International Journal of Mining and Geo-Engineering最新文献_第6页

Gas migration through cement slurries analysis: A comparative laboratory study 水泥浆中气体运移分析:对比实验室研究

International Journal of Mining and Geo-Engineering Pub Date : 2015-12-01 DOI: 10.22059/IJMGE.2015.56113

A. Velayati, E. Kazemzadeh, H. Soltanian, B. Tokhmechi

引用次数: 18

RAM analysis of earth pressure balance tunnel boring machines: A case study 土压平衡式隧道掘进机的RAM分析:一个案例研究

International Journal of Mining and Geo-Engineering Pub Date : 2015-12-01 DOI: 10.22059/IJMGE.2015.56105

H. A. Khoshalan, S. Torabi, S. H. Hoseinie, B. Ghodrati

{"title":"RAM analysis of earth pressure balance tunnel boring machines: A case study","authors":"H. A. Khoshalan, S. Torabi, S. H. Hoseinie, B. Ghodrati","doi":"10.22059/IJMGE.2015.56105","DOIUrl":"https://doi.org/10.22059/IJMGE.2015.56105","url":null,"abstract":"Earth pressure balance tunnel boring machines (EPB-TBMs) are favorably applied in urban tunneling projects. Despite their numerous advantages, considerable delays and high maintenance cost are the main disadvantages these machines suffer from. Reliability, availability, and maintainability (RAM) analysis is a practical technique that uses failure and repair dataset obtained over a reasonable time for dealing with proper machine operation, maintenance scheduling, cost control, and improving the availability and performance of such machines. In the present study, a database of failures and repairs of an EBP-TBM was collected in line 1 of Tabriz subway project over a 26-month interval of machine operation. In order to model the reliability of the TBM, this machine was divided into five distinct subsystems including mechanical, electrical, hydraulic, pneumatic, and water systems in a series configuration. According to trend and serial correlation tests, the renewal processes were applied, for analysis of all subsystems. After calculating the reliability and maintainability functions for all subsystems, it was revealed that the mechanical subsystem with the highest failure frequency has the lowest reliability and maintainability. Similarly, estimating the availability of all subsystems indicated that the mechanical subsystem has a relatively low availability level of 52.6%, while other subsystems have acceptable availability level of 97%. Finally, the overall availability of studied machine was calculated as 48.3%.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"119 1","pages":"173-185"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77452410","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

On the selection of an appropriate excavation pattern for urban tunnels with big cross-section: A case study 大断面城市隧道开挖方式的选择——以实例为例

International Journal of Mining and Geo-Engineering Pub Date : 2015-12-01 DOI: 10.22059/IJMGE.2015.56116

Roohallah Bolghonabai, M. Hossaini, M. Mohammadi, A. Nazem

引用次数: 9

3D Inversion of Magnetic Data through Wavelet based Regularization Method 基于小波正则化方法的三维磁数据反演

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54360

M. Abedi, H. Siahkoohi, A. Gholami, G. Norouzi

{"title":"3D Inversion of Magnetic Data through Wavelet based Regularization Method","authors":"M. Abedi, H. Siahkoohi, A. Gholami, G. Norouzi","doi":"10.22059/IJMGE.2015.54360","DOIUrl":"https://doi.org/10.22059/IJMGE.2015.54360","url":null,"abstract":"This study deals with the 3D recovering of magnetic susceptibility model by incorporating the sparsity-based constraints in the inversion algorithm. For this purpose, the area under prospect was divided into a large number of rectangular prisms in a mesh with unknown susceptibilities. Tikhonov cost functions with two sparsity functions were used to recover the smooth parts as well as the sharp boundaries of model parameters. A pre-selected basis namely wavelet can recover the region of smooth behaviour of susceptibility distribution while Haar or finite-difference (FD) domains yield a solution with rough boundaries. Therefore, a regularizer function which can benefit from the advantages of both wavelets and Haar/FD operators in representation of the 3D magnetic susceptibility distributionwas chosen as a candidate for modeling magnetic anomalies. The optimum wavelet and parameter β which controls the weight of the two sparsifying operators were also considered. The algorithm assumed that there was no remanent magnetization and observed that magnetometry data represent only induced magnetization effect. The proposed approach is applied to a noise-corrupted synthetic data in order to demonstrate its suitability for 3D inversion of magnetic data. On obtaining satisfactory results, a case study pertaining to the ground based measurement of magnetic anomaly over a porphyry-Cu deposit located in Kerman pr of Iran ow Chun deposit was presented to be 3D inverted. The low susceptibility in the constructed model coincides with the known location of copper ore mineralization.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"88 1","pages":"1-18"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84445385","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: 8

Zn(II) Adsorption Study onto Soils of Sarcheshmeh Copper Mine Sarcheshmeh铜矿土壤对Zn(II)的吸附研究

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54634

H. Jalayeri, M. Ziaii, Mohammad Mehdi Salarirad

引用次数: 0

Considering the Epistemic Uncertainties of the Variogram Model in Locating Additional Exploratory Drillholes 考虑变异函数模型在附加勘探钻孔定位中的认知不确定性

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54365

S. Soltani, A. Soltani

引用次数: 1

The Flotation System Optimization in Alborz-Sharghi Coal Washing Plant; A Laboratory Study Alborz-Sharghi选煤厂浮选系统优化实验室研究

