摘要
为测定寺河煤矿局部防突措施中瓦斯钻孔有效排放半径的问题,采用COMSOL模拟和现场实测方法,研究瓦斯钻孔有效排放半径随排放时间和钻孔直径的变化规律,并确定寺河煤矿合理的工作面点预测法实施参数。结果表明,瓦斯钻孔有效排放半径与瓦斯排放时间、钻孔直径均为正相关,表现为幂指数函数关系;采用φ75 mm钻孔、8 h排放时间可较为准确测定寺河矿东井区3号煤层钻孔有效排放半径,数值为1.5 m。研究结果可为矿井作业中治理煤与瓦斯局部突出提供重要参考。
In order to determine the effective discharge radius of gas drilling in the local outburst prevention measures of Sihe Coal Mine,COMSOL simulation and field measurement methods were used to study the variation law of effective discharge radius of gas drilling with discharge time and drilling diameter,and the reasonable working surface point prediction method of Sihe Coal Mine was determined.The results show that the effective discharge radius of gas borehole is positively correlated with gas discharge time and borehole diameter,which is expressed as a power exponential function.The effective discharge radius of No.3 coal seam in the east well area of Sihe Coal Mine can be accurately determined by usingΦ75 mm borehole and 8 h discharge time,and the value is 1.5 m.The research results can provide an important reference for the treatment of local coal and gas outburst in mine operation.
作者
马向兵
Ma Xiangbing(Sihe Coal Mine,Jinneng Holdings Equipment Manufacturing Group Co.,Ltd.,Jincheng 048000,China)
出处
《煤炭与化工》
CAS
2024年第9期90-95,共6页
Coal and Chemical Industry
关键词
有效排放半径
钻屑量
钻屑瓦斯解吸
数值模拟
影响规律
effective emission radius
the amount of drilling cuttings
drilling cuttings gas desorption
numerical simulation
influence law
