Modflow中关键参数取值对矿井涌水量预测的影响研究  

Influence of key parameter values in Modflow on mine water inflow prediction

作　　者：胡兵 刘会月 李媛 侯丽丽 刘振宇 周全超 殷裁云 王冰山 耿华乐 HU Bing;LIU Huiyue;LI Yuan;HOU Lili;LIU Zhenyu;ZHOU Quanchao;YIN Caiyun;WANG Bingshan;GENG Huale(Huaneng Coal Technology Research Co.,Ltd.,Beijing 100070,China;College of Resource Environment and Tourism,Capital Normal University,Beijing 100048,China;General Prospecting Institute of China National Administration of Coal Geology,Beijing 100039,China)

机构地区：[1]华能煤炭技术研究有限公司,北京100070 [2]首都师范大学资源环境与旅游学院,北京100048 [3]中国煤炭地质总局勘查研究总院,北京100039

出　　处：《煤炭工程》2024年第10期247-253,共7页Coal Engineering

基　　金：华能集团总部科技项目“宁正矿区矿井水减排、资源化、回注一体化技术研究”(HNKJ20-H49)。

摘　　要：针对鄂尔多斯地区矿井开采过程中的涌水问题,以核桃峪井田为研究对象,对区域水文地质条件进行梳理,确定合理的概念模型和边界范围,建立了Visual Modflow数值模型,应用模型的排水沟边界模块,预测响应工作面采掘进度的矿井涌水量变化。并对排水沟水力传导系数C与含水层渗透系数K两个影响因子进行了不确定性分析,确定C的取值对工作面涌水量预测的影响更显著。根据临近的雅店井田两个工作面实际涌水量对C值进行反演,确定研究区域C值范围并代入核桃峪井田工作面预测中。结果表明:工作面涌水量预测值会随着C值取值增大而增大,当C取值约6.5×10^(-5)时,雅店井田工作面涌水量接近实际涌水量。基于该值计算出核桃峪井田各工作面矿井涌水量情况,待5个工作面回采结束后,矿井涌水量总量达到2697.2 m^(3)/h。In response to the problem of water inrush during mining in the Ordos region,Hetaoyu Coal Mine was taken as the research object,the regional hydrogeological conditions were sorted out,a reasonable conceptual model and boundary range was determined,and a Visual Modflow numerical model was established.The drainage ditch boundary module of the model was applied to predict the changes in mine water inflow in response to the mining progress of the working face.An uncertainty analysis was conducted on the drain module lumped conductivity C and hydraulic conductivity K of the drainage ditch,and it was determined that the value of C has a more significant impact on the prediction of water inflow in the working surface.Based on the actual water inflow of two adjacent working faces in Yadian Coal Mine,C value of the study area was inversed to determine the range and used in the prediction for Hetaoyu working face.The results show that the predicted water inflow of the working face will increase with the increase of the C value.When the C value is about 6.5×10^(-5),the water inflow of the Yadian working face is close to the actual water inflow.Based on this value,the water inflow of each working face in Hetaoyu Coal Mine was calculated,after the completion of the five working faces,the total water inflow of the mine was 2697.2 m^(3)/h.

关 键 词：涌水量预测 Visual Modflow 排水沟边界 含水层渗透系数 排水系数 

分 类 号：TD821[矿业工程—煤矿开采]