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文章首先介绍了瓮安磷矿磨坊矿段在区域分布上为高坪背斜的一部分、指出了由于地形地貌和构造条件使该矿段形成了一个较为完整的水文地质单元.同样由于断裂构造的作用,磨坊矿段又分为水文地质边界条件不同的两个矿体。震旦系上统陡山沱组第四段为磷矿层,它的直接顶板灯影组为含水量中等的含水层,是矿坑充水的主要因素。磨坊河自南而北纵贯矿段,在自然条件下起到排泄地表迳流和浅层地下水的作用,自然条件一旦改变将成为矿坑充水的重要因素。 其次介绍了在一定水文地质条件和边界条件下矿坑涌水量的运算,其中着重谈到了涌水量预算的新方法,即S=f(Q)多项式扩大系数法的运用。说明了计算步骤,井以计算实例对几种计算涌水量的方法加以比较,指出了新方法的适用范围和存在的问题。
The article firstly introduces the part of Gaopan anticline in the regional distribution of the Weng’an phosphate mines, and points out that a more complete hydrogeologic unit has been formed due to the topography and tectonic conditions. As a result of the fault structure Role, the mill section is divided into hydrogeological boundary conditions of two different ore body. The fourth section of Upper Sinian Doushantuo Formation is a phosphate rock formation. Its direct rooflamp group is an aquifer with moderate water content and is the main factor for water filling in the pit. Mill River from south to north through the mining section, in natural conditions play the role of excretion of surface water and shallow groundwater, groundwater changes once the natural conditions will become an important factor in filling the pit. Secondly, the calculation of mine water inflow under certain hydrogeological conditions and boundary conditions is introduced. The emphasis is put on the new method of water inflow budget, that is, the application of S = f (Q) polynomial expansion coefficient method. The calculation steps are explained, and several examples are given to compare the calculation methods of water inflow, and the applicable scope and existing problems of the new method are pointed out.