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Using deep neural networks coupled with principal component analysis for ore production forecasting at open-pit mines

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Journal of Rock Mechanics and Geotechnical engineering 2024年第3期16卷 727-740页

作者： Chengkai Fan Na Zhang Bei Jiang Wei Victor Liu Department of Civil and Environmental engineering University of AlbertaEdmontonAlbertaT6G 2E3Canada Department of Mathematical and Statistical Sciences University of AlbertaEdmontonAlbertaT6G 2G1Canada

Ore production is usually affected by multiple influencing inputs at open-pit mines.Nevertheless,the complex nonlinear relationships between these inputs and ore production remain unclear.This becomes even more challenging when training data(e.***.truck haulage information and weather conditions)are massive.In machine learning(ML)algorithms,deep neural network(DNN)is a superior method for processing nonlinear and massive data by adjusting the amount of neurons and hidden layers.This study adopted DNN to forecast ore production using truck haulage information and weather conditions at open-pit mines as training data.Before the prediction models were built,principal component analysis(PCA)was employed to reduce the data dimensionality and eliminate the multicollinearity among highly correlated input variables.To verify the superiority of DNN,three ANNs containing only one hidden layer and six traditional ML models were established as benchmark models.The DNN model with multiple hidden layers performed better than the ANN models with a single hidden layer.The DNN model outperformed the extensively applied benchmark models in predicting ore production.This can provide engineers and researchers with an accurate method to forecast ore production,which helps make sound budgetary decisions and mine planning at open-pit mines.

关键词： Oil sands production Open-pit mining Deep learning Principal component analysis(PCA) Artificial neural network mining engineering

The future of underground spatial planning and the resulting potential risks from the point of view of mining subsidence engineering

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International Journal of mining Science and Technology 2020年第1期30卷 93-98页

作者： Carolina Brücker Axel Preuβe Institute for Mine Surveying Mining Subsidence Engineering and Geophysics in MiningRWTH Aachen UniversityWüllnerstr.2Aachen 52062Germany

The topic of ground movements in Germany has been studied extensively in the past,especially in the field of active mines.The active hard coal mines in Germany were finally shut down in 2018 and lignite mining is expected to take place only until 2038.The so-called long-term liabilities of the mine operators in Germany include,among other things,the long-term guarantee of stability and thus the monitoring of ground motion.So far,the economic use of underground mining in Germany was mainly the supply of raw materials.In the future,the underground storage of compressed air,methane or hydrogen will play an important role in renewable energy supply and climate change.Therefore,the underground storage space will become more important and the spatial planning is essential to ensure availability of safe underground openings for the various options of environmentally friendly energy storage.However,this renewed usage of underground openings may also bring new and sometimes unknown challenges of geomechanical influence.The aftermath of hard coal and lignite mining will be an increasing challenge in mining subsidence engineering.On the other hand,new possibilities due to underground spatial planning may lead to subsidence and/or heaving of the upper surface.

关键词： mining Surveying Underground spatial planning mining engineering Renewable energies

Energy evolution and water immersion‑induced weakening in sandstone roof of coal mines

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International Journal of Coal Science & Technology 2022年第4期9卷 93-106页

作者： Wenjie Liu Ke Yang Shuai Zhang Zhainan Zhang Rijie Xu State Key Laboratory of mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China Hefei Comprehensive National Science Center Institute of EnergyHefei 230031AnhuiChina National and Local Joint engineering Research Center of Precision Coal mining Anhui University of Science and TechnologyHuainan 232001AnhuiChina Key Laboratory of mining Coal Safety and Efciently Constructed By Anhui Province and Ministry of Education Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Coal Resources and Safe mining China University of Mining and TechnologyXuzhou 221116JiangsuChina

