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学者姓名：黄明清
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Abstract ：
地下金属矿山复杂应力条件下围岩破碎和软弱性给巷道支护设计带来了重大挑战.本研究以塞尔维亚某铜金矿为研究对象,采用FLAC3D有限差分软件对3种巷道类型和两级破碎岩性进行数值模拟,评估现有支护设计的合理性,并优化适用于不同围岩条件的支护参数.结果表明,-200 m中段巷道的失稳主要由高地应力、围岩临空面变形共同引起,其典型破坏形式包括压顶破坏、尖顶破坏、锚杆支护系统失效以及喷射混凝土层的外鼓开裂等.Ⅳ、Ⅴ级围岩巷道的顶板沉降量大致在允许范围内,但两帮的累计相对位移普遍超限,表明现有支护设计在控制两帮变形方面存在不足.将-200 m中段Ⅳ、Ⅴ级围岩巷道,支护参数优化为锚杆间距0.8 m × 1.0 m、锚索间距2.0 m ×3.0 m以及喷射混凝土厚度125 mm,从而满足了符合安全要求,研究成果为地下金属矿山破碎岩体支护优化提供了理论支持.
Keyword ：
合理性分析 合理性分析 支护优化 支护优化 数值模拟 数值模拟 破碎软弱围岩 破碎软弱围岩
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| GB/T 7714 | 李国骁 , 黄泽隆 , 薛小蒙 et al. 破碎岩体巷道失稳机理及支护数值模拟 [J]. | 有色设备 , 2025 , 39 (1) : 41-49 . |
| MLA | 李国骁 et al. "破碎岩体巷道失稳机理及支护数值模拟" . | 有色设备 39 . 1 (2025) : 41-49 . |
| APA | 李国骁 , 黄泽隆 , 薛小蒙 , 路丰豪 , 陈继伦 , 黄明清 . 破碎岩体巷道失稳机理及支护数值模拟 . | 有色设备 , 2025 , 39 (1) , 41-49 . |
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Waste rocks and tailings are widely applied materials in underground metal mines to backfill mined-out areas. To test the effect of low calcium fly ash on slurry fluidity and long-term strength of cemented paste backfill, orthogonal experiments of backfill proportions with variable levels of waste, tailing, fly ash, water and their combinations were carried out. Results show that slurry slump is most sensitive to mass concentration, and slurry fluidity is optimal when fly ash-cement ration is 1:1. The long-term strength of cemented paste backfill after curing for 56 days is significantly affected by cement-(tailing + waste) ratio, and slightly evolves regardless of fly ash-cement ratio. Fly ash promotes the generation of active silicon oxide and aluminum oxide, which fills the pores within the backfill. The optimal proportion of cemented paste backfill is 77% mass concentration, 8:2 tailing-waste ratio, 1:30 cement-(tailing + waste) ratio and 1:1 fly ash-cement ratio. The correlative slurry slump and long-term backfill strength meet the requirement of pumping and backfill mining. Additionally, an industrial scale loop pumping test of backfill slurry shows the pipeline transportation resistance is 4 kPa/m, pipeline diameter is optimal at 150 mm, and flow rate is optimal at 90– 100 m3/h. The experiment confirms that proper addition of low calcium fly ash is conducive to improve the slurry fluidity and long-term strength of cemented paste backfill. © 2024 Geological Society of India, Bengaluru, India.
