煤田地质与勘探2025，Vol.53Issue(5)：142-149,8.DOI:10.12363/issn.1001-1986.24.11.0737
深立井筒水害定向钻孔泄水模型构建及应用
Construction and application of a model for drainage via directional boreholes against water hazards in deep vertical shafts
摘要
Abstract
[Background]Vertical shafts are typically employed in the deep mining areas of Jurassic coalfields in west-ern China.However,the direct exposure of extremely thick Cretaceous aquifers frequently leads to significant water in-flow in shafts.Meanwhile,the continuous sand-carrying water inflow and scouring in vertical shafts pose serious safety hazards to the overall quality of shaft walls.[Methods]In underground water exploration and discharge boreholes,wa-ter outlets are below the floors of aquifers to be drained.This allows unpowered water discharge.In other words,water can flow out naturally.By fully leveraging this advantage,combined with the favorable condition of spatial trajectory control during surface directional drilling,this study investigated the deep vertical shafts in a production mine in the Bin-chang mining area of the Huanglong coal base within a Jurassic coalfield in western China.Accordingly,this study pro-posed a nondestructive technical approach to controlling water in extremely thick sandstones in deep vertical shafts based on advance drainage through directional drilling.Using the COMSOL Multiphysics finite element numerical sim-ulation platform,this study conducted numerical processing of Darcy seepage overflow boundaries and permeable layer boundaries to address the challenge that the structures and natural drainage processes of directional boreholes cannot be scientifically described using the passive pumping model of surface vertical wells.Accordingly,this study established a numerical simulation model of the groundwater system integrating deep-seated,thick,water-rich sandstone aquifers,sur-face directional boreholes for advance drainage,and deep vertical shafts.Using this model,this study quantitatively ex-plored the changes in water inrush and water reduction effects in vertical shafts under the condition of advance regional drainage via surface directional boreholes.[Results and Conclusions]The simulation results of water inrush in the shafts studied indicate that the water inflow in drainage boreholes ZX1‒ZX4 was 34 m3/h,27 m3/h,38 m3/h,and 42 m3/h,respectively,as determined by the numerical processing of the four drainage boreholes and the integral of groundwater flow velocity around borehole and shaft walls.Meanwhile,the water inflow of the main and auxiliary ver-tical shafts decreased from 21.5 m3/h and 22 m3/h to 5.82 m3/h and 4.43 m3/h,respectively.Therefore,water reduction in the vertical shafts studied can be achieved by advance drainage via four surface directional boreholes,with the water re-duction effect satisfying the safety and quality requirements for shafts.The results of this study will provide a reference for the scientific management,analysis,and calculation against water hazards in shafts in deep mines within Jurassic coalfields in western China.关键词
巨厚砂岩/井筒涌水/定向钻孔/泄水模型/疏水降压Key words
extremely thick sandstone/water inrush in shaft/directional drilling/drainage model/dewatering and de-pressurization分类
矿业与冶金引用本文复制引用
赵春虎,樊敏,李凯,朱明诚,姬亚东,王世东,张文忠,朱开鹏,刘英锋,尚宏波,李超峰..深立井筒水害定向钻孔泄水模型构建及应用[J].煤田地质与勘探,2025,53(5):142-149,8.基金项目
国家自然科学基金面上项目(52474278) （52474278）
国家重点研发计划项目(2023YFC3012105) （2023YFC3012105）
陕西省创新能力支撑计划项目(2024RS-CXTD-44) （2024RS-CXTD-44）
中国煤炭科工集团科技创新重点项目(2024-TD-ZD009) （2024-TD-ZD009）
中煤科工西安研究院(集团)有限公司科技创新基金项目(2023XAYJS13,2021XAYKF02) （集团）
