煤矿安全2012，Vol.43Issue(5)：8-11,4.
大孔径顺层长钻孔消突作用研究
Study on Removing Outburst Effect with Large Diameter Hole Along the Seam
余岩 1刘泽功 2王坤 3彭伟1
作者信息
- 1. 安徽理工大学能源与安全学院,安徽淮南232001
- 2. 安徽理工大学能源与安全学院,安徽淮南232001／煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001
- 3. 淮南矿业（集团）有限责任公司丁集煤矿,安徽淮南232001
- 折叠
摘要
Abstract
In order to recognize the removing outburst effect of the borehole pressure relief and gas drainage of large diameter hole along the seam in a microscopic view,numerical simulation was studied on 17171（1）working face in Pansan Coal mine by the RFPA2D-Flow code.According to the numerical simulation,if the hole diameter increased 2 times,the displacement of coal above the hole increased 8.4 times,and gas flow around the hole increased 1.37 times;when the hole spacing was 2 meters,the gas drainage was effective from the coal between the two holes,maximum permeability coefficient of coal increased 250 times.According to the fieldwork experimentation,after adopting the large diameter hole along the seam technology,the test results of removing outburst region in haulage gate and tail entry met regulatory requirements,and forecast the heading face outburst risk 55 times,no indicators overrun.It proves that in the condition of lacking protective seam,the large diameter hole along the seam has significant effect to remove outburst of seam.关键词
煤与瓦斯突出/大孔径顺层长钻孔/钻孔卸压/预抽煤层瓦斯/数值模拟Key words
coal and gas outburst/large diameter hole along the seam/borehole pressure relief/gas drainage from coal seam/numerical simulation分类
矿业与冶金引用本文复制引用
余岩,刘泽功,王坤,彭伟..大孔径顺层长钻孔消突作用研究[J].煤矿安全,2012,43(5):8-11,4.
