Journal of Mining and Environment最新文献

Fe3O4@TiO2@V2O5 as an efficient magnetic nanoparticle for synthesis of di-indolyl oxindole derivatives Fe3O4@TiO2@V2O5作为一种有效的磁性纳米颗粒用于合成二吲哚吲哚衍生物

IF 0.8

Journal of Mining and Environment Pub Date : 2021-10-30 DOI: 10.22044/JME.2021.11092.2086

H. Hassani, A. Agah

引用次数: 0

Propose a viable stabilization method for slope in weak rock mass environment using numerical modelling: A case study from the cut slopes 提出了一种可行的软弱岩体环境下边坡稳定的数值模拟方法:以开挖边坡为例

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Journal of Mining and Environment Pub Date : 2021-10-27 DOI: 10.22044/JME.2021.11198.2099

S. Hussain, Z. Rehman, N. Khan, Ishaq Ahmad, S. Raza, Muhammad Tahir, Asad Ullah, D. Afzal, Ali Khan, M. Salman, S. Sherin

{"title":"Propose a viable stabilization method for slope in weak rock mass environment using numerical modelling: A case study from the cut slopes","authors":"S. Hussain, Z. Rehman, N. Khan, Ishaq Ahmad, S. Raza, Muhammad Tahir, Asad Ullah, D. Afzal, Ali Khan, M. Salman, S. Sherin","doi":"10.22044/JME.2021.11198.2099","DOIUrl":"https://doi.org/10.22044/JME.2021.11198.2099","url":null,"abstract":"The design of a stable slope in a rock mass environment is a quite complicated job due to the anisotropic behaviour of the rock mass. In this research work, the cut slopes at the Swat motorway in the weakest schist rock is numerically analyzed by the shear strength reduction (SSR) approach using the Finite Element-based 2D RS2 software. The slope is divided into two cases according to the nature of the rock. Each case of the cut slope is analyzed by two stabilization methods: 1) changing the characteristics of the slope 2) support system installation based on the Mohr-Coulomb (MCC) and Generalized Hoek and Brown (GHB) failure criteria in order to propose the most appropriate method for slope stabilization. The results obtained reveal that the Critical Strength Reduction Factor (CSRF) before applying the stabilization methods is 1.34 (MCC) and 1.04 (GHB) for Case-I and 1.21 (MCC) and 0.53 (GHB) for Case-II. CSRF for Case-I after changing the characteristics of the slope is observed to be 2.43 (MCC) and 2.33 (GHB), while for Case-II is 1.82 (MCC) and 1.26 (GHB), respectively. CSRF for Case-I after the support installation criteria is 1.59 (MCC) and 1.07 (GHB), while for Case-II is 1.65 (MCC) and 0.5 (GHB), respectively. Based on the comparative analysis, it is revealed that changing the characteristics of the slope method shows prominent results in both cases; therefore, this method can be effectively used in order to stabilize the slope in the weakest rock mass environment.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41621026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An investigation on tailing slurry transport in Kooshk lead-zinc mine in Iran based on non-Newtonian fluid rheology: an experimental study 基于非牛顿流体流变的伊朗库什克铅锌矿尾矿浆输运试验研究

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Journal of Mining and Environment Pub Date : 2021-09-24 DOI: 10.22044/JME.2021.11105.2093

J. V. Mehrabani, M. Goharkhah

{"title":"An investigation on tailing slurry transport in Kooshk lead-zinc mine in Iran based on non-Newtonian fluid rheology: an experimental study","authors":"J. V. Mehrabani, M. Goharkhah","doi":"10.22044/JME.2021.11105.2093","DOIUrl":"https://doi.org/10.22044/JME.2021.11105.2093","url":null,"abstract":"In the current research work, a piping system is designed for slurry transport to the tailing dam in the Kooshk lead-zinc mine, Iran. The experiments are carried out primarily to investigate the rheological behavior of the slurry at different densities and obtain a non-Newtonian model for the shear stress variation with the deformation rate. It is shown that the shear stress of concentrated slurry follows the plastic Bingham model. The results obtained also indicate the increasing trend of the yield stress and the apparent viscosity of the slurry with the density. Appropriate correlations are proposed for the apparent viscosity and yield stress as a function of pulp concentration. At the next step, the required design parameters such as the slurry flow rate, pressure drop, critical velocity, and minimum required head for flow initiation and head losses are calculated for different slurry densities and pipe sizes. The appropriate piping system is finally designed based on the experimental data and the calculated parameters. It is concluded that the 3 in diameter pipe can be used to deliver the slurry with solid concentrations between 44% < Cw < 60% by weight, without a pumping system.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44982247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating correlation of physico-mechanical parameters and P-wave velocity of rocks: a comparative intelligent study 岩石物理力学参数与纵波速度相关性的比较研究

