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| 1 | 煤矿硫化氢气体成因类型探讨显示文摘在对国内外硫化氢成因研究及同位素研究分析对比的基础上,提出了煤矿硫化氢形成的硫酸盐生物还原(BSR)、热化学硫酸盐还原(TSR)和岩浆作用三大成因类型及其识别特征。对煤层H2S生物化学降解及热解成因进行了讨论,分析了煤层H2S的富集规律,并对国内外一些H2S矿井的成因类型进行了分析归类,提出了煤岩层H2S气体的研究方向。 | 刘明举 李国旗 HANI Mitri 刘彦伟 邓奇根 赵发军 | 2011 | 煤炭学报2011，36，6： | 77 |
| 2 | Machine learning methods for rockburst prediction-state-of-the-art review显示文摘One of the most serious mining disasters in underground mines is rockburst phenomena.They can lead to injuries and even fatalities as well as damage to underground openings and mining equipment.This has forced many researchers to investigate alternative methods to predict the potential for rockburst occurrence.However,due to the highly complex relation between geological,mechanical and geometric parameters of the mining environment,the traditional mechanics-based prediction methods do not always yield precise results.With the emergence of machine learning methods,a breakthrough in the prediction of rockburst occurrence has become possible in recent years.This paper presents a state-ofthe-art review of various applications of machine learning methods for the prediction of rockburst potential.First,existing rockburst prediction methods are introduced,and the limitations of such methods are highlighted.A brief overview of typical machine learning methods and their main features as predictive tools is then presented.The current applications of machine learning models in rockburst prediction are surveyed,with related mechanisms,technical details and performance analysis. | Yuanyuan Pu Derek B.Apel Victor Liu Hani Mitri | 2019 | International Journal of Mining Science and Technology2019，29，4： | 19 |
| 3 | Role of osteoprotegerin/receptor activator of nuclear factor kappa B/receptor activator of nuclear factor kappa B ligand axis in nonalcoholic fatty liver disease显示文摘Concomitantly with the increase in the prevalences of overweight/obesity, nonalcoholic fatty liver disease(NAFLD) has worldwide become the main cause of chronic liver disease in both adults and children. Patients with fatty liver display features of metabolic syndrome(Met S), like insulin resistance(IR), glucose intolerance, hypertension and dyslipidemia. Recently, epidemiological studies have linked obesity, Met S, and NAFLD to decreased bone mineral density and osteoporosis, highlighting an intricate interplay among bone, adipose tissue, and liver. Osteoprotegerin(OPG), an important symbol of the receptor activator of nuclear factor-B ligand/receptor activator of nuclear factor kappa B/OPG system activation, typically considered for its role in bone metabolism, may also play critical roles in the initiation and perpetuation of obesityrelated comorbidities. Clinical data have indicated that OPG concentrations are associated with hypertension, left ventricular hypertrophy, vascular calcification, endothelial dysfunction, and severity of liver damage in chronic hepatitis C. Nonetheless, the relationship between circulating OPG and IR as a key feature of Met S as well as between OPG and NAFLD remains uncertain. Thus, the aims of the present review are to provide the existent knowledge on these associations and to discuss briefly the underlying mechanisms linking OPG and NAFLD. | Lucia Pacifico Gian Marco Andreoli Miriam D'Avanzo Delia De Mitri Pasquale Pierimarchi | 2018 | World Journal of Gastroenterology2018，24，19： | 11 |
| 4 | Constitutive model for methane desorption and diffusion based on pore structure differences between soft and hard coal显示文摘This paper aims to improve the accuracy and applicability of gas diffusion mathematical models from coal particles. Firstly, a new constitutive model for gas diffusion from coal particles with tri-disperse pore structure is constructed by considering the difference in characteristics between soft coal and hard coal.The analytical solution is then derived, that is, the quantitative relationship between gas diffusion rate(Qt/Q_∞) and diffusion time(t), The pore structure parameters of soft coal and hard coal from Juji coal mine are determined. Gas diffusion rules are numerically calculated and investigated by physical simulation methods. Lastly, the applicability of this model is verified. The results show that the homogeneous model only applies to the gas diffusion process of hard coal during the initial 10 min. The calculation results from this model and the physical experimental results of soft coal and hard coal are nearly identical during the initial 30 min. | Liu Yanwei Wang Dandan Hao Fuchang Liu Mingju Mitri Hani S. | 2017 | International Journal of Mining Science and Technology2017，27，6： | 8 |
