基于数值模拟的松散层下采煤水砂突涌预测研究  

Prediction of Water-sand Inrush in Coal Mining under Loose Layer based on Numerical Simulation

作　　者：汪鑫 王伟中 饶传 翟封 WANG xin;WANG weizhong;RAO chuan;ZHAI feng(CCTEG Chong′qing Research Institute,Chong′qing400039,China;Xinjiang Key Laboratory of Geological Hazard Prevention(Xinjiang Institute of Engineering),Urumqi830000,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400039 [2]新疆地质灾害防治重点实验室(新疆工程学院),乌鲁木齐830000

出　　处：《煤矿现代化》2023年第6期39-42,47,共5页Coal Mine Modernization

摘　　要：随着煤炭智能化的进程加快,如何提高开采上限,同时保证浅部压煤资源能够安全开采,成为目前煤炭领域关注的问题之一。为了准确预测松散含水层下工作面回采过程中是否发生水砂突涌现象,通过对矿区水文地质条件进行概化研究,结合FLAC3D和Visual-ModFlow数值模拟软件建立地质模型,预测回采期间实际水力坡度变化情况。结果表明工作面回采期间,松散含水层水力坡度呈现不断增大的趋势,最大值为0.8,仍小于临界水力坡度1.28,说明工作面回采不易溃砂。With the acceleration of the process of coal intelligence,how to increase the upper limit of mining while ensuring the safe mining of shallow coal resources has become one of the concerns in the coal field.In order to accurately predict whether water and sand inundation occurs during the mining process of the working face under loose aquifer,the hydrogeological conditions of the mining area are generalized,and the FLAC3D and Visual ModFlow numerical simulation software is used to establish a geological model to predict the actual hydraulic slope changes during mining.The results show that during the mining period of the coal face,the hydraulic gradient of the loose aquifer shows an increasing trend,and the maximum value is 0.8,which is still less than the critical hydraulic gradient of 1.28,indicating that the mining face is not easy to quicksand.

关 键 词：溃砂 松散层 水力坡度 数值模拟 MODFLOW 

分 类 号：TD74[矿业工程—矿井通风与安全]