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54361

Ahmad Fattahi Mejlej, B. J. Shokri, Masoud Zare Naghadehi

{"title":"The Flotation System Optimization in Alborz-Sharghi Coal Washing Plant; A Laboratory Study","authors":"Ahmad Fattahi Mejlej, B. J. Shokri, Masoud Zare Naghadehi","doi":"10.22059/IJMGE.2015.54361","DOIUrl":"https://doi.org/10.22059/IJMGE.2015.54361","url":null,"abstract":"This paper tries to determine an optimum condition for the flotation operation of the Alborz-Sharghi coal washing plant. For this purpose, a series of comprehensive experiments have been conducted on representative samples from feed of the flotation system of the plant. Four operational variables such as the collector dosage (Fuel oil), the frother dosages (MIBC), the pulp density percent and the impeller speed were taken into account. After obtaining representative samples, 81 required experiments were designed using the orthogonal array (34) of Taguchi method. Three levels of the variables amount including low, base and high were considered for the experiments. The most obvious finding to emerge from this study was that the optimum flotation recovery (61.09 %) is obtained in the base level (L-2) of the collector dosage, the lowest level (L-1) of MIBC and the highest levels (L-3) of the pulp density and the impeller speed. The sensitivity analysis of the variables also indicated that the increase in the collector dosage causes to increase in the total recovery of the flotation and the coal quality. Besides, the largest effect on total recovery was clearly related to the pulp density levels. The increase in values of the pulp density causes to decrease in the recovery values.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"24 11 1","pages":"19-32"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91053462","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

Thermal Analysis: A Complementary Method to Study the Shurijeh Clay Minerals 热分析:研究舒瑞杰粘土矿物的补充方法

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54362

Golnaz Jozanikohan, Fereydoun Sahabi, G. Norouzi, H. Memarian

{"title":"Thermal Analysis: A Complementary Method to Study the Shurijeh Clay Minerals","authors":"Golnaz Jozanikohan, Fereydoun Sahabi, G. Norouzi, H. Memarian","doi":"10.22059/IJMGE.2015.54362","DOIUrl":"https://doi.org/10.22059/IJMGE.2015.54362","url":null,"abstract":"Clay minerals are considered the most important components of clastic reservoir rock evaluation studies. The Shurijeh gas reservoir Formation, represented by shaly sandstones of the Late Jurassic-Early Cretaceous age, is the main reservoir rock in the Eastern Kopet-Dagh sedimentary Basin, NE Iran. In this study, X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopic (SEM) studies, and thermal analysis including differential thermal analysis (DTA), and thermogravimetric analysis (TGA) techniques were utilized in the characterization of the Shurijeh clay minerals in ten representative samples. The XRF studies showed that silica and aluminum oxides are present quantities. The XRD test was then used to determine the mineralogical composition of bulk components, as well as the clay fraction. The XRD patterns indicated the presence of dominant amount of quartz and plagioclase, with moderate to minor amounts of alkali feldspar, anhydrite, carbonates (calcite and dolomite), hematite and clay minerals. The most common clays in the Shurijeh Formation were illite, chlorite, and kaolinite. However, in very few samples, glauconite, smectite, and mixed layer clay minerals of both illite-smectite and chlorite-smectite types were also recognized. The XRD results were quantified, using the elemental information from the XRF test, showing that each Shurijeh exhibited low to moderate amounts of clay minerals, typically up to 21%. The amount of illite, the most dominant clay mineral, reached maximum of 13.5%, while the other clay types were significantly smaller. Based on the use of SEM and thermal data, the results of the identification of clay minerals, corresponded with the powder X-ray diffraction analysis, which can be taken into account as an evidence of the effectiveness of the thermal analysis technique in clay typing, as a complementary method besides the XRD.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"19 1","pages":"33-45"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90637540","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

Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains) 磁化率作为矿产勘查工具(以扎格罗斯山脉南部为例)

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54364

M. Boroomand, A. Safari, A. Bahroudi

{"title":"Magnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains)","authors":"M. Boroomand, A. Safari, A. Bahroudi","doi":"10.22059/IJMGE.2015.54364","DOIUrl":"https://doi.org/10.22059/IJMGE.2015.54364","url":null,"abstract":"Magnetic susceptibility has been extensively used to determine the magnetic properties of rocks for different applications, such as hydrocarbon or mineral explorations. This magnetic quantity can be directly measured in an accurate but time-consuming operation, or it can be mathematically approximated using a reliable procedure to achieve a desired accuracy. The Poisson theory is one of the most well-known approaches which provide a meaningful relationship between the earth’s gravity and magnetic fields to derive the magnetic susceptibility. In this approach, the reliability and efficiency of the derived magnetic susceptibility depends on the method of computation of the gravity gradient tensor. We investigated two different methods of determination of gradient tensor; different distance method and Fourier transform technique. From the investigation, the Fourier transform method was more consistent with the geological features which led to more reliable information required for mineral explorations. The performance of the Poisson theory, the different distance method, and the Fourier transform was investigated in the coastal Fars, in Iran. This was highly disposing for geological and mineral features. Salt domes in the study area were detected and results compared with the available geological map.","PeriodicalId":36564,"journal":{"name":"International Journal of Mining and Geo-Engineering","volume":"99 1","pages":"57-66"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78356937","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: 5

Development of a Dynamic Population Balance Plant Simulator for Mineral Processing Circuits 矿物加工电路动态种群平衡模拟装置的研制

International Journal of Mining and Geo-Engineering Pub Date : 2015-06-01 DOI: 10.22059/IJMGE.2015.54637

F. Khoshnam, M. Khalesi, A. Darban, M. J. Zarei

引用次数: 0