滨海深部开采矿山水文地质环境调查与渗流场特征分析

摘要

山东黄金矿业（莱州）有限公司三山岛金矿位于山东省莱州湾滨海地带，特殊地理位置使矿山采掘工程面临更为复杂的水文地质条件，大规模深部滨海开采存在涌、突水的安全隐患。在此背景下，考虑区域内发育断裂带的影响，对矿山的水文地质特征进行区域划分与评价；在矿区深部3个水平中段进行了节理裂隙现场调查，统计分析了上盘、矿体、下盘岩体的节理裂隙分布规律；基于裂隙几何参数量测与Monte-Carlo结构面随机模拟方法，计算并修正了深部工程岩体的渗透系数；借助FLAC3D数值计算手段，对矿区未来深部开采过程中渗流场的演化规律及影响范围进行了预测。研究对于保障复杂水文地质条件矿山深部开采活动的安全进行具有一定的指导与借鉴意义。%Sanshandao gold mine is located in coastal zone of Lai-Zhou Bay of Shandong Province.It is one of the main mines of Shandong(Laizhou)Gold Group Co.,Ltd.Owing to its special geographical location and complex hydrogeological conditions,large-scale mining engineering is confronted with water-bursting hidden danger.Based on this background,hydrogeological characteristics of the gold mine is regionally divided and evaluated through consideration of fault influence.Joint fracture survey work for 3 levels,where located in deep position of mine area, is implemented.In addition,joints distribution laws of hanging wall,orebody and footwall are studied.Permeability coefficient of deep rock is calculated and reasonably modified on basis of geometry parameters measurement and Monte-Carlo method.With the help of FLAC3D numerical calculation means,evolution characteristics and influence scope of seepage field during future deep mining process are forecasted.Achieved results can provide certain guiding significance to safety ensuring projects of deep exploitation mine under complex hydrogeological conditions.