深孔预裂爆破技术在低透气性回采工作面中的试验研究  

Experiment study on deep hole pre-splitting blasting technology in low permeability outburst working face

作　　者：姜二龙[1] 刘健[1,2] 蔡文鹏[1] 孙东生[1] 

机构地区：[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

出　　处：《中国安全生产科学技术》2013年第7期20-24,共5页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(51004003;50974004);安徽高校省级自然科学研究重点项目(KJ2010AO91)

摘　　要：为解决低透气性回采工作面采煤过程中,瓦斯抽采困难、施工周期长等问题,提出了利用深孔预裂爆破技术,增加煤层裂隙,提高煤层透气性的方法,并研究了深孔预裂爆破技术的作用机理,阐述了深孔预裂爆破技术的工艺流程,对增透效果进行了现场考察。研究表明:深孔预裂爆破后与爆破前相比,平均瓦斯抽采量提高了2.32倍,平均煤层透气性系数提高了5.6倍,最大提高了11.5倍,有效提高了瓦斯抽采率;工作面回采周期大幅度缩短,为安全、快速回采提供了保障。In order to solve the problems of gas drainage difficulties and long construction period in ow permeability outburst working face of mining process,it was proposed to adopt deep hole pre-splitting blasting technology to increase the coal seam fracture and seam permeability.The mechanism of deep hole pre-splitting blasting technology was studies,the process of deep hole pre-splitting blasting technology was described,and the effect of permeability increasing was tested in site.The results showed that： for the deep hole pre-splitting,blasting compared with before blasting,the average gas extraction volume increased by 2.32 times and the average seam permeability coefficient increased by 5.6 times,maximum 11.5 times,and it improved the gas pumping rate effectively.The stope cycle of working face shortened considerably,and it provides a guarantee for the safe and fast recovery.

关 键 词：低透气性煤层 深孔预裂爆破 增透 瓦斯抽采 

分 类 号：X936[环境科学与工程—安全科学]