Browsing by Author "Mangalpady, M."

Now showing 1 - 20 of 58

A comparison of limit equilibrium method of slope stability analysis with finite element modelling
(2009) Mangalpady, M.
Stability analysis of slopes susceptible to different types of failures can be performed with different techniques. The selection of an appropriate technique is, therefore, very important in a process of slope stability evaluation. In this paper, slopes of a large surface iron ore mine was analyzed by limit equilibrium method and by finite element modelling. GALENA software was used for analysis by limit equilibrium method and ANSYS for finite element modelling (FEM). Factor of safety (FOS) was calculated by both the methods and they are compared for their applicability. Based on the results obtained by the analysis, conclusions were drawn on the application of these methods. It was found that FEM analysis gives factor of safety value which is found to be lesser than the values determined by limit equilibrium method. This is because it considers more parameters and performs a detailed analysis of stress and strain conditions in the strata under consideration.
A critical review on estimation of rock properties using sound levels produced during rotary drilling
(CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2012) Masood; Vardhan, H.; Mangalpady, M.; Rajesh Kumar, B.
This paper summarizes the critical review on estimation of rock properties using sound levels produced during rotary drilling. In this paper an overall emphasis has been made to summarize the importance of sound level produced during drilling by considering various parameters like drill bit speed, penetration rate, drill bit diameter, type of drill bit and equivalent sound level produced during drilling for the estimation of rock properties. Further an attempt has also made to include the application of ANN modeling and acoustic emission in estimating rock properties. © 2012 CAFET-INNOVA TECHNICAL SOCIETY.
A Review on Application of Innovative Techniques for Sustainable Environmental Management in Mines
(World Researchers Associations, 2025) Sarapur, M.; Mangalpady, M.
This study focuses on the application of innovative techniques for sustainable environmental management in mines. It highlights the importance of minerals as finite and non-renewable natural resources and the role of the mining sector in catering to global energy and industrial needs. It also describes the challenges of waste generation in mining and the need for responsible extraction practices to contribute to national and community development. It emphasizes the significance of the mining industry in India as a core part of the economy. The study delves into waste dump management, exploring the use of coir mats and grass seeds for aesthetic and sustainable plant growth. The adoption of Internet of Things (IoT) technology is proposed for real-time monitoring and management of vegetation in mining areas which includes the use of sensor technology, cloud computing and advanced analytics for ecological monitoring, particularly in forest environments. The study also addresses the need for real-time technology to enhance vegetation, to protect wildlife and to improve the livelihoods of tribal communities. © 2025, World Researchers Associations. All rights reserved.
Advancing solar PV panel power prediction: A comparative machine learning approach in fluctuating environmental conditions
(Elsevier Ltd, 2024) Tripathi, A.K.; Mangalpady, M.; Elumalai, P.V.; Karthik, K.; Khan, S.A.; Asif, M.; Koppula, K.S.
Solar photovoltaic (PV) panels play a crucial role in sustainable energy generation, yet their power output often faces uncertainties due to dynamic weather conditions. In this study, a comparative machine learning approach is introduced, utilizing multivariate regression (MR), support vector machine regression (SVMR), and Gaussian regression (GR) techniques for precise solar PV panel power prediction. The investigation into the impact of environmental factors—solar radiation, ambient temperature, and relative humidity—on PV panel output reveals the superior predictive capabilities of SVMR models. With a mean squared error (MSE) of 0.038, a mean absolute error (MAE) of 0.17, and an R2 value of 0.99, SVMR outperforms GR and MR models. Conversely, Gaussian regression demonstrates comparatively weaker performance, yielding an R2 of 0.88, an MSE of 0.49, and an MAE of 0.63. This research underscores the reliability and enhanced accuracy of the proposed SVMR model in forecasting solar PV panel output. The outcomes presented herein carry significant implications for promoting the widespread adoption of PV panels in electricity generation, particularly in challenging environmental conditions. The findings offer valuable insights into optimizing solar PV deployment, ultimately contributing to the expansion of solar power generation in the national energy landscape. Moreover, the comparative analysis provides insights into how anticipated PV power generation can adapt to varying weather conditions, encompassing factors such as temperature, humidity, and solar radiation. © 2024 The Authors
An analytical hierarchy approach for studying the impact of human error, environmental factors, and equipment failure on mine accidents: a case study in India
(Springer, 2024) Kar, M.B.; Mangalpady, M.; Kunar, B.M.
