论文部分内容阅读
“4·20”芦山地震导致人工堆积矿渣更加破碎,位于震区的石棉县后沟属于典型的矿山泥石流易发区,其泥石流运动模式与所在流域的地形条件、水文条件、物源条件密切相关。由于人为泥石流和自然泥石流在运动模式上存在差异,因此本文从地形、水文、静动力及物源4个条件入手,以石棉县后沟为例,详细论述矿山泥石流的运动模式。研究结果表明,后沟泥石流的运动过程模式包含了初期降雨降低废弃矿渣稳定性、持续降雨侵蚀矿渣坡面、雨水汇集形成洪流起动沟道矿渣、高含矿渣洪流裹挟运移起动泥石流、沿途侵蚀矿渣加强了泥石流规模等5个方面。
“4.20” The Lushan earthquake caused more accumulation of artificially accumulated slag. The posterior ditch of Shimian County located in the earthquake zone belongs to the typical mine debris flow prone area. The debris flow movement pattern and the terrain, hydrological conditions, provenance conditions closely related. Because of the differences between the artificial debris flow and the natural debris flow in the movement patterns, this paper starts from the four conditions of topography, hydrology, hydrodynamics and provenance. Taking the Shimian back ditch as an example, this paper discusses the mining debris flow movement mode in detail. The results show that the kinetic process model of the rear gully debris flow includes initial rainfall to reduce the stability of the abandoned slag, continuous rainfall erosion of the slag slope surface, rainwater pooling to form the torrent starting channel slag, high slag flow to mobilize and initiate debris flow, Strengthen the scale of debris flow and other five aspects.