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Journal of Mining and Environment Pub Date : 2021-09-19 DOI: 10.22044/JME.2021.11121.2092

H. Fattahi, Mahdi Hasanipanah, N. Z. Ilghani

{"title":"Investigating correlation of physico-mechanical parameters and P-wave velocity of rocks: a comparative intelligent study","authors":"H. Fattahi, Mahdi Hasanipanah, N. Z. Ilghani","doi":"10.22044/JME.2021.11121.2092","DOIUrl":"https://doi.org/10.22044/JME.2021.11121.2092","url":null,"abstract":"The mechanical characteristics of rocks and rock masses are considered as the determining factors in making plans in the mining and civil engineering projects. Two factors that determine how rocks responds in varying stress conditions are P-wave velocity (PWV) and its isotropic properties. Therefore, achieving a high-accurate method to estimate PWV is a very important task. This work investigates the use of different intelligent models such as multivariate adaptive regression splines (MARS), classification and regression tree (CART), group method of data handling (GMDH), and gene expression programming (GEP) for the prediction of PWV. The proposed models are then evaluated using several error statistics, i.e. squared correlation coefficient (R2) and root mean squared error (RMSE). The values of R2 obtained from the CART, MARS, GMDH, and GEP models are 0.983, 0.999, 0.995, and 0.998, respectively. Furthermore, the CART, MARS, GMDH, and GEP models predict PWV with the RMSE values of 0.037, 0.007, 0.023, and 0.020, respectively. According to the aforementioned amounts, the models presented in this work predict PWV with a good performance. Nevertheless, the results obtained reveal that the MARS model yields a better prediction in comparison to the GEP, GMDH, and CART models. Accordingly, MARS can be offered as an accurate model for predicting the aims in other rock mechanics and geotechnical fields.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45467710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Influence of single tunnel and twin tunnel on collapse pattern and maximum ground movement 单隧道和双隧道对塌方形态和最大地表移动的影响

IF 0.8

Journal of Mining and Environment Pub Date : 2021-09-07 DOI: 10.22044/JME.2021.11088.2085

V. Sarfarazi, Kaveh Asgari

{"title":"Influence of single tunnel and twin tunnel on collapse pattern and maximum ground movement","authors":"V. Sarfarazi, Kaveh Asgari","doi":"10.22044/JME.2021.11088.2085","DOIUrl":"https://doi.org/10.22044/JME.2021.11088.2085","url":null,"abstract":"Particle Flow Code in Two Dimensions (PFC2D) was used in order to examine the influence of single tunnel and twin tunnel on the collapse pattern and maximum ground movement. Since first PFC was calibrated by the experiments, the results obtained were rendered by a uniaxial test. Further, a rectangular model with dimensions of 100 m ˟ 100 m containing both the central tunnel and twin tunnel was built. The center of the single tunnel was placed 25 m under the ground surface, and its diameter changed from 10 m to 35 m with an increment of 5 m. The center of the twin tunnel was situated 25 m under the ground surface, and its diameter was changed from 10 m to 30 m with an increment of 5 m. For measurement of the vertical displacement, one measuring circle with a 2 m diameter was opted on the ground surface above the tunnel roof. The average of the vertical movement of discs covered in these circles was determined as a ground settlement. A confining pressure of 0.01 MPa was applied on the model. The uniaxial compression strength was 0/09 MPa; the results obtained depicted that the tunnel diameter controlled the extension of the collapse zone. Also the vertical displacement at the roof of the tunnel declined by decreasing the tunnel diameter. The ground settlement increased by increasing the tunnel diameter.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44740592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Approaches for designing extraction methods for randomly occurring pocket formation of Gemstones. A case of Musakashi Emerald area, Solwezi, Zambia. 宝石随机形成袋形的提取方法设计方法。赞比亚Solwezi Musakashi Emerald地区一例。

