巨厚富水烧变岩露天边坡隔水煤(岩)柱构造技术研究

doi:10.11799/ce202205025

摘要/Abstract

摘要： 新疆大南湖矿区烧变岩厚度大，富水性强，隔水煤(岩)柱留设与边坡稳定控制问题是露天煤矿开采的关键之一，以新疆大南湖二矿为背景研究地下水与爆破振动耦合作用下烧变岩边坡隔水煤(岩)柱构造技术。通过现场爆破试验和数值模拟分析，揭示了边坡岩体应力和安全系数变化规律，确定了爆破振动影响范围|建立了多岩层隔水煤(岩)柱模型，提出了烧变岩露天矿隔水煤(岩)柱留设方法|基于边坡稳定分析给出烧变岩边坡参数设计方案，采用极限平衡方法对边坡参数进行了优化。结果表明：大南湖二矿隔水煤(岩)柱尺寸为火烧区边界+400m水平留设50m，考虑水力坡降优化后的边坡角为24°，相较原设计提高了2°，地下水与爆破振动耦合作用下烧变岩露天边坡隔水煤(岩)柱构造技术解决了边坡稳定控制及坡面涌水问题，对内蒙古西部及新疆地区烧变岩煤矿的安全开采具有一定参考。

关键词: 露天煤矿, 烧变岩边坡, 隔水煤柱, 爆破振动, 边坡稳定性

Abstract: The key to open-pit coal mining is the setting up of water-resisting coal (rock) pillar and the control of slope stability, based on the background of the No. 2 Mine in Dananhu, Xinjiang, the paper studies the technique of coal (rock) pillar structure of the burnt rock slope under the coupling action of ground water and blasting vibration. Based on the field blasting test and numerical simulation analysis, the variation law of rock mass stress and Factor of safety is revealed, the range of blasting vibration is determined, and the water-proof coal (rock) pillar model of multi-rock strata is established, based on the analysis of the slope stability, the design scheme of the parameters of the burnt rock slope is given, and the parameters of the slope are optimized by the limit equilibrium method. The results show that the size of water-proof coal (rock) pillar is 50m at the boundary of burning area + 400m and the Slope Angle is 24 ° , which is 2 ° higher than the original design, under the coupling action of ground water and blasting vibration, the construction technology of water-resisting coal (Rock) pillar in burnt rock open-pit slope solves the problems of slope stability control and water gushing, under the premise of ensuring the safety of the slope, the maximum economic benefit of the burnt rock opencast mine is realized.

中图分类号:

TD804

李伟郭夏飞. 巨厚富水烧变岩露天边坡隔水煤(岩)柱构造技术研究[J]. 煤炭工程, 2022, 54(5): 137-141.

