摘要
针对低透气性突出煤层钻孔工程量大、抽采时间长的难题,提出水力割缝自卸压处理突出煤层的新思路,对比考察了钻孔割缝前后钻孔瓦斯抽采浓度、抽采量的变化规律,通过区域措施效果检验进一步验证了水力割缝自卸压效果。结果表明:采用割缝自卸压增透技术后,达标时间由112 d缩短至72 d,工程量减少了32.7%。
The quantity of drilling holes is large,the time of gas extracting is long,in views of these problems,the new thought,to deal with outburst coal seam by hydraulic cutting and self-distressing,was proposed by using hydraulic cutting seam to improve coal seam permeability and enhance gas extraction. The concentration and amount of gas drained from drill were compared before and after cutting.Further researches were done by testing of regional measures. Results show that the required time can be shorten to 72 days comparing112 days ago and the drilling quantity reduces 32. 7% by using the technology of self-distressing with hydraulic cutting seam.
出处
《中州煤炭》
2015年第2期1-3,共3页
Zhongzhou Coal
基金
国家科技重大专项(20011ZX05065)
关键词
瓦斯
抽采
水力割缝
自卸压
煤层透气性
gas
drainage
hydraulic cutting seam
self-distressing
coal seam permeability
