网格化磨料射流割缝辅助截齿破岩试验研究  

Experimental Study of Rock Broken by Cutter Tooth with Auxiliary of Grid Abrasive Slurry Jet Slotting

作　　者：王凤超[1] 刘应科[2] 张利瑶 周鑫[1] 钮月 WANG Fengchao;LIU Yingke;ZHANG Liyao;ZHOU Xin;NIU Yue(School of Low Carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 221116,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory for Geomechanics and Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学低碳能源与动力工程学院,江苏徐州221116 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]中国矿业大学深部岩土力学与地下工程国家重点试验室,江苏徐州221116

出　　处：《煤炭技术》2024年第5期265-269,共5页Coal Technology

基　　金：国家自然科学基金项目(52104150,U21A20107);江苏省自然科学基金项目(BK20200657)。

摘　　要：针对煤矿岩巷掘进过程中截齿破岩能力不足、效率低、磨损快等问题,提出了网格化磨料射流割缝辅助截齿破岩方法,并进行了正交化物理模拟试验,研究了工况参数对破岩效果的影响。结果表明:(1)磨料射流对岩石预制割缝,能够显著提高截齿单位时间的破岩体积,且试验中网格尺寸和割缝深度取值越大,破岩效率越高。(2)当射流割缝辅助破岩时,截齿等效应力峰值和均值均显著降低,有效减少截齿磨损。(3)网格化磨料射流辅助截齿破岩参数的优选工况组合为:横向和纵向网格尺寸分别为44、30 mm,喷嘴进给速度为600 mm/min。研究成果为网格化磨料射流辅助机械截齿破岩技术推广应用提供了理论基础与数据支撑。In view of the problems such as insufficient rock breaking capacity,low efficiency and fast wear of the pick in the process of coal mine rock roadway excavation,a mesh abrasive jet slotting assisted rock breaking method of the pick was proposed,and orthogonalization physical simulation tests were carried out to study the influence of working condition parameters on the rock breaking effect.The results show that:(1)Abrasive jet can significantly increase the rock breaking volume per unit time of the cutting teeth by pre cutting the rock,and the larger the grid size and cutting depth values in the experiment,the higher the rock breaking efficiency.(2)When jet cutting is used to assist in rock breaking,the peak and average equivalent stress of the cutting teeth are significantly reduced,effectively reducing the wear of the cutting teeth.(3)The optimal combination of rock breaking parameters for grid abrasive jet assisted cutting is:the horizontal and vertical grid sizes are 44 mm and 30 mm respectively,and the nozzle feed speed is 600 mm/min.The research results provide a theoretical basis and data support for the promotion and application of grid abrasive jet assisted mechanical rock cutting technology.

关 键 词：岩巷掘进 射流割缝 磨料射流 截齿破岩 

分 类 号：TD421[矿业工程—矿山机电]