浚县新镇一带二_1煤层煤岩煤质特征及瓦斯含量分析
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摘要
研究区位于东濮找煤区的成矿带上,主要发育二叠系下统山西组二_1煤层,含煤区内全区可采,为主要可采煤层,煤层埋深900~2 200 m,结构简单,厚度较稳定,平均可采厚度5.75 m。为了解研究区的二_1煤层煤岩煤质特征及瓦斯含量,采取钻孔煤心样7孔17个样,分析了二_1煤的煤层特征、煤岩成分与宏观煤岩类型、显微煤岩组分特征及煤的化学性质、工艺性能,研究了煤类分布特征,并对煤层瓦斯成分及含量进行了测试分析。结果表明,二_1煤煤质为低中灰、高发热量、特低硫—低硫、特低磷—中磷,煤类为无烟煤、贫煤、贫瘦煤和焦煤;煤层中瓦斯受大构造及煤层埋深影响,F_5断层以南区域瓦斯易于逸散,瓦斯含量较低;而F_5断层以北断陷区域内构造不发育,煤层埋藏较深且厚度较大,瓦斯含量普遍较高。这些成果将对研究区及周边深部找矿及矿床经济意义评价具有指导意义。
The research area was located at the mineralization belt in Dongpu coal searching area,and the main coal seam was Ⅱ_1 coal seam from lower permian system Shanxi group. In the coal bearing area,all of the coal was available to be excavated,which makes this area the main workable coal seams. The burial depth of coal-bed ranges from 900 m to 2 200 m; structure of the coal bed was simple; the thickness of coal seam is stable,and the average minable thickness was 5. 75 m. To measure the quality of Ⅱ_1 coal seam,coal quality and coal lithotype and gas content in the research area,17 samples of 7-hole drilled coal core are taken,and the features and content ofⅡ_1 coal seam were analyzed. At the same time,the macrolithotype of coal,microlithostructure,chemical property and processing property were evaluated; moreover,coal rank distribution features were researched,and gas content and gas composition were measured. The results showed that the quality of Ⅱ_1 coal seam was mid-low ash,high calorific value,especially low to low in Sulphur and phosphorous;the coal types consist of anthracite,meagre coal,meagre-lean coal,and coking coal. Affected by the megageotectonics and coal bed burial depth,to the south of fault F_5,the gas in coal bed was likely to effuse,and the content of gas was low. To the north of fault F_5,the faulted area was not well-developed,so the coal bed was deeper and thicker,and the gas content was higher. These findings will be guidance and reference for evaluating the economic significance of deep prospecting and deposit in adjacent areas.
The research area was located at the mineralization belt in Dongpu coal searching area,and the main coal seam was Ⅱ_1 coal seam from lower permian system Shanxi group. In the coal bearing area,all of the coal was available to be excavated,which makes this area the main workable coal seams. The burial depth of coal-bed ranges from 900 m to 2 200 m; structure of the coal bed was simple; the thickness of coal seam is stable,and the average minable thickness was 5. 75 m. To measure the quality of Ⅱ_1 coal seam,coal quality and coal lithotype and gas content in the research area,17 samples of 7-hole drilled coal core are taken,and the features and content ofⅡ_1 coal seam were analyzed. At the same time,the macrolithotype of coal,microlithostructure,chemical property and processing property were evaluated; moreover,coal rank distribution features were researched,and gas content and gas composition were measured. The results showed that the quality of Ⅱ_1 coal seam was mid-low ash,high calorific value,especially low to low in Sulphur and phosphorous;the coal types consist of anthracite,meagre coal,meagre-lean coal,and coking coal. Affected by the megageotectonics and coal bed burial depth,to the south of fault F_5,the gas in coal bed was likely to effuse,and the content of gas was low. To the north of fault F_5,the faulted area was not well-developed,so the coal bed was deeper and thicker,and the gas content was higher. These findings will be guidance and reference for evaluating the economic significance of deep prospecting and deposit in adjacent areas.
引文
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[13]李希建,林柏泉.煤与瓦斯突出机理研究现状及分析[J].煤田地质与勘探,2010,38(1):7-13.Li Xijian,Lin Baiquan.Status of research and analysis on coal and gas outburst mechanism[J].Coal Geology&Exploration,2010,38(1):7-13.
[14]张连强,袁关涛,逯振芳.地质特征对煤层瓦斯赋存的影响分析[J].中州煤炭,2016(3):133-137.Zhang Lianqiang,Yuan Guantao,Lu Zhenfang.Analysis on influencing of geological characteristics on occurrence of coal seam[J].Zhongzhou Coal,2016(3):133-137.
