 文献标识码：A Intrusive Rock Characteristics and Analysis of Its Impact Extent onto Coal Seam in Sanjiazi Minefield，Nanpiao Coalfield Tong Dewen，Wang Lijan (No．155 Exploration Team，Northeast China Bureau of Coal Geological Exploration，Jinzhou，Liaoning 121001) Abstract：The Sanjiazi minefield is located in southwestern sector of the Nanpiao coalfield，takes with its top direct towards southeaBtem．Based analysis of plentiful borehole data．found that there well developed intrusive rocks in the area,mainly acidic granite—porphyry．intermediate diorite—porphyry and basic diabase．The acidic granite—porphyry has three and intruded coal seams from north south，east to and developed in whole minefield，mainly in the form of compound interstratified intrusion，totall-24 layem，single layer thickness O．07-19．78m，have destructed Nos．3，6，7 and 8 coal groups， especially No．2 coal seam in the No．6 coal group．The intermediate diorite-porphyry is distributed to the of No．5 exploration line and between Nos．21-24 exploration lines in the northeastern part，mainly in the form of dike with large thickness and few(1-2) 1ayers，single layer thickness 58．6-94．09m．Because of the intrusion，caused coal lost their continuity and hard correlate， estimation and mining，even lost their economic values． Keywords：intrusive rock；occu