IF 0.8

Journal of Mining and Environment Pub Date : 2021-08-17 DOI: 10.22044/JME.2021.10661.2024

Joseph Manyepa, Victor Mutambo

{"title":"Approaches for designing extraction methods for randomly occurring pocket formation of Gemstones. A case of Musakashi Emerald area, Solwezi, Zambia.","authors":"Joseph Manyepa, Victor Mutambo","doi":"10.22044/JME.2021.10661.2024","DOIUrl":"https://doi.org/10.22044/JME.2021.10661.2024","url":null,"abstract":"Designing suitable extraction methods for mining randomly occurring pocket formation of gemstones has never been easy at the Musakashi emerald mine due to the limited geological information. In order to improve the productivity as well as the recovery, in this work, we undertake a detailed geological survey (airborne, surface mapping, geochemical sampling, and trenching activities), and review, analyze, and establish the appropriate extraction methods, and conduct the economic viability of the mining emeralds in the Musakashi area. A total of 51 holes are drilled in order to define the mineralization and estimate the mineral resource for the rubble ore and the in-situ ore zones using the Surpac Geovia software. The diamond drilling unravels the existence of an alteration zone enveloping the shales in an area of 150m by 100m. The emerald is localized within these reaction zones, and is estimated to extend to a depth of about 20–30m below the surface. The total mineral resource stands at 345, 290 grams for the rubble ore and 123,870 grams for the discordant veins. From the geological information obtained, a trial pit design is established with a target of increasing recovery of emeralds from the current 10 kg to 100 kg per year.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45055889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interaction of Excavated Tunnels by Earth Pressure Balance Machines (EPBMs) and Subsurface Obstacles, Case Study: Tehran Metro Line 7 土压平衡机挖掘隧道与地下障碍物的相互作用，案例研究：德黑兰地铁7号线

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Journal of Mining and Environment Pub Date : 2021-08-06 DOI: 10.22044/JME.2021.10868.2061

D. Mohammadi, K. Shahriar, D. Parsapour

{"title":"Interaction of Excavated Tunnels by Earth Pressure Balance Machines (EPBMs) and Subsurface Obstacles, Case Study: Tehran Metro Line 7","authors":"D. Mohammadi, K. Shahriar, D. Parsapour","doi":"10.22044/JME.2021.10868.2061","DOIUrl":"https://doi.org/10.22044/JME.2021.10868.2061","url":null,"abstract":"Tunneling in urban areas has always encountered many uncertainties, which if not considered in both analysis and design of the tunnels, will cause unexpected events during tunnel construction. Obstacles are among the most remarkable uncertainties in tunneling that affect the tunnel construction process. The obstacles in urban tunneling include municipal utilities, surface and sub-surface structures, channels, wells, storages, and unknown cavities. Tehran Metro Line 7 in Iran is no exception to the rule, and has been grappling with the obstacles. In this work, we investigate the effect of the existence of wells and unknown cavities in the zone of influence of excavated tunnels by EPBM. The innovation of this research work is in the EPB tunnel design encountering wells and cavities that are as risky as the adjacent underground structure. In this work, we use a numerical simulation of the 3D finite difference method (FDM) so a series of parametric studies based on the numerical model are examined using the well and unknown cavity geometry and their location relative to the tunnel in alluvium. According to the results obtained, a major disturbance occurs in the near field of the well–tunnel, and the interaction problem happens in front of the tunnel face. The numerical outcome indicates that the most critical state of the ground settlement by EPBM happens when the well and unknown cavity are located in the face of the tunnel. It is also proved that the ground behavior is different for each part of EPBM such as ahead of the face, cutter head, shield, and segmental lining parts.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48903770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of confining pressure on the Is(50) obtained by point load test 围压对点载试验所得Is(50)的影响

IF 0.8

Journal of Mining and Environment Pub Date : 2021-08-02 DOI: 10.22044/JME.2021.10918.2070

V. Sarfarazi, Kaveh Asgari

引用次数: 0

The influence of physical and chemical material properties on mining soil deterioration processes around Mineral Salts Company in Mighan playa, Arak, Iran 伊朗梅甘盐业公司周边矿用土壤理化性质对土壤退化过程的影响

