【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。更多还原

【Abstract】 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.更多还原