河南马桥北马庄矿区二2煤层煤岩煤质特征及瓦斯含量分带性  

Characteristics of lithotype,coal property and the zonation of gas content in Ⅱ2 coalbed,Maqiaobei-Mazhuang coal mine,Henan Province

作　　者：唐石山 许亚坤 张欣 TANG Shishan;XU Yakun;ZHANG Xin(No.4 Institute of Geological&Mineral Resources Survey of Henan,Zhengzhou 450000,Henan,China)

机构地区：[1]河南省地质矿产勘查开发局第四地质矿产调查院,河南郑州450000

出　　处：《矿产勘查》2020年第7期1393-1399,共7页Mineral Exploration

摘　　要：根据最新的地质勘查成果,结合测试化验结果,研究了河南省马桥北马庄矿区主要可采的二2煤层的煤岩煤质特征、瓦斯含量、成分及分带性。研究表明,马桥北马庄矿区二2煤层位于下二叠统山西组,埋深800~2710 m,区域厚度分布稳定,平均厚度3.01 m,为低-中灰、特低-低硫、特低磷、高-特高热值的无烟煤和贫煤。煤层中的瓦斯成分以CH4为主,N2次之,CO2少量;瓦斯含量普遍大于8 m3/t,受构造及煤层埋深控制,埋深1050 m以下为甲烷带。本次研究为以后进一步探讨该矿区瓦斯的富集条件及赋存规律提供了基础资料。According to the latest geological exploration results,combined with the test results,this paper studies the lithotype and coal quality characteristics,gas content、composition and zoning of the main minable Ⅱ2 coalbed in Maqiaobei&Mazhuang mining area.The study shows that the Ⅱ2 coalbed in Maqiaobei&Mazhuang coal mine is located in the lower Permian Shanxi Formation,the buried depth of Ⅱ2 coalbed is 800-2710 m,and the regional thickness distribution is stable,with an average thickness of 3.01 m.It is anthracite and lean coal with low-medium ash,ultra-low-low sulfur,ultra-low phosphorus and high-ultra-high calorific value.The gas composition is mainly CH4,followed by N2,with a small amount of CO2.The gas content is generally greater than 8m3/t,controlled by the structure and coal seam buried depth,the methane belt is below 1050 m buried depth.This study provides basic data for further discussion of gas accumulation conditions and occurrence rules in the mining area.

关 键 词：煤岩 煤质 瓦斯 马桥北马庄 河南省 

分 类 号：P618.11[天文地球—矿床学]