截割厚度和截线距对镐型截齿破岩的影响研究  

Effects of cut depth and cut spacing on a conical pick in rock cutting

作　　者：廖九波[1] 李夕兵[1] 王少锋[1] 杜坤[1] LIAO Jiu-bo;LI Xi-bing;WANG Shao-feng;DU Kun(School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410083,China)

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《岩土力学》2023年第4期1009-1021,共13页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.52174099)。

摘　　要：为了研究不同截割厚度和截线距对镐型截齿截割力和截割比能耗的影响,基于TRW-3000真三轴电液伺服测试系统及自主设计的创新型截齿加载平台,对炭质板岩和流纹质碎屑岩试样进行了室内直线截割试验。试验结果表明:截齿破岩呈现4种破坏模式,两相邻截齿之间存在显著的协同作用。平均截割力随截割厚度和截线距的增大呈线性增大。随着截割厚度的增大,截割比能耗呈幂函数减小;随着截线距和截割厚度的比值的增大,截割比能耗先减小后增大,且存在一个最小比能耗,即最优值,最优截割比能耗远小于无截槽影响的比能耗,此时截线距和截割厚度的比值为2或3。利用室内试验结论优化了悬臂式掘进机截割头上的截齿布置,并运用到掘进机非爆掘进现场工业试验,大幅提高了掘进效率并降低了掘进成本。In order to study the effects of different cut depths and cut spacings on cutting force and specific cutting energy acting on a conical pick, the laboratory linear rock cutting tests were carried out on carbonaceous slate and rhyolite clastic rock based on the TRW-300 true triaxial electro-hydraulic servo system and self-designed innovative pick loading platform. Experimental results indicate that there were four types of failure modes on a conical pick in rock cutting, and there was a synergistic effect between two adjacent picks. The mean cutting force linearly increases with the increasing cut depth and cut spacing. The specific cutting energy decreases with the increasing cut depth in a power-function way. The specific cutting energy decreases first and then increases with the increasing ratio of cut spacing to cut depth, and there is a minimum value that is optimal, where it is far less than energy under an unrelieved cutting groove. The optimum value of the ratio of cut spacing to cut depth is 2 or 3. Based on the results of laboratory tests,the pick arrangement on the cutting head of the cantilever roadheader is optimized, and applied to the field industrial test of non-explosive tunneling of roadheader, which significantly increases tunneling efficiency and reduces tunneling costs.

关 键 词：镐型截齿 岩石截割 截割厚度 截线距 截割比能耗 

分 类 号：TD80[矿业工程—矿山开采]