赵各庄矿水文地质分区及涌水特征分析

Analysis on Hydrological Subregion and Mine Water Inrush Features of Zhaogezhuang Mine

通过对赵各庄矿历年开采中涌水状况及其分布、涌水与地质构造、采动效应等的关系研究,提出了赵各庄矿涌水具有分区特点:山前区(带)以奥灰水及地表水渗漏、逆掩导致顶板破裂、断层切割贯通底板砂岩含水层和采空区及塌陷坑积水引发异常涌水为主;在埋藏深度更大,地层产状变缓的井口区附近至南部开平向斜轴展布处区域内,则具潜在严重涌水风险的区域为特征。由此,将赵各庄矿划分为2个水文地质区:山前水文地质区(Ⅰ)与平原水文地质区(Ⅱ),并进一步细划为5个亚区,提出了开采深度达1200m以深为主的Ⅱ3亚区,判定断层切穿奥灰和突水系数大于0.1MPa/m的区域的能否实现安全开采,是该矿亟待解决的问题。

With the relationship study on the mine water inrush status and distribution,the water inrush and geological structure,mining effect and others occurred in the annual mining of Zhaogezhuang Mine,the mine water inrush in Zhaogezhuang Mine had subregion features.The abnormal mine water inrush were mainly occurred by the Ordovician limestone water and piedmont surface water leakage,the water bearing layer of the floor sandstone connected with the overthrust roof broken and the fault cut,the goaf and the subsidence pit.In the deep deposition depth,the strata formation steadily mine shaft mouth area to horizontal synclinal axle layout area in the south part,there were potential serious water inrush dangerous area as the features.Thus the Zhaogezhuang Mine could be divided into two hydrological zones and they were the piedmont hydrological zone（Ⅰ） and the plain hydrological zone（Ⅱ）,which could be further divided into 5 subareas.The paper proposed that the Ⅱ3 subarea would be mainly at the mining depth of 1 200 m.Therefore,it is necessary to determine the area with fault cut though Ordovician limestone and the water inrush coefficient over 0.1 MPa/m could be realized a safety mining whether or not.