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International Journal of mining Science and Technology 2023年第5期33卷 555-571页

作者： Alberto Fernández JoséA.Sanchidrián Pablo Segarra Santiago Gómez Enming Li Rafael Navarro Universidad Politécnica de Madrid–ETSI Minas y Energía Spain Universidad de Salamanca–GIR Charrock Spain

A procedure to recognize individual discontinuities in rock mass from measurement while drilling(MWD)technology is developed,using the binary pattern of structural rock characteristics obtained from in-hole images for *** from two underground operations with different drilling technology and different rock mass characteristics are considered,which generalizes the application of the methodology to different sites and ensures the full operational integration of MWD data *** approaches are followed for site-specific structural model building:a discontinuity index(DI)built from variations in MWD parameters,and a machine learning(ML)classifier as function of the drilling parameters and their *** prediction ability of the models is quantitatively assessed as the rate of recognition of discontinuities observed in borehole *** between the parameters involved in the models for each site,and differences in their weights,highlight the site-dependence of the resulting *** ML approach offers better performance than the classical DI,with recognition rates in the range 89%to 96%.However,the simpler DI still yields fairly accurate results,with recognition rates 70%to 90%.These results validate the adaptive MWD-based methodology as an engineering solution to predict rock structural condition in underground mining operations.

关键词： Drill monitoring technology Rock mass characterization underground mining Similarity metrics of binary vectors Structural rock factor Machine learning

European legal framework related to underground mining and tunnelling concerning commission directive (EU) 2017/164, 31 January establishing a fourth list of indicative occupational exposure limit values

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International Journal of mining Science and Technology 2020年第4期30卷 541-545页

作者： Miguel Tato Diogo Department of mining Engineering Faculty of EngineeringUniversity of PortoPorto 4200-465Portugal

Directive(EU)2017/164 establishes a fourth list of indicative occupational exposure limit values(IOELVs)to protect workers from risks of exposure to hazardous *** states that in underground mining and tunnelling,Member States may benefit from a transitional period regarding IOELVs for nitrogen monoxide,nitrogen dioxide,and carbon monoxide,during which the existing established IOELVs may be *** European Advisory Committee on Health and Safety at Work questions the technical feasibility of the proposed IOELVs in underground mining(CO,NO and NO2)and tunnelling(NO and NO2).Challenges arise concerning the availability of measurement methodologies for compliance with proposed IOELVs(NO2)in underground mining and tunnelling environments.

关键词： Nitrogen monoxide Nitrogen dioxide Carbon monoxide IOELVs European Directive 2017/164 underground mining Tunnelling

Designing an optimal stope layout for underground mining based on a heuristic algorithm

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International Journal of mining Science and Technology 2015年第5期25卷 767-772页

作者： Sandanayake Don Suneth Sameera Topal Erkan Asad Mohammad Waqar Ali mining Engineering Western Australian School of MinesCurtin University

An optimal layout or three-dimensional spatial distribution of stopes guarantees the maximum profitability over life span of an underground mining ***,stope optimization is one of the key areas in underground mine planning ***,the computational complexity in developing an optimal stope layout has been a reason for limited availability of the algorithms offering solution to this *** article shares a new and efficient heuristic algorithm that considers a three-dimensional ore body model as an input,maximizes the economic value,and satisfies the physical mining and geotechnical constraints for generating an optimal stope *** implementation at a copper deposit demonstrates the applicability and robustness of the algorithm.A parallel processing based modification improving the performance of the original algorithm in terms of enormous computational time saving is also presented.

关键词： Stope optimization underground mining underground mine planning Heuristic algorithm

Evaluation of the impact of commodity price change on mine plan of underground mining

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International Journal of mining Science and Technology 2015年第3期25卷 375-382页

作者： Salama Abubakary Nehring Micah Greberg Jenny Division of mining and Geotechnical Engineering Department of CivilMining and Environmental EngineeringLulea University of Technology School of Mechanical and mining Engineering The University of Queensland

Fluctuations in commodity prices should influence mining operations to continually update and adjust their mine plans in order to capture additional value under new market conditions. One of the adjustments is the change in production sequencing. This paper seeks to present a method for quantifying the net present value(NPV) that may be directly attributed to the change in commodity prices. The evaluation is conducted across ten copper price scenarios. Discrete event simulation combined with mixed integer programming was used to attain a viable production strategy and to generate optimal mine plans. The analysis indicates that an increase in prices results in an increased in the NPV from$96.57M to $755.65M. In an environment where mining operations must be striving to gain as much value as possible from the rights to exploit a finite resource, it is not appropriate to keep operating under the same mine plan if commodity prices alter during the course of operations.