参考文献

[1] 范立民.生态脆弱区烧变岩研究现状及方向[J].西北地质，2010， 43（3）：57-65.
FAN Li-min. Research Status and Research Directions of Burnt Rocks in Vulnerable Ecological Region[J].NORTHESTERN GEOLOGY, 2010，43（3）：57-65.
[2] 王志宇，史波波，刘鹏．煤田火区烧变岩成岩机理与利用[J]．科学技术与工程，2020，20(15):6004-6010.
Wang Zhiyu，Shi Bobo，Liu Peng．Formation and utilization of burnt rock in coalfield fire area[J]． Science Technology and Engineering，2020，20(15):6004-6010.
[3] 尚文凯,王东,曹兰柱,等. 露天矿顺倾层状边坡稳定性的断层效应[J]. 有色金属(矿山部分), 2015, (3): 106-111.
Shang Wenkai, Wang Dong, Cao Lanzhu, etc. . The fault effect on the stability of bedding slope in open pit mine J. Non-ferrous metal, 2015,3:106-111.
[4] 曹兰柱,祁利民,王东,等. 露天矿含断层复合边坡稳定性[J]. 辽宁工程技术大学学报(自然科学版), 2016, 35(8): 22-27.
Cao Lanzhu, Qi Limin, Wang Dong, etc. . Stability of fault-bearing composite slope in open-pit mine. Proceedings of the Liaoning Technical University, 2016,358:22-27.
[5] 郭启文，王金启，陈晓国，等.烧变岩突水灾害治理技术[J].中州煤炭，2001（5）：65-66.
GUO Qiwen, WANG Jinqi, CHEN Xiaoguo, et al. Treatment of water outburst in metamorphic rock[J]. Zhongzhou Coal, 2001（5）：65-66.
[6] 范立民，孙魁，李成，等．西北大型煤炭基地地下水监测背景、思路及方法［J］．煤炭学报，2020，45(1) : 317－329．
FAN Limin，SUN Kui，LI Cheng，et al．Background，thought and method of groundwater monitoring in large coal base of northwest China[J]．Journal of China Coal Society，2020，45(1) : 317－329．
[7] 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，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．
[8] 范立民，向茂西，彭捷，等．毛乌素沙漠与黄土高原接壤区泉的演化分析[J]．煤炭学报，2018，43(1):207－218．
FAN Limin，XIANG Maoxi，PENG Jie，et al． Evolution analysis on springs in contiguous area of Maowusu Desert and Loess Plateau [J]．Journal of China Coal Society，2018，43(1) : 207-218．
[9] 马雄德，范立民，张晓团，等．榆神府矿区水体湿地演化驱动力分析[J]．煤炭学报，2015，40(5):1126 － 1133．
Ma Xiongde，Fan Limin，Zhang Xiaotuan，et al． Driving force analysis for water and wetlands evolution at Yushenfu mining area[J]． Journal of China Coal Society，2015，40(5):1126-1133．
[10] 马雄德，范立民，严戈，等．植被对矿区地下水位变化响应研究[J]．煤炭学报，2017，42(1) : 44－49．
Ma Xiongde，Fan Limin，Yan Ge，et al．Vegetation responses to groundwater level change in mining area[J]．Journal of China Coal Society，2017，42(1) : 44－49．
[11] 许延春.综放开采防水煤岩柱保护层的“有效隔水厚度”留设方法[J].煤炭学报，2005，30（3）：305-308.
Xu Yanchun. Design methods of the effective water-resisting thickness for the protective seam of the water barrier in fully-caving mechanized coal mining [J]．Journal of China Coal Society，2005，30（3）：305-308.
[12] 温思南.煤矿断层防隔水煤柱留设宽度研究[J].能源语节能，2020，3：20-21.
Wen Sinan. Research on the Width of Waterproof Coal Pillar for Fault[J].ENERGY AND ENERGR CONSERVATION, 2020，3：20-21.
[13] 何也，聂新辉.三河尖煤矿张庄断层防隔水煤柱留设探讨[J].煤炭科技，2019，2：10-12.
He Ye，Nie Xinhui. Discussion on Retaining Water-proof Pillars for Zhangzhuang Fault in Sanhejian Coal Mine[J].COAL SCIENCE & TECHNOLOGY MAGAZINE，2019，2：10-12.
[14] 李光辉，王杰，谢道雷，等.基于断层封闭性的导水性评价及防隔水煤柱设计[J].中国矿业，2021，30（3）：138-143.
Li Guanghui，Wang Jie， Xie Daolei，et al．Evaluation of water conductivity based on fault sealing peoperty and design of water-proof coal pillar[J].CHINA MINING MAGAZINE，2021，30（3）：138-143.
[15] 项林语，赵雅，杜金龙，等.松软煤层抗张强度及防隔水煤柱宽度的研究[J].煤，2021，30（5）：6-10.
Xiang Linyu，Zhao Ya，Du Jinlong，et al．Application of Point Load Test in Research on Tensile Strength of Loose Coal Seam and Width of Coal Pillar[J]. COAL，2021，30（5）：6-10.
[16] 李昌虎，李高奇.高应力条件下孤岛工作面隔水煤柱宽度研究[J].中阿科技论坛（中英文），2020，（05）：047-048.
Li Changhu，Li Gaoqi. Study on the Width of the Water-Isolating Coal Pillars in the Island
Face under High Stress[J]. China-Arab States Science and Technology Forum，2020，（05）：047-048.
[17] 国家安全生产监督管理总局、国家煤矿安全监察局.煤矿防治水规定 [M]. 煤炭工业出版社,2009.