Keyword ：
cemented paste backfill cemented paste backfill long-term strength long-term strength loop pumping test loop pumping test low calcium fly ash low calcium fly ash slurry slump slurry slump
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| GB/T 7714 | Huang, M. , Zheng, Q. , Liu, Q. et al. Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash [J]. | Journal of the Geological Society of India , 2024 , 100 (9) : 1338-1346 . |
| MLA | Huang, M. et al. "Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash" . | Journal of the Geological Society of India 100 . 9 (2024) : 1338-1346 . |
| APA | Huang, M. , Zheng, Q. , Liu, Q. , Gao, Z. . Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash . | Journal of the Geological Society of India , 2024 , 100 (9) , 1338-1346 . |
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Abstract ：
Waste rocks and tailings are widely applied materials in underground metal mines to backfill mined-out areas. To test the effect of low calcium fly ash on slurry fluidity and long-term strength of cemented paste backfill, orthogonal experiments of backfill proportions with variable levels of waste, tailing, fly ash, water and their combinations were carried out. Results show that slurry slump is most sensitive to mass concentration, and slurry fluidity is optimal when fly ash-cement ration is 1:1. The longterm strength of cemented paste backfill after curing for 56 days is significantly affected by cement-(tailing + waste) ratio, and slightly evolves regardless of fly ash-cement ratio. Fly ash promotes the generation of active silicon oxide and aluminum oxide, which fills the pores within the backfill. The optimal proportion of cemented paste backfill is 77% mass concentration, 8:2 tailing-waste ratio, 1:30 cement-(tailing + waste) ratio and 1:1 fly ash-cement ratio. The correlative slurry slump and long-term backfill strength meet the requirement of pumping and backfill mining. Additionally, an industrial scale loop pumping test of backfill slurry shows the pipeline transportation resistance is 4 kPa/m, pipeline diameter is optimal at 150 mm, and flow rate is optimal at 90-100 m3/h. The experiment confirms that proper addition of low calcium fly ash is conducive to improve the slurry fluidity and long-term strength of cemented paste backfill.
Keyword ：
cemented paste backfill cemented paste backfill long-term strength long-term strength loop pumping test loop pumping test low calcium fly ash low calcium fly ash slurry slump slurry slump
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| GB/T 7714 | Huang, Mingqing , Zheng, Qiwei , Liu, Qingling et al. Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash [J]. | JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA , 2024 , 100 (9) : 1338-1346 . |
| MLA | Huang, Mingqing et al. "Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash" . | JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA 100 . 9 (2024) : 1338-1346 . |
| APA | Huang, Mingqing , Zheng, Qiwei , Liu, Qingling , Gao, Zhong . Improvement of Fluidity and Long-term Strength of Cemented Paste Backfill with Low Calcium Fly-ash . | JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA , 2024 , 100 (9) , 1338-1346 . |
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Rock fragment movement during blasting operations is a major cause of ore and profit losses in hard rock open-pit mines having a complex-orebody. To address this issue, a novel multilayer dig-limit approach, which well considers blast movement in dig-limit optimization, was proposed in this study by combining machine learning techniques and practical heuristic algorithms. First, horizontal and vertical blast-induced rock movement distances were predicted using a supervised learning model. Then, the movement direction of rock fragments was computed based on the initiation sequence. After meshing the blast block into rock units, the blasted muckpile and post-blast ore boundary were determined, providing a good basis for dig-limit determination. Finally, the optimized dig-limit with maximum profit can be calculated using a practical heuristic algorithm. By applying this method in a case study, the ore recovery and economic profit were improved, compared with manually drawn dig-limit method. Additionally, the impact of equipment size, number of layers and powder factor on the application of this method was discussed. The obtained results indicated that ore and profit losses can be reduced with a decreased equipment size, increased number of layers and decreased powder factor. A multilayer dig-limit approach considering blast-induced rock movement and dig-limit optimization was proposed.The multilayer dig-limit approach yields higher ore recovery and economic profit compared to manually drawn dig-limit.Ore losses can be reduced by decreasing the equipment size, increasing the number of layers and decreasing the powder factor.
