Mine Ventilation Gb Mishra.pdf
Mine Ventilation Gb Mishra.pdf
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Mine Ventilation Gb Mishra.pdf: A Comprehensive Guide to Mine Environment and Ventilation
Mine ventilation is the process of supplying fresh air and removing contaminated air from underground mines. It is essential for the health and safety of miners, as well as for the efficient extraction of minerals. Mine ventilation also affects the environment, as it can reduce greenhouse gas emissions and prevent spontaneous combustion of coal.
One of the most authoritative books on mine ventilation is Mine Environment and Ventilation by G. B. Misra[^1^]. This book, first published in 1986, is designed for both students of mining engineering and practicing engineers. It covers the principles and practices of mine ventilation, including air flow, heat and humidity, dust and gas control, fire and explosion hazards, ventilation planning and design, instrumentation and monitoring, and environmental impact assessment.
In this article, we will provide a summary of the main topics covered in Mine Environment and Ventilation, as well as some of the benefits of reading this book. We will also provide a link to download a PDF version of this book for free[^2^]. Whether you are a student, a researcher, or a professional in the mining industry, you will find this book to be a valuable resource for learning and improving your skills in mine ventilation.
Air Flow
Air flow is the movement of air in a mine. It is influenced by various factors, such as pressure difference, resistance, leakage, density, temperature, and fan characteristics. Air flow can be measured by various methods, such as anemometers, pitot tubes, orifice plates, venturi tubes, and tracer gas techniques. Air flow can be analyzed by using equations such as Bernoulli's equation, Darcy-Weisbach equation, Atkinson's equation, or Hardy-Cross method.
Air flow is important for maintaining adequate ventilation in a mine. It can provide oxygen for respiration, dilute harmful gases and dusts, cool down the mine temperature, and prevent fire and explosion. Air flow can also affect the productivity and efficiency of mining operations, as it can influence the drilling, blasting, loading, hauling, and hoisting processes.
Heat and Humidity
Heat and humidity are the thermal conditions of a mine. They are affected by various sources, such as geothermal heat, rock strata temperature, solar radiation, machinery heat, human heat, moisture content of air and rock, water inflow, evaporation, condensation, and ventilation. Heat and humidity can be measured by using instruments such as thermometers, hygrometers, psychrometers, wet-bulb thermometers, or sling psychrometers. Heat and humidity can be calculated by using formulas such as wet-bulb temperature equation, dew point equation, relative humidity equation, or psychrometric chart.
Heat and humidity are important for maintaining comfortable working conditions in a mine. They can affect the health and performance of miners, as well as the durability and efficiency of equipment. Heat and humidity can also affect the safety of a mine, as they can increase the risk of heat stress, heat stroke, dehydration, or heat exhaustion. Heat and humidity can also affect the stability of rock strata, as they can cause thermal expansion, contraction, or cracking.
Dust and Gas Control
Dust and gas control is the prevention or reduction of airborne particles and gaseous substances in a mine. Dust and gas can be generated by various sources, such as drilling, blasting, crushing, grinding, conveying, or combustion. Dust and gas can be controlled by various methods, such as water spraying, dust suppression chemicals, dust collectors, filters, scrubbers, or catalytic converters. Dust and gas can be monitored by using devices such as dust samplers, gravimetric analyzers, optical counters, or gas detectors.
Dust and gas control is important for maintaining healthy air quality in a mine. Dust and gas can affect the health and safety of miners, as well as the environment. Dust can cause respiratory diseases, such as silicosis, pneumoconiosis
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