新疆乌东矿区八道湾向斜两翼瓦斯地质规律研究
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摘要
以煤矿钻孔煤样瓦斯数据及井下实测瓦斯含量为依据,分析了乌东矿区构造对瓦斯赋存的控制作用,认为区内以七道湾背斜、八道湾向斜和F2逆冲断层为主要构造形迹,并控制了煤层的赋存状态和瓦斯分布规律;八道湾向斜南翼地层倾角陡近乎直立,地层局部倒转,有利于瓦斯逸散,而北翼煤层倾角缓,且受到矿区南部碗窑沟逆冲断层(F2)挤压作用,断面形成瓦斯的"隔挡"面,阻断了瓦斯的逸散通道,造成向斜北翼瓦斯含量高于南翼;瓦斯含量与煤层埋深呈正相关关系。随着各矿向下延深开采,瓦斯涌出量将会逐渐加大。因此,掌握矿区的瓦斯地质规律,对其安全生产具有指导意义。
Based on coalmine borehole coal sample gas data and underground measured gas content,analyzed structural control of gas hosting in Urumqi eastern mining area.The result considered that main structural features in the area have Qidaowan anticline,Badaowan syncline and F2 thrust and they have controlled coal seam hosting pattern and gas distribution.Strata dip is steep and approximately stand erect,locally overturned in the south limb of Badaowan syncline,thus in favor of gas dissipation;while coal seam dip is gentle in the north limb,and compressed by Wanyaogou thrust(F2) in southern part of mining area,formed a gas "separator" and interdicted gas from dissipation,caused gas content is higher in north limb than in south limb;positive correlation is existed between gas contents and coal buried depth.Along with coalmine new levels development downwards,gas emission rate will increase gradually.Thus,to grasp gas geological regular pattern in the mining area has guiding significance in production safety.
Based on coalmine borehole coal sample gas data and underground measured gas content,analyzed structural control of gas hosting in Urumqi eastern mining area.The result considered that main structural features in the area have Qidaowan anticline,Badaowan syncline and F2 thrust and they have controlled coal seam hosting pattern and gas distribution.Strata dip is steep and approximately stand erect,locally overturned in the south limb of Badaowan syncline,thus in favor of gas dissipation;while coal seam dip is gentle in the north limb,and compressed by Wanyaogou thrust(F2) in southern part of mining area,formed a gas "separator" and interdicted gas from dissipation,caused gas content is higher in north limb than in south limb;positive correlation is existed between gas contents and coal buried depth.Along with coalmine new levels development downwards,gas emission rate will increase gradually.Thus,to grasp gas geological regular pattern in the mining area has guiding significance in production safety.
引文
[1]张子敏.瓦斯地质学[M].江苏徐州:中国矿业大学出版社,2009.
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[10]蔚远江,胡素云.准噶尔西北缘前陆冲断带三叠纪-侏罗纪逆冲断裂活动的沉积响应[J].地学前缘,2005,12(4):423-436.
[11]李瑞明.准南煤田乌鲁木齐河两岸矿区中构造对煤层气的控制作用[C]//天山地质矿产资源学术讨论会论文集.2005,6(383).
[12]张子敏,崔洪庆.神华新疆能源有限责任公司铁厂沟、大洪沟、小红沟瓦斯地质图编制研究报告[R].2010.
[2]邓起东,冯先岳.天山活动构造[M].北京:地震出版社,2000.
[3]赵白.准噶尔盆地的形成和演化[J].新疆石油地质,1992,13(2):191-196.
[4]曲国胜,马宗晋.论准噶尔盆地构造及其演化[J].新疆石油地质,2009,30(1):1-5.
[5]陈新,卢华复.准噶尔盆地构造演化分析新进展[J].高校地质学报,2002.3(8):262-263.
[6]顾连兴,胡爱奚.论博格达俯冲撕裂型裂谷的形成与演化[J].岩石学报,2001,17(4):585-594.
[7]于福生,李国志.准噶尔盆地南缘褶皱冲断带变形特征及成因机制模拟[J].大地构造与成矿学,2009,33(3):386-395.
[8]陈涛,魏东涛.准南前陆冲断带构造特征及其对油气成藏的影响[J].天然气地球科学,2006,17(4):711-718.
[9]邓起东,冯先岳.乌鲁木齐山前坳陷逆断裂褶皱带及其形成机制[J].地学前缘,1999.6(4):191-201.
[10]蔚远江,胡素云.准噶尔西北缘前陆冲断带三叠纪-侏罗纪逆冲断裂活动的沉积响应[J].地学前缘,2005,12(4):423-436.
[11]李瑞明.准南煤田乌鲁木齐河两岸矿区中构造对煤层气的控制作用[C]//天山地质矿产资源学术讨论会论文集.2005,6(383).
[12]张子敏,崔洪庆.神华新疆能源有限责任公司铁厂沟、大洪沟、小红沟瓦斯地质图编制研究报告[R].2010.
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