矿山泥石流形成的理论动态分析——以神府东胜矿区为例

Theoretical dynamic analysis on forming mine debris flow ——Shenfu-Dongsheng Mine field as an exsample

在神府东胜矿区矿山泥石流沟道调查的基础上,系统分析了矿山泥石流形成的3个基本条件,得出结论如下:①固体物质来源充足。主要来源有:矿区建设中排放的大量弃土石渣,陡坡、临空面的崩塌堆积物,风化剥蚀形成的泻溜、坡积裙;②降雨和径流是泥石流暴发的主要外动力。经GM(1,1)包络线法预测,未来几年降雨量稳中有增;③地形比降是泥石流暴发的不可逆的趋动力。由于工程建设,沟道地形畸变,比降加大,暴发泥石流的沟道地形条件潜势很大。在泥石流形成的3要素基本满足的前提下,其暴发的关键还在于3要素的有机结合。根据泥石流固体物质含量指标,应用系统原理,讨论了潜在矿山泥石流形成3要素有机结合的随机动态过程。

Based on the extensive field investigation and collection data in ShenfuDonsheng mine region,the three main factors of forming debris flow are systematicall analyzed, and here comes to three conclusions:①The source of loose materials are full.There are a great lot of waste material discarded in the mine construction,accumulation materials piled from collapsing of steep slope,and slope wash formed by weathering and denudation,②Rainfall and runoff are main outside power of forming debris flow.According to GM(1,1)prediction,rainfall will not be less in further this area;③The gradient of gully bed is the irreversible dynamics of forming debris flow.As a result of mine region construction,the steep slope of topography is very distinct and the gradient of gully bed are increased.The potential dynamics of topography causing debris flow is very great.On the base of results,the key point of forming debris flow is also the combination of the three basic factors.According to volume indexes of loose materials,the developing processes of stochastic conjoining of three factors forming debris flow are discussed and the prediction equation are developed with theory of system principles.