Water control principle of lateral water cutoff curtain and numerical analysis of its water interception effect in Yuanbaoshan open-pit coal mine-Taking Yuanbaoshan Open-pit Coal Mine as an example
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摘要:
露天煤矿开采过程中的矿坑疏排水是引起地下水资源流失的重要原因，寻求新的控水方法势在必行。以内蒙古赤峰市元宝山露天煤矿为研究对象，根据研究区水文地质与露天煤矿开发特征，分析了露天开采驱动下帷幕墙体建设对地下水系统控制的基本原理，得出帷幕墙体渗透能力越弱、厚度越大、与补给水体距离越近是帷幕墙减少露天采坑涌水的基本思路。将露天采矿疏排水与地下水系统数值仿真研究结合，对露天煤矿开采与帷幕墙建设对矿坑疏排水强度影响程度进行预测分析，模拟结果显示，采用针对主要涌水段的局部帷幕工程方案，地下水仍然以露天矿采坑为降落漏斗中心，区域流场形态基本未发生重大变化，在未帷幕区段地下水发生了强烈的侧向绕流现象，初期(300 d)矿坑残余涌水量较之现有矿坑排水量最大减幅 37.16%，而残余涌水量随时间增大趋势明显。按准全封闭型帷幕方案建墙后，地下水基本未发生绕流现象，矿井残余涌水量为先减小后增大的趋势，最大减幅达85.79%，且后期涌水量增加幅度不大，可见准封闭型帷幕建设方案较之局部帷幕方案对矿坑整体涌水量的减排作用显著。通过分析露天煤矿开采侧向帷幕控水规律，构建帷幕阻水条件下地下水系统仿真模型，评价帷幕截水减排效果，以期为露天矿区煤–水资源协调开发提供科学依据。
Abstract:In the process of open-pit coal mining, drainage is an important aspect causing the loss of groundwater resources. Taking Yuanbaoshan open-pit coal mine in Chifeng City, Inner Mongolia as the research object, this paper analyzes the control principle of the curtain wall construction driven by open-pit mining on the groundwater system according to the hydrogeology of the study area and the characteristics of open-pit coal mine development. It comes to the conclusion that the weaker the permeability of the curtain wall, the greater the thickness, and shortening the distance from the recharge water body is the basic idea of reducing water inflow in open-pit mining. The numerical simulation research of open-pit mining drainage and groundwater system are combined to predict and analyze the influence of open-pit coal mining and curtain wall construction on the drainage intensity of the pit. The simulation results show that for the local curtain scheme of the main water inflow section, the open-pit pit is still taken as the center of the falling funnel, and the regional flow field has not changed significantly. In the section without a curtain, a strong lateral flow phenomenon occurs in the groundwater. The residual water inflow of the mine in the initial stage (300 d) reduces at most 37.16% compared with the drainage of the current mine, and the residual water inflow increases obviously with time. After the construction of the wall in the quasi fully closed curtain scheme, the roundabout flow phenomenon hardly occurs in the groundwater. The residual water inflow of the mine tends to decrease first and then increase with the maximum reduction of 85.79%, and the increase of water inflow in the later stage is not significant. It can be seen that the quasi closed curtain construction scheme has a significant effect on reducing the overall water inflow of the mine compared with the local curtain scheme. By analyzing the water control law of lateral curtain in open-pit coal mining, a simulation model of the groundwater system under the condition of water blocked by the curtain is constructed, and the effect of discharge reduction by the water interception curtain is evaluated, providing a scientific basis for the coordinated development of coal-water resources in open-pit mining areas.
