Key technical progress of water cutoff curtain technology in open-pit coal mines in China

Authors

HUANG Xuanming, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China;Follow
ZHANG Yan, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China;Follow
WANG Mingxing, Inner Mongolia Pingzhuang Coal Industry (Group) Co., Ltd., Chifeng 024050, China
TENG Qingshan, Inner Mongolia Pingzhuang Coal Industry (Group) Co., Ltd., Chifeng 024050, China
LI Guozhi, Inner Mongolia Pingzhuang Coal Industry (Group) Co., Ltd., Chifeng 024050, China

Abstract

The method of pumping and discharging groundwater is widely used in open-pit coal mines for groundwater control in China to meet the requirements of safe coal mining, which causes great damage to water resources and seriously affects the ecological environment around coal mines. In recent years, with the all-round development of the economy, China has put forward higher requirements for ecological environment protection and ecological civilization construction. How to optimize and change the groundwater control mode and reduce the volume of pit drainage is a new subject generally in water prevention and control of open-pit coal mines. The use of the water cutoff curtain technology instead of drainage and dewatering technology is the fundamental measure to solve many problems caused by drainage in open-pit coal mines. Taking the implementation of the water cutoff curtain technology in Zhanihe open-pit coal mine and Yuanbaoshan open-pit coal mine as an example, this paper introduces the design concept, construction process and materials of the water cutoff curtain technology for open-pit coal mines in China. In the practice, the technical bottleneck of large-depth vertical concealed laying and complete connection of impervious membranes is broken through, and the continuous excavation and pouring technology of super long grooves is developed, greatly reducing the number of joints. The composite curtain material of fly ash-cement mixed slurry and HDPE geomembranes is developed to improve the impermeability and deformation resistance of the curtain. The comprehensive inspection system for curtain quality and water interception effect is constructed, and the key technologies of curtain construction are mastered. The successful application of water cutoff curtain technology in China enriches the technical theory of water control and water resource protection in open-pit coal mines, promotes the technical progress of the industry, and provides new ideas, new technologies and new processes for groundwater control and safe and green mining in open-pit coal mines. It has important reference significance for other non-coal mines, water conservancy, hydropower, transportation and other projects with higher anti-seepage grade requirements.

Keywords

open-pit coal mine, water cutoff curtain, key technology, impervious membrane, diaphragm wall|inspection system, progress

DOI

10.12363/issn.1001-1986.21.12.0766

Recommended Citation

HUANG Xuanming, ZHANG Yan, WANG Mingxing, et al. (2022) "Key technical progress of water cutoff curtain technology in open-pit coal mines in China," Coal Geology & Exploration: Vol. 50: Iss. 7, Article 2.
DOI: 10.12363/issn.1001-1986.21.12.0766
Available at: https://cge.researchcommons.org/journal/vol50/iss7/2

Reference

[1] 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. 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.

[2] 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.

[3] 袁迎菊,才庆祥,汤万钧,等. 露天采矿对生态脆弱区水资源的影响及其对策[J]. 煤炭工程,2012,44(5):99−100. YUAN Yingju,CAI Qingxiang,TANG Wanjun,et al. Surface mining affected water resources in ecological weak zone and countermeasures[J]. Coal Engineering,2012,44(5):99−100.

[4] 钱鸣高,许家林,缪协兴. 煤矿绿色开采技术[J]. 中国矿业大学学报,2003,32(4):343−348. QIAN Minggao,XU Jialin,MIAO Xiexing. Green technique in coal mining[J]. Journal of China University of Mining & Technology,2003,32(4):343−348.

[5] 钱鸣高,缪协兴,许家林. 资源与环境协调(绿色)开采[J]. 煤炭学报,2007,32(1):1−7. QIAN Minggao,MIAO Xiexing,XU Jialin. Green mining of coal resources harmonizing with environment[J]. Journal of China Coal Society,2007,32(1):1−7.

[6] 缪协兴,钱鸣高. 中国煤炭资源绿色开采研究现状与展望[J]. 采矿与安全工程学报,2009,26(1):1−14. MIAO Xiexing,QIAN Minggao. Research on green mining of coal resources in China:Current status and future prospects[J]. Journal of Mining & Safety Engineering,2009,26(1):1−14.

[7] 钱鸣高,许家林,王家臣. 再论煤炭的科学开采[J]. 煤炭学报,2018,43(1):1−13. QIAN Minggao,XU Jialin,WANG Jiachen. Further on the sustainable mining of coal[J]. Journal of China Coal Society,2018,43(1):1−13.

[8] 张雁. 露天煤矿防渗墙截渗减排机制及工程应用研究[D]. 北京：煤炭科学研究总院，2018.

ZHANG Yan. Study on the mechanism and engineering application of seepage cutoff and drainage reduction of diaphragm wall in open–pit coal mine[D]. Beijing：China Coal Research Institute，2018.

[9] 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.

[10] 张雁，靳德武，黄选明. 防渗墙技术在露天煤矿截渗减排中的研究与应用[M]. 北京：地质出版社，2020.

[11] 李浩荡,佘长超,周永利,等. 我国露天煤矿开采技术综述及展望[J]. 煤炭科学技术,2019,47(10):24−35. LI Haodang,SHE Changchao,ZHOU Yongli,et al. Summary and prospect of open−pit coal mining technology in China[J]. Coal Science and Technology,2019,47(10):24−35.

[12] 薛禹群,吴吉春,谢春红,等. 元宝山露天煤矿地下水疏干数值模拟[J]. 煤炭学报,1996,21(3):255−260. XUE Yuqun,WU Jichun,XIE Chunhong,et al. Numerical simulation of ground water drainage for Yuanbaoshan opencast coal mine[J]. Journal of China Coal Society,1996,21(3):255−260.

[13] 赵艳娥. 露天煤矿疏干排水方式的探讨[J]. 内蒙古师范大学学报(自然科学(汉文)版),2003,32(4):32−34. ZHAO Yan’e. Discussion on drainage way of open−pit coal mine[J]. Journal of Inner Mongolia Normal University (Natural Science Edition),2003,32(4):32−34.

[14] 李念源,李焕忠. 抚顺东露天矿北帮浅部地下水治理[J]. 露天采矿技术,2016,31(1):1−4. LI Nianyuan,LI Huanzhong. Shallow underground water control in Fushun east open−pit mine north slope[J]. Opencast Mining Technology,2016,31(1):1−4.

[15] 刘维玉,郝继峰,刘永刚. 平朔东露天矿水文地质特征分析及防治水措施[J]. 露天采矿技术,2016,31(5):12−15. LIU Weiyu,HAO Jifeng,LIU Yonggang. Analysis of hydrogeological characteristics and water control measures in Pingshuo east open–pit mine[J]. Opencast Mining Technology,2016,31(5):12−15.

[16] 魏金发,宋成顺,李希耀. 伊敏露天矿采区防治水分析[J]. 露天采矿技术,2015,30(9):35−37. WEI Jinfa,SONG Chengshun,LI Xiyao. Analysis on prevention and control of water in Yimin open−pit mine mining area[J]. Opencast Mining Technology,2015,30(9):35−37.

[17] 董书宁,王海,黄选明,等. 基于保障生态地下水位的露天煤矿主动保水技术研究[J]. 煤炭科学技术,2021,49(4):49−57. DONG Shuning,WANG Hai,HUANG Xuanming,et al. Research on active water conservation technology in open–pit coal mine based on ecological protection groundwater level[J]. Coal Science and Technology,2021,49(4):49−57.

[18] 李全生. 东部草原区大型煤电基地开发的生态影响与修复技术[J]. 煤炭学报,2019,44(12):3625−3635. LI Quansheng. Progress of ecological restoration and comprehensive remediation technology in large–scale coal–fired power base in the eastern grassland area of China[J]. Journal of China Coal Society,2019,44(12):3625−3635.

[19] 孙亚军,陈歌,徐智敏,等. 我国煤矿区水环境现状及矿井水处理利用研究进展[J]. 煤炭学报,2020,45(1):304−316. SUN Yajun,CHEN Ge,XU Zhimin,et al. Research progress of water environment,treatment and utilization in coal mining areas of China[J]. Journal of China Coal Society,2020,45(1):304−316.

[20] 王超,董少刚,贾志斌,等. 草原露天煤矿区植被对地下水位埋深变化的响应[J]. 生态学报,2020,40(19):6925−6937. WANG Chao,DONG Shaogang,JIA Zhibin,et al. Responses of vegetation to depth to the groundwater table in the grassland open–pit coal mine area[J]. Acta Ecologica Sinica,2020,40(19):6925−6937.

