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Prediction of rotary drilling penetration rate in iron ore oxides using rock engineering system

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International Journal of Mining Science and Technology 2018年第3期28卷 407-413页

作者： Hossein Inanloo Arabi Shad Farhang Sereshki mohammad ataei mohammad Karamoozian Department of Mining Petroleum and Geophysics Shahrood University of Technology

Prediction of the drilling penetration rate is one of the important parameters in mining operations. This parameter has a direct impact on the mine planning and cost of mining operations, Generally, effective parameters on the penetration rate is divided into two classes： rock mass properties and specifications of the machine, The chemical components of intact rock have a direct effect in determining rock mechan- ical properties, Theses parameters usually have not been investigated in any research on the rock drill- ability, In this study, physical and mechanical properties of iron ore were studied based on the amount of magnetite percent, According to the results of the tests, the effective parameters on the pen- etration rate of the rotary drilling machines were divided into three classes： specifications of the machi- nes, rock mass properties and chemical component of intact rock, Then, the rock drillahility was studied using rock engineering systems, The results showed that feed, rotation, rock mass index and iron oxide percent have important effect on penetration rate, Then a quadratic equation with 0,896 determination coefficient has been obtained, Also, the results showed that chemical components can he described as new parameters in rotary drill penetration rate,

关键词： Penetration rate Rotary drill Rock engineering system Chemical components

A new framework for evaluation of rock fragmentation in open pit mines

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第2期11卷 325-336页

作者： mohammad Babaeian mohammad ataei Farhang Sereshki Farzad Sotoudeh Sadjad mohammadi Faculty of Mining Engineering Petroleum and GeophysicsShahrood University of Technology

The main purpose of blasting in open pit mines is to produce the feed for crushing stage with the optimum dimensions from in situ rocks. The size distribution of muck pile indicates the efficiency of blasting pattern to reach the required optimum sizes. Nevertheless, there is no mature model to predict fragmentation distribution to date that can be used in various open pit mines. Therefore, a new framework to evaluate and predict fragmentation distribution is presented based on the image analysis approach. For this purpose, the data collected from Jajarm bauxite mine in Iran were used as the sources in this study. The image analysis process was performed by Split-Desktop software to find out fragmentation distribution, uniformity index and average size of the fragmented rocks. Then, two different approaches including the multivariate regression method and the decision-making trial and evaluation laboratory(DEMATEL) technique were incorporated to develop new models of the uniformity index and the average size to improve the Rosin-Rammler function. The performances of the proposed models were evaluated in four blasting operation sites. The results obtained indicate that the regression model possesses a better performance in prediction of the uniformity index and the average size and subsequently the fragmentation distribution in comparison with DEMATEL and conventional Rosin-Rammler models.

关键词： Rock fragmentation Image analysis Open pit mine Split-desktop software package Decision-making trial and evaluation laboratory(DEMATEL)technique

Monte Carlo Analytic Hierarchy Process (MAHP) approach to selection of optimum mining method

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International Journal of Mining Science and Technology 2013年第4期23卷 561-566页

作者： ataei mohammad Shahsavany Hashem Mikaeil Reza Faculty of Mining Petroleum and Geophysics Engineering Shahrood University of Technology Faculty of Mining Engineering Kordestan University Faculty of Mining Engineering Uromia University of Technology

One of the most critical and complicated steps in mine design is a selection of suitable mining method based upon geological,geotechnical,geographical,safety and economical *** aim of this study is developing a Monte Carlo simulation to selection the optimum mining method by using effective and major criteria and at the same time,taking subjective judgments of decision makers into *** approach is based on the combination of Monte Carlo simulation with conventional Analytic Hierarchy Process(AHP).Monte Carlo simulation is used to determine the confdence level of each alternative’s score,is calculated by AHP,with the respect to the variance of decision makers’*** proposed method is applied for Jajarm Bauxite Mine in Iran and eventually the most appropriate mining methods for this mine are ranked.

关键词： Multi-criteria decision making AHP Monte Carlo simulation Mining method selection

Application of a fuzzy analytical hierarchy process to the prediction of vibration during rock sawing

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Mining Science and Technology 2011年第5期21卷 611-619页

作者： Mikaeil Reza ataei mohammad Yousefi Reza Faculty of Mining Petroleum & Geophysics Shahrood University of Technology Shahrood 36155-316 Iran Faculty of Mining Petroleum & Geophysics Shahrood University of Technology Shahrood 36155-316 Iran Faculty of Mechanics Sharif University of Technology Tehran Irana

A new predictive model for evaluating the vibration of a sawing machine was developed using a new rock classification system. The predictors are machine parameters and a rock sawability index. The new rock classification system includes four major parameters of the rock： uniaxial compressive strength, abrasiv- ity index, mean MoWs hardness, and Young＇s modulus. The FAHP approach was used when determining the weights of these parameters by six decision makers. Two groups of carbonate rocks were sawn using a fully-instrumented laboratory sawing rig at different feed rates and depths of cut. During the sawing trials system vibration was monitored as a measure of saw performance. Then, a new statistical model was obtained by multiple regression on the machining parameters and the rock sawability index. The model is very useful for the evaluation of the system vibration, and for selecting suitable machining parameters, from a limited set of mechanical properties.

