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

IF 0.8

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":null,"pages":null},"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

Estimation of optimum geometric configuration of mine dumps in Wardha valley coalfields in India: a case study 印度瓦尔达河谷煤田排土场最佳几何构型估算:一个案例研究

IF 0.8

Journal of Mining and Environment Pub Date : 2021-10-05 DOI: 10.22044/JME.2021.10979.2074

Radhakanta Koner

{"title":"Estimation of optimum geometric configuration of mine dumps in Wardha valley coalfields in India: a case study","authors":"Radhakanta Koner","doi":"10.22044/JME.2021.10979.2074","DOIUrl":"https://doi.org/10.22044/JME.2021.10979.2074","url":null,"abstract":"The Wardha valley coalfields, situated in the western part of India, contribute to more than 7% of the national coal production. The open-pit mining methods are the modes of exploitation of coal in the majority of the mines in the area. Due to the increased depth of working and higher stripping ratio, the output of waste overburden is increased. The challenges are the scarcity of the available land for dumping waste overburden geo-material safely. Optimization of the mine dump slope geometry is the only available alternative in the hands of the management in order to increase the life of the projects and continue the production of coal. This investigation specifically addresses this issue, and proposes a combination of the optimum geometric configurations of the dump slope. This work utilizes the computational power of the numerical modeling technique in order to solve a large number of alternatives and zero them down to the optimum combination. The numerical modeling is considered as a major external factor that contributes to the mine dump's instability. This work shows an 18% increase in the dumping waste material volume in the present condition. This investigation also reveals that double stage dumping is comparably better in optimizing the dump slope configuration.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68386302","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: 4

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

IF 0.8

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":null,"pages":null},"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

IF 0.8

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":null,"pages":null},"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

Carnallite Flotation of Khur Biabanak Potash Complex using kimiaflot 619 as a New Collector 用kimiaflot 619作为新型捕收剂浮选Khur Biabanak钾杂岩光卤石

IF 0.8

Journal of Mining and Environment Pub Date : 2021-09-19 DOI: 10.22044/JME.2021.10881.2064

A. Javadi

引用次数: 0

Study of Effect of Cooling/Lubricating Fluids, Machining Parameters, and Rock Mechanical Properties on Penetration Rate in Rock Drilling Process 冷却/润滑流体、加工参数和岩石力学特性对岩石钻进速度的影响研究

IF 0.8

Journal of Mining and Environment Pub Date : 2021-09-13 DOI: 10.22044/JME.2021.11017.2078

R. Mikaeil, Shahrokh Khosravimanesh, M. C. Seifabad, R. Bagherpour

{"title":"Study of Effect of Cooling/Lubricating Fluids, Machining Parameters, and Rock Mechanical Properties on Penetration Rate in Rock Drilling Process","authors":"R. Mikaeil, Shahrokh Khosravimanesh, M. C. Seifabad, R. Bagherpour","doi":"10.22044/JME.2021.11017.2078","DOIUrl":"https://doi.org/10.22044/JME.2021.11017.2078","url":null,"abstract":"In most rock drilling operations, the low rate of penetration (ROP) can be primarily attributed to the presence of the cuttings produced during drilling and the thermal stresses caused by friction at the bit-rock interface, which can be exacerbated with the increasing strength, hardness, and abrasivity of the drilled rock. In order to improve ROP, drill bit lifetime, and cutting power, it is necessary to minimize the process forces due to the mechanical bit-rock interaction and the thermal stresses generated in the drill hole. Any improvement in these areas is extremely important from both the technical and the economic perspectives. This improvement can be achieved by the use of appropriate cooling/lubricating fluids in the drilling process in order to increase ROP, reduce the temperature of the drilling environment, and create a clean drill hole free of cuttings. In this work, a series of laboratory drilling tests are performed to investigate and compare ROP in the drilling of seven samples of hard and soft rock in the presence of six different cooling-lubricating fluids. The drilling tests are performed on the cubic specimens with a laboratory-scale drilling rig at several different rotation speeds and thrust forces. The statistical analyses are performed in order to investigate the relationship between ROP and the mechanical properties of the rock, properties of the fluid, and machining parameters of the drilling rig. These analyses show that under similar conditions in terms of mechanical properties of the rock using Syncool with a concentration of 1:100 and soap water with a concentration of 1:120 instead of pure water leads to the average 31% and 37% increased ROP in granite, 36% and 43% increased ROP in marble, and 47% and 61% increased ROP in travertine, respectively. These results demonstrate the good performance of these cooling/lubricating fluids in increasing ROP.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49048635","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

Determining an appropriate range for the number of cuboid lifters in ball mills using DEM 使用DEM确定球磨机中长方体挺杆数量的适当范围

IF 0.8

Journal of Mining and Environment Pub Date : 2021-09-11 DOI: 10.22044/JME.2021.11052.2081

M. Chegeni, Sajad Kolahi

{"title":"Determining an appropriate range for the number of cuboid lifters in ball mills using DEM","authors":"M. Chegeni, Sajad Kolahi","doi":"10.22044/JME.2021.11052.2081","DOIUrl":"https://doi.org/10.22044/JME.2021.11052.2081","url":null,"abstract":"The number of lifters in the liner of ball mills and the mill rotation speed are among the most significant factors affecting the behavior of grinding charge (balls) and their motion trajectory, and consequently, the comminution mechanism in these mills. In this research, in order to find a suitable range for the number of lifters in the liner of ball mills, the DEM method is utilized. Initially, a pilot-scale ball mill with dimensions of 2.0 m × 1.11 m without any lifter is simulated. Afterwards, by adding, respectively, 1, 2, 4, 8, 16, 20, 26, 30, and 32 cuboid lifter(s) with dimensions of 2 m × 5 cm × 5 cm, nine other separate simulations are performed. The influences of the number of cuboid lifters on the two new factors introduced here, namely ‘head height’ (HH) and ‘impact zone length’ (IZL) at various mill speeds, that is, 70% and 80% of its critical speed (CS) are investigated. The results indicate that in order to find a suitable range for the number of lifters in the liner of ball mills, it is necessary to consider these two parameters simultaneously as the criteria for selecting the appropriate range, That is, liners that simultaneously produce both a higher HH and a greater IZL are more suitable for use in the industry. The results also demonstrate that the suitable range for the number of cuboid lifters in the liner of ball mills is between 16 and 32, which field research on the ball mills of three different plants in the industry confirms the accuracy of the results obtained in this research. Unlike the previous research works, it has now been shown that the number of ball mill lifters does not only depend on the diameter of the mill but also depends on the width, height, angle of the lifter, and generally on the type of lifter.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42652050","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: 1

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":null,"pages":null},"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

Optimization of Process Parameters for Enhanced Up-gradation of Qilla Saifullah Copper ore through Froth Floatation Technique Froth浮选技术提高齐拉赛富拉铜矿品位工艺参数的优化

IF 0.8

Journal of Mining and Environment Pub Date : 2021-08-24 DOI: 10.22044/JME.2021.10796.2047

M. Ibrahim, Nisar Mohammad, Zaheer Kasi, Sher Bacha, N. Khan, Muhammad Iftikhar Khan

引用次数: 0