Journal of Mining and Environment最新文献_第8页

A Preliminary Assessment of Rock Slope Stability in Tropical Climates: A Case Study at Lafarge Quarry, Perak, Malaysia 热带气候下岩质边坡稳定性的初步评估:以马来西亚霹雳州拉法基采石场为例

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9814.1901

K. S. Shah, M. Hashim, K. Ariffin, N. F. Nordin

{"title":"A Preliminary Assessment of Rock Slope Stability in Tropical Climates: A Case Study at Lafarge Quarry, Perak, Malaysia","authors":"K. S. Shah, M. Hashim, K. Ariffin, N. F. Nordin","doi":"10.22044/JME.2020.9814.1901","DOIUrl":"https://doi.org/10.22044/JME.2020.9814.1901","url":null,"abstract":"The stability analysis of rock slopes is a complex task for the geotechnical engineers due to the complex nature of the rock mass in a tropical climate that often has discontinuities in several forms, and consequently, in several types of slope failures. In this work, a rock mass classification scheme is followed in a tropical environment using the Rock Mass Rating (RMR) and Geological Strength Index (GSI) combined with the kinematic investigation using the Rocscience Software Dips 6.0. The Lafarge quarry is divided into ten windows. In the RMR system, the five parameters uniaxial compressive strength (UCS), rock quality designation (RQD), discontinuity spacing, discontinuity condition, and groundwater conditions are investigated. The RMR values range from 51 to 70 (fair to good rock mass), and the GSI values range from 62 to 65 (good to fair rock mass). There is a good and positive correlation between RMR and GSI. The kinematic analysis reveals that window A is prone to critical toppling, window H to critical wedge-planar failure, and window G to critical wedge failure. From the results obtained, it can be concluded that the kinematic analysis combined with the rock mass classification system provides a better understanding to analyze the rock slope stability in a tropical climate compared with considering the rock mass classification system individually.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46052697","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

Investigating and Ranking Blasting Patterns to Reduce Ground Vibration using Soft Computing Approaches and MCDM Technique 利用软计算方法和MCDM技术对降低地面振动的爆破方式进行调查和排序

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9446.1852

D. Mohammadi, R. Mikaeil, J. Sharif

{"title":"Investigating and Ranking Blasting Patterns to Reduce Ground Vibration using Soft Computing Approaches and MCDM Technique","authors":"D. Mohammadi, R. Mikaeil, J. Sharif","doi":"10.22044/JME.2020.9446.1852","DOIUrl":"https://doi.org/10.22044/JME.2020.9446.1852","url":null,"abstract":"The blasting method is one of the most important operations in most open-pit mines that has a priority over the other mechanical excavation methods due to its cost-effectiveness and flexibility in operation. However, the blasting operation, especially in surface mines, imposes some environmental problems including the ground vibration as one of the most important ones. In this work, an evaluation system is provided to study and select the best blasting pattern in order to reduce the ground vibration as one of the hazards in using the blasting method. In this work, 45 blasting patterns used for the Sungun copper mine are studied and evaluated to help determine the most suitable and optimum blasting pattern for reducing the ground vibration. Additionally, due to the lack of certainty in the nature of ground and the analyses relating to this drilling system, in the first step, a combination of the imperialist competitive algorithm and k-means algorithm is used for clustering the measured data. In the second step, one of the multi-criteria decision-making methods, namely TOPSIS (Technique for Order Performance by Similarity to Ideal Solution), is used for the final ranking. Finally, after evaluating and ranking the studied patterns, the blasting pattern No. 27 is selected. This pattern is used with the properties including a hole diameter of 16.5 cm, number of holes of 13, spacing of 4 m, burden of 3 m, and ammonium nitrate fuel oil of 1100 Kg as the most appropriate blasting pattern leading to the minimum ground vibration and reduction of damages to the environment and structures constructed around the mine.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46996991","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

A New Mathematical Model for Production Scheduling in Sub-level Caving Mining Method 分段崩落法生产调度新数学模型