This paper presents a study using the Analytical Hierarchy Process (AHP) to understand and prioritize the accidents that have occurred in the Indian mining industry. The data for the study was collected from accident reports submitted to the Directorate General of Mines Safety from 2011 to 2020. The accident information was divided into six categories (i.e., accidents due to ground movement, transport machinery, machinery other than transport, explosives, electricity shock, and fall-of-person). These accidents were considered alternatives in the AHP analysis. Three risk factors (i.e., environment, equipment fault, and human error) that caused the accident were considered as criteria in the AHP analysis. The safety expert carefully examined the pattern of accidents and ranked the relative importance of the alternatives with respect to each criterion. This rank was used to build the AHP model using the R programming language and the AHP library (version 0.2.8). The results revealed that the highest number of accidents occurred due to the transport machinery (0.306), followed by accidents due to ground movement (0.232), falls of individuals (0.206), machinery other than transportation (0.122), electricity (0.082), and explosives (0.048). In order to identify the contributing risk factors for each type of mining accident, the weight and the rank of the criteria were determined. The result showed that the most accidents in the six accident categories are due to human error (0.26), followed by environmental (0.25) and equipment faults. The finding of the study provides valuable insights for the mining industry to develop effective strategies to mitigate mine accidents. © The Author(s) under exclusive licence to The Society for Reliability Engineering, Quality and Operations Management (SREQOM), India and The Division of Operation and Maintenance, Lulea University of Technology, Sweden 2024.
Analysis on photovoltaic panel temperature under the influence of solar radiation and ambient temperature
(Institute of Electrical and Electronics Engineers Inc., 2021) Tripathi, A.K.; Ray, S.; Mangalpady, M.
The generation of electrical energy from solar energy is one of the most promising utilization of solar energy technology and it can be achieved by the application of solar photovoltaic (PV) panel. In this paper an experimental study has been conducted to examine the effect of solar radiation and ambient temperature on the surface temperature of the solar photovoltaic panel. With the help of experimental measurements, a multi-linear regression model is developed relating the three quantities. The developed model validated with the actual measured values shows good accuracy with small values of root mean square error. During the study, the recordedvalue of maximum panel temperature was 78.50Â°C for the atmospheric condition which having solar radiation of 1140 W/m2 and ambient temperature of 36Â°C. The developed relation and subsequent outcomes of the study will help the PV panel designers and manufacturers incomprehending the effects of atmospheric parameters on the temperature of the photovoltaic panel. Â© 2021 IEEE
Applications of computer in mining industry with special regard to shovel-dumper productivity
(2007) Mangalpady, M.; Murthy, Ch.S.N.; Pai, R.; Nand, R.
Now-a-days computer is used in every field of engineering, including mining industry, at various stages in various capacities. One of the major problems in surface mining is material handling, which involves transportation of both ore and overburden. Most of the projects make use of shoveldumper system in spite of its huge capital investment and recurring costs. Hence a lot of mind and time has to be devoted before its procurement so as to optimize their number and maximize its utility. This paper addresses various optimization models available for productivity analysis of shovel-dumper fleet. Match factor method is one of the commonly used techniques to know the relative coverage which shovels are getting from truck fleet. Operations research techniques like queuing theory, integer programming, simulation and goal programming consider the probabilistic nature associated with the system. Even though many models are available for optimization and analyzing the productivity of shovel dumper system, further research and study is needed to devise a desirable technique for the same.
Assessment of whole-body vibration in hydraulic rock breaker operators based on operating parameters
(Springer Nature, 2025) Vikram, P.; Mangalpady, M.; Tripathi, A.K.; Ariff, S.; Cherie, A.
The study evaluates the impact of whole-body vibration (WBV) on rockbreaker operators in Indian mechanized quarries. The study was performed on three different operating parameters scenario with varied power and rate such as Operating parameter-(1) Impact power 37.25 HP with impact rate of 420–450 blows/min, Operating parameter-(2) Impact power 43 HP with Impact rate of 350–375 blows/min and operating parameter-(3) Impact power equal to 54 HP with impact rate of 280–300 blows/min. WBV data was collected from five rockbreaker operators using a seat pad tri-axial accelerometer, across three different operating parameters. The results indicated that all the rockbreaker operators exceeded the A(8) based exposure action value (EAV) of 0.5 m/s2 in all the three operating parameters but all the rockbreaker operators in the third operating parameter have exceeded the A (8)-based exposure limit value (ELV) of 1.15 m/s2 and vibration dose value (VDV) based exposure limit value (EAV) of 9.1 m/s1.75. The study’s findings suggest that the vibration amplification for operators working in operating parameter-1 was reduced completely compared to those working in the second and third operating parameters, based on the above “Health Guidance Caution Zone (HGCZ)” for daily vibration exposure, specifically A (8) and VDV (8) measurements, Based on the aforementioned observation, it can be inferred that operating parameter-1 is an advantageous setting, as it minimizes the vibration experienced by the rockbreaker operators. © The Author(s) 2025.
