煤矿巷道底板锚固孔钻渣生成机理及尺寸特征分析  

Generation mechanism and size characteristics of the rock fragments during borehole drilling in coal mine roadway floor

作　　者：付孟雄 刘少伟[1,3,4] 贾后省 张伟光[4] FU Mengxiong;LIU Shaowei;JIA Housheng;ZHANG Weiguang(School of Energy Science and Kngineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China;Postdoctoral station of Safety Science and Engineering,Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources,Henan Polytechnic University,Jiaozuo,Henan 454000,China;The Safety of Coal Production Collaborative Innovation Center,Jiaozuo,Henan 454000,China;Department of Mining Engineering,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830091,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]河南理工大学安全科学与工程博士后流动站,河南省矿产资源绿色高效开采与综合利用重点实验室,河南焦作454000 [3]煤炭安全生产协同创新中心,河南焦作454000 [4]新疆工程学院采矿工程系,新疆乌鲁木齐830091

出　　处：《中国矿业大学学报》2021年第2期228-238,共11页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51674098,51604094);河南省高校创新人才项目(19HASTIT048);河南省高校基本科研业务费专项基金项目(NSFRF-170602);河南省矿产资源绿色高效开采与综合利用重点实验室开放基金项目(KCF202003)。

摘　　要：利用理论分析、实验室实验及数值模拟方法研究了底板锚固孔钻进过程中两翼式钻头破岩时钻渣生成机理及尺寸特征.结果表明:两翼式钻头破岩过程实际为底板锚固孔钻渣分区域生成的过程,即锚固孔周边岩石切削破碎生成小粒径钻渣以及中部区域岩柱扭转(受压)破坏生成大粒径钻渣;底板锚固孔钻进过程中岩石的单轴抗压强度越高,钻进过程中产生的大粒径钻渣比例越大,造成钻渣整体平均尺寸随岩石单轴抗压强度的增加而增加.在钻进至较坚硬地层时,由于大尺寸钻渣产出量增加,应及时调整排渣动力参数,防治堵钻或卡钻.Theoretical analysis,laboratory experiment and numerical simulation were adopted to analyze the generation mechanism and size characteristics of rock fragments formed by two-wring drill bit.The results indicate that rock cutting process of two-wring drill bit is the process of fragmentation in two parts of the borehole,including the rock breaking of the periphery area of the borehole to generate the fragments with small particle sizes and the failure of central rock pillar to generate the fragments with large particle sizes.The proportion of the fragments with large particle sizes increase with the uniaxial compressive strength,which making the mean fragments size increase with uniaxial compressive strength.When the drill rod drills through high strength rocks,the mean size of the fragments will increase and the discharge power should be increased to prevent fragment discharge blockages.

关 键 词：锚杆支护 底鼓控制 底板锚固孔 钻渣尺寸 

分 类 号：TD353[矿业工程—矿井建设]