| 5 | Probabilistic assessment of rock slopes stability using the response surface approach——A case study显示文摘This paper examines the stability condition of a jointed rock slope in the south western region of Saudi Arabia using deterministic and probabilistic approaches,under both dry and wet conditions.The study area is characterized by complex geology in rugged terrains.The stability analysis is carried out using the code FLAC3D to generate a 3-dimensional,ubiquitous joint model,to determine the influence of the dominant,unfavourable discontinuity orientation with respect to the slope face.The deterministic analysis is first implemented using the mean values of the selected random variables,namely the dip,dip direction and friction angle of the dominant discontinuity set,and the stability condition is assessed with a factor of safety based on the classical frictional joint constitutive model.A Box-Behnken design(BBD)approach is then adopted to create the surface response function as a second order polynomial for the factor of safety.To do so,fifteen FLAC3D models are generated in accordance with the BBD.Based on this,10,000 simulations of different slope realizations are carried out using Monte-Carlo simulation technique,and the probability of unsatisfactory of performance of the rock slope is assessed.It is shown that the probabilistic approach provides more insight and confidence in the stability condition of the rock slope,both under dry and steady state heavy rainfall conditions.A discussion is presented on the significance of accepting lower safety factors when heavy rainfall conditions are encountered. | Hassan Basahel Hani Mitri | 2019 | International Journal of Mining Science and Technology2019，29，3： | 7 |
| 6 | Numerical investigation into pillar failure induced by time-dependent skin degradation显示文摘This paper focuses on the instability mechanism of an isolated pillar, caused by time-dependent skin degradation and strength heterogeneity. The time-dependent skin degradation is simulated with a non-linear rheological model capable of simulating tertiary creep, whereby two different pillar failure cases are investigated. The first case is of an isolated pillar in a deep hard rock underground mine and subjected to high stresses. The results show that pillar degradation is limited to the regions near the surface or the skin until two months after ore extraction. Afterwards degradation starts to extend deeper into the pillar, eventually leaving a highly-stressed pillar core due to stress transfer from the failed skin.Rockburst potential indices show that the risk increases exponentially at the core as time goes by. It is then demonstrated that the progressive skin degradation cannot be simulated with conventional strain-softening model assuming brittle failure. The parametric study with respect to the degree of heterogeneity reveals that heterogeneity is key to the occurrence of progressive skin degradation. The second case investigated in this study is pillar failure taking place in a very long period. Such failure becomes significantly important when assessing the risk for ground subsidence caused by pillar collapse in an abandoned mine. The analysis results demonstrate that the employed non-linear rheological model can simulate gradual skin degradation taking place over several hundred years. The percentage of damage zone volume within the pillar is merely 1% after a lapse of one days and increases to 50% after one hundred years, indicating a high risk for pillar collapse in the long term. The vertical displacements within the pillar also indicate the risk of subsidence. The proposed method is suitable for evaluating the risk of ground surface subsidence above an abandoned mine. | Sainoki Atsushi Mitri Hani S. | 2017 | International Journal of Mining Science and Technology2017，27，4： | 7 |
| 7 | A rapid and accurate direct measurement method of underground coal seam gas content based on dynamic diffusion theory显示文摘Coal seam gas content is frequently measured in quantity during underground coal mining operation and coalbed methane(CBM)exploration as a significant basic parameter.Due to the calculation error of lost gas and residual gas in the direct method,the efficiency and accuracy of the current methods are not inadequate to the large area multi-point measurement of coal seam gas content.This paper firstly deduces a simplified theoretical dynamic model for calculating lost gas based on gas dynamic diffusion theory.Secondly,the effects of various factors on gas dynamic diffusion from coal particle are experimentally studied.And sampling procedure of representative coal particle is improved.Thirdly,a new estimation method of residual gas content based on excess adsorption and competitive adsorption theory is proposed.The results showed that the maximum error of calculating the losing gas content by using the new simplified model is only 4%.Considering the influence of particle size on gas diffusion law,the particle size of the collected coal sample is below 0.25 mm,which improves the measurement speed and reflects the safety representativeness of the sample.The determination time of gas content reduced from 36 to 3 h/piece.Moreover,the absolute error is 0.15–0.50 m^3/t,and the relative error is within 5%.A new engineering method for determining the coal seam gas content is developed according to the above research. | Yanwei Liu Yang Du Zhiqiang Li Fajun Zhao Weiqin Zuo Jianping Wei Hani Mitri | 2020 | International Journal of Mining Science and Technology2020，30，6： | 6 |
