International Journal of Mining and Geo-Engineering最新文献_第4页

Estimation of the Ampere Consumption of Dimension Stone Sawing Machine Using of Artificial Neural Networks 基于人工神经网络的维石锯床安培消耗估算

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57861

A. Aryafar, R. Mikaeil

{"title":"Estimation of the Ampere Consumption of Dimension Stone Sawing Machine Using of Artificial Neural Networks","authors":"A. Aryafar, R. Mikaeil","doi":"10.22059/IJMGE.2016.57861","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57861","url":null,"abstract":"Nowadays, estimating the ampere consumption and achievement of the optimum condition from the perspective of energy consumption is one of the most important steps in reducing the production costs. In this research, we tried to develop an accurate model for estimating the ampere consumption using the artificial neural networks (ANN).In the first step, experimental studies were carried out on 7 carbonate rock samples in different conditions at particular feed rates (100, 200, 300 and 400) and depth of cut (15, 22, 30 and 35mm) using a fully instrumented laboratory rig that is able to change the machine parameters and to measure the ampere consumption. In the next step, a retro-propagation neural network was designed for modelling the sawing process to predict the ampere consumption. The input network consists of two parts: machine, work piece characteristics and the output of neural network was ampere consumption. This research evaluated the competencies of neural networks to estimate the ampere consumption in sawing process. The correlation coefficient between measured and predicted data in training and testing data is 0.95 and 0.97, respectively. The Root Mean Square Error (RMSE) for train and test data is 1.2 and 0.7, respectively. The results of this study show that the ANNs can be used to estimate the ampere consumption with high ability and low error for industrial applications. Moreover, the cost of sawing machine ampere consumption can be accurately estimated using this neural model from some important physical and mechanical properties of rock.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"47 1","pages":"121-130"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77457007","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: 18

A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran 岩石材料化学质量控制的实时方法(以伊朗Semnan砾石矿为例)

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57305

B. Tokhmechi, S. F. Saghravani, Parham Janfeshan Araghi, H. Marvi, Mohamad Esmaeel Borhani, Abolfazl Darbani

{"title":"A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran","authors":"B. Tokhmechi, S. F. Saghravani, Parham Janfeshan Araghi, H. Marvi, Mohamad Esmaeel Borhani, Abolfazl Darbani","doi":"10.22059/IJMGE.2016.57305","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57305","url":null,"abstract":"The quality of concrete is highly dependent on the characteristics of its aggregate, such as the size, minerals, and their chemical properties. Even a small amount of impurities, such as hydrated sulfates, chlorine (salt), and acidic pH of the rock material, can adversely affect the quality of the concrete. Thus, many national codes and standards are developed for testing, selecting, and employing the rock materials in concrete. For instance, Iranian standards 446, 449, 1702, 4978, 4984, 7174, and 86721 are currently serving this purpose. In the present research, a new real-time system was developed in order to replace the customary chemical analysis and size distribution tests. 20 samples were taken from two mines, selected by the Building Material Committee of Semnan Province, in order to determine the dissolved chlorine and sulfate, pH, density as well as size distribution. The new system is constituted of hydraulic jacks and a reservoir, designed to take samples from the conveyer in given time intervals. The samples were washed with distilled water and real-time analyses of dissolved chlorine and pH were performed. The results showed 85% agreement with the results from laboratory analyses. The correct classification rate (CCR) was 92% for 13 samples.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"8 1","pages":"13-22"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79994172","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

Effects of Weak Layer Angle and Thickness on the Stability of Rock Slopes 弱层角和厚度对岩质边坡稳定性的影响

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57859

Garmondyu E. Crusoe, Q. Cai, Jisen Shu, Liu Han, Yamah J. Barvor

{"title":"Effects of Weak Layer Angle and Thickness on the Stability of Rock Slopes","authors":"Garmondyu E. Crusoe, Q. Cai, Jisen Shu, Liu Han, Yamah J. Barvor","doi":"10.22059/IJMGE.2016.57859","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57859","url":null,"abstract":"This paper investigates two key factors (angle and thickness) of a weak layer in relation to their influencing mechanism on slope stability. It puts forward the sliding surface angle and morphological model criteria for the control of rock slopes and realization of its failure mechanism. By comparing the Failure Modes and Safety Factors (Fs) obtained from numerical analysis, the influence pattern for the weak layer angle and the thickness on the stability of rock slopes is established. The result shows that the weak layer angle influences the slope by validating the existence of the “interlocking” situation. It also illustrates that as the angle of the weak layer increases, the Fs unceasingly decreases with an Fs transformation angle. The transformation interval of the Fs demonstrates the law of diminishing of a quadratic function. Analysis of the weak layer thickness on the influence pattern of slope stability reveals three decrease stages in the Fs values. The result also shows that the increase in the thickness of the weak layer increases the failure zone and influences the mode of failure. Given the theoretical and numerical analysis of a weak layer effects on the stability of rock slopes, this work provides a guiding role in understanding the influence of a weak layer on the failure modes and safety factors of rock slopes.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"41 1","pages":"97-110"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77585571","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

