摘要
通过试验研究了锚杆钻头在砂岩中钻进时的声压级、位移曲线、纵向振动和岩屑尺寸的响应特性。试验结果表明:在高强度砂岩中钻进时,声压级和纵向振动较大,与岩屑颗粒和钻速成反比;磨损钻头在砂岩中钻削时,钻进效率的降低更为明显;因此,通过优化钻头结构,使破碎的岩块尽早流出锚固孔,避免岩屑堆积堵塞钻孔,从而提高钻进效率。
The response characteristics of sound pressure level,displacement curve,longitudinal vibration and cuttings size of anchor bit during drilling in sandstone are studied by experiments.The experimental results showed that the sound pressure level and longitudinal vibration are larger during drilling in high strength sandstone,which is inversely proportional to cuttings grain and drilling speed.The decrease of drilling efficiency is more obvious when the abrasion bit is drilling in sandstone.Therefore,by optimizing the bit structure,the broken rock blocks can flow out of the anchorage hole as early as possible to avoid the accumulation of rock debris blocking the borehole and improve drilling efficiency.
作者
史文豹
周伟
李振福
彭行球
SHI Wenbao;ZHOU Wei;LI Zhenfu;PENG Xingqiu(School of Energy and Safety,Anhui University of Science and Technology,Huainan 232001,China;Key Laboratory of Safe and Efficient Mining of Coal Mine,Ministry of Education,Huainan 232001,China;Ping’an Coal Mining Engineering Technology Research Institute Co.,Ltd.,Huainan 232001,China;Sihe Mine,Shanxi Jincheng Anthracite Mining Group Co.,Ltd.,Jincheng 048000,China)
出处
《煤矿安全》
CAS
北大核心
2021年第4期85-88,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51874006,51774009)
安徽省自然科学基金资助项目(1808085 ME134)。
关键词
锚杆钻头
砂岩
钻进效率
声发射
钻屑量
bolt bit
sandstone
drilling efficiency
acoustic emission
amount of drilling cuttings