[15]牛永斌,朱信生,胡斌.河南省二叠系山西组煤与煤层气富集规律及其主控因素[J].中国煤层气,2015,12(1):7-13.Niu Yongbin,Zhu Xinsheng,Hu Bin.Accumulating discipline and main control factors of coal and CBM in Shanxi Formation of the fermian series in Henan Province[J].China Coalbed Methane,2015,12(1):7-13.
[2]张琳,张慧利,杜婉怡,等.浚县新镇一带煤系地层地质构造及其勘查方法研究[J].中国煤炭,2016,42(11):30-33.Zhang Lin,Zhang Huili,Du Wanyi,et al.Study on geologic structure of coal measure strata in Xinzhen of Xun County and its exploration methods[J].China Coal,2016,42(11):30-33.
[3]张琳,张慧利,于增宝,等.河南省内黄隆起区找煤地震技术应用研究[J].中州煤炭,2016(8):131-136.Zhang Lin,Zhang Huili,Yu Zengbao,et al.Research on application of coal seismic technology in area of Neihuang uplift,Henan Province[J].Zhongzhou Coal,2016(8):131-136.
[4]河南省地质矿产局.河南省区域地质志[M].北京:地质出版社,1989.
[5]张琳,景喜林,张慧利,等.地震概查在快速找煤中的应用效果[J].工程地球物理学报,2013,10(6):840-844.Zhang Lin,Jing Xilin,Zhang Huili,et al.Application of seismic exploration to looking for coal quickly and its effect[J].Chinese Journal of Engineering Geophysics,2013,10(6):840-844.
[6]李元建,范云霞,刘素青,等.河南石炭二叠系煤层煤质特征与综合利用研究分析[J].洁净煤技术,2010,16(6):54-57,60.Li Yuanjian,Fan Yunxia,Liu Suqing,et al.Analysis of coal quality characteristics of Carboniferous and Permian coal seam and development of CCT in Henan Province[J].Clean Coal Technology,2010,16(6):54-57,60.
[7]周丽丽.岩浆岩侵入对煤质的影响[J].洁净煤技术,2014,20(1):37-40.Zhou Lili.Influence of magmatic rock intrusion on coal quality[J].Clean Coal Technology,2014,20(1):37-40.
[8]周尽晖,丁玲.炼焦煤质量评价与问题分析[J].洁净煤技术,2014,20(4):61-64.Zhou Jinhui,Ding Ling.Quality evaluation of coking coal and problem analysis[J].Clean Coal Technology,2014,20(4):61-64.
[9]郭海英.鹤壁石林勘探区二1煤煤质特征[J].洁净煤技术,2015,21(3):6-10.Guo Haiying.Coal quality characteristics ofⅡ1coal seam in Shilin exploration area of Hebi City[J].Clean Coal Technology,2015,21(3):6-10.
[10]吕贵友.鹤岗矿区煤变质特征及变质规律[J].中国煤田地质,2005,17(3):15-16.LüGuiyou.Coal Metamorphic traits and patterns in Hegang Coalfield[J].Coal Geology of China,2005,17(3):15-16.
[11]冯斌,李文前,郭新体,等.河南顺和西矿区Ⅱ2煤层煤岩煤质特征及瓦斯含量分带性[J].中国矿业,2013,22(4):118-126.Feng Bin,Li Wenqian,Guo Xinti,et al.The character of lithotype and coal property and the zonation of gas content inⅡ2coalbed,Shunhexi Coal Mine in Henan[J].China Mining Magazine,2013,22(4):118-126.
[12]许亚坤,秦仁赞,苗书雷.河南胡襄煤田二1煤层地质特征及煤层气开发潜力分析[J].中国煤田地质,2015,27(10):24-28.Xu Yakun,Qin Renzan,Miao Shulei.CoalⅡ1geological features and CBM exploitation potential analysis in Huxiang Coalfield,Henan[J].Coal Geology of China,2015,27(10):24-28.
[13]李希建,林柏泉.煤与瓦斯突出机理研究现状及分析[J].煤田地质与勘探,2010,38(1):7-13.Li Xijian,Lin Baiquan.Status of research and analysis on coal and gas outburst mechanism[J].Coal Geology&Exploration,2010,38(1):7-13.
[14]张连强,袁关涛,逯振芳.地质特征对煤层瓦斯赋存的影响分析[J].中州煤炭,2016(3):133-137.Zhang Lianqiang,Yuan Guantao,Lu Zhenfang.Analysis on influencing of geological characteristics on occurrence of coal seam[J].Zhongzhou Coal,2016(3):133-137.
[15]牛永斌,朱信生,胡斌.河南省二叠系山西组煤与煤层气富集规律及其主控因素[J].中国煤层气,2015,12(1):7-13.Niu Yongbin,Zhu Xinsheng,Hu Bin.Accumulating discipline and main control factors of coal and CBM in Shanxi Formation of the fermian series in Henan Province[J].China Coalbed Methane,2015,12(1):7-13.
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