| 8 | Voussoir beam model for lower strong roof strata movement in longwall mining - Case study显示文摘The paper presents the influence of varying immediate roof thickness on the lower strong roof strata movement and failure pattern in longwall coal mining with large mining height. The investigation is based on 58 geological drill holes and hydraulic shield pressure measurements around the longwall Panel 42105 of the Buertai Mine in Inner Mongolia Autonomous Region, China. The longwall Panel 42105 is characterized by relatively soft immediate roof strata of varying thickness superposed by strong strata,herein defined as lower strong roof. A voussoir beam model is adopted to interpret the structural movement of the lower strong roof strata and shield pressure measurements. It is shown that when the immediate roof is relatively thick, the broken overlying lower strong roof tends to form a stable voussoir beam with previously broken layer, thus not exerting high pressure on the hydraulic shield and working face. When the immediate roof is relatively thin, the broken overlying lower strong roof tends to behave as a cantilever beam, thus exerting higher pressure on the hydraulic shield and working face. Comparison of model predictions with measured time-weighted average shield pressure(TWAP) shows good agreement. | Chuang Liu Huamin Li Hani Mitri Dongjie Jiang Huigui Li Junfa Feng | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，6： | 5 |
| 9 | Large-scale destress blasting for seismicity control in hard rock mines:A case study显示文摘Destress blasting is a rockburst control technique where highly stressed rock is blasted to reduce the local stress and stiffness of the rock,thereby reducing its burst proneness.The technique is commonly practiced in deep hard rock mines in burst prone developments,as well as in sill or crown pillars which become burst-prone as the orebody is extracted.Large-scale destressing is a variant of destress blasting where panels are created parallel to the orebody strike with a longhole,fanning blast pattern from cross cut drifts situated in the host rock.The aim of panel destressing is to reduce the stress concentration in the ore blocks or pillars to be mined.This paper focuses on the large-scale destress blasting program conducted at Vale's Copper Cliff Mine(CCM)in Ontario,Canada.The merits of panel destressing are examined through field measurements of mining induced stress changes in the pillar.The destressing mechanism is simulated with a rock fragmentation factor(a)and stress reduction/dissipation factor(b).A 3D model is built and validated with measured induced stress changes.It is shown that the best correlation between the numerical model and field measurements is obtained when the combination of a and b indicates that the blast causes high fragmentation(a=0.05)and high stress release(b=0.95)in the destress panel.It is demonstrated that the burst proneness of the ore blocks in the panel stress shadow is reduced in terms of the brittle shear ratio(BSR)and the burst potential index(BPI). | Isaac Vennes Hani Mitri Damodara Reddy Chinnasane Mike Yao | 2020 | International Journal of Mining Science and Technology2020，30，2： | 5 |
| 10 | Application of rock mass classification systems to rock slope stability assessment:A case study显示文摘The stability of rock slopes is considered crucial to public safety in highways passing through rock cuts, as well as to personnel and equipment safety in open pit mines. Slope instability and failures occur due to many factors such as adverse slope geometries, geological discontinuities, weak or weathered slope materials as well as severe weather conditions. External loads like heavy precipitation and seismicity could play a significant role in slope failure. In this paper, several rock mass classification systems developed for rock slope stability assessment are evaluated against known rock slope conditions in a region of Saudi Arabia, where slopes located in rugged terrains with complex geometry serve as highway road cuts. Selected empirical methods have been applied to 22 rock cuts that are selected based on their failure mechanisms and slope materials. The stability conditions are identified, and the results of each rock slope classification system are compared. The paper also highlights the limitations of the empirical classification methods used in the study and proposes future research directions. | Hassan Basahel Hani Mitri | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，6： | 4 |
