Influencing factors to extraction efficiency of surface goaf hole

被引：0
|
作者：
Li, Ri-Fu [1 ,2 ]
Liang, Yun-Pei [2 ]
Zhang, Jun [2 ]
机构：
[1] College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China
[2] Chongqing Research Institute, China Coal Research Institute, Chongqing 400037, China
来源：
Meitan Xuebao/Journal of the China Coal Society | 2009年 / 34卷 / 07期
关键词：
Extraction efficiencies - Gas extractions - Nature factor - Parameter factor - Research results - Space between - Surface boreholes - Working efficiency;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Based on the mechanism of gas extraction technology with surface goaf hole, analyzed field data about boreholes in Huainan Mining (Group) Co. Ltd. With the method of numerical simulation and theory conclusion, concluded the influencing factors to extraction efficiency of surface goaf hole. Besides, provided some advices on promoting the working efficiency of borehole in the end. Research results indicate that factors influencing the extraction efficiency of hole can be reduced to two types such like nature and parameter generally. Such measures like reducing air-leak in goaf, disposing hole near to return airway, controlling extracting pressure to range from 40 to 60 kPa and space between holes 200 to 300 m and so on are useful to promote the efficiency of surface borehole.
引用
收藏
页码：942 / 946
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