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9139.1804

M. Shenavar, M. Ataee-Pour, M. Rahmanpour

{"title":"A New Mathematical Model for Production Scheduling in Sub-level Caving Mining Method","authors":"M. Shenavar, M. Ataee-Pour, M. Rahmanpour","doi":"10.22044/JME.2020.9139.1804","DOIUrl":"https://doi.org/10.22044/JME.2020.9139.1804","url":null,"abstract":"Production scheduling in underground mines is still a manual process, and achieving a truly optimal result through manual scheduling is impossible due to the complexity of the scheduling problems. Among the underground mining methods, sub-level caving is a common mining method with a high production rate for hard rock mining. There are limited studies about long-term production scheduling in the sub-level caving method. In this work, for sub-level caving production scheduling optimization, a new mathematical model with the objective of net present value (NPV) maximization is developed. The general technical and operational constraints of the sub-level caving method such as opening and developments, production capacity, sub-level mining geometry, and ore access are considered in this model. Prior to the application of the scheduling model, the block model is processed to remove the unnecessary blocks. For this purpose, the floating stope algorithm is applied in order to determine the ultimate mine boundary and reduce the number of blocks that consequently reduces the running time of the model. The model is applied to a bauxite mine block model and the maximum NPV is determined, and then the mine development network is designed based on the optimal schedule.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44631324","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

Integrating Geophysical Attributes with New Cuckoo Search Machine-Learning Algorithm to Estimate Silver Grade Values–Case Study: Zarshouran Gold Mine 结合地球物理属性与布谷鸟搜索机器学习新算法估算银品位——以扎寿然金矿为例

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9939.1923

A. Alimoradi, B. Maleki, A. Karimi, M. Sahafzadeh, S. Abbasi

{"title":"Integrating Geophysical Attributes with New Cuckoo Search Machine-Learning Algorithm to Estimate Silver Grade Values–Case Study: Zarshouran Gold Mine","authors":"A. Alimoradi, B. Maleki, A. Karimi, M. Sahafzadeh, S. Abbasi","doi":"10.22044/JME.2020.9939.1923","DOIUrl":"https://doi.org/10.22044/JME.2020.9939.1923","url":null,"abstract":"The exploration methods are divided into the direct and indirect categories. Among these, the indirect geophysical methods are more time- and cost-effective compared with the direct methods. The target of the geophysical investigations is to obtain an accurate image from the underground features. The Induced polarization (IP) is one of the common methods used for metal sulfide ore detection. Since metal ores are scattered in the host rock in the Zarshouran mine area, IP is considered as a major exploration method. Parallel to IP, the resistivity data gathering and processing are done to get a more accurate interpretation. In this work, we try to integrate the IP/RS geophysical attributes with borehole grade analyses and geological information using the cuckoo search machine-learning algorithm in order to estimate the silver grade values. The results obtained show that it is possible to estimate the grade values from the geophysical data accurately, especially in the areas without drilling data. This reduces the costs and time of the exploration and ore reserves estimation. Comparing the results of the intelligent inversion with the numerical methods, as the major tools to invert the geophysical data to the ore model, demonstrate a superior correlation between the results.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43329906","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

A 3D Finite-Difference Analysis of Interaction between a Newly-Driven Large Tunnel with Twin Tunnels in Urban Areas 城市新建大型隧道与双隧道相互作用的三维有限差分分析

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9444.1851

S. Akbari, S. Zare, H. Chakeri, H. M. N. Abad

引用次数: 3

A Correlation for Estimating LCPC Abrasivity Coefficient using Rock Properties 利用岩石性质估算LCPC耐磨系数的相关性

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9520.1863

M. Ansari, M. Hosseini, A. Beydokhti

{"title":"A Correlation for Estimating LCPC Abrasivity Coefficient using Rock Properties","authors":"M. Ansari, M. Hosseini, A. Beydokhti","doi":"10.22044/JME.2020.9520.1863","DOIUrl":"https://doi.org/10.22044/JME.2020.9520.1863","url":null,"abstract":"Rock abrasivity, as one of the most important parameters affecting the rock drillability, significantly influences the drilling rate in mines. Therefore, rock abrasivity should be carefully evaluated prior to selecting and employing drilling machines. Since the tests for a rock abrasivity assessment require sophisticated laboratory equipment, empirical models can be used to predict rock abrasivity. Several indices based on five known methods have been introduced for assessing rock abrasivity including rock abrasivity index (RAI), Cerchar abrasivity index (CAI), Schimazek’s abrasivity factor (F-abrasivity), bit wear index (BWI), and LCPC abrasivity coefficient (LAC). In this work, 12 rock types with different origins were investigated using the uniaxial compressive strength (UCS), Brazilian test for tensile strength, and longitudinal wave velocity and LCPC tests, and microscopic observations were made to obtain a correlation for estimating the LCPC abrasivity coefficient by conducting the conventional rock mechanics tests. Using the equivalent quartz content, velocity of longitudinal waves, and rock brittleness index, a linear correlation was obtained with a coefficient of determination (R2) of 93.3% using SPSS in order to estimate LAC.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41581851","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

