GMS在深井开挖地层的涌水量预测
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摘要
新城金矿主井开挖深度为1 521 m,竖井施工要经过裂隙发育地带,开挖涌水成为深井开挖施工的重点。为预测该深井开挖地层的涌水量,基于地下水模拟分析软件GMS,结合深井区域的钻孔信息、水文地质条件和抽水试验测得的模拟参数,在-326.40～-728.1 m深度范围建立5个连续solid地层模型,对solid模型进行三维网格划分,以modflow模块模拟5个地层区域的水头分布情况,进行深井开挖区域的涌水量预测;根据GMS模拟的涌水量数据,参照实际开挖过程中施工方测得的实际涌水量数值,对模拟的准确性进行验证;针对模拟结果分析周围地层的水头分布情况,提出了对于裂隙带水头较大的地层进行超前注浆止水的施工方案,减少裂隙带地层的涌水量,确保施工作业环境的安全。
The excavation depth of the main well of Xincheng Gold Mine is 1 521 m.The construction of the shaft should pass through the fissure development zone.The excavation of water is the focus of deep well excavation construction.Based on the groundwater simulation analysis software GMS,combined with the drilling information,hydrogeological conditions and pumping test parameters measured in the deep well area,five continuous solid formation models are established in the depth range of -326.40 m to -728.1 m,and the solid model is three-dimensional.Meshing,using the modflow module to simulate the head distribution of the five strata areas,and predicting the water inflow in the deep well excavation area;according to the GMS simulated water inflow data,refer to the actual influx quantity measured by the constructor during the actual excavation process.The accuracy of the simulation is verified.According to the simulation results,the distribution of the heads in the surrounding strata is analyzed.The construction scheme of advanced grouting and water stop for the stratum with large heads in the fracture zone is proposed to reduce the water inflow in the fracture zone and ensure the construction.The safety of the work environment.
The excavation depth of the main well of Xincheng Gold Mine is 1 521 m.The construction of the shaft should pass through the fissure development zone.The excavation of water is the focus of deep well excavation construction.Based on the groundwater simulation analysis software GMS,combined with the drilling information,hydrogeological conditions and pumping test parameters measured in the deep well area,five continuous solid formation models are established in the depth range of -326.40 m to -728.1 m,and the solid model is three-dimensional.Meshing,using the modflow module to simulate the head distribution of the five strata areas,and predicting the water inflow in the deep well excavation area;according to the GMS simulated water inflow data,refer to the actual influx quantity measured by the constructor during the actual excavation process.The accuracy of the simulation is verified.According to the simulation results,the distribution of the heads in the surrounding strata is analyzed.The construction scheme of advanced grouting and water stop for the stratum with large heads in the fracture zone is proposed to reduce the water inflow in the fracture zone and ensure the construction.The safety of the work environment.
引文
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[2] 刘天霸,张永波,费宇红,等.华北平原三维水文地质建模及其可视化研究[J].水科学与工程技术,2007(2):44-46.
[3] 王淼,陈晨,张丽岭.基于钻孔数据和GMS三维建模与可视化研究[J].工程建设与设计,2007(11):72-74.
[4] 薛禹群,朱学愚,吴吉春,等.地下水动力学[M].北京:地质出版社,2000.
[5] 贺国平,张彤,吴月芬,等.GMS数值建模方法研究综述[J].地下水,2007,29(3):32-35.
[6] 孙东哲,徐世光,吴静.GMS在矿井涌水量中的应用[J].价值工程,2017(7):7-8.
[7] 蔡美峰,乔兰,李长洪.新城金矿地应力场测量及其分布规律研究[J].金属矿山,2000(3):1-7.
[8] 范书凯,崔海明,周连碧.基于GMS的矿坑涌水量预测与环境影响评价[J].中国矿业,2015(10):178-181.
[9] 谭家华,雷宏武.基于GMS的三维TOUGH2模型及模拟[J].吉林大学学报(地球科学版),2017,47(4):1229-1235.
[10] 邓红卫,叶茂,吴彦霖.基于GMS和Slide的透镜体数值模拟和敏感性研究[J].安全与环境学报,2016(1):91-94.
[11] 张鲁渝,郑颖人,张建民.基于面向对象技术的几何建模及其在边坡稳定分析中的应用[J].岩土工程学报,2006(1):129-134.
[12] 刘健勤,刘其兴.一种矿井涌水量预测的新的进化计算算法[J].煤炭学报,1998(2):107-110.