Case study of a hybrid (Wind and solar) power plant
(2011) Jaralikar, S.M.; Mangalpady, M.
The paper highlights the urgency of utilizing and promoting use of non conventional sources, particularly the wind and solar energy, so as to control the environmental pollution, such as ozone layer depletion, deforestation, loss of biodiversity, global warming etc. As a case study, the various performance factors of a 10 kW hybrid (wind and solar) power plant, which is having 60:40 power generation share of wind power to solar power were analysed. The study shows that there is mismatch between the designed and actual plant load factor (PLF), as well as the power generation share of the wind and solar power plant. It was also found that the plant utilization factor (PUF) was poor and that there is very less scope for installation of solar tracking system. Based on the detailed analysis of obtained results, certain recommendations were made for streamlining and optimizing the power generation capacity, and also for better utilization of generated power.
Design and Development of an IoT-Based Gas Monitoring System for Underground Coal Mines
(Springer Science and Business Media Deutschland GmbH, 2023) Tripathi, A.K.; Mangalpady, M.; Rao, N.R.N.V.; Ray, S.
Safety in underground coal mines is a major challenge whenever the mine comprises of toxic gases. The risk of the presence of gas influences the overall productivity of the mines, which is a subject of concern to the mining industry. Therefore, there is a need for real-time monitoring of underground mine environment, so that the miners can be safeguarded in case of presence of toxic gases. In this paper, an attempt was made to evolve and validate an Internet of Things (IoT)-based gas monitoring system for monitoring underground coal mines environment, which includes multiple sensors for real-time measurement of different gases. The developed IoT-based gas monitoring system was tested and validated in the laboratory, under the controlled environmental conditions, for the measurement of carbon dioxide (CO2), carbon monoxide (CO) and methane (CH4) gases. Further, the test results were compared with the readings obtained by the digital multi-gas detector, which confirmed that the developed real-time gas monitoring system yields a good result. Â© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Design of haul road lighting system. Part I: Design based on optimal energy considerations
(2006) Karmakar, N.C.; Mangalpady, M.; Rao, Y.V.; Yaragatti, U.R.
Electrical energy consumption is a major cost component of haul road lighting. Haul road lighting depends on many parameters such as type and wattage of sources, mounting height and tilt angle of light fixtures. In this study a computer model has been developed for optimum energy consumption of any haul road lighting system. Using the program, illumination design was studied for a stretch of 800m long haul road. Nine different types of light sources were considered for mounting heights of 12 and 16m. High-pressure sodium vapour (HPSV) lamps of 100W proved to be energy efficient at a 12m height whereas at 16m height, energy consumption was minimum for 150 W HPSV lamps. Thus the developed computer program proved to be successful in evaluating the performance of lighting designs from the point of view of energy consumption.
Design of haul road lighting system. Part II: Design based on optimal cost considerations
(2006) Karmakar, N.C.; Mangalpady, M.; Rao, Y.V.; Yaragatti, U.R.
The proper selection of lighting installations is very important for the provision of cost-effective lighting systems without compromising light quality. In this study a computer program was developed to evolve a cost-effective lighting system for haul roads in surface mines. This program is beneficial in assessing the viability of various lighting installations in order to achieve cost-effective solutions. Using the program, illumination design was studied for an 800 m long stretch of haul road. Nine different types of light sources were considered at mounting heights of 12 m and 16 m. The study shows that at a 12 m mounting height, 100 W high-pressure sodium vapour (HPSV) lamps offer the most cost-effective design, followed by 250 W HPSV lamps. In the case of 16 m pole heights the annual lighting cost is minimum for 150 W HPSV lamps, followed by 250 W HPSV lamps. This work also shows that optimum design based on energy consumption need not be the same as design based on optimum cost considerations as cost parameters may vary widely with location.
Design of haul road lighting system. Part III: Application
(2006) Karmakar, N.C.; Mangalpady, M.; Rao, Y.V.; Yaragatti, U.R.
The design of haul road illumination systems based on a scientific approach is very important. Improperly planned lighting systems may provide unsatisfactory illumination and may also incur higher costs. This paper describes illumination systems designed for two haul roads using the computer programs developed in earlier stages of this work. System performances and cost are compared with the existing illumination system. Designs based on the developed programs show total potential cost savings of approximately 26% and 48% for the two systems.