关键词： Mine planning underground mining Commodity price Discrete event simulation Mixed integer programming

Semi-real time systems for subsidence monitoring in areas affected by underground mining:the example of the Nuraxi-Figus coal district(Sardinia,Italy)

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International Journal of Coal Science & Technology 2022年第6期9卷 112-126页

作者： L.Ammirati D.Di Martire F.Bordicchia D.Calcaterra G.Russo N.Mondillo Department of Earth Sciences Environment and ResourcesUniversity of NaplesFedericoⅡ80126 NaplesItaly Department of Earth Sciences Natural History MuseumLondon SW75BDUK Sardinia Region Company Carbosulcis S.P.A. 09010 GonnesaCIItaly

underground mining can produce subsidence,which can be coincident with mining activities or delayed in response to the time-dependent deformation of the ***,in these cases,it is essential to effectively monitor the soil deformations at different times during and after mining *** the present work,an integrated approach based on geotechnical numeri-cal modeling and Advanced Differential Interferometric Synthetic Aperture Radar(A-DInSAR)method has been applied to detect,study and monitor the subsidence related to mining activity in the Nuraxi Figus coal district(Sardinia,Italy).Two datasets of high-resolution COSMO-Skymed images were acquired,respectively in two covering periods:from 2011 and 2014,and from 2013 to ***-DInSAR results show that the predominant displacement rates are located in correspond-ence with the *** cumulated satellite-based LoS displacements vary in the first period between-130 and+28 mm and-293 and+28.4 mm,while,during the second period between-6.9 and+1.6 mm and-8.72 and+4.33 mm in ascend-ing and descending geometries,*** geotechnical numerical model allowed to obtain a value for the maximum *** using the vertical and horizontal components it was possible to reconstruct the kinematics of the deformation considering three phases:pre-mining,syn-mining,and post-mining *** temporal evolution of displacements started during the mining extraction in 2011,achieved the major values in correspondence of post-mining operations,during the period from 2013 to 2014 and continued slowly until *** near real-time monitoring system applied in this study proved to be very useful for detecting subsidence during the mining activity and the post-mining period.

关键词： mining monitoring A-DInSAR Numerical modeling Subsidence underground mining

Stability of boundary pillars in transition from open pit to underground mining

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Journal of Central South University 2012年第11期19卷 3256-3265页

作者：赵兴东李连崇唐春安张洪训 College of Resources&Civil Engineering Northeastern University State Key Laboratory for Geomechanics&Deep underground Engineering(Chinese University of mining and Technology) School of Civil Engineering Dalian University of Technology

Based on the height of back-filled materials, thickness of ore body, height of boundary pillar and dipping angle of ore body and water pressure, the safety factors of all the pillars are calculated with the limit equilibrium method. The calculation results present that the safety factors of pillars in Sections 19, 20, 24, 28 are less than 1.3, and those of unstable sections are identified preliminarily. Further, a numerical investigation in Sections 18, 20, 22, 24, 25 and 28 implemented with numerical code RFPA20 is employed to further validate the pillar performance and the stability of stopes. The numerical results show the pillars in Sections 18, 22 and 24 are stable and the designed pillar size is suitable. The width of the ore body near Section 28 averages 20 m, failure occurs in the left stope, but the boundary pillars near Section 28 maintain good performance. The pillars in Sections 20 and 25 are unstable which are mainly affected by the Faults F8 and F18. The existence of faults alters the stress distribution, failure mode and water inrush pathway. This work provides a meaningful standard for boundary pillar and stope design in a mine as it transitions from an open pit to underground.

关键词： boundary pillar stability underground mining numerical simulation case study

Research on stability of a slope due to underground mining

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Journal of Coal Science & Engineering(China) 2013年第4期19卷 474-482页

作者： Hong-Jie LI Hui-Ya ZHONG Wei-Chao LI Mine Safety Technology Branch China Coal Research Institute Beijing 100013 China State Key Laboratory of Coal mining and Clean Utilization (China Coal Research Institute) Beijing 100013 China Mid-South Design and Research Institute CHEC Changsha 410014 China China Institute of Water Resources and Hydropower Research Beijing 100048 China

This paper will present a detailed analysis of the deformation mechanism and stability assessment of the slope through field investigations, numerical modeling and measurements. Field investigation indicated that three thin coal seams encountered large mined-out area at one side and free surface of hill slope at the other side, which lead to the caving of roof strata movement, ground movement and crown crack along the preferred orientations of joints. The three-dimensional numeri- cal modeling study on the case demonstrated that the plasticity failure occurred gradually along with the extension of mined-out area in depth. When the depth of mining reached the verge defined by the seismic prospecting method, a large mount of tension failure occurred on the crown of the slope. The factor of safety was 1.36 calculated by the shear strength reduction technique, which indicated the slope was in stable state. The measurement showed that the residual deformation occurred before 1998 and became stable subsequently, which indicated that the residual deformation almost finished and the slope is in stable state.