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图 2 露天煤矿开采致含水层地下水流失
Fig. 2 Sketch of the groundwater loss from the aquifers under open-pit coal mining
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图 3 露天煤矿帷幕条件下地下水流场
Fig. 3 Groundwater flow field with water cutoff curtain in the open-pit coal mine
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图 6 元宝山露天煤矿帷幕墙方案及位置
Fig. 6 Scheme and location of the water cutoff curtain wall in Yuanbaoshan open-pit coal mine
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图 7 局部帷幕工程后水位与水量变化规律
Fig. 7 Variation law of water level and water volume after partial project of the water cutoff curtain
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[1] 顾大钊, 李井峰, 曹志国, 等. 我国煤矿矿井水保护利用发展战略与工程科技[J]. 煤炭学报, 2021, 46(10) 3079–3089. GU Dazhao, LI Jingfeng, CAO Zhiguo, et al. Technology and engineering development strategy of water protection and utilization of coal mine in China[J]. Journal of China Coal Society, 2021, 46(10): 3079–3089.
[2] 武强, 赵苏启, 孙文洁, 等. 中国煤矿水文地质类型划分与特征分析[J]. 煤炭学报, 2013, 38(6): 901–905. WU Qiang, ZHAO Suqi, SUN Wenjie, et al. Classification of the hydrogeological type of coal mine and analysis of its characteristics in China[J]. Journal of China Coal Society, 2013, 38(6): 901–905.
[3] 冯海波. 内蒙古呼伦贝尔草原露天煤矿区地下水系统演化研究[D]. 呼和浩特: 内蒙古大学, 2017. FENG Haibo. Evolution of groundwater system in Hulunbuir grassland open–pit coal mine area of Inner Mongolia[D]. Huhhot: Inner Mongolia University, 2017.
[4] 马永茂, 鞠兴军. 呼伦贝尔市矿山地质环境问题及防治措施[J]. 露天采矿技术, 2012(1): 85–88. DOI: 10.3969/j.issn.1671-9816.2012.01.030 MA Yongmao, JU Xingjun. Mine geological environment problems and prevention measures in Hulunbuir[J]. Opencast Mining Technology, 2012(1): 85–88. DOI: 10.3969/j.issn.1671-9816.2012.01.030
[5] 王海, 彭巍, 曹海东, 等. 露天煤矿截水帷幕效果检验方法及截水效果分析[J]. 煤田地质与勘探, 2020, 48(4): 87–93. DOI: 10.3969/j.issn.1001-1986.2020.04.013 WANG Hai, PENG Wei, CAO Haidong, et al. Inspection method and analysis of the effect of water cutoff curtain in open–pit coal mine[J]. Coal Geology & Exploration, 2020, 48(4): 87–93. DOI: 10.3969/j.issn.1001-1986.2020.04.013
[6] 王双明, 黄庆享, 范立民, 等. 生态脆弱矿区含(隔)水层特征及保水开采分区研究[J]. 煤炭学报, 2010, 35(1): 7–14. WANG Shuangming, HUANG Qingxiang, FAN Limin, et al. Study on overburden aquclude and water protection mining regionazation in the ecological fragile mining area[J]. Journal of China Coal Society, 2010, 35(1): 7–14.
[7] HU Zhenqi,CHEN Chao,XIAO Wu,et al. Surface movement and deformation characteristics due to high–intensive coal mining in the windy and sandy region[J]. International Journal of Coal Science & Technology,2016,3(3):339−348.
[8] FAN Limin,MA Xiongde. A review on investigation of water–preserved coal mining in western China[J]. International Journal of Coal Science & Technology,2018,5(4):411−416.
[9] 范立民, 马雄德, 冀瑞君. 西部生态脆弱矿区保水采煤研究与实践进展[J]. 煤炭学报, 2015, 40(8): 1711–1717. FAN Limin, MA Xiongde, JI Ruijun. Progress in engineering practice of water–preserved coal mining in western eco–environment frangible area[J]. Journal of China Coal Society, 2015, 40(8): 1711–1717.
[10] LI Wenping,WANG Qiqing,LIU Shiliang,et al. Study on the creep permeability of mining–cracked N2 laterite as the key aquifuge for preserving water resources in northwestern China[J]. International Journal of Coal Science & Technology,2018,5(3):315−327.