A New Method for Predicting Indirect Tensile Strength of Sandstone Rock Samples 砂岩试样间接抗拉强度预测新方法

IF 0.8

Journal of Mining and Environment Pub Date : 2020-07-01 DOI: 10.22044/JME.2020.9775.1897

H. Fattahi

{"title":"A New Method for Predicting Indirect Tensile Strength of Sandstone Rock Samples","authors":"H. Fattahi","doi":"10.22044/JME.2020.9775.1897","DOIUrl":"https://doi.org/10.22044/JME.2020.9775.1897","url":null,"abstract":"The tensile strength (σt) of a rock plays an important role in the reliable construction of several civil structures such as dam foundations and types of tunnels and excavations. Determination of σt in the laboratory can be expensive, difficult, and time-consuming for certain projects. Due to the difficulties associated with the experimental procedure, it is usually preferred that the σt is evaluated in an indirect way. For these reasons, in this work, the adaptive network-based fuzzy inference system (ANFIS) is used to build a prediction model for the indirect prediction of σt of sandstone rock samples from their physical properties. Two ANFIS models are implemented, i.e. ANFIS-subtractive clustering method (SCM) and ANFIS-fuzzy c-means clustering method (FCM). The ANFIS models are applied to the data available in the open source literature. In these models, the porosity, specific gravity, dry unit weight, and saturated unit weight are utilized as the input parameters, while the measured σt is the output parameter. The performance of the proposed predictive models is examined according to two performance indices, i.e. mean square error (MSE) and coefficient of determination (R2). The results obtained from this work indicate that ANFIS-SCM is a reliable method to predict σt with a high degree of accuracy.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41427295","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

A new technical and economic model to calculate specific charge and specific drilling using hole diameter, height bench, uniaxial compressive strength, and joint set orientation 利用孔径、高度基准、单轴抗压强度和接头组定向计算比装药和比钻的新技术经济模型

IF 0.8

Journal of Mining and Environment Pub Date : 2020-06-30 DOI: 10.22044/JME.2020.9527.1864

A. Zarghami, K. Shahriar, K. Goshtasbi, A. A. Dehkharghani

{"title":"A new technical and economic model to calculate specific charge and specific drilling using hole diameter, height bench, uniaxial compressive strength, and joint set orientation","authors":"A. Zarghami, K. Shahriar, K. Goshtasbi, A. A. Dehkharghani","doi":"10.22044/JME.2020.9527.1864","DOIUrl":"https://doi.org/10.22044/JME.2020.9527.1864","url":null,"abstract":"Calculation of the specific charge and specific drilling before blasting operation play a significant role in blasting pattern design and reduction of the final extraction cost of minerals. Information from Sungun, Miduk and Chah-Firouzeh copper mines in Iran was assessed, and found that there is a significant relationship between specific charge and specific drilling with hole diameter, bench height, uniaxial compressive strength and joint set orientation and tested this model in Sungun copper mine. Due to insufficient consideration during the design of the blast pattern and because of the high hardness in the rock in some parts of the mine, lots of destructive events such as boulders, back break, bench toe, high specific charge and high specific drilling, fly rock and ground vibration in the blast operation were observed. The specific charge and specific drilling are the most important technical and economic parameters in designing the blasting pattern and play an important role in reducing the cost of blasting. The blasting cost could be largely controlled by the accurate examination and computation of these parameters. Based on this model, an increase in the rock strength and the angle between the bench face and the main joint set will increase the specific charge and specific drilling. On the other hand, the specific charge and specific drilling will decrease when the hole diameter increases in every range of uniaxial compressive strength.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41739311","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

