Devi Prasad Mishra

• B. E., M. Tech & Ph.D.(Mining)
• Professor (Associate) at Indian Institute of Technology Dhanbad

Since their inception, the deep mines have faced the challenges of spontaneous heating and fire. The study examines the impact of coal seam depth and particle size on the spontaneous combustion of coal. A spontaneous heating study of seven coal samples shows moisture, volatile matter, and ash do not exhibit any clear trend except for fixed carbon,...

The occurrence of explosions in coal mines is responsible for significant loss of life and extensive property damage. The flame propagation and severity of coal dust explosions depend on various parameters. This paper investigates the explosion flame propagation behavior of coal dust using the Godbert-Greenwald apparatus in conjunction with a high-...

The present invention relates to developing apparatus and methodology for multiparameter coal spontaneous combustion and quasi-steady state assessment. The device features an insulated cubicle heating cavity with a programmable temperature controller, a multi-gas manifold for reaction control, and a coal reaction vessel encapsulating pulverised coa...

The low-temperature oxidation of coal remains a significant precursor of the prevailing fire hazard in the coal mining industry. This study examines the thermal stability, heat transfer dynamics, and gas emission profiles of coal samples from Indian mines to understand the factors influencing spontaneous combustion. Using a novel dual-phase heating...

Coal dust explosions pose a significant safety concern in underground coal mines. Therefore, prevention and suppression of coal dust explosions in underground coal mines is of paramount significance. This paper experimentally determines the rock dust inertant (limestone and dolomite) requirements for the suppression of coal dust explosion using a G...

The mining operation is a challenging field for human development. Deep underground mining has increased as a result of the lack of economic minerals close to the surface of the ground. Mining companies are now thinking of backfilling mine wastes to prevent mine collapse during later and deeper extraction stages due to safety and environmental conc...

This paper presents a study on airborne dust concentrations in a mechanized underground metalliferous mine using high-resolution real-time aerosol spectrometers. The study found that despite the lack of visible dust and mining operations near the study locations, the average total airborne dust (TAD) concentrations at two locations A and B were 117...

Coal has been a major source of electricity generation in India, which is providing a reliable and consistent supply of power. It has helped to meet the growing energy demand of a rapidly expanding economy and population. India has substantial coal reserves, which has allowed the country to reduce its reliance on imported energy sources and enhance...

The air leakage in goaf of a methane rich longwall panel and the methane-based hazardous underground coal mine environment that consequently develops has led to catastrophic losses in the past. In this study, the computational fluid dynamics (CFD)-based simulations of a longwall panel in a methane-rich inclined coal seam of the Moonidih mine in Ind...

Coal has been a major source of electricity generation in India, which is providing a reliable and consistent supply of power. It has helped to meet the growing energy demand of a rapidly expanding economy and population. India has substantial coal reserves, which has allowed the country to reduce its reliance on imported energy sources and enhance...

Deep underground coal mines in India are particularly vulnerable to spontaneous heating/fire accidents, which put miners’ safety and mines at risk. Spontaneous heating leading to fire and explosion results in substantial financial losses for the mining industry. This study examines practical methods for the prevention of spontaneous heating/fire in...

Geological sequestration of CO 2 Read Online Article Recommendations in a coal seam is considered an attractive option to reduce the carbon footprint. It has an additional advantage of enhancing the recovery of coalbed methane, which has less sorption affinity toward coal in comparison to CO 2 . Desorption of gases from coal is controlled by variou...

Methane drainage from coal seams is a complex process. Quantification of the geological and microstructural characteristics of the coal matrix is of utmost importance to assess the migration of methane for the success of methane drainage from coal seams. This research makes a comprehensive assessment of the methane drainage potential of two gassy c...

Cemented paste backfilling (CPB) in underground mines is a widely accepted backfilling technique. It has plenty of scope for application in Indian underground mines. Both the uniaxial compressive strength (UCS) and tensile strength (TS) are the essential CPB design parameters. During adjacent stope extraction, minor principal stresses in the backfi...

Heat stress in underground coal mines is a major threat to the health and safety of the miners. Hence, managing heat and prediction of heat stress in advance is essential for maintaining a safe, healthy, and productive underground mine environment. In this study, an extensive ventilation survey has been carried out in three different deep and mecha...

