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| 1 | Experimental study on dynamic mechanical property of cemented tailings backfill under SHPB impact loading显示文摘Cemented tailings backfill(CTB) have increasingly been used in recent years to improve the stability of mining stopes in deep underground mines. Deep mining processes are often associated with rock bursting and high-speed dynamic loading conditions. Therefore, it is important to investigate the characteristics and dynamic mechanical behavior of CTB. This paper presents the results of dynamic tests on CTB specimens with different cement and solid contents using a split Hopkinson pressure bar(SHPB). The results showed that some CTB specimens exhibited one to two lower stress peaks after reaching dynamic peak stress before they completely failed. The greater the cement-to-tailings ratio is, the more obvious the strain reaction. This property mainly manifested as follows. First,the dynamic peak stress increased with the increase of the cement-to-tailings ratio when the impact velocity was fixed. Second, the dynamic peak stress had a quadratic relationship with the average stress rate. Third, the cement-to-tailings ratio could enhance the increase rate of dynamic peak stress with strain rate. In addition, the dynamic strength enhancement factor K increased with the increase of strain rate, and its value was larger than that of the rock samples. The failure modes of CTB specimens under low-speed impact were tensile failure and X conjugate shear failure, where were nearly the same as those under static uniaxial and triaxial compression. The CTB specimens were crushed and broken under critical strain, a failure mode similar to that of low-strength concrete. The results of the experimental research can improve the understanding of the dynamic mechanical properties of CTB and guide the strength design of deep mining backfills. | Yu-ye Tan Xin Yu Davide Elmo Lin-hui Xu Wei-dong Song | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，4： | 19 |
| 2 | Overhanging rock slope by design:An integrated approach using rock mass strength characterisation,large-scale numerical modelling and limit equilibrium methods显示文摘Overhanging rock slopes(steeper than 90°) are typically avoided in rock engineering design, particularly where the scale of the slope exceeds the scale of fracturing present in the rock mass. This paper highlights an integrated approach of designing overhanging rock slopes where the relative dimensions of the slope exceed the scale of fracturing and the rock mass failure needs to be considered rather than kinematic release of individual blocks. The key to the method is a simplified limit equilibrium(LE) tool that was used for the support design and analysis of a multi-faceted overhanging rock slope. The overhanging slopes required complex geometries with constantly changing orientations. The overhanging rock varied in height from 30 m to 66 m. Geomechanical modelling combined with discrete fracture network(DFN)representation of the rock mass was used to validate the rock mass strength assumptions and the failure mechanism assumed in the LE model. The advantage of the simplified LE method is that buttress and support design iterations(along with sensitivity analysis of design parameters) can be completed for various cross-sections along the proposed overhanging rock sections in an efficient manner, compared to the more time-intensive, sophisticated methods that were used for the initial validation. The method described presents the development of this design tool and assumptions made for a specific overhanging rock slope design. Other locations will have different geological conditions that can control the potential behaviour of rock slopes, however, the approach presented can be applied as a general guiding design principle for overhanging rock cut slope. | Paul Schlotfeldt Davide Elmo Brad Panton | 2018 | Journal of Rock Mechanics and Geotechnical Engineering2018，10，1： | 8 |
| 3 | Modelling of blast-induced damage in tunnels using a hybrid finite-discrete numerical approach显示文摘This paper presents the application of a hybrid finite-discrete element method to study blast-induced damage in circular tunnels. An extensive database of field tests of underground explosions above tunnels is used for calibrating and validating the proposed numerical method; the numerical results are shown to be in good agreement with published data for large-scale physical experiments. The method is then used to investigate the influence of rock strength properties on tunnel durability to withstand blast loads. The presented analysis considers blast damage in tunnels excavated through relatively weak(sandstone) and strong(granite) rock materials. It was found that higher rock strength will increase the tunnel resistance to the load on one hand, but decrease attenuation on the other hand. Thus, under certain conditions, results for weak and strong rock masses are similar. | Amichai Mitelman Davide Elmo | 2014 | Journal of Rock Mechanics and Geotechnical Engineering2014，6，6： | 7 |
| 4 | Characterizing the influence of stress-induced microcracks on the laboratory strength and fracture development in brittle rocks using a finite-discrete element method-micro discrete fracture network FDEM-μDFN approach显示文摘Heterogeneity is an inherent component of rock and may be present in different forms including mineral heterogeneity,geometrical heterogeneity,weak grain boundaries and micro-defects.Microcracks are usually observed in crystalline rocks in two forms:natural and stress-induced;the amount of stressinduced microcracking increases with depth and in-situ stress.Laboratory results indicate that the physical properties of rocks such as strength,deformability,P-wave velocity and permeability are influenced by increase in miciocrack intensity.In this study,the finite-discrete element method(FDEM)is used to model microcrack heterogeneity by introducing into a model sample sets of microcracks using the proposed micro discrete fracture network(μDFN) approach.The characteristics of the microcracks required to create μDFN models are obtained through image analyses of thin sections of Lac du Bonnet granite adopted from published literature.A suite of two-dimensional laboratory tests including uniaxial,triaxial compression and Brazilian tests is simulated and the results are compared with laboratory data.The FDEM-μDFN models indicate that micro-heterogeneity has a profound influence on both the mechanical behavior and resultant fracture pattern.An increase in the microcrack intensity leads to a reduction in the strength of the sample and changes the character of the rock strength envelope.Spalling and axial splitting dominate the failure mode at low confinement while shear failure is the dominant failure mode at high confinement.Numerical results from simulated compression tests show that microcracking reduces the cohesive component of strength alone,and the frictional strength component remains unaffected.Results from simulated Brazilian tests show that the tensile strength is influenced by the presence of microcracks,with a reduction in tensile strength as microcrack intensity increases.The importance of microcrack heterogeneity in reproducing a bi-linear or S-shape failure envelope and its effects on the mechanisms leading to spalling damage near an underground opening are also discussed. | Pooya Hamdi Doug Stead Davide Elmo | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，6： | 6 |
| 5 | Long-term mechanical behavior and characteristics of cemented tailings backfill through impact loading显示文摘Cemented tailings backfill(CTB)structures are important components of underground mine stopes.It is important to investigate the characteristics and dynamic behavior of CTB materials because they are susceptible to disturbance by dynamic loading,such as excavation and blasting.In this study,the authors present the results of a series of Split-Hopkinson pressure bar(SHPB)single and cyclic impact loading tests on CTB specimens to investigate the long-term dynamic mechanical properties of CTB.The stress-strain relationship,dynamic strength,and dynamic failure characteristics of CTB specimens are analyzed and discussed to provide valuable conclusions that will improve our knowledge of CTB long-term mechanical behavior and characteristics.For instance,the dynamic peak stress under cyclic impact loading is approximately twice that under single impact loading,and the CTB specimens are less prone to fracture when cyclically loaded.These findings and conclusions can provide a new set of references for the stability analysis of CTB materials and help guide mine designers in reducing the amount of binding agents and the associated mining cost. | Yu-ye Tan Elmo Davide Yu-cheng Zhou Wei-dong Song Xiang Meng | 2020 | International Journal of Minerals,Metallurgy and Materials2020，27，2： | 6 |
| 6 | 多器官床旁即时超声在新型冠状病毒肺炎中的应用:国际专家共识显示文摘新型冠状病毒肺炎(简称新冠肺炎,COVID-19)自首次报道以来,已造成全球超一亿人感染,给各国的公共卫生体系造成了巨大威胁。新冠肺炎的临床表现以呼吸系统体征和症状为主,80%的患者症状轻微,约5%为危重症患者,常表现为急性呼吸窘迫综合征(ARDS)。前期,由于缺乏相关研究,面对日益紧迫的临床困境,医务人员不得不借鉴采取一些经验性措施以应对疫情。 | 王臻(译) Arif Hussain Gabriele Via Lawrence Melniker Alberto Goffi Guido Tavazzi Luca Neri Tomas Villen Richard Hoppmann Francesco Mojoli Vicki Noble Laurent Zieleskiewicz Pablo Blanco Irene W.Y.Ma Mahathar Abd.Wahab Abdulmohsen Alsaawi Majid AI Salamah Martin Balik Diego Barca Karim Bendjelid Belaid Bouhemad Pablo Bravo-Figueroa Raoul Breitkreutz Juan Calderon Jim Connolly Roberto Copetti Francesco Corradi Anthony J.Dean AndréDenault Deepak Govil Carmela Graci Young-Rock Ha Laura Hurtado Toru Kameda Michael Lanspa Christian B Laursen Francis Lee Rachel Liu Massimiliano Meineri Miguel Montorfano Peiman Nazerian Bret P.Nelson Aleksandar N.Neskovic Ramon Nogue Adi Osman JoséPazeli Elmo Pereira-Junior Tomislav Petrovic Emanuele Pivetta Jan Poelaert Susanna Price Gregor Prosen Shalim Rodriguez Philippe Rola Colin Royse Yale Tung Chen Mike Wells Adrian Wong Wang Xiaoting Wang Zhen Yaseen Arabi | 2021 | 中国呼吸与危重监护杂志2021，20，2： | 5 |
| 7 | 高水力条件下深部砂岩的强度与储能交互特征显示文摘为了研究围压和孔隙水压对深部砂岩强度特征、储能状态和峰值破坏时能量释放烈度的影响规律,开展一系列水力耦合条件下的三轴压缩试验。通过分析岩石变形破坏过程,获得其应力阈值。利用图形积分方法获得深部砂岩在峰前阶段总能量密度、弹性能量密度、耗散能量密度的变化趋势。对比不同围压下岩石的动态储能水平,分析孔隙水压对岩石闭合应力、起裂应力、损伤应力、峰值应力等应力阈值处能量耗散的影响。基于峰前、后总能量密度的比值,研究围压与孔隙水压对深部砂岩岩爆倾向性的相互作用机理。实验结果表明,砂岩峰值应力随着围压的增加而增加,而孔隙水压的存在可以削弱砂岩的峰值应力。在自闭合应力至峰值应力间的应力阶段,岩石的动态储能水平呈现出反“对勾”的演化趋势。同时随着围压的增加,动态储能水平上升。然而,孔隙水压增大岩石的能量耗散程度,降低岩石的储能能力,耗散程度与孔隙水压呈线性关系。围压的增大加剧深部砂岩的失稳破坏现象,而孔隙水压具有相反作用。研究成果将为高应力、高孔隙水压下砂岩地层工程岩体开挖稳定性分析提供有力的数据支撑。 | 李飞 由爽 纪洪广 ELMO Davide 王洪涛 | 2020 | Journal of Central South University2020，27，10： | 4 |
| 8 | 基于“中外教师组合”的采矿工程专业英语教学探索显示文摘中国矿业大学采矿工程专业近年来开展了专业英语中外教师结合教学的探索研究工作。本文介绍了'现代采矿技术'双语课程的教学目标与定位,以拓宽国际化视野、强化基础知识、提高国际交流能力为出发点的课程教学内容。结合以往双语课程开设及讲授的经验,提出了中外教师相结合、以渐进型为主和'两点一线'式的课程教学模式,最终使学生成为基础知识扎实且具有国际视野和国际交流能力的国际采矿人。 | 闫帅 李桂臣 Davide Elmo 阚甲广 | 2018 | 科教文汇2018，，13： | 4 |
| 9 | Impact of Emergency Angiography in Massive Lower Gastrointestinal Bleeding显示文摘 | WILLIAM BROWDER ELMO J. CERISE MARTIN S. LITWIN | 1986 | Annals of Surgery1986，，5： | 2 |