Behavior of Tunnel and Neighboring Joint with and without Presence of Rock Bolt under biaxial loads; Particle Flow Code Approach 双轴荷载作用下有无锚杆存在时隧道及相邻节理的受力特性粒子流编码方法

IF 0.8

Journal of Mining and Environment Pub Date : 2020-06-20 DOI: 10.22044/JME.2020.9581.1872

V. Sarfarazi

{"title":"Behavior of Tunnel and Neighboring Joint with and without Presence of Rock Bolt under biaxial loads; Particle Flow Code Approach","authors":"V. Sarfarazi","doi":"10.22044/JME.2020.9581.1872","DOIUrl":"https://doi.org/10.22044/JME.2020.9581.1872","url":null,"abstract":"In this paper, interaction between semi-circular space and neighboring joint with and without Presence of Rock Bolt is investigated using Particle Flow Code. For this purpose, firstly calibration of PFC was performed using both of the Brazilian experimental test and uniaxial compression test. Secondly, numerical model with dimension of 100mm *100 mm was prepared. A semi-circular space with radius of 25 mm was situated below the model. A joint with length of 40 mm was situated above the space. Joint opening was 2mm. Joint angle related to horizontal direction was 0°, 15°, 30°, 45°, 60° and 75°. Totally, 6 different configurations of semi-circular space and neighboring joint were prepared. These models tested with and without presence of vertical rock bolts by biaxial test. The Rock bolt length was 50 mm. The value of lateral force was fixed at 2 MPa. Axial force was applied to the model till final failure was occurred. The results shows that presence of rock bolts change the failure pattern of numerical model. In absence of rock bolt, two tensile wing cracks initiate from joint tip and propagate diagonally till coalescence from model boundary. Also several shear bands were initiated in the left and right sides of the tunnel. In presence of rock bolt, several shear bands were initiated in the left and right sides of the tunnel. The compressive strength with presence of rock bolt was more than that without presence of rock bolt. The failure stress has minimum value when joint angle was 45°.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44677170","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

Mechanical Properties of Low Plasticity Clay Soil Stabilized with Iron Ore Mine Tailing and Portland cement 铁矿尾矿与硅酸盐水泥稳定低塑性粘土的力学性能

IF 0.8

Journal of Mining and Environment Pub Date : 2020-06-09 DOI: 10.22044/JME.2020.9304.1860

A. Ghanizadeh, Abouzar Yarmahmoudi, H. Abbaslou

{"title":"Mechanical Properties of Low Plasticity Clay Soil Stabilized with Iron Ore Mine Tailing and Portland cement","authors":"A. Ghanizadeh, Abouzar Yarmahmoudi, H. Abbaslou","doi":"10.22044/JME.2020.9304.1860","DOIUrl":"https://doi.org/10.22044/JME.2020.9304.1860","url":null,"abstract":"Due to economical and environmental issues, utilization of mineral wastes, e.g. iron ore mine tailing (IOMT), as road materials can be recommended as a sustainable alternative. In the present study, mechanical properties, as well as resistance to freezing and thawing cycles (F-T) of low plasticity clay soil stabilized with different percentages of Portland cement (0, 6, 9, 12 and 15%) and different IOMT content (0, 10, 20, 30 and 40%) has been investigated. To this end, unconfined compressive strength (UCS), initial elastic modulus (E0), and indirect tensile strength (ITS) at different curing times of 7, 14, 18, and 56 days for different admixtures was determined to select optimum mix design for stabilization of clayey subgrade soil. This study shows that by increasing the percentage of cement, strength parameters such as UCS, E0, and ITS increases while increasing IOMT does not show a specific trend to increase strength parameters. Evaluation of strength parameters at different curing time showed that in short-term curing times (7 and 14 days), iron ore mine tailing has a positive effect on the strength parameters, while in long-term curing times (28 and 56 days), iron ore mine tailing has a negative effect on the strength parameters. In total, it was found that 12% of the Portland cement and 10 to 40% of the IOMT passes the UCS and F-T criteria for stabilization of low plasticity clay soils, while clay soil (without IOMT) requires at least 15% of Portland cement for stabilization.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48858529","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