The instability of underground spaces in abandoned coal mines with water-immersed rocks is one of the main hazards hindering the geothermal energy use and ecological restoration of post-mining areas.This study conducted graded cyclic loading–unloading tests of fve groups of sandstone samples with diferent water contents.The evolution of input,elastic,dissipated,damping,and plastic energies were explored,considering the damping efect.The normalized plastic energy serves to characterize the damage evolution of sandstone samples,whose failure characteristics were analyzed from both the macroscopic and microscopic perspectives.X-ray difraction technique and scanning electron microscopy were used to reveal the softening mechanism of sandstone.The results show that under graded cyclic loading,input energy,elastic energy,and dissipated energy all increase gradually,and the fraction of elastic energy increases gradually at frst and then tends to stabilize.The variation in the fraction of dissipated energy is opposite to that of elastic energy.In each cycle,the input energy is stored primarily in the form of elastic energy,whereas the dissipated energy is used primarily to overcome the damping of sandstone.When the normalized number of cycles approached unity,the plastic energy fraction sharply increases,while that of the dampening energy drops abruptly.With increasing water content,the efect of pore water on the lubrication,the water wedge,and dissolution of mineral particles becomes more obvious,reducing the elastic-storage limit of sandstone,meanwhile the sandstone damage factor increases signifcantly under the same cycle and the failure mode changes from brittle to ductile.

关键词： mining engineering Energy evolution Water-rock interaction Weakening mechanism

Prospects for the transformation and development of carbon storage in abandoned mines of coal enterprises from the perspective ofcarbon neutrality

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International Journal of Coal Science & Technology 2023年第3期10卷 24-40页

作者： Xin Lyu Tong Zhang Liang Yuan Juejing Fang State Key Laboratory of mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China Institute of Energy Hefei Comprehensive National Science CenterHefei230031China

Under the carbon neutrality goal,coal enterprises must seek breakthroughs from abandoned mines,develop new resources in the new era,turn problems into countermeasures,and participate in the carbon emissions market,for contributing to the accomplishment of the national strategic goal of carbon neutrality.To this end,we investigated the relevant national policies and regulations to clarify the boundaries disclosed by the carbon information of enterprises,understood the development direction of carbon storage in abandoned mines,and clarified the transformation and development of carbon storage in aban-doned mines.We made a few suggestions:(1)China should learn from its past experience and other countries to develop the energy industry with Chinese characteristics and reform the economic system.(2)Coal enterprises must actively respond to the national carbon information disclosure policy,clarify their own responsibilities and carbon emission boundaries.(3)It is necessary to proactively obtain advanced knowledge and plan carbon storage pathways for abandoned mines.(4)Devel-opment problems of coal enterprises should be deduced using cases.The'dual carbon'goals should be achieved steadily step-by-step.(5)Three measures,i.***.improving the existing resource structure,coordinating the information of abandoned mines,and promoting the cultivation of scientific and technological talents.

关键词： mining engineering Abandoned mines Carbon neutrality Carbon emission rights Carbon tax

Mill tailings based composites as paste backfill in mines of U-bearing dolomitic limestone ore

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Journal of Rock Mechanics and Geotechnical engineering 2018年第2期10卷 310-322页

作者： Sandeep Panchal Debasis Deb T.Sreenivas Department of mining engineering Indian Institute of Technology Mineral Processing Division Bhabha Atomic Research Centre

This paper elaborates on the development of paste backfill using mill tailings generated during the processing of a uranium ore deposit hosted in dolomitic limestone. The tailings have been characterized in terms of the physical, chemical and mineralogical properties. Time-dependent rheological behaviors and geotechnical properties of cemented paste backfill(CPB) are also determined. The studies show that the mill tailing has the potential to form paste and the CPB has adequate strength to provide support to mine pillars, roofs, and walls.