Spontaneous combustion of coal leading to mine fire is a major problem in most of the coal mining countries in the world. It causes major loss to the Indian economy. The liability of coal to spontaneous combustion varies from place to place and mainly depends on the coal intrinsic properties and other geo-mining factors. Hence, the prediction of sp...

Methane-based inflammable underground coal mine environment has led to catastrophic losses in the past. Migration of methane from the working seam and desorption region above and below the seam causes explosion hazard. In this study, the computational fluid dynamics (CFD)-based simulations of a longwall panel in a methane-rich inclined coal seam of...

The innovative transportation system is a pertinent need for the mining industry. Truck haulage is currently the most common mode of mineral transportation between the excavation sites and end use plants. However, besides being resource-intensive and inefficient, this mode of transportation accounts for a high number of accidents and injuries. In o...

This paper critically analyzes data on major explosions that have occurred at Indian coal mines over the past 120 years (1900-2020). An estimated 71.79% of mine explosions and 90.68% of associated casualties in India have occurred in Jharkhand and West Bengal states. However, the number of mine-related accidents and casualties attributable to explo...

Solid waste is currently produced in substantial amounts by industrial activities. While some are recycled, the majority of them are dumped in landfills. Iron and steel production leaves behind ferrous slag, which must be created organically, managed wisely and scientifically if the sector is to remain more sustainably maintained. Ferrous slag is t...

Thermal properties of pulverized coal govern the heat transfer and greatly influence the coal dust explosion and spontaneous combustion processes. This study measures the thermal properties of five coal samples at six distinct particle sizes using an advanced thermal property analyzer. The thermo-physical properties of coal dust positively correlat...

Nowadays, mechanised scaling is extensively used in fully mechanised underground metalliferous mines (FMUMM) for removing potentially dangerous loose rocks from the mine roof and side walls. This study measures and analyses the generation and dispersion of airborne dust due to mechanised scaling operation by scaler in cross-cut (X-cut) drive of an...

Project Title: Experimental and Numerical Investigations of Coal Spontaneous Combustion Kinetics and Mine Fire Using Newly Developed SHT Method Concerning Indian Coalfields Principal Investigator: Tanmay Dasgupta, Assistant Professor, Department of Mining Engineering, BIT Sindri, Dhanbad Co-Investigator: Prof. (Dr.) D. P. Mishra, Head of the Depa...

Lag on ignition (LOI) of coal dust cloud greatly influences the initiation and propagation of coal dust explosion. This paper investigates the effects of coal dust particle size, dust concentration, ignition temperature, and dust dispersion pressure on LOI of coal dust clouds using Godbert-Greenwald furnace along with a high-speed camera. LOI of co...

Underground mines embroil several occupational hazards, including airborne dust generation from various mining operations. Line-of-sight remote Load Haul Dumper (LHD) mucking is adopted to draw the blasted muck from unsupported open stopes in underground metalliferous mines. Assessment of particulate matter (PM) concentrations and remote LHD operat...

Working against nature and an uncertain environment makes underground mining a hazardous profession. Every year hundreds of miners lose their valuable lives due to mine hazards. Increasing demand for coal necessitates the extraction of coal at a higher rate. As a result, easily minable shallow coal deposits are depleting speedily, and in near futur...

Switching from conventional mining to mass production technology is the need of the hour to meet the ever-increasing coal demand of the country. Consequently, today's focus is primarily on mine planning for successful implementation of mass production technology in Indian coal mines. As per existing norms, i.e., Coal Mines Regulations No. 153 sub c...

The increasing demand for coal and depletion of shallow depth reserves are pushing towards deeper mining. In deeper coal mines with multiseam workings, the problem of ventilation surges many folds primarily related to air quantity requirement, heat, humidity and spontaneous heating/fire in goaved (gobbed) out areas. The paper describes the design o...

Workplace comfort studies have been undertaken in a variety of sectors worldwide. In some countries, studies on the underground coal mine thermal environment have also been carried out. However, no analogous studies have been conducted on the thermal comfort of miners working in Indian mass production panels (MPPs). This study was conducted on 14 M...

Thermal properties of pulverized coal govern the heat transfer and greatly influence the coal dust explosion and spontaneous combustion processes. This study measures the thermal properties of five coal samples at six distinct particle sizes using an advanced Thermal Property Analyzer. The thermo-physical properties of coal dust positively correlat...

The rising energy demand especially in developing nation puts a pressure on thermal energy and necessitates production of coal in higher rate. Due to higher rate of coal excavation, easily minable shallow deposits are depleting and deep-seated deposits are left for mining. As the mine are going deeper, the mine ventilation engineers face lots of ch...