Transient Fluid Flow Modeling in Fractured Aquifer of Sechahoon Iron Mine Using Finite Element Method 塞沙熏铁矿裂隙含水层瞬态流体流动有限元模拟

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57863

M. Darabi, A. Ansari, N. Fathianpour, A. Ghorbani

{"title":"Transient Fluid Flow Modeling in Fractured Aquifer of Sechahoon Iron Mine Using Finite Element Method","authors":"M. Darabi, A. Ansari, N. Fathianpour, A. Ghorbani","doi":"10.22059/IJMGE.2016.57863","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57863","url":null,"abstract":"Considering the fact that a large volume of iron reserve in the Sechahoon Iron Mine in Yazd Province has located under the water table, it is necessary to conduct a comprehensive study on water flow within the pit and its surroundings. The conceptual model of the aquifer was created using the surface and underground geological information compared with water table data of the area of interest. In the data preparation stages, in order to create the numerical model, Logan and Lufran tests were carried out to determine the hydrodynamic coefficients of the layers. The precipitation and evaporation, as well as the fractures and faults of the region, as a medium for flow channels in the hard formation, were also studied. The model was created in a transient state between 2000 and 2014. To validate its results, the water table was measured 4 times in the last 4 months of 2014. Considering the complexities in the heterogeneous fractured aquifer of the study area, numerical modeling results for the basin in a transient state present 90 percent correlation with field studies. Having investigated the water balance in the region, the boundary condition of the model was determined as the input water from the eastern south and the runoff water in the western north of the region. Since the general trend of faults in the area is north-south, the water table variation is slight on northsouth and intense on the east-west direction. On the other hand, due to the fact that the maximum flow is along the faults and fractures, the water table contour lines in different locations over the region are closed.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"82 1","pages":"145-156"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83955783","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

Geological Hazards analysis in Urban Tunneling by EPB Machine (Case study: Tehran subway line 7 tunnel) EPB掘进机在城市隧道施工中的地质灾害分析(以德黑兰地铁7号线隧道为例)

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57306

H. B. Amnieh, Mohammad Saber Zamzam, M. Mozdianfard

{"title":"Geological Hazards analysis in Urban Tunneling by EPB Machine (Case study: Tehran subway line 7 tunnel)","authors":"H. B. Amnieh, Mohammad Saber Zamzam, M. Mozdianfard","doi":"10.22059/IJMGE.2016.57306","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57306","url":null,"abstract":"Technological progress in tunneling has led to modern and efficient tunneling methods in vast underground spaces even under inappropriate geological conditions. Identification and access to appropriate and sufficient geological hazard data are key elements to successful construction of underground structures. Choice of the method, excavation machine, and prediction of suitable solutions to overcome undesirable conditions depend on geological studies and hazard analysis. Identifying and investigating the ground hazards in excavating urban tunnels by an EPB machine could augment the strategy for improving soil conditions during excavation operations. In this paper, challenges such as geological hazards, abrasion of the machine cutting tools, clogging around these tools and inside the chamber, diverse work front, severe water level fluctuations, existence of water, and fine-grained particles in the route were recognized in a study of Tehran subway line 7, for which solutions such as low speed boring, regular cutter head checks, application of soil improving agents, and appropriate grouting were presented and discussed. Due to the presence of fine particles in the route, foam employment was suggested as the optimum strategy where no filler is needed.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"9 1","pages":"23-36"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83656201","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

The reclamation of mica flakes from tailing disposal using gravity separators and flotation 尾矿处理中云母片的重选浮选回收

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57309

S. M. Hoseini, A. Bahrami, M. Hosseinzadeh

引用次数: 6

Application of gravity separators for enrichment of South Chah-Palang tungsten ore 重选机在南察巴郎钨矿富集中的应用

