瓦斯抽采钻孔有效抽采半径的数值计算方法  

Numerical Calculation Method of Effective Drainage Radius For Gas Drainage Borehole

作　　者：王兆丰[1] 周少华[1] 李志强[1] 

机构地区：[1]河南理工大学,河南焦作45400

出　　处：《煤炭工程》2011年第6期82-84,共3页Coal Engineering

摘　　要：以重庆天府三矿为例,结合现场实测、实验室参数测定和理论计算,研究了不同布孔方式(顺层抽采钻孔、穿层抽采钻孔)的有效抽采半径,并提出了利用变系数非线性瓦斯渗流方程来快速精确测定瓦斯抽采半径的数值计算方法。结果表明,此方法能够方便、快速确定钻孔间距和抽采时间,对节省抽采半径的测定时间和合理布置钻孔有一定的实际意义。Taking the Chongqing Tainfu No. 3 Mine as an example, in combination with the site measurements, the lab measured and theoretical calculated coefficients, a study was conducted on the effective drainage radius of different borehole pattern （including the drainage borehole along the seam and the drainage boreho｜e passing strata）, and proposed that the varied coefficient and non - linear gas seepage formula would be applied to the numerical calculation method to rapidly and accurately measure the gas drainage radius. The results showed the method could be convenient and rapid to measure the borehole space and the gas drainage time and would have certain actual significances to save the measuring time of the gas drainage radius and to rationally set up the borehole layout.

关 键 词：瓦斯抽采 有效抽采半径 渗流 变系数非线性方程 

分 类 号：TD712.6[矿业工程—矿井通风与安全]