Characteristics of pulverized coals have significant influence on the spontaneous combustion and explosion processes. This paper presents an experimental and theoretical framework on physico-chemical characteristics of coal and their interrelations from spontaneous combustion and explosion perspectives. The chemical properties, morphology, bulk den...

Dispersing coal dust to a safe level near the mining face is of utmost importance for maintaining a safe and healthy workplace environment in any mine. The huge amount of coal dust generated during coal winning near a mine development heading is generally dispersed through auxiliary ventilation systems. In this study, dispersion of coal dust in a c...

This study examines the effects of intrinsic properties, particle size, and specific surface area (SSA) of coal on spontaneous combustion. Moreover, it analyzes the underlying mechanism of spontaneous combustion from particle size, SSA and gas adsorption perspectives. The susceptibility of coal to spontaneous combustion is studied by wet-oxidation...

Underground mines have several occupational hazards, including airborne dust generated from various mining operations. Line-of-sight remote LHD mucking is adopted to draw the blasted muck from unsupported stopes in underground metalliferous mines. Investigation on particulate matter (PM) at remote operator location is crucial for assessing the oper...

Heat stress is a major concern for the health, safety and productivity of miners working in hot and humid underground mines. At greater depth, heat inside underground mines increases due to geothermal gradient, heat released from high-capacity machinery, exposed rock surface, auto-compression of air, human metabolism, etc. Prolonged physical work i...

Working against nature and uncertain environment makes underground mining a hazardous profession. Every year hundreds of miners lose their valuable lives due to mine hazards. Increasing demand for coal necessitates the extraction of coal at a higher rate. As a result, easily minable shallow coal deposits are depleting speedily, and in near future,...

An enormous amount of waste materials (tailings, fly ash and slag) are generated during mineral processing, power generation and metallurgical processes. A vast literature on utilising mill tailings for paste backfilling, fly ash and slag as partial replacement to cement is available. However, a detailed review on the application of mill tailings,...

The present investigation is intended to develop the stabilization and transportation behavior of fly ash slurry (FAS) using the mixture of the surfactants, namely, Sapindus laurifolia (S. laurifolia, natural) and sodium dodecyl sulfate (SDS, synthetic). In addition to the rheological study, an attempt has been made to remove the toxic and other tr...

The present study evaluates the transportation, leaching, and stabilization ability of novel saponin extracted from the fruits of Acacia auriculiformis. To enhance the dispersing behavior of the fly ash slurry (FAS) at a lower dosage of sodium silicate, A. auriculiformis was incorporated in FAS. In addition to the rheological study, an attempt has...

Characteristics of pulverized coals have significant influence on the spontaneous combustion and explosion processes. This paper presents an experimental and theoretical framework on physico-chemical characteristics of coal and analyzes their interrelations from spontaneous combustion and explosion perspectives. The chemical properties, morphology,...

In underground metalliferous mines, declines serve as one of the primary intake airways. The intake air in declines gets contaminated by dust, gas, heat, and diesel particulate matter (DPM) generated due to the low-profile dump truck (LPDT) haulage. In this study, the generation and dispersion of airborne dust due to loaded LPDT haulage against ven...

Pyrolysis is a promising technique used to produce oil, syngas, and char of high utility. This work investigates the pyrolytic products and char yields of nine different Indian coals collected from various coal subsidiaries through analytical fast pyrolysis. Coal pyrolysis was performed at 750°C with a single-shot micro pyrolyzer interfaced with ga...

A B S T R A C T Mining operations are inherently associated with dust generation, which is detrimental to cleaner production in mines. Exposure to airborne respirable dust causes serious health hazards to the miners. This paper critically reviews the different dust generating sources in fully mechanised underground metalliferous mines (FMUMM). More...

Dispersing methane to a safer level is crucial for mines safety as methane has been the greatest contributor of explosion hazard in underground coal mines worldwide. Methane dispersion is affected by several geo-mining factors. This study is first of its kind, which makes an attempt to develop a model for predicting methane concentration in undergr...

Paste backfilling is an incipient underground mine backfill technology in India. It facilitates maximum use of mill tailings with enhanced stability of the underground workings and minimises rehandling of water, as well as provides bulk disposal of mining solid waste. Binder type and dosage plays an important role in paste backfill performance. Thi...