| 11 | Efficacy and safety of endoscopic papillary balloon dilation for the removal of bile duct stones: Data from a “real-life” multicenter study on Dilation-Assisted Stone Extraction显示文摘AIM To report data on Dilation-Assisted Stone Extraction(DASE) use in clinical practice and its efficacy and safety trough three Italian referral centers for biliopancreatic diseases treatment. METHODS From January 2011 to December 2015 we collected data on 120 patients treated with DASE. Technical success was obtained when the endoscopist was able to place the balloon trough the papilla inflating the balloon until the final diameter for an adequate time(at least 30 s). Clinical success was obtained after complete stone removal(no remaining stones were visible at the cholangiogram).RESULTS Forty-nine male(40.8%) and 71 female(59%) were enrolled. The mean age was 67.8 years ± 15.7. The mean common bile duct(CBD) dilation was 19.2 mm± 3.9 and the mean size of stones 15.8 ± 2.9. DASE was applied as first approach in 38%(62% after initial failure of stones extraction). Technical and clinical success was of 91% and 87% respectively. In those in which DASE failed alternative treatment were adopted. After DASE 18% of patients experienced a complication(bleeding 9%, pancreatitis 8%, perforation 0.8%). At univariable analysis, elective endoscopic retrograde cholangiopancreatography(P = 0.031), DASE as first approach(P = 0.032), and cannulation of major papilla followed by guidewire insertion(P = 0.004) were related to low risk of complications. Pre-cut was related to an increased risk of complications(P = 0.01). CONCLUSION DASE allowed a higher first-session success rate and can be consider a valid alternative to endoscopic sphincterotomy not only for bigger CBD stones. | Roberto Di Mitri Filippo Mocciaro Socrate Pallio Giulia Maria Pecoraro Andrea Tortora Claudio Zulli Simona Attardo Attilio Maurano | 2016 | World Journal of Gastrointestinal Endoscopy2016，8，18： | 3 |
| 12 | Over-the-scope clips in the treatment of gastrointestinal tract iatrogenic perforation: A multicenter retrospective study and a classification of gastrointestinal tract perforations显示文摘AIM: To determine the outcome of the management of iatrogenic gastrointestinal tract perforations treated by over-the-scope clip(OTSC) placement.METHODS: We retrospectively enrolled 20 patients(13 female and 7 male; mean age: 70.6 ± 9.8 years) in eight high-volume tertiary referral centers with upper or lower iatrogenic gastrointestinal tract perforation treated by OTSC placement. Gastrointestinal tract perforation could be with oval-shape or with round-shape. Ovalshape perforations were closed by OTSC only by suction and the round-shape by the 'twin-grasper' plus suction. RESULTS: Main perforation diameter was 10.1 ± 4.3 mm(range 3-18 mm). The technical success rate was 100%(20/20 patients) and the clinical success rate was 90%(18/20 patients). Two patients(10%) who did not have complete sealing of the defect underwent surgery. Based upon our observations we propose two types of perforation: Round-shape 'type-1 perforation' and oval-shape 'type-2 perforation'. Eight(40%) out of the 20 patients had a type-1 perforation and 12 patients a type-2(60%). CONCLUSION: OTSC placement should be attempted after perforation occurring during diagnostic or therapeutic endoscopy. A failed closure attempt does not impair subsequent surgical treatment. | Benedetto Mangiavillano Angelo Caruso Raffaele Manta Roberto Di Mitri Alberto Arezzo Nico Pagano Giuseppe Galloro Filippo Mocciaro Massimiliano Mutignani Carmelo Luigiano Enrico Antonucci Rita Conigliaro Enzo Masci | 2016 | World Journal of Gastrointestinal Surgery2016，8，4： | 3 |
| 13 | 液氮冷冲击作用下煤层气储层的裂隙演化显示文摘当煤层气储层遇到温度极低的液氮时,会发生冷冲击效应。本文利用三维X射线显微成像系统和扫描电镜对液氮冷冲击引起的煤样裂隙形态演化特征开展可视化和量化分析。在液氮冷冲击作用后煤样裂隙网络比初始状态致密,孔隙率增加了183.3%;煤样CT扫描层表面孔隙率在液氮冷冲击影响下增加18.76%~215.11%,说明了液氮冷冲击后煤样变形的非均质性。液氮冷冲击作用,总体上对低表面孔隙率比高表面孔隙率扫描层致裂的效果更显著,这表明液氮冷冲击对低渗煤层气储层增产的适用性。液氮冷冲击前、后煤粉和煤块的电镜扫描实验发现,煤基质呈现大量深浅递进分层擦痕特征以及煤块表面裂隙变化的多样性,如扩展、产生、连通和不规则,这是导致液氮冷冲击后煤样单轴抗压强度降低的主要原因。 | 严红 田李鹏 冯锐敏 Hani MITRI 陈俊智 张博 | 2020 | Journal of Central South University2020，27，6： | 3 |
