Article

Ahmad, I. and Sahay, N. and Varma, N. K. and Sinha, A. (2009) Application of High expansion nitrogen foam to control mine fire – a case study. Journal of Mines, Metals & Fuels, 57 (11). pp. 390-398. ISSN 0022-2755

Sahay, N. and Ahmad, I. and Varma, N. K. and Sinha, A. (2009) Assessment of status and extent of fire in abandoned coalmines – a case study. Journal of Mines, Metals & Fuels, 57 (11). pp. 406-412. ISSN 0022-2755

Varma, N. K. and Sahay, N. and Ahmad, I. and Sinha, A. (2009) Significance of ventilation system design on fire with special reference to extensive and fire affected mine. Journal of Mines, Metals & Fuels, 57 (11). pp. 413-417. ISSN 0022-2755

Sahay, N. and Sinha, A. and Ahmad, I. and Varma, N. K. (2008) Control of open fire in underground at Noonidih-Jitpur colliery, SAIL [steel plant]. Journal of Mines, Metals & Fuels, 56 (12). pp. 241-248. ISSN 0022-2755

Varma, N. K. (2008) In-situ determination of thermal properties of coal measure rocks in underground coal mines. Indian Mining & Engineering Journal , 47 (5). pp. 14-22. ISSN 0019-5944

Varma, N. K. (2008) Thermal conductivity of coal-measure rocks of raniganj coalfield. Journal of Mines, Metals & Fuels, 56 (1&2). pp. 16-21. ISSN 0022-2755

Sahay, N. and Varma, N. K. and Ahmad, I. (2006) Critical temperature - an approach to define proneness of coal towards spontaneous heating. Journal of Mines, Metals & Fuels, 54 (1&2). pp. 29-35. ISSN 0022-2755

Sahay, N. and Ahmad, I. and Varma, N. K. (2005) Assessment of sealed off area for reopening - an approach. Indian Mining & Engineering Journal , 44 (10). pp. 29-32. ISSN 0019-5944

Singh, R. P. and Ray , S.K. and Singh, Arvind Kumar and Varma, N. K. and Sahay, N. (2005) Studies on Spontaneous Heating Behaviour of Coal. Journal of Mines, Metals & Fuels. pp. 105-110. ISSN 0022-2755

Ray , S.K. and Singh, R. P. and Sahay, N. and Varma, N. K. (2004) Assessing the Status of sealed fire in underground coal mines. Journal of Scientific & Industrial Research , 63 (7). pp. 579-591. ISSN 0022-4456

Sahay, N. and Varma, N. K. (2004) Determination of air permeability of coal pillars in underground coalmines. Journal of Mines, Metals & Fuels, 52 (5&6). pp. 90-94. ISSN 0022-2755

Singh, Arvind Kumar and Ahmad, I. and Sahay, N. and Varma, N. K. (2004) Air leakage through underground ventilation stoppings and in situ assessment of air leakage characteristics of remote filled cement concrete plug by tracer gas technique. Journal of the South African Institute of Mining and Metallurgy , 104 (2). pp. 101-106. ISSN 0038-223X

Sahay, N. and Ray , S.K. and Ahmad, I. and Varma, N. K. and Singh, R. P. (2003) Improvement in Ventilation in a fire affected Mine. Journal of the South African Institute of Mining and Metallurgy , 103. pp. 465-476. ISSN 0038-223X

Sahay, N. and Varma, N. K. and Ahmad, I. and Singh, Arvind Kumar and Ray , S.K. and Singh, R. P. (2002) Chamber method of ventilation - a proven technology for reducing leakage of air into the goaf. Journal of Mines, Metals & Fuels, 50 (9). pp. 345-350. ISSN 0022-2755

Ahmad, I. and Sahay, N. and Varma, N. K. and Singh, V.K. (2002) Spontaneous heating problem in BG panels - a major constraint in coal extraction in SCCL mines. Journal of Mines, Metals & Fuels, 50 (9). pp. 351-355. ISSN 0022-2755

Varma, N. K. and Singh, A.K. and Gupta, M.L. (2001) In-situ measurement of thermal conductivity in underground coal mines. Journal of Mines, Metals & Fuels, 49 (1&2). pp. 19-25. ISSN 0022-2755

Pandey, J.K. and Varma, N. K. and Singh, Arvind Kumar and Gupta, M.L. (1999) Development of SF6 Tracer gas technique for Measuring air flow rate. Journal of Mines, Metals & Fuels, 47 (11). pp. 289-291. ISSN 0022-2755

Varma, N. K. and Gupta, M.L. (1999) In-situ measurement of thermal diffusivity in underground coal mines. Journal of Mines, Metals & Fuels, 47 (7&8). pp. 172-176. ISSN 0022-2755

Varma, N. K. and Singh, Arvind Kumar and Pandey, J.K. and Gupta, M.L. (1997) Air Leakage Through Underground Ventilation Structures with Special Reference to Isolation Stoppings. Journal of Mines, Metals & Fuels, 45 (4). pp. 103-106. ISSN 0022-2755

Pandey, J.K. and Singh, Arvind Kumar and Jayanthu, S. and Varma, N. K. and Gupta, M.L. (1996) Techno-Economic Feasibility of Controlled Recirