煤矿开采导水裂隙带发育对潜水水位影响研究
发布时间：2019-05-17 15:22
【摘要】：为定量阐述采煤导水裂隙带发育对潜水含水层的影响,在分析采煤导水裂隙带发育形成机理的基础上,依据采煤导水裂隙带发育对潜水含水层的影响进行分类研究,按照对潜水水位影响的程度分为两类模式。基于这两种分类模式,以锦界矿区为研究对象,建立考虑导水裂隙带发育的地下水数值模拟模型,利用大量实测水位反演出导水裂隙带影响下各分区垂向渗透系数值变化序列,以此反映导水裂隙带发育对潜水含水层的影响。通过构建的地下水数值模型计算表明,在分类模式二条件下,由于导水裂隙带导通潜水关键隔水层构成垂向渗漏通道,隔水层垂向渗透系数显著增大,潜水水位形成大范围地下水降落漏斗。开采前10年最大降深值28 m,降深大于20 m的影响严重区域面积约为2.56 km~2,开采后20年,潜水位最大降深达到32 m。
[Abstract]:In order to quantitatively explain the influence of the development of coal mining water diversion fracture zone on the submersible aquifer, on the basis of analyzing the formation mechanism of the coal mining water diversion fracture zone, and according to the influence of the development of the coal mining water diversion fracture zone on the diving aquifer, this paper classifies and studies the influence of the development of the coal mining water diversion fracture zone on the submersible aquifer. According to the degree of influence on diving water level, there are two types of models. Based on these two classification models, taking Jinjie mining area as the research object, a numerical simulation model of groundwater considering the development of water diversion fracture zone is established, and the numerical variation sequence of vertical permeability coefficient under the influence of water conductivity fracture zone is deduced by using a large number of measured water levels. In order to reflect the influence of the development of water diversion fracture zone on submersible aquifers. The calculation of the numerical model of groundwater shows that under the condition of classification model two, the vertical permeability coefficient of the water insulation layer increases significantly due to the vertical leakage channel formed by the key water insulation layer of the diversion fracture zone. The diving water level forms a wide range of groundwater drop funnel. In the 10 years before mining, the maximum depth drop is 28 m, and the affected area with depth greater than 20 m is about 2.56 km~2, 20 years after mining, and the maximum depth of submersible water level reaches 32 m.
【作者单位】： 黄河水利科学研究院;
【基金】：黄河水利科学研究院基本科研业务费专项(HKY-JBYW-2016-40)
【分类号】：TD745
[Abstract]:In order to quantitatively explain the influence of the development of coal mining water diversion fracture zone on the submersible aquifer, on the basis of analyzing the formation mechanism of the coal mining water diversion fracture zone, and according to the influence of the development of the coal mining water diversion fracture zone on the diving aquifer, this paper classifies and studies the influence of the development of the coal mining water diversion fracture zone on the submersible aquifer. According to the degree of influence on diving water level, there are two types of models. Based on these two classification models, taking Jinjie mining area as the research object, a numerical simulation model of groundwater considering the development of water diversion fracture zone is established, and the numerical variation sequence of vertical permeability coefficient under the influence of water conductivity fracture zone is deduced by using a large number of measured water levels. In order to reflect the influence of the development of water diversion fracture zone on submersible aquifers. The calculation of the numerical model of groundwater shows that under the condition of classification model two, the vertical permeability coefficient of the water insulation layer increases significantly due to the vertical leakage channel formed by the key water insulation layer of the diversion fracture zone. The diving water level forms a wide range of groundwater drop funnel. In the 10 years before mining, the maximum depth drop is 28 m, and the affected area with depth greater than 20 m is about 2.56 km~2, 20 years after mining, and the maximum depth of submersible water level reaches 32 m.
【作者单位】： 黄河水利科学研究院;
【基金】：黄河水利科学研究院基本科研业务费专项(HKY-JBYW-2016-40)
【分类号】：TD745
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