关键词： Sawability FAHP Classification Vibration

Mineral processing plant location using the analytic hierarchy process——a case study:the Sangan iron ore mine(phase 1)

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Mining Science and Technology 2010年第5期20卷 691-695页

作者： SAFARI Mohsen ataei mohammad KHALOKAKAIE Reza KARAMOZIAN mohammad Faculty of Mining Engineering Petroleum & GeophysicsShahrood University of Technology

Locating the mineral processing plant near a mine is the most important parameter that affects the whole *** factors,and their preferences,should be considered in this *** factors include economical,geological,technical,environmental and tectonic parameters.A multi-criteria decision making method is necessary to rank the *** this paper we describe how plant location is selected by using the Analytic Hierarchy Process(AHP).This method,with eight criteria,was used to select a location for the mineral processing plant at the Sangan iron ore mine(phase 1).Three alternatives for the processing plant were *** main criteria were distance from the mine,access to heavy machinery transport,the amount of excavation required for grading,bed mixture capacity,belt conveyor length,distance from the tailing dam,distance from the waste dumps and surface water diversion ***,the alternatives were ranked and the best location was proposed.

关键词： mineral processing multi-criteria decision making Sangan iron ore mine AHP

Presenting an engineering classification system for coal spontaneous combustion potential

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International Journal of Coal Science & Technology 2017年第2期4卷 110-128页

作者： Amir Saffari Farhang Sereshki mohammad ataei Keramat Ghanbari Faculty of Mining Petroleum and Geophysics EngineeringShahrood University of Technology Daneshgah Blvd.P.O. Box *** Shahrood Iran HSE Management of Eastern Alborz Coal Mines Company Shahrood lran

The phenomenon of coal spontaneous combustion is one of the common hazards in coal mines and also one of the important reasons for the loss of coal in piles and mines. Based on previous researches, different types of coals have different spontaneous combustion characteristics. For coal loss prevention, a measure is necessary for prediction of coal spontaneous combustion. In this study, a new engineering classification system called ＂Coal Spontaneous Combustion Potential Index （CSCPI）＂ is presented based on the Fuzzy Delphi Analytic Hierarchy Process （FDAHP） approach. CSCPI classifies coals based on their spontaneous combustion capability. After recognition of the roles of the effective parameters influencing the initiation of a spontaneous combustion, a series of intrinsic, geological, and mining characteristics of coal seams are investigated. Then, the main stages of the implementation of the FDAHP method are studied and the weight of each parameter involved is calculated. A classification list of each parameter is formed, the CSCPI system is described, and the engineering classifying system is subsequently presented. In the CSCPI system, each coal seam can be rated by a number from 0 to 100; a higher number implies a greater ease for the coal spontaneous combustion capability. Based on the CSCPI system, the propensity of spontaneous combustion of coal can be classified into three potential levels： low, medium, and high. Finally, using the events of coal spontaneous combustion occurring in one of the Iranian coal mines, Eastern Alborz Coal Mines, an initial validation of the mentioned systematic approach is conducted. Comparison of the results obtained in this study illustrate a relatively good agreement.

关键词： Coal Classification Coal Spontaneous Combustion Potential Index (CSCPI) Fuzzy Delphi AnalyticHierarchy Process (FDAHP) Eastern Alborz Coal Mines

Reliability-based maintenance scheduling of hydraulic system of rotary drilling machines

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International Journal of Mining Science and Technology 2013年第5期23卷 771-775页

作者： mohammad Javad Rahimdel mohammad ataei Reza Khalokakaei Seyed Hadi Hoseinie Faculty of Mining Engineering Sahand University of Technology Faculty of Mining Engineering Geophysics and PetroleumShahrood University of Technology Division of Operation and Maintenance Engineering Lulea University of Technology

Hydraulic system has a critical and important role in drilling *** failure in this system leads to problems in power system and machine *** the failure cannot be prevented entirely,it is important to minimize its *** is one of the most effcient and important method to study safe operation probability of hydraulic *** this research,the reliability of hydraulic system of four rotary drilling machines in Sarcheshmeh Copper Mine in Iran has been *** data analysis shows that the time between failures(TBF)of Machines A and C obey the Weibull(2P)and Weibull(3P)distribution,***,the TBF of Machines B and D obey the lognormal *** regard to reliability plots of hydraulic systems,preventive reliability-based maintenance time intervals for 80%reliability levels for machines in this system are 10 h.

关键词： Reliability Drilling Hydraulic Maintenance

Simultaneous effects of joint spacing and joint orientation on the penetration rate of a single disc cutter

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Mining Science and Technology 2011年第4期21卷 507-512页

作者： Bejari Hadi Kakaie Reza ataei mohammad Khademi-Hamidi Javad Faculty of Mining Petroleum and Geophysics EngineeringShahrood University of TechnologySemnanIran Faculty of Mining Petroleum and Geophysics EngineeringShahrood University of TechnologySemnanIran Faculty of Mining Metallurgy EngineeringAmirkabir University of TechnologyTehranIran

This paper describes the influence of joint spacing and joint orientation on the penetration rate of a Tunnel Boring Machine （TBM） disc cutter as modeled by the Discrete Element Method （DEM）. The input data for the siLmulations were obtained from the sandstone along the AIborz tunnel that is currently being excavated in Iran using a 5.2 m diameter open TBM. Three joint spacings, 150, 200, and 300 mm, were modeled together with seven values of joint orientation; 0°, 15°, 30°, 45°, 60°, 75°, and 90°. The results show that the penetration increases when joint orientation increases from 0° to 75°, but it decreases as the joint orientation increases further from 75° to 90°. This is true for each joint spacing. In addition, for a given joint orientation increasing the joint spacing causes the TBM penetration to decrease. The optimum joint orientation, from the viewpoint of TBM penetration, is about 60-75°.

关键词： Joint orientation Joint spacing TBM DEM

Sliding Mode PID-Controller Design for Robot Manipulators by Using Fuzzy Tuning Approach

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Sliding Mode PID-Controller Design for Robot Manipulators by...