Design of lighting system for surface mine projects
(Universitas Ahmad Dahlan thsutikno@ieee.org, 2012) Mangalpady, M.; Jaralikar, S.M.
Indian mining illumination standard is based on incident light without mentioning about uniformity ratio, but International Commission on Illumination (CIE), Austria insists uniformity ratio. In a mine with low surface reflectance, the surrounding illumination level is lower than the minimum lighting standard as specified by various regulatory bodies. The surface brightness further reduces in wet surface condition, and results in poor visibility. In the present study, design was made both in mineral and overburden benches based on the minimum acceptable reflected light and the reflected uniformity ratio. For the purpose of comparison of various types of lighting systems, a stretch of 1.0 km long haul road was considered. The design was attempted with five different types of luminaries. Lamp mounting heights were varied at five steps, namely 8, 10, 12, 14 and 16 m. Design under wet condition incurs an excess cost 9.4 % for mineral bench and 50 % for overburden bench haul roads. Designing under wet surface condition ensures the minimum light level even under the worst condition of surface reflectivity, with marginal increase in cost. © 2012 Universitas Ahmad Dahlan.
Designing cost-effective lighting system for surface mine projects
(2006) Mangalpady, M.; Karmakar, N.C.; Rao, Y.V.
The objective of lighting in mines is to provide good illumination, which improves the safe and efficient working environment. The artificial lighting is very much essential for the sustained production, to meet the ever-growing demand of the mineral industry. Haul roads within the pit are one of the critical areas in surface mines where lighting installations are not permanent due to regular movement of faces. Though the initial investment for the lighting is very less compared to total project cost, the annual cost is considerably high against the running cost of the project. The proper selection of lamps, reflectors, mountings etc., for particular type of work is very important for energy efficient lighting system, without compromising with the quality of light. A computer model has been developed to evolve a cost effective lighting system for surface mine projects. This model helps in assessing viability of various light sources, so as to achieve energy effective solutions. Properly designed lighting system can prove to be a very cost effective investment for the mine owner.
Development and Evaluation of Dust Cleaning System for a Solar PV Panel
(University of Kuwait, 2022) Tripathi, A.K.; Mangalpady, M.; Ray, S.; Rao, N.R.N.V.; Vamshi Krishna, S.; Durgesh Nandan, D.
The most promising application of solar energy is the conversion of solar energy into electrical energy by using solar photovoltaic (PV) panel. The performance of solar based PV panel is definitely influenced by the amount of solar radiation, which are reaching on the panel surface. Since the solar PV panels are operating in open atmosphere dust particles get deposited on their surfaces and most of the times they have to work in this condition. These deposited dust particles create a layer of dust particles over the panel surface which prevents the 100% penetration of solar radiation into the panel surface. Therefore, proper cleaning of the panel surface becomes very necessary. In order to improve the performance of the PV panel an automatic microcontroller driven dust cleaning technique is developed which is capable of removing the accumulated dust particles from the PV panel surface. Moreover, an experimental study has been performed to analyse the efficiency of this developed techn ique. The developed cleaning system showed an improvement of 27.98% in the output power of PV panel when compared to the dusty panel. © 2022 University of Kuwait. All rights reserved.
Development of Regression Model and Optimization of Mechanical Properties of Geopolymer Concrete Prepared Using Gold Ore Tailings
(American Society of Civil Engineers (ASCE), 2023) Lokesha, E.B.; Mangalpady, M.; Kumar Reddy, S.K.; Srinivasa, A.S.
In this study, 11 mix proportions of geopolymer concrete (GPC) beam and cylinder samples were prepared by partially replacing the class F fly ash (FA) as the binder with ground granulated blast furnace slag (GGBFS) in steps from 10% to 100%, along with gold ore tailings (GOTs) [as a partial substitute to the river sand (RS) in steps from 5% to 30%] and recycled coarse aggregates (RCAs). The laboratory tests demonstrated a maximum split tensile strength of 5.99 MPa and flexural strength of 7.98 MPa for Sample GOT-11-15 (11 indicates Mix Proportion-XI and 15 indicates 15% of GOTs) of Mix Proportion-XI. In addition to the previous 11 mix proportions, one more set of cylinders and beams was prepared using FA, GOTs, and natural coarse aggregates (NCAs), which are designated as Mix Proportion-XII. For Mix Proportion-XII, the highest split tensile strength of 4.17 MPa and flexural strength of 6.13 MPa was achieved for Sample GOT-15 (15 indicates 15% of GOTs). Among the 12 types of mix proportions, Sample GOT-0 of Mix Proportion-XII (i.e., FA 100%, GOT 0%, and NCAs 100%) showed a maximum slump value of 89.3 mm. Sample GOT-1-0 of Mix Proportion-I (i.e., FA 100%, GOT 0%, and RCA 100%) exhibited the maximum slump of 65.3 mm. The field emission scanning electron microscopy (FESEM) analysis indicated that silicon (Si) and aluminum (Al) were the two main constituents of the GOTs and FA. In addition, this analysis revealed the existence of uneven forms of quartz particles in GOTs and the spherical shapes of the FA particles that adhered to the RCAs. The multiple regression analysis exhibited the root mean square (R2) values of 89.0% and 85.5%, respectively, for the split tensile and flexural strengths. The p-value for the developed model was <0.05; therefore, the developed model was considered significant and the best-fit model. © 2023 American Society of Civil Engineers.