[21] 邢恩德,何京丽,张铁钢,等. 煤矿开采对矿坑周边植被覆盖度、生物量、土壤水分和地下水位的影响[J]. 草原与草坪,2019,39(4):53−57. XING Ende,HE Jingli,ZHANG Tiegang,et al. Grassland ecological factors on industrial disturbance response law research[J]. Grassland and Turf,2019,39(4):53−57.

[22] 崔英杰,魏永富,郭中小,等. 生态脆弱草原区地下水位对降水要素变化的响应[J]. 节水灌溉,2017(9):60−64. CUI Yingjie,WEI Yongfu,GUO Zhongxiao,et al. Response of groundwater level to variation of precipitation factors in ecologically fragile grassland areas[J]. Water Saving Irrigation,2017(9):60−64.

[23] 黄文干. 露天矿疏干和堵水帷幕[J]. 煤炭工程,1984,16(3):33−36. HUANG Wengan. Dewatering and water blocking curtain of open–pit coal mine[J]. Coal Engineering,1984,16(3):33−36.

[24] 张雁. 露天煤矿截渗减排新技术[J]. 露天采矿技术,2017,32(6):45−47. ZHANG Yan. New technology of cutting off seepage channel and reducing water drainage in open–pit coal mine[J]. Opencast Mining Technology,2017,32(6):45−47.

[25] 丛蔼森. 地下连续墙的设计施工与应用[M]. 北京：中国水利水电出版社，2002.

[26] 赵毅. 国外露天矿帷幕堵水及在我国的应用前景[J]. 露天采矿技术,1987,2(3):24−30. ZHAO Yi. Water blocking curtain in open–pit mines abroad and application prospect in China[J]. Opencast Mining Technology,1987,2(3):24−30.

[27] 陈勤树. 我国矿区注浆帷幕截流技术的研究与应用[J]. 矿业研究与开发,1993,13(增刊2):8−18. CHEN Qinshu. Research and application of curtain grout technology for flow cut–off in China’s mines[J]. Mining Research and Development,1993,13(Sup.2):8−18.

[28] 刘基,靳德武,姬亚东,等. 复杂水文地质条件下大型帷幕截流工程效果数值仿真分析[J]. 煤炭学报,2019,44(8):2427−2436. LIU Ji,JIN Dewu,JI Yadong,et al. Numerical simulation analysis of closure effect of large curtain work with complex hydrogeological conditions[J]. Journal of China Coal Society,2019,44(8):2427−2436.

[29] 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.

[30] 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.

[31] 张雁. 露天煤矿防渗墙构建条件与类型[J]. 煤炭技术,2019,38(7):25−28. ZHANG Yan. Construction conditions and types of diaphragm wall in open−pit coal mine[J]. Coal Technology,2019,38(7):25−28.

[32] 张雁,靳德武,石磊. 基于数值模拟的截水帷幕渗透系数研究[J]. 煤炭技术,2021,40(2):99−102. ZHANG Yan,JIN Dewu,SHI Lei. Study on permeability coefficient of cutoff curtain based on numerical simulation[J]. Coal Technology,2021,40(2):99−102.

[33] 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. 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.

[34] 王海,黄选明,朱明诚,等. 基于高掺量粉煤灰防渗墙的露天矿水资源保护技术[J]. 煤炭学报,2020,45(3):1160−1169. WANG Hai,HUANG Xuanming,ZHU Mingcheng,et al. Water–preserved coal mining technology in open pit based on cutoff wall with high fly ash content[J]. Journal of China Coal Society,2020,45(3):1160−1169.

[35] 李文嵩,党亚堃,朱明诚,等. 露天煤矿截水帷幕防渗膜垂向隐蔽铺设施工工艺[J]. 煤田地质与勘探,2020,48(4):68−73. LI Wensong,DANG Yakun,ZHU Mingcheng,et al. Construction technology of vertical concealed laying of anti−seepage membrane for water cutoff curtain in the open−pit coal mine[J]. Coal Geology & Exploration,2020,48(4):68−73.

[36] 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. 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.

[37] 张雁,黄选明,陈实,等. 露天煤矿草原区植被指数与气象水文要素关系[J]. 煤田地质与勘探,2020,48(4):94−101. ZHANG Yan,HUANG Xuanming,CHEN Shi,et al. Relationship between NDVI and hydromet factors in grassland area of open–pit coal mine[J]. Coal Geology & Exploration,2020,48(4):94−101.