Due to the high attenuation of radio frequency (RF) signals in underground mines and the statutory power restriction of communication gadgets especially for coal mines, the wireless communication systems have restricted applications in the underground mines. The paper discusses different radio frequency communication techniques being employed for Indian underground mines. Experiments were condu...

areas surrounding mines are severely vulnerable to pollution due to mine explorations, excavations and transportations. nowadays spectrophotometers and spectral reflectance are applied for estimating the concentration of pollutants due to high costs of sampling and laboratory measurements. this research was carried out to determine spatial distribution of lead concentration in soil particle siz...

In this study a sample of bentonite obtained from Semnan mines, was modified by a surfactant to prepare an organoclay with high surface area. BET analysis showed that the modification increased its surface significantly. The prepared sorbent was used for removal of dyes and other organic pollutants from a waste water obtained from Ekbatan textile company. Adsorption was studied in ...

Abstract In the United States, an unexpected and severe increase in coal miners’ lung diseases late 1990s prompted researchers to investigate causes of disease resurgence. This study aims scrutinize effects various mining parameters, including rank, mine size, operation type, seam height, geographical location on prevalence worker's pneumoconiosis (CWP) surface underground mines. A comprehensiv...

Retrospective analysis of data obtained from long-term monitoring technogenic seismicity and rockbursts at the Apatitovy Tsirk Rasvumchorr Plateau deposits (Russia) showed that there is a significant (by 50% or more) increase in number geodynamic events during spring snowmelt periods. An upswing seismic activity within this rock massif occurs when following conditions are true: water reserve sn...

Over significant areas of the UK and western Europe, anthropogenic alteration of the subsurface by mining of coal has occurred beneath highly populated areas which are now considering a multiplicity of 'low carbon' unconventional energy resources including shale gas and oil, coal bed methane, geothermal energy and energy storage. To enable decision making on the 3D planning, licensing and extra...

Knowledge of in situ stresses is fundamental to many studies in earth sciences, and coal mine ground control is no exception. During the past 20 years, it has become clear that horizontal stress is a critical factor affecting roof stability in underground coal mines. The theory of plate tectonics and the World Stress Map (WSM) project has been extremely helpful in explaining the sources and the...

Introduction:Uranium in drinking water and food is known to cause many medical problems. Several studies have been conducted to enquire about the health of people around limestone, coal etc mining areas. But little has been known about the people around uranium mines. Hence this study was done to evaluate the enamel defects present among the children residing near uranium mines in the Gogi Vill...