为解决某复杂艰险山区在建铁路隧道施工弃渣二次倒运无运输通道的难题，提出一种长大溜槽运渣技术。通过现场试验及数值计算方法对溜槽运渣关键技术进行研究，结果表明： 1）石渣颗粒从溜槽滑出的速度随粒径的增大而增大，其在溜槽滑动的平均摩擦因数为0.16； 2）单个鱼刺状挡板受力，前、后24 m鱼刺状挡板所受合力及石渣颗粒速度均随着鱼刺状挡板间距、鱼刺状挡板角度及折形消能机构角度的增大而逐渐增大，但随着鱼刺状挡板宽度和折形消能机构长度的增大而逐渐减小。

A railway tunnel under construction in mountainous areas with complex geological conditions is confronted with the problem of no transportation channel for the secondary transfer of discarded slag. The technology of transfering slag with long and large chute is proposed and its key points are studied by field test and numerical calculation. The results show that: (1) The sliding velocity of slag particles increases with particle size, and the average friction coefficient is 0.16 when slag particles sliding in the chute. (2) The force of single fishbone baffle, the resultant force of fishbone baffle before and after 24 m, and the velocity of stone slag particles gradually increase with increasing fishbone baffle spacing, baffle angle, and the angle of folded energy dissipation structure,  while decrease with the increase of width of fishbone baffle and length of energy dissipation structure.