四棵树矿区八号井瓦斯赋存规律及涌出量预测研究  

Research on occurrence law and prediction of gas emission in the No.8 well of Sikeshu mining area

作　　者：杨周 王正帅 Yang Zhou;Wang Zhengshuai(Wusu Sikeshu Coal Co.,Ltd.,Wusu 833300,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]乌苏四棵树煤炭有限责任公司,新疆乌苏833300 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《能源与环保》2024年第1期59-63,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：“十三五”国家科技重大专项资助项目(2016ZX05043-005)。

摘　　要：为了掌握四棵树矿区八号井B5煤层瓦斯赋存规律,预测未开采区域瓦斯涌出量,以指导矿井瓦斯灾害治理,测定了煤层原始瓦斯含量和瓦斯压力,分析了地质构造、顶底板岩性对瓦斯赋存的影响,划分了瓦斯地质单元,预测了各工作面瓦斯涌出量。研究结果表明,四棵树向斜轴距二采区较远,对二采区煤层瓦斯赋存与逸散影响有限,但对三采区瓦斯赋存影响较大,两翼和轴部中和面以上是瓦斯封存和聚集部位,向斜轴部是瓦斯含量、瓦斯压力高异常区。B5煤层为同一瓦斯地质单元,受顶底板岩性影响,瓦斯不易逸散。B5煤层瓦斯含量、瓦斯压力随埋深变化梯度分别为1.27 m^(3)/(t·hm)、0.15 MPa/hm, B5煤层工作面绝对瓦斯涌出量、相对瓦斯涌出量随埋深变化梯度分别为6.26 m^(3)/(min·hm)、1.78 m^(3)/(t·hm),瓦斯含量、瓦斯涌出量整体表现为由南向北逐渐升高的趋势。In order to master the gas occurrence law of B 5 coal seam in the No.8 well of Sikeshu mining area,and predict the gas emission amount in the unexploited area,to guide the mine gas disaster management,the original gas content and gas pressure were measured,the impact of tectonics and the rock properties of the roof and floor on the gas occurrence was analyzed,the gas geology unit was divided,and the gas emission amount of each working face was predicted.The results show that the Sikeshu synclinal axis is far from the second mining area,which has limited impact on the preservation and escape of gas,but has a significant impact on the occurrence of gas in the third mining area.The gas storage and accumulation areas are located above the neutral plane of the two wings and axis,while the synclinal axis is an abnormal area with high gas content and gas pressure.The B 5 coal seam belongs to the same gas geology unit,and is affected by the lithology of the roof and floor,making it difficult for gas to escape.The gradients of gas content and gas pressure of the B 5 coal seam with burial depth are 1.27 m 3/(t·hm)and 0.15 MPa/hm,respectively.The gradients of the absolute and relative gas emission gradients of the B 5 coal seam working face with burial depth are 6.26 m^(3)/(min·hm)and 1.78 m^(3)/(t·hm),respectively.The gas content and gas emission overall show a trend of gradually increasing from south to north.

关 键 词：瓦斯赋存规律 瓦斯地质单元 向斜轴 原始瓦斯压力 

分 类 号：TD712[矿业工程—矿井通风与安全]