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In this paper, detailed studies were carried out to determine the influence of rock properties on the penetration rate during pneumatic drilling. Further investigation was also carried out on the effect of thrust, air pressure, and compressive strength on penetration rate. Rock properties, like compressive strength and abrasivity of various samples collected from the field were determined in the laboratory. Drilling experiments were carried out on ten different rock samples for varying thrust, air pressure values and bit diameter. It was observed that very low thrust results in low penetration rate. Even very high thrust does not produce high penetration rate at higher operating air pressures. With increase in thrust beyond the optimum level the penetration rate starts decreasing and causes the drill bit to 'stall'. Results of the study show that penetration rate increases with increase in the thrust level. After reaching the maximum, they start decreasing despite the increase of thrust. The main purpose of the study is to develop a general prediction model and to investigate the relationships between penetration rate during drilling and physical properties such as uniaxial compressive strength and abrasivity of sedimentary rocks. The results were evaluated using the multiple regression analysis taking into account the interaction effects of predictor variables.

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Iron ore is primarily found as the oxides of iron, notably hematite and magnetite and as hydroxides like goethite and limonite. Small amounts are found as the carbonates in siderite, as sulphides in pyrites and as silicates in chamosite and greenalite. Indian economy is growing steel demand and supply will grow in the same way. As good quality iron ore deposits are depleting very fast beneficiation technologies have to be adopted to meet iron ore demand. . Agglomeration technologies such as Pelletization / Sintering have to be added to Steel Plant so that concentrates can be used as feed material. This paper will give an insight about the potential of pelletization technology of iron ore. Also focus on the present status of iron ore reserves in India, inventory of iron ore pelletization plant, primary data collection by conducting field monitoring for air, water and solid waste Compilation of primary data and assessment of compliance to stipulated norms, Preparation of best practices in Pelletization process for sound environmental management in eastern region of India.