摘要
为提高李粮店煤矿北风井西四采区回风平巷掘进中的钻眼成孔速度,采用理论分析、矿物成分测试以及现场钻眼试验3种方法对快速钻眼成孔进行了研究。结果表明:石英和钠长石含量之和占该巷岩石中矿物总量的60%以上,中硬岩石对钻头的磨损大;采用一字形钎头钻眼速度较快,成孔质量好;在施工2.5 m深的炮眼时,可先选用2.5 m长钎杆进行施工,当钻深至2.3 m左右时,更换3.0 m长钎杆继续钻进,可实现快速钻孔,单眼成孔时间由14 min减少到8 min,提高了钻眼成孔速度。
In order to improve the drilling completed speed during the heading of the air returning roadway in the west No. 4 mining block of North Mine ventilation shaft in Liliangdian Mine, a theoretical analysis, mineral composition measurement and site drilling test methods were applied to the study on the rapid borehole drilling completed. The results showed that the sum of quartz and sodium feldspars was taken over 60% of the total amount of minerals in the rock, the rock hardness was medium and the wear of the drilling bits was high. When a bull bit was applied, the borehole drilling speed would fast and the borehole completed quality would be good. During the drilling opera- tion of the 2. 5 m depth blasting borehole, the 2. 5 m long drilling rod could be selected for the drilling operation. When the drilling depth reached at about 2. 3 m, the 3.0 m long drilling rod shall be applied to the continued drilling and a fast borehole drilling could be realized. The completed time of a single borehole drilling could be reduced from 14 rain to 8 rain and thus the borehole completed speed could be improved.
出处
《煤炭科学技术》
CAS
北大核心
2012年第11期32-34,共3页
Coal Science and Technology
基金
国家自然科学基金煤炭联合基金重点资助项目(51134025)
中央高校基本科研业务费资助项目(2011QL06)
关键词
中硬岩石
快速钻眼
钎头型式
钻杆长度
矿物成分
巷道掘进
medium hard rock
rapid drilling
type of bit
length of drill rod
composition of mineral
road driving