Iron is the fourth most common element and the second most abundant metallic element in the earth's crust. It is world's one of the most commonly used metal and primary raw material used in the steel industry. The largest concentration of iron ore is found primarily in banded sedimentary formations of Precambrian age. Iron ores of India have enormo...

The increasing popularity of paste backfilling demands alternative binder optimisation and bulk waste disposal. This study investigates the efficacy of fly ash (FA) as partial replacement of ordinary portland cement (OPC) for paste backfill application in underground mines. The effect of FA addition on uniaxial compressive strength (UCS) and cohesi...

Underground coal mines are susceptible to many kinds of hazards. Mine fire is one of the most vulnerable threats that leads to loss of human lives and other resources inside the mines. Hence, continuous monitoring of underground coal mines is very important for early detection of mine fire. Nowadays, wireless sensor networks are being widely used f...

Solid-to-water proportion decides the effectiveness of paste backfill in terms of transportation characteristics during mine backfilling. This article highlights various laboratory tests conducted to determine the optimum solid-to-water ratio. Also, numerical simulation was carried out using computational fluid dynamics technique (ANSYS FLUENT) to...

Surface disposal of mill tailings and fly ash is a major concern for many countries, as it pollutes the environment including air, water, and soil. Paste backfilling is an emerging mine backfilling technique, wherein the industrial wastes such as mill tailings, fly ash and blast furnace slag are backfilled inside the stopes. This study examines the...

Coal dust explosion constitutes an ever-present hazard in underground coal mines worldwide. This study examines the effects of important parameters, such as, dust particle size, dust concentration and dust-dispersion-air pressure on rock dust inertant requirement for suppressing coal dust explosion using a Godbert-Greenwald (GG) furnace. It also el...

In this paper we have considered the Sun-Earth elliptic restricted three-body problem with radiation effect and analyzed the motion of an infinitesimal mass. Using perturbation technique we obtained the semi analytical expressions for the location of collinear points and analyse the influence of radiation on collinear points. The stability of trian...

The fine dust particles produced during production poses serious health hazard to the miners and decreases mine productivity. Hence, effective dispersion of dust to a safer level is of paramount significance. This paper presents monitoring of dust concentration using Grimm Aerosol Spectrometer (Model 1.108) and establishes a best combination of aux...

The present study investigates the effects of three important parameters, namely, particle size, dust concentration and dust-dispersion-air pressure on Minimum Ignition Temperature (MIT) and explosion process of coal dust cloud using Godbert-Greenwald furnace. The coal sample collected from Jharia Coalfield, India was used for experimentation. The...

In this paper we considered the Mars–Jupiter system to study the behaviour of Near Earth Asteroids (NEAs) as most of the NEAs originate in the main asteroid belt located between Mars and Jupiter. The materials obtained from NEAs are very useful for space industrialisation. The variations in orbital parameters, such as eccentricity, inclination, lon...

The production, productivity and safety of underground coal mines are greatly affected by the environmental conditions of the mines. Hence, continuous monitoring of the complex and hazardous mine environment is essential for ensuring safe coal production. Nowadays, wireless sensor network (WSN) technique is widely used for monitoring of workplace e...

Mine fire is one of the major hazards in underground coal mines. Continuous monitoring of underground coal mines for early detection of fires is very much important from the mines safety point of view. In recent years, wireless sensor network (WSN) has gained enormous attention for monitoring of underground coal mines. In this technique, the sensor...

Layering of methane in underground coal mines owing to poor ventilation leads to methane explosion hazard. We study the methane layering phenomenon and the effect of ventilation on dispersion of methane in underground coal mines at air velocities varying from 0.5 to 4.0 m/s. Three-dimensional simulations using CFD code ANSYS Fluent 12.0 were perfor...

Longwall mining is extensively practiced worldwide for the safe extraction of coal from underground coal mines. In this paper, we analyzed several sensor node deployment schemes and proposed a novel wireless sensor network (WSN) deployment scheme for environmental monitoring in longwall coal mines. The proposed scheme is based on the probabilistic...

Coal dusts of wide particle sizes and varied concentrations are produced in underground coal mines depending upon the method of winning and extraction process of coal. Rock dust (limestone dust) is most commonly used for inerting and suppression of coal dust explosions in underground coal mines all over the world. This study examines the requiremen...