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Journal of Mining and Environment Pub Date : 2021-07-19 DOI: 10.22044/JME.2021.10656.2023

M. Fooladi, F. Ghadimi, Seyed-Jamal Sheikh-Zakariaee, H. R. Bonab

{"title":"The influence of physical and chemical material properties on mining soil deterioration processes around Mineral Salts Company in Mighan playa, Arak, Iran","authors":"M. Fooladi, F. Ghadimi, Seyed-Jamal Sheikh-Zakariaee, H. R. Bonab","doi":"10.22044/JME.2021.10656.2023","DOIUrl":"https://doi.org/10.22044/JME.2021.10656.2023","url":null,"abstract":"In this work, we determine the factors affecting soil erosion and its effect on dust formation around the Mineral Salts Company in Mighan playa of Arak. Seventy samples are randomly sampled from a depth of 10 cm above the ground around Mighan playa. Some factors involved (e.g. sample aggregation, lime, organic matter, pH, Na, K, Ca, and electrical conductivity) are determined and compared with the statistical parameters such as the correlation matrix and cluster analysis in order to determine the erosion rate in each sample based on the soil properties. The results obtained show that soil salinity, as a major factor in erosion, causes soil depletion and degradation in the area. Also a high amount of sand in the environment causes the soil texture instability. The factors such as the amount of gravel, organic matter, and K are the main erosion inhibiting factors, which have little effect on the majority of the samples. The organic matter content in most samples is less than 4%, and does not have much effect on erosion. The amount of clay in the samples is less than 10%, and has no effect on the adhesion of soil texture. The main factor affecting the erosion rate is EC and Na in the soil. The inhibitors such as gravel, organic matter, K, and clay amount in the samples can be considered as a protective or reducing factor in erosioning. Rising in the mentioned factors in the soil causes a lack of density and instability in the soil, and increases the rate of soil erosion. The results of this work show that addition of soil erosion increases the amount of fine-grained soil, and dust is a result of increased production. Also the presence of mineral salt in the area increases the production rate of dense soil, and as a result, rises the amount of dust produced in the area. Therefore, we need to stabilize mining soil, and prevent dust generation around the Mineral Salts Company.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41319264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Expected Proportional Hazard Model in Preventive Maintenance 预防性维修中的预期比例风险模型

IF 0.8

Journal of Mining and Environment Pub Date : 2021-07-08 DOI: 10.22044/JME.2021.10812.2051

A. N. Qarahasanlou, M. Ataei, R. Shahabi

{"title":"Expected Proportional Hazard Model in Preventive Maintenance","authors":"A. N. Qarahasanlou, M. Ataei, R. Shahabi","doi":"10.22044/JME.2021.10812.2051","DOIUrl":"https://doi.org/10.22044/JME.2021.10812.2051","url":null,"abstract":"Whether directly in the form of expenses or indirectly, the objective of maintenance in the mining industry is self-evident in time losses and loss of production. In this paper, the reliability-based maintenance is examined with a different insight than before. The system goes back to the Good As New (GAN) state or too Bad As Old (BAO) maintenance state; why so, the maintenance of the system shifts to the midrange state. On the other hand, the implementation of repairs is strongly influenced by the environmental factors that are known as the “risk factors”. Therefore, an analysis requires a model that integrates two basic elements: (1) incompleteness of the maintenance effect and (2) risk factors. Thus, an extensive proportional hazard ratio model (EPHM) is used as a combination of the Proportional Hazard Model (PHM) and the Hybrid Imperfect Preventive Maintenance model (HIPM) in order to analyze these elements. In this regards, four different preventive maintenance strategies are proposed. All four strategies are time-based including constant interval or periodic (the first and second strategies) and cyclic interval (the third and fourth strategies). The proposed method is applied for a Komatsu HD785-5 dump-truck in the Songun copper mine as a case study. The PM intervals with a mean value of risk factors for the four activities to reach the 80% reliability for the first and second strategies are about 5 and 48 hours. These intervals for the third strategy are calculated as 48.36, 11.58, 10.25, and 9.035, and for the fourth strategy are 5.06, 4.078, 3.459, and 1.92.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47829108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2