摘要
针对新集二矿1煤层瓦斯地质条件,在220112工作面底板巷分别采用不同的钻孔有效抽采半径考察方法对1煤层抽采半径进行考察。研究结果表明:采用压降法考察期间数据变化幅度较大,考察结果与采用其他方法考察结果差距较大;采用理论计算法、含量法、流量法的考察数据稳定,考察结果基本一致。认为在考察钻孔有效抽采半径时,可选用2种以上考察方法进行考察,选取不同考察结果的最小值作为最终的有效抽采半径;研究结果可为新集二矿1煤层瓦斯抽采设计提供依据。
According to gas geological conditions of No. 1 coal seam in Xinji No. 2 Mine,the drilling drainage radius of the No. 1 coal seam was investigated using different effective drainage radius methods in the floor roadway of 220112 stope.The results show that the variation of the data during the period of observation with the method of pressure drop is large,and the results of the study are quite different from those of other methods; the theoretical calculation method,content method and flow method are stable whose results are basically the same. It is considered that more than 2 inspection methods can be used to study the effective drainage radius of borehole,and the minimum value of different inspection results should be taken as the final effective drainage radius; the research results can provide design basis for No. 1 coal seam gas drainage.
作者
徐遵玉
XU Zun-yu(China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, Chnia;State Key Laboratory of Gas Disaster Monitoring and Emergency Technology, Chongqing 400037, China)
出处
《煤炭工程》
北大核心
2018年第2期19-22,共4页
Coal Engineering
基金
国家重点研发计划项目(2017YFC0804206
2017YFC0804208)
国家自然科学基金资助(51604298)
关键词
有效抽采半径
压降法
含量法
流量法
瓦斯流动
Effective drainage radius
pressure drop method
content method
discharge method
gas flow