This paper presents an extensive literature review on the various sources of radon such as ore body, backfill mill tailings, broken ore and mine water in underground uranium mines. This review also comprehensively investigates the influence of intrinsic factors such as ore grade, 226Ra content, water content, porosity and surface area of the materi...

Methane layering is a critical issue for underground coal mines. It can lead to methane explosion and trigger massive explosion of coal dust. This paper presents the computational fluid dynamics (CFD) simulation study on dispersion of methane layer in tailgate of a retreating longwall mine panel considering the methane emission rate from an undergr...

Radon and its short-lived decay products are the most important contributors of inhalation exposure to ionizing radiation in uranium mines. This paper describes the assessment of inhalation exposure potential of backfill mill tailings in Jaduguda uranium mine. The inhalation exposure of the miners to radon daughters in nine stopes was estimated bas...

Monitoring of radiological parameters in underground uranium mines is essential to maintain the radiation levels within safe limits. In this study, the radiological parameters such as external gamma emitted from ore body, long-lived alpha activity associated with ore dust and radon concentration in an operating underground uranium mine located at J...

Various parameters in relation to hydraulic stowing of pond ash such as rate of water drainage from the pond ash, water absorption by the pond ash, percentage of stowing and percentage of void were evaluated using a mine goaf model stowed with pond ash slurries of five concentrations varying from 45 to 65 % at 5 % increment to identify the suitable...

Emanation of radon from rock surfaces in underground uranium mines is a continuous process and its magnitude depends on several factors such as radium content, porosity, moisture content and mineralogical characteristics of the ore. The radon gas entering into mine atmosphere starts decaying into its daughter products, which attach themselves to th...

The present study investigates the influence of slaked lime addition on the one-dimensional consolidation properties of sedimented stowed pond ash (Class F category). The effects of step incremental consolidation pressure, lime addition, and curing time on the one-dimensional consolidation characteristics such as rate of settlement, consolidation c...

This paper presents the assessment of inhalation exposure potential of broken uranium ore piles in different stopes of Jaduguda uranium mines of India. 222Rn emanation coefficient of broken uranium ore was measured in laboratory by collecting air sample from airtight glass jar containing ore sample. An attempt was also made to correlate the emanati...

Purpose: This study aims to identify the potential sources of radon exhalation and its measurement in underground uranium mines to control the radiation levels within safe limits and protect miners from radiation hazards. Methods: An extensive literature review on radon exhalation in underground uranium mines from various sources such as uranium or...

In this study, the physicochemical and self-heating characteristics of pond ashes from Talcher Thermal Power Station (TTPS), located in the Angul district of the Indian state of Odisha are studied. The study revealed that the TTPS pond ashes belong to Class F fly ash category consisting mainly of SiO2, Al2O3, and Fe2O3, with a small amount of CaO....

This study presents the measurement of radon emanation from uranium ore body and the effects of ventilation parameters on 222Rn concentration in underground uranium mine air at Jaduguda, India. The study revealed that 222Rn emanation rate from the ore body varied in the range of 0.22 – 51.84 × 10-3 Bq m-2 s-1 with average value of 18.11 ± 15.66 × 1...

Purpose: This study focuses on one of the key design aspects of mine ventilation fans, i.e. the selection of an appropriate aerofoil blade profile for the fan blades in order to enhance the energy efficiency of axial flow mine ventilation fans, using CFD simulations. Methods: Computational simulations were performed on six selected typical aerofoil...

In uranium mines, the radiological health hazard is mainly caused due to the inhalation of radon and radon progeny present in the mine atmosphere. This paper describes the different techniques used for the assessment and control of radon and its progeny concentrations in underground uranium mine at Jaduguda, India. The study revealed that the avera...

This paper discusses the different radiological hazards associated with uranium mining and the techniques used for the measurement of radiation levels in underground uranium mines. The study revealed that the average values of equilibrium equivalent radon (EER) concentration, radon daughter concentration and gamma levels in Indian uranium mines are...

Improvement of productivity has become an important goal for today's coal industry in the race to increase price competitiveness. The challenge now lying ahead for the coal industry is to identify areas of waste, meet the market price and maintain a healthy profit. The only way to achieve this is to reduce production costs by improving productivity...

This paper presents a comparative study of (222)Rn emanation from the ore and backfill tailings in an underground uranium mine located at Jaduguda, India. The effects of surface area, porosity, (226)Ra and moisture contents on (222)Rn emanation rate were examined. The study revealed that the bulk porosity of backfill tailings is more than two order...