| 14 | Probabilistic approach for open pit bench slope stability analysis——A mine case study显示文摘The geotechnical slope design of an open pit wall starts at the bench scale configuration.At this scale,the rock slope stability is governed primarily by the geological discontinuities within the rock mass and as a result,structurally-controlled failures(e.g.planar,wedge or toppling)are most likely to occur.The probabilistic approach offers a major advantage over the traditional deterministic method in that it accounts for the different degrees of variability and uncertainty often encountered in rock properties.This paper presents a bench slope stability assessment for an open pit mine in Peru using a probabilistic-based approach by coupling a kinematic analysis based on stereographic projection techniques followed by a kinetic analysis by means of the limit equilibrium method.Finally,these two probabilities are combined to provide an overall measure of the probability of failure(PoF)of the bench slope system.The case study is characterized by significant scatter in the geometrical and mechanical properties of the joints.Extensive surface mapping was conducted at 36 different sites following the ISRM suggested procedures.Several direct shear tests were carried out.It is shown that by combining field and laboratory measurements and engineering judgment,the probability density functions(PDF)of the discontinuity parameters can be obtained.These are then used in a Monte Carlo simulation process to compute both kinematic and kinetic probabilities of failure.The overall probability of failure aims to provide the design engineer with a tool to critically evaluate the bench performance from a geotechnical risk perspective and to provide a basis for future bench design optimization. | Christian Obregon Hani Mitri | 2019 | International Journal of Mining Science and Technology2019，29，4： | 3 |
| 15 | Geomechanical effects of stress shadow created by large-scale destress blasting显示文摘This study aims to determine if large-scale choked panel destress blasting can provide sufficient beneficial stress reduction in highly-stressed remnant ore pillar that is planned for production. The orebody is divided into 20 stopes over 2 levels, and 2 panels are choke-blasted in the hanging wall to shield the ore pillar by creating a stress shadow around it. A linear-elastic model of the mining system is constructed with finite difference code FLAC3 D. The effect of destress blasting in the panels is simulated by applying a fragmentation factor(α) to the rock mass stiffness and a stress reduction factor(β) to the current state of stress in the region occupied by the destress panels. As an extreme case, the destress panel is also modeled as a void to obtain the maximum possible beneficial effects of destressing and stress shadow.Four stopes are mined in the stress shadow of the panels in 6 lifts and then backfilled. The effect of destress blasting on the remnant ore pillar is quantified based on stress change and brittle shear ratio(BSR) in the stress shadow zone compared to the base case without destress blasting. To establish realistic rock fragmentation and stress reduction factors, model results are compared to measured stress changes reported for case studies at Fraser and Brunswick mines. A 1.5 MPa immediate stress decrease was observed 20 m away from the panel at Fraser Mine, and a 4 MPa immediate stress decrease was observed 25 m away at Brunswick Mine. Comparable results are obtained from the current model with a rock fragmentation factor α of 0.2 and a stress reduction factor α of 0.8. It is shown that a destress blasting with these parameters reduces the major principal stress in the nearest stopes by 10-25 MPa.This yields an immediate reduction of BSR, which is deemed sufficient to reduce volume of ore at risk in the pillar. | Isaac Vennes Hani Mitri | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，6： | 2 |
| 16 | Results of surgery for liver metastases (LM) after neoadjuvant chemotherapy (CT) with irinotecan + infusional fluorouracil/leucovorin ( Iri - FU/LV ) in patients (pts) with colorectal cancer ( CRC ) 显示文摘 | Clavero - Fabri MC Mitry E Chidiac J | 2003 | Proc Am Soc Clin Oncol2003，22，： | 1 |
| 17 | Incidence of and survival from Wilms' tumour in adults in Europe: data from the EUROCARE study显示文摘 | MITRY E CICCOLALLO L COLEMAN MP | 2006 | Eur J Cancer2006，42，14： | 1 |
| 18 | CD28 ligation in the absence of TCR stimulation up-regulates IL-17A and pro-inflammatory cytokines in relapsing-remitting multiple sclerosis T lymphocytes显示文摘 | CamperioC Muscolini M Volpe E Di Mitri D | | 0，，14： | 1 |
| 19 | Laboratory evaluation of cement-based grouts and grouted rock anchors显示文摘 | Benmokrane B Chennouf A Mitri H S | 1995 | International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts1995，32，7： | 1 |
| 20 | Current status of hepatocyte trans- plantation显示文摘 | Hughes RD Mitry RR Dhawan A | 2012 | Transplantation2012，93，4： | 1 |
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