关键词： underground mining stability of slope numerical modeling strength reduction technique monitoring

Research on mechanism of mountain landslide due to underground mining

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Journal of Coal Science & Engineering(China) 2009年第4期15卷 351-354页

作者： TANG Fu-quan College of Geomatics Xi＇an University of Science and Technology Xi＇an 710054 China

The basics of mining landslides were first summed up based on the analysis ofactual materials by the application of mining subsidence and landslide theories. Further,the mechanism of along-layer landslide by mining was studied with the example of theXiangshan mining landslide at Hancheng, Shaanxi Province. Meanwhile, the state ofstress, and the mechanism of deformation and destruction of the Xiangshan mining slopewere analyzed by the Finite Element Method.

关键词： mountain landslide underground mining stability of slope mechanism of landslide weak intercalated bed

Effects of Sublevel Open Stope underground mining on Surface and Open Pit Slopes

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Journal of Geoscience and Environment Protection 2021年第1期9卷 121-131页

作者： Tumelo K. M. Dintwe Takashi Sasaoka Hideki Shimada Akihiro Hamanaka Dyson Moses Sifei Liu Fanfei Meng Department of Earth Resources Engineering Kyushu University Fukuoka Japan China University of Science and Technology Xuzhou China

underground mining is an economically viable option for exploiting ore reserves deemed uneconomic after open pit mining. However, underground development can have adverse effects on the above existing open pit slope walls. As a goal of this paper, identification and assessment of potential slope instabilities prior to underground development is crucial for safe and sustainable mining. Towards goal achieving, this paper gives a comprehensive parametric study to investigate the influence of sublevel open stope (SLOS) underground mining on the surface and open pit slope walls. By means of numerical simulation, the SLOS design is tried against the existing open pit followed by adjustments of important slope parameters which are overall slope height (OSH) and overall slope angle (OSA). We found that underground mining may induce slope failure, particularly on the hangingwall side of the pit. Subsidence is prominent on the hanging wall and the surface, whereas, the uplift dominates the footwall and pit bottom. Pit wall closure is observed during underground mining. Although the assigned dimensions in the parametric study show a negligible effect of OSH and OSA, the high OSH experience low subsidence in comparison with low OSH. Overall, the results demonstrate that the slope walls on the hanging wall side are mostly affected by the underground mining and high-stress concentration prevails near slope toes and pit bottom. Additionally, slope deformation decrease from pit bottom towards the slope crest and surface. The results of this study add knowledge to open pit and underground mining interaction.

关键词： Open Pit-underground Interaction Slope Stability underground mining Subsidence

Research progress and prospects of intelligent technology in underground mining of hard rock mines

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Green and Smart mining Engineering 2024年第1期1卷 12-26页

作者： Xiaobo Liu Xingfan Zhang Liancheng Wang Fuming Qu Anlin Shao Lingyu Zhao Huaiyuan Wang Xingtong Yue Yizhuo Li Wenzhen Yan Jiang He School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Insttute of Minerals Research University of Science and Technology BeijingBeijing 100083China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110169China Ansteel Beijing Research Institute Co. LtdBeijing 102209China Department of mining and Materials Engineering McGll UniversityMontreal H3A OE8Canada

Minerals are the material foundation for advancing human civilization,the starting point of the manufacturing supply chain,and strategic resources essential for national security and economic *** recent years,deep learning and big data have strongly supported improving mining efficiency and safety in underground hard rock *** this backdrop,this paper focuses on the production processes and vital auxiliary aspects of underground mining in hard rock *** delves into six aspects:driling,blasting,transportation,hoisting,ventilation,and support and *** paper elaborates on the latest advancements in intelligent technology research for each aspect and provides a summary and outlook on the key technologies relevant to these *** results show that the current intelligent technology used in underground mining not only improves production efficiency but also further improves the safety production level of mining *** achieve intelligent unmanned mining,bottleneck problems in each primary process must be further addressed.

关键词： Hard rock mines underground mining Intelligent mining Intelligent sensing Fault diagnosis Smart monitoring