基于工作面点预测法的钻孔有效排放半径测定研究  

Study on the determination of effective discharge radius of borehole based on working surface point prediction method

作　　者：马向兵 Ma Xiangbing(Sihe Coal Mine,Jinneng Holdings Equipment Manufacturing Group Co.,Ltd.,Jincheng 048000,China)

机构地区：[1]晋能控股装备制造集团有限公司寺河煤矿,山西晋城048000

出　　处：《煤炭与化工》2024年第9期90-95,共6页Coal and Chemical Industry

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.

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 

分 类 号：TD712[矿业工程—矿井通风与安全]