| 10 | Development of a spring analogue approach for the study of pillars and shafts显示文摘In civil and mining operations that involve ground excavation and support, the loads are distributed between the ground and support depending on their relative stiffness. This paper presents the development of conceptual single-degree-of-freedom models, which are used to derive equations for estimating displacements and stresses for ground-support interaction problems encountered in pillars in room-andpillar mining(natural support system), and liners for circular vertical shafts(artificial support systems).For pillar assessment, mine-pillar interaction curves can be constructed using a double spring analogy.Additionally, the effectiveness of different support systems can be evaluated depending on their effect upon the mine-pillar system. For shaft design, an initial estimation of the required lining strength and thickness can be readily made based on a double ring analogue. For both problems, the results from the proposed approach compare well with those obtained by finite element numerical simulations. | Amichai Mitelman Davide Elmo Doug Stead | 2018 | International Journal of Mining Science and Technology2018，28，2： | 2 |
| 11 | 切近位关键层卸压沿空掘巷关键参数与工程应用显示文摘以马家岩煤矿40103回风巷(沿空掘巷)为背景,采用理论分析、数值模拟和工程实践等方法研究切顶卸压沿空掘巷关键参数等问题。结果表明:关键层位于4~8倍采高范围时为近位关键层,位于4~8倍采高范围外时为远位关键层;掘进期间在块体A(悬臂结构)下完成;切角垂直于顶板时卸压效果最好,有利于岩块C_(i)的滑落,但倒梯形切顶结构更有利于超前巷道顶板稳定,选取75°为切顶角度;切顶长度越深卸压效果越好,超过关键层后,再增加切长,支承压力继续降低但降低幅度逐渐减小。通过对比切顶(切长20 m,角度75°)与不切顶条件下不同煤柱宽度支承压力,可发现:实体煤侧支承压力依然呈“单峰”状分布,大煤柱(>10 m)上支承压力呈非对称“马鞍”状分布,小煤柱(<10 m)支承压力呈“钟形”分布,切顶可降低支承压力峰值,但不改变其位置。炮孔间距不大于爆破裂隙损伤半径的2倍,可根据现场及时调整。最终确定护巷煤柱宽度8 m,切顶长度20 m,角度75°,炮孔间距1.0 m,支护方案为锚杆+金属网+钢带+锚索补强联合支护。掘进期间两帮相对位移量156 mm,顶板下沉量186 mm,底鼓量101 mm;10 d左右实现自稳;回采期间两帮相对最大移近速度42 mm/d,顶板最大下沉速度47 mm/d,底鼓最大速度63 mm/d。 | 许磊 李明伟 郭亮 肖同强 刘洪林 DAVIDE Elmo | 2023 | 采矿与安全工程学报2023，40，1： | 2 |
| 12 | Final analysis of the pilot trial of diaphragm pacing in amyotrophic lateral sclerosis with long-term follow-up:diaphragm pacing positively affects diaphragmrespiration显示文摘 | Onders RP Elmo M Kaplan C | 2014 | Am J Surg2014，207，3： | 1 |
| 13 | Large-artery stiffness: A reversible marker of cardiovascular risk in primary hyperparathyroidism显示文摘 | Giuseppe Schillaci Giacomo Pucci Matteo Pirro Massimo Monacelli Anna Maria Scarponi Maria Rosaria Manfredelli Fabio Rondelli Nicola Avenia Elmo Mannarino | 2011 | Atherosclerosis2011，，1： | 1 |
| 14 | Extended use of diaphragm pacing in patients with unilateral or bilateral diaphragm dysfunction:a new therapeutic option显示文摘 | Onders RP Elmo M Kaplan C | 2014 | Surgery2014，156，4： | 1 |
| 15 | Aortic Stiffness in Untreated Adult Patients With Human Immunodeficiency Virus Infection显示文摘 | Giuseppe Schillaci Giuseppe V.L. De Socio Giacomo Pucci Massimo R. Mannarino Johny Helou Matteo Pirro Elmo Mannarino | 2008 | Hypertension2008，，2： | 1 |
| 16 | Inatrumentational techniques and equipmentused to monitor the performance of Norwegian Embankment Dams显示文摘 | DiBiagio Elmo Myrvoll Frank | 1986 | Publikasjon - NorgesGeotekniske Institutt1986，165，： | 1 |
| 17 | Effective Reduction of Brown Fat FDG Uptake by Controlling Environmental Temperature Prior to PET Scan: an Expanded Case Series显示文摘 | Carlos Garcia Varalakshmi Bandaru Douglas Nostrand Shyam Chennupati Frank Atkins Elmo Acio Kanchan Kulkarni Massoud Majd | 2010 | Molecular Imaging and Biology2010，，6： | 1 |
| 18 | Complete worldwide operative experience in laparoscopic diaphragm pacing:results and differences in spinal cord injured patients and amyotrophic lateral sclerosis patients显示文摘 | Onders RP Elmo M Khansarinia S | 2009 | Surg Endosc2009，23，7： | 1 |
| 19 | Prognostic value of the metabolic syndrome in essential hypertension显示文摘 | Giuseppe Schillaci Matteo Pirro Gaetano Vaudo Fabio Gemelli Simona Marchesi Carlo Porcellati Elmo Mannarino | 2004 | Journal of the American College of Cardiology2004，，10： | 1 |
| 20 | Relation Between Renal Function Within the Normal Range and Central and Peripheral Arterial Stiffness in Hypertension显示文摘 | Giuseppe Schillaci Matteo Pirro Massimo R. Mannarino Giacomo Pucci Gianluca Savarese Stanley S. Franklin Elmo Mannarino | 2006 | Hypertension2006，，4： | 1 |
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