[11] 范立民, 向茂西, 彭捷, 等. 西部生态脆弱矿区地下水对高强度采煤的响应[J]. 煤炭学报, 2016, 41(11): 2672–2678. FAN Limin, XIANG Maoxi, PENG Jie, et al. Groundwater response to intensive mining in ecologically fragile area[J]. Journal of China Coal Society, 2016, 41(11): 2672–2678.
[12] 董书宁, 杨志斌, 姬中奎, 等. 神府矿区大型水库旁烧变岩水保水开采技术研究[J]. 煤炭学报, 2019, 44(3): 709–717. DONG Shuning, YANG Zhibin, JI Zhongkui, et al. Study on water–preserved mining technology of burnt rock aquifer beside the large reservoir in Shenfu mining area[J]. Journal of China Coal Society, 2019, 44(3): 709–717.
[13] 尚宏波, 靳德武, 赵春虎, 等. 砾岩含水层帷幕浆液运移规律与改性效果分析[J]. 煤炭学报, 2019, 44(8): 2460–2469. SHANG Hongbo, JIN Dewu, ZHAO Chunhu, et al. Transport law of curtain grouting fluid in conglomerate aquifer and evaluation of rock mass modification effect[J]. Journal of China Coal Society, 2019, 44(8): 2460–2469.
[14] 张雁, 黄选明, 彭巍, 等. 截水帷幕在露天煤矿截渗减排中的应用[J]. 煤炭学报, 2020, 45(5): 1865–1873. ZHANG Yan, HUANG Xuanming, PENG Wei, et al. Application of water cutoff curtain in the seepage cutoff and drainage reduction of open–pit coal mine[J]. Journal of China Coal Society, 2020, 45(5): 1865–1873.
[15] 张雁, 黄选明, 靳德武. 基于截水帷幕的露天煤矿绿色开采实践[J]. 露天采矿技术, 2021, 36(2): 85–89. ZHANG Yan, HUANG Xuanming, JIN Dewu. Practice of green mining in open–pit coal mine based on water cutoff curtain[J]. Opencast Mining Technology, 2021, 36(2): 85–89.
[16] 曹海东, 苗贺朝, 迟赞, 等. 基于低强度抗渗混凝土的露天煤矿帷幕截水技术[J]. 煤田地质与勘探, 2020, 48(4): 61–67. DOI: 10.3969/j.issn.1001-1986.2020.04.009 CAO Haidong, MIAO Hechao, CHI Zan, et al. Water cutoff curtain technology of open–pit coal mine based on low strength impermeable concrete[J]. Coal Geology & Exploration, 2020, 48(4): 61–67. DOI: 10.3969/j.issn.1001-1986.2020.04.009
[17] 黄选明, 张雁, 李文嵩, 等. 我国露天煤矿水害特征与防治水技术[J]. 煤田地质与勘探, 2020, 48(4): 53–60. DOI: 10.3969/j.issn.1001-1986.2020.04.008 HUANG Xuanming, ZHANG Yan, LI Wensong, et al. Summary of water disaster characteristics and water prevention and control technology in open–pit coal mines in China[J]. Coal Geology & Exploration, 2020, 48(4): 53–60. DOI: 10.3969/j.issn.1001-1986.2020.04.008
[18] 赵春虎, 王强民, 王皓, 等. 东部草原区露天煤矿开采对地下水系统影响与帷幕保护分析[J]. 煤炭学报, 2019, 44(12): 3685–3692. ZHAO Chunhu, WANG Qiangmin, WANG Hao, et al. Analysis of influence of open–pit coal mining on groundwater system and curtain wall protection in grassland area of northeastern China[J]. Journal of China Coal Society, 2019, 44(12): 3685–3692.
[19] 赵春虎, 虎维岳, 靳德武. 西部干旱矿区采煤引起潜水损失量的定量评价方法[J]. 煤炭学报, 2017, 42(1): 169–174. ZHAO Chunhu, HU Weiyue, JIN Dewu. Method of quantitative evaluation on amount of groundwater loss from unconfined aquifer caused by mining disturbance in the arid area of western China[J]. Journal of China Coal Society, 2017, 42(1): 169–174.
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