关键词： mining engineering Uranium ore deposit Tailings Cemented paste backfill(CPB) Rheology Compressive strength

Protection of cement-soil reinforced regions for adjacent running tunnels during pit excavation

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岩石力学与工程学报 2018年第A1期37卷 3674-3685页

作者： WANG Li ZHENG Gang School of Civil engineering Tianjin University School of Civil and Safety engineering Dalian Jiaotong University

In pit excavation,cement is introduced into ground by deep mixing method to form an improved soil raft below final formation level to diminish deflection of retaining wall and effect on surrounding structure.Owning to complicated site conditions and improper workmanship,there are always some regions left untreated in the embedded improved soil raft.In this work,Several schemes of cement-soil mixed piles arrangement are modeled in order to discuss the effect of different cement-soil reinforced regions on protection for adjacent running tunnels.Finite element results show that:when lateral regions above tunnels are not enhanced by cement-soil mixed piles,effect of enlarging vertical enhanced regions around tunnels on diminishing lateral displacement of tunnel is really small;enhancing the lateral regions next to retaining wall is more effective in reducing the deflection of tunnel and retaining wall;uplifting of tunnel under the middle pit mainly depends on lateral reinforced regions and lateral displacements of retaining wall;as cement-soil mixed piles near retaining wall in east pit are removed during east pit excavation,effect of cement-soil mixed piles in east pit on reducing the final wall deflection can be neglected;upward shaft resistances are exerted along left side of diaphragm wall during excavation,which helps to reduce the wall deflection;positive effect of single-head cement-soil mixed piles in east pit is to decreasing the uplifting of soil inside east pit.Double-head cement-soil mixed piles arranged in"T"shape decrease the effect of east pit excavation on tunnels under middle pit apparently.

关键词： mining engineering deep mixing method cement-soil mixed piles pit excavation deflection uplifting

欢迎订阅2014年《International Journal of Coal Science & mining engineering》杂志

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煤炭学报 2014年第1期 197-197页

《International Journal of Coal Science&mining engineering》(《国际煤炭科学与采矿工程学报》,简称JCSME)是由中国煤炭学会主办、面向国内外公开发行的英文版煤炭科学技术方面的综合性学术刊物。主要刊载煤田地质与勘探、煤矿开采... 详细信息

《International Journal of Coal Science&mining engineering》(《国际煤炭科学与采矿工程学报》,简称JCSME)是由中国煤炭学会主办、面向国内外公开发行的英文版煤炭科学技术方面的综合性学术刊物。主要刊载煤田地质与勘探、煤矿开采、矿山测量、矿井建设、煤矿安全、煤矿机械工程、煤矿电气工程、煤炭加工利用、煤矿环境保护、煤炭经济研究等方面的科研成果和学术论文。JCSME是向世界传播我国煤炭科技的重要媒体,对加强中外科学技术交流,宣传我国煤

关键词：杂志煤炭科学 International Journal of Coal Science mining engineering

欢迎订阅2014年《International Journal of Coal Science & mining engineering》杂志

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煤炭学报 2013年第11期 1966-1966页

关键词：杂志煤炭科学 International Journal of Coal Science mining engineering

欢迎订阅2014年《International Journal of Coal Science & mining engineering》杂志

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煤炭学报 2013年第9期 1661-1661页

《International Journal of Coal Science&mining engineering》(《国际煤炭科学与采矿工程学报(英文版)》,简称JCSME)是由中国煤炭学会主办、面向国内外公开发行的英文版煤炭科学技术方面的综合性学术刊物。主要刊载煤田地质与勘探、... 详细信息

《International Journal of Coal Science&mining engineering》(《国际煤炭科学与采矿工程学报(英文版)》,简称JCSME)是由中国煤炭学会主办、面向国内外公开发行的英文版煤炭科学技术方面的综合性学术刊物。主要刊载煤田地质与勘探、煤矿开采、矿山测量、矿井建设、煤矿安全、煤矿机械工程、煤矿电气工程、煤炭加工利用、煤矿环境保护、煤炭经济研究等方面的科研成果和学术论文。

关键词：杂志煤炭科学 International Journal of Coal Science mining engineering