Keyword ：
Blast-induced rock movement Blast-induced rock movement Complex-orebody open-pit blast Complex-orebody open-pit blast Economic profit Economic profit Multilayer dig-limit optimization Multilayer dig-limit optimization Ore recovery Ore recovery
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| GB/T 7714 | Yu, Zhi , Shi, Xiu-Zhi , Zhang, Zong-Xian et al. A Multilayer Dig-Limit Approach for Reducing Ore and Profit Losses in an Open-Pit Mine Having Complex Orebody [J]. | ROCK MECHANICS AND ROCK ENGINEERING , 2024 , 57 (9) : 7425-7441 . |
| MLA | Yu, Zhi et al. "A Multilayer Dig-Limit Approach for Reducing Ore and Profit Losses in an Open-Pit Mine Having Complex Orebody" . | ROCK MECHANICS AND ROCK ENGINEERING 57 . 9 (2024) : 7425-7441 . |
| APA | Yu, Zhi , Shi, Xiu-Zhi , Zhang, Zong-Xian , Zhou, Jian , Cai, Xing-Qi , He, Song et al. A Multilayer Dig-Limit Approach for Reducing Ore and Profit Losses in an Open-Pit Mine Having Complex Orebody . | ROCK MECHANICS AND ROCK ENGINEERING , 2024 , 57 (9) , 7425-7441 . |
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Backfill of cemented waste rock into underground mined-out areas is an effective way to eliminate solid wastes and potential hazards in mines. To understand the backfill strength distribution law throughout the stope, similarity simulation experiments were conducted for direct-irrigating cemented waste rock backfill, and OpenCV and neural network were employed to analyze particle segregation and the spatial distribution of backfill strength. Results show that distinct gravitational segregation leads to an uneven and heterogeneous distribution of natural graded waste rocks in a similar model. Backfill strength near sidewalls and bottom of the model surpasses that of other areas. In the vertical direction, the average backfill strength increases with depth, ranging from 1.15 MPa at the topmost layer to 1.91 MPa at the bottommost layer. Horizontally, the average backfill strength near model boundaries is consistently higher than that at the model center, irrespective of the layer depth and orientation. Neural network prediction on spatial backfill strength proves reliable, exhibiting an average relative error of 4.12%, compared to the traditional surface fitting with a 10.20% error. Verification tests affirm the capability of the neural network model to accurately predict the anisotropic and nonlinear distribution of backfill strength in a large stope.