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57304

Hamid Hedayati Sarab-shahrak, M. Noaparast, S. Z. S. Tonkaboni, S. Hosseini

{"title":"Application of gravity separators for enrichment of South Chah-Palang tungsten ore","authors":"Hamid Hedayati Sarab-shahrak, M. Noaparast, S. Z. S. Tonkaboni, S. Hosseini","doi":"10.22059/IJMGE.2016.57304","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57304","url":null,"abstract":"In the present study, the possibility of concentrating tungsten-copper vein ore in South Chah-Palang was examined using gravity separators including Jig Machine (-2360+600 µm), shaking table (-600+120 µm), and multi-gravity separator (MGS) (-120 µm). The representative sample contains 1.5% WO3 and 5.95% CuO. The main tungsten minerals were ferberite and wolframite and their appropriate liberation degree was approximately in the range of 250 µm. Box-Behenken and CCD response surface methods were applied to model and optimize jig machine and MGS results, respectively. Shaking table performance was modeled by full factorial design method. In Jig machine tests, the effects of water flow rate, frequency and feed particle size were investigated. Deck inclination, wash water, and feed water flow rate were operational parameters in shaking table. In the MGS testes, the effects of two parameters of tilt angle and wash water flow rate were inspected. In this set of experiments, WO3 recovery and grade were considered as responses of each model. The maximum recovery of WO3 in jig machine was obtained in water flow rate of 3.71 lit/min, frequency of 153rpm, and the particle size range of -2360+1700 µm. In this case, the grade and recovery of WO3 were 2.85% and 94.33%, respectively. The maximum WO3 recovery was 93.9% with grade of 8.20 % using shaking table in the deck inclination of 11 degree, feed water flow rate of 7 lit/min, and wash water flow rate of 8 lit/min. The maximum WO3 recovery in MGS attained with 3.45 degrees tilt angle and wash water rate of 3.16 lit/min. The grade and recovery of WO3 in the MGS method were 4.2% and 90.61%, respectively.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"148 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77799697","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

Application of fractal modeling and PCA method for hydrothermal alteration mapping in the Saveh area (Central Iran) based on ASTER multispectral data 基于ASTER多光谱数据的分形建模和PCA方法在伊朗中部Saveh地区热液蚀变填图中的应用

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57307

Mirko Ahmadfaraj, M. Mirmohammadi, P. Afzal

{"title":"Application of fractal modeling and PCA method for hydrothermal alteration mapping in the Saveh area (Central Iran) based on ASTER multispectral data","authors":"Mirko Ahmadfaraj, M. Mirmohammadi, P. Afzal","doi":"10.22059/IJMGE.2016.57307","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57307","url":null,"abstract":"The aim of this study is determination and separation of alteration zones using Concentration-Area (C-A) fractal model based on remote sensing data which has been extracted from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images. The studied area is on the SW part of Saveh, 1:250,000 geological map, which is located in Urumieh-Dokhtar magmatic belt, Central Iran. The pixel values were computed by Principal Component Analysis (PCA) method used to determine phyllic, argillic, and propylitic alteration zones. The C-A fractal model is utilized for separation of different parts of alteration zones due to their intensity. The log-log C-A plots reveal multifractal nature for phyllic, argillic, and propylitic alteration zones. The obtained results based on fractal model show that the main trend of the alteration zones is in NW-SE direction. Compared to the geological map of the study area and copper mineralizations, the alteration zones have been detected properly and correlate with the mineral occurrences, intrusive rock, and faults.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"48 1","pages":"37-48"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83031594","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: 18

Accuracy evaluation of different statistical and geostatistical censored data imputation approaches (Case study: Sari Gunay gold deposit) 不同统计与地统计截尾数据估算方法的精度评价(以Sari Gunay金矿为例)

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57308

B. Ghane, O. Asghari

引用次数: 2

A NEW ANALYTICAL SOLUTION FOR DETERMINATION OF ACCEPTABLE OVERALL SETTLEMENT OF HEAP LEACHING STRUCTURES FOUNDATION 一种确定堆浸结构基础可接受整体沉降的新解析解

International Journal of Mining and Geo-Engineering Pub Date : 2016-06-01 DOI: 10.22059/IJMGE.2016.57860

Emad Khorasani, M. Amini, Saeed Soltani-Mohammadi

{"title":"A NEW ANALYTICAL SOLUTION FOR DETERMINATION OF ACCEPTABLE OVERALL SETTLEMENT OF HEAP LEACHING STRUCTURES FOUNDATION","authors":"Emad Khorasani, M. Amini, Saeed Soltani-Mohammadi","doi":"10.22059/IJMGE.2016.57860","DOIUrl":"https://doi.org/10.22059/IJMGE.2016.57860","url":null,"abstract":"There are some artificial and natural materials on foundation of heap leaching structures. Geomembrane liner is the most important artificial isolated layer of these structures. The thickness of this layer is about 1 to 2 mm. Foundation overall settlement of such structures changes the primary length of the geomembrane layer. If the strain of geomembrane is more than allowable one, the layer will be fail and acid will leakage from the heap foundation. In this paper, foundation of the heap leaching structures is modeled with a hyperbolic curve and the length of geomembrane liner will be determined before and after loading. Next, with considering allowable strain of geomembrane materials, acceptable overall settlement of heap foundation is computed. Then, a design chart is presented for quick estimation of acceptable overall settlement of such structures. Finally, foundation overall settlement of a real case study (Tarom heap leaching structure) is determined with this approach. The analysis shows that geomembrane liner of this case may not fail due to foundation overall settlement.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"15 1","pages":"111-120"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81031495","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