摘要
单一突出煤层煤巷掘进普遍采用穿层钻孔条带预抽煤层区域防突措施。对厚煤层,条带区域防突措施经过效果检验后,在煤巷掘进时钻孔瓦斯涌出初速度仍然严重超限。分析其影响因素,确定穿层钻孔后透气性增大是超限原因,研究水力冲孔为降低局部突出预测参数的第二阶段防突措施;根据模拟和现场情况,确定冲孔水压和半径。
The regional against outburst technique in single coal road tunneling use by pre-drainging gas by penetration drainage boreholes in generally. Thought effective regional measures have been taken in coal roadway drivage,initial speed from borehole gas emission become larger than before. By the research on influencing factors in initial speed from borehole gas emission and actual situation,find the reason is permeability coefficent has increasesed. Considering this situation,proposed hydraulic flushing outburst prevention measures in second stages. Using RFPA software to simulation,determine the pressure and the effective radius of hydraulic flushing.
出处
《煤炭技术》
CAS
北大核心
2014年第11期100-102,共3页
Coal Technology
基金
国家科技重点专项课题(2011ZX05040-005)
关键词
防突技术
水力冲孔
数值模拟
outburst prevention technology
hydraulic flushing
numerical simulation