Keyword ：
backfill strength backfill strength neural network neural network OpenCV OpenCV similarity simulation experiment similarity simulation experiment spatial distribution law spatial distribution law
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| GB/T 7714 | Gao, Zhong , Huang, Mingqing , Zhan, Shulin et al. Strength distribution of cemented waste rock backfill: a similarity simulation experiment [J]. | FRONTIERS IN EARTH SCIENCE , 2024 , 11 . |
| MLA | Gao, Zhong et al. "Strength distribution of cemented waste rock backfill: a similarity simulation experiment" . | FRONTIERS IN EARTH SCIENCE 11 (2024) . |
| APA | Gao, Zhong , Huang, Mingqing , Zhan, Shulin , Tan, Wei . Strength distribution of cemented waste rock backfill: a similarity simulation experiment . | FRONTIERS IN EARTH SCIENCE , 2024 , 11 . |
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Abstract ：
水力压裂是硬岩金属矿山崩落法开采的关键预处理手段,但矿体中天然裂隙的存在限制了水力裂缝定向扩展与空间展布形态。为研究在含天然裂缝的铜矿体中天然裂缝的长度和水平距离对定向水力裂缝扩展路径的影响,利用ABAQUS建立了嵌入黏聚力单元的有限元模型,模拟不同天然裂缝长度和水平距离条件下的水力压裂行为。结果表明,天然裂缝的长度和水平距离对裂缝的扩展具有积极影响。天然裂缝长度与水力裂缝扩展半径呈指数关系,天然裂缝水平距离与水力裂缝扩展半径呈线性关系。在0～1.5 MPa低地应力差条件下,随着天然裂缝水平距离的减少或天然裂缝长度的增加,水力裂缝的扩展半径越大。研究结果对硬岩天然裂缝条件下的水力压裂裂缝定向扩展与调控有积极的指导意义。
Keyword ：
天然裂缝 天然裂缝 孔隙发育 孔隙发育 水力裂缝 水力裂缝 裂缝扩展 裂缝扩展 黏聚力单元 黏聚力单元
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| GB/T 7714 | 王伟澄 , 黄明清 , 黄敏 et al. 硬岩水力定向压裂裂缝扩展对天然裂缝的响应行为 [J]. | 金属矿山 , 2024 , 9 (04) : 53-61 . |
| MLA | 王伟澄 et al. "硬岩水力定向压裂裂缝扩展对天然裂缝的响应行为" . | 金属矿山 9 . 04 (2024) : 53-61 . |
| APA | 王伟澄 , 黄明清 , 黄敏 , 唐绍辉 . 硬岩水力定向压裂裂缝扩展对天然裂缝的响应行为 . | 金属矿山 , 2024 , 9 (04) , 53-61 . |
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分段凿岩阶段空场嗣后充填法是倾斜中厚矿体的高效采矿方法,但爆破、充填与采场稳定性之间关系复杂,可能存在地表塌陷、顶底板垮塌和回采损失率高的问题.采用工程类比、工业试验等手段,从回采顺序、切割方式、底部结构布置等方面对倾斜中厚矿体分段凿岩阶段空场嗣后充填法进行了工艺优化,并提出采场内不留间柱的布置方法.该方法在一步骤充填后将充填体侧帮直接与矿房相连接,并采用挤压爆破提高充填体强度和矿块的回采率.实施时间是该方法的关键,ANSYS/LS-DYNA数值模拟表明:采用中深孔挤压爆破形成切割槽时,应在采场充填及充填体养护7～9 d后进行.工程实践表明该方法具有可行性,能够为矿山生产提供技术支撑.
Keyword ：
ANSYS/LS-DYNA ANSYS/LS-DYNA 倾斜中厚矿体 倾斜中厚矿体 分段凿岩阶段空场嗣后充填法 分段凿岩阶段空场嗣后充填法 切割槽 切割槽 底部结构 底部结构
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| GB/T 7714 | 黄敏 , 王晓军 , 邱纪香 et al. 倾斜中厚矿体阶段空场嗣后充填采矿工艺优化研究 [J]. | 矿业科学学报 , 2024 , 9 (4) : 483-492 . |
| MLA | 黄敏 et al. "倾斜中厚矿体阶段空场嗣后充填采矿工艺优化研究" . | 矿业科学学报 9 . 4 (2024) : 483-492 . |
| APA | 黄敏 , 王晓军 , 邱纪香 , 谷亚州 , 蔡思杰 , 黄明清 . 倾斜中厚矿体阶段空场嗣后充填采矿工艺优化研究 . | 矿业科学学报 , 2024 , 9 (4) , 483-492 . |