Durability characteristics of geopolymer concrete produced using gold ore tailings along with recycled coarse aggregates
(Nature Research, 2025) Lokesha, E.B.; Mangalpady, M.; Kumar Reddy, S.K.
The Gold Ore Tailings (GOTs) are one of the major waste materials in the mining sector. The disposal of these tailings could be a problem for human health and a major environmental concern for several years. In this research work, the GOTs were used as an alternative material to the River Sand (RS) in the production of Geopolymer Concrete (GPC). Thus developed GPC samples were tested for its durability characteristics, such as resistance to sulphates and chlorides. The sulphate attack test was conducted by immersing the Conventional Concrete (CC) and GPC samples in 5% Magnesium Sulphate (MgSO4) solution for various curing periods. In this test, the GPC samples showed a reduction in compressive strength and weight, which is slightly more when compared to CC samples. The Rapid Chloride Penetration Test (RCPT) was also conducted to know the chloride ion penetration in which GPC samples exhibited less chloride penetration when compared to CC samples. Further, the Toxic Characteristic Leaching Procedure (TCLP) analysis showed that the GOTs have very high concentrations of hazardous metals. However, the concentration of Cyanide (CN?) was minimal in GOTs. In this regard, geopolymerization would be a better method for immobilizing the hazardous metals in GOTs. © The Author(s) 2025.
Effect of injection pressure on output of a CI engine fuelled with raw Cardanol and kerosene blends
(Elsevier Ltd, 2023) Ravindra, n.; Mangalpady, M.; Vardhan, H.
This study was aimed towards the investigation of effect of injection pressure on the performance of a CI engine run with various blends of raw Cardanol and kerosene. Three different volumetric blends of kerosene and cardanol (i.e., BK40, BK30 and BK20) were tested in diesel engine at 180 bar, 200 bar and 220 bar injection pressure. The results of the study indicated that at increased injection pressure brake thermal efficiency (BTE) increased with reduction in brake specific fuel consumption, unburned hydrocarbon and smoke. The maximum thermal efficiency of 31.34% was observed for BK30 blend at 220 bar and it was 31.97% for diesel fuel. Hence, this study reveals that kerosene cardanol blend can be used as CI engine fuel with proper tuning of injection parameters. Â© Â© 2023 Elsevier Ltd. All rights reserved.
Efficient artificial lighting system for surface mine haul roads
(2006) Mangalpady, M.; Yaragatti, U.R.
Haul roads within the pit are one of the critical areas in surface mines where lighting installations are not permanent due to regular advancement of the working face. Due to this reason it is very difficult to maintain the lighting standards, as specified by various regulatory bodies. Lighting in mines presents special problems because of the dark surroundings and low surface reflectance. Hence, scientific design of artificial lighting is very important to achieve the minimum required lighting standards. Authors developed software, named SURLux, in MATLAB for design of illumination system, which incorporates all the design parameters. It also computes the total cost of the lighting system. In this paper a 1.0 km stretch of haul road is designed for four different types of sources namely, 150 and 250 W high pressure mercury vapor lamps (HPMV), and 150 and 250 W high pressure sodium vapor lamps (HPSV), at various pole heights (8, 10, 12, 14 and 16 m). From the results of the study it is observed that with 16 m height pole the total annual cost for 150 W HPSV is the minimum (Rs. 87,739/-). In most of the cases the cost is high with HPMV lamps. This is mainly because of their shorter life and relatively more number of poles. In general, lamp selection is made mainly based on efficacy and suitability to each situation. However, among the feasible alternatives for any project, the variant that offers the minimum total cost is finally selected. Â© 2006 IEEE.