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硬岩矿体自然崩落过程中崩落顶板压力拱加剧了崩落边界的应力集中,崩落进程易受拱脚两侧的夹制而受阻。通过崩落顶板压力拱极限自稳平衡计算及数值模拟分析硬岩崩落顶板成拱特征及崩落中止的潜在区域,进而探讨通过边界弱化来预处理硬岩的工程措施。引入成拱系数及崩落损伤因子表征拉底上方不同区域岩体塑性区的逐年发展趋势,采用塑性区相对位置反映割帮位置及割帮时机,从而解决边界弱化的时效性问题。结果表明:硬岩矿体在上向崩落过程中,崩落顶板易形成自稳平衡拱并引起崩落减缓或中止,崩落顶板顶部压力和水平压力是引起压力拱持续破坏的直接因素;拉底推进时崩落压力拱跨度以非均匀速率不断增加,压力拱边界随着拉底的推进而不断前移,且拉底推进线前方始终处于高应力集中区域。当上盘矿岩交界处塑性区出现的时间滞后于拉底前锋时,可采用割帮来破坏崩落拱平衡并促进持续崩落。研究结果有助于确定硬岩矿体自然崩落法边界弱化的区域与时机。
Keyword ：
崩落损伤因子 崩落损伤因子 平衡拱 平衡拱 自然崩落法 自然崩落法 边界弱化 边界弱化
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| GB/T 7714 | 黄明清 , 张厚缘 , 郭晓强 et al. 硬岩矿体自然崩落过程成拱特征及其边界弱化 [J]. | 金属矿山 , 2024 , PageCount-页数: 8 (05) : 84-91 . |
| MLA | 黄明清 et al. "硬岩矿体自然崩落过程成拱特征及其边界弱化" . | 金属矿山 PageCount-页数: 8 . 05 (2024) : 84-91 . |
| APA | 黄明清 , 张厚缘 , 郭晓强 , 郑其伟 , 刘青灵 . 硬岩矿体自然崩落过程成拱特征及其边界弱化 . | 金属矿山 , 2024 , PageCount-页数: 8 (05) , 84-91 . |
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矿岩自然崩落过程中初始崩落与持续崩落的作用机制影响崩落时空演化规律。为了研究拉底方向与拉底高度对自然崩落法矿山初始与持续崩落过程的影响,采用FLAC~(3D)数值模拟,开展斑岩型厚大铜矿拉底推进方向垂直或平行于最大主应力方向、拉底高度8～12 m条件下的初始崩落条件、持续崩落条件、崩落体形态、崩落矿量的规律研究。结果表明,累积拉底面积与崩落高度呈二次函数关系;在发生初始崩落后,累积拉底面积与累积崩落矿量呈指数函数关系。当拉底方向一定时,崩落高度随着拉底高度的增大而增大,且拉底高度大时有利于提早诱发初始崩落与持续崩落,累积崩落矿量整体呈增长趋势。拉底方向垂直最大主应力时比平行于最大主应力时更易诱发初始崩落、持续崩落。研究结果揭示了拉底参数对矿岩初始与持续崩落的影响机制,可为硬岩矿山自然崩落法的基础研究提供依据。
Keyword ：
初始崩落 初始崩落 崩落规律 崩落规律 拉底方向 拉底方向 拉底高度 拉底高度 持续崩落 持续崩落
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| GB/T 7714 | 王伟澄 , 黄明清 , 刘青灵 et al. 自然崩落法拉底参数对矿岩初始与持续崩落的影响机制 [J]. | 金属矿山 , 2024 , PageCount-页数: 9 (08) : 1-9 . |
| MLA | 王伟澄 et al. "自然崩落法拉底参数对矿岩初始与持续崩落的影响机制" . | 金属矿山 PageCount-页数: 9 . 08 (2024) : 1-9 . |
| APA | 王伟澄 , 黄明清 , 刘青灵 , 高忠 , 唐绍辉 . 自然崩落法拉底参数对矿岩初始与持续崩落的影响机制 . | 金属矿山 , 2024 , PageCount-页数: 9 (08) , 1-9 . |
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本文以塞尔维亚某铜矿大型破碎硐室开挖为工程背景,结合地质特征和作业条件确定了硐室开挖工艺与支护方法,基于加固拱等理论计算了锚杆、预应力长锚索等支护参数.结果表明,单侧导硐正台阶分层施工可实现不良岩层大型硐室开挖过程稳定性,其中上分层拱部"导硐+扩刷"三步开挖比一次开挖成形时顶板竖向位移和侧帮水平位移分别减少了 27.9％和35.7％;锚-网-喷-锚索临时支护和钢筋混凝土永久支护的联合支护条件下,破碎硐室的顶板应力拱与侧帮受拉应力大幅减小,围岩位移量及塑性区最大深度减小明显,保障了硐室开挖与服役期间的安全.
Keyword ：
台阶分层开挖 台阶分层开挖 破碎硐室 破碎硐室 联合支护 联合支护 预应力长锚索 预应力长锚索
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| GB/T 7714 | 苏永定 , 薛小蒙 , 李国骁 et al. 大型硐室分层开挖支护参数优化与稳定性模拟 [J]. | 中国矿山工程 , 2024 , 53 (6) : 1-5,12 . |
| MLA | 苏永定 et al. "大型硐室分层开挖支护参数优化与稳定性模拟" . | 中国矿山工程 53 . 6 (2024) : 1-5,12 . |
| APA | 苏永定 , 薛小蒙 , 李国骁 , 路丰豪 , 黄明清 . 大型硐室分层开挖支护参数优化与稳定性模拟 . | 中国矿山工程 , 2024 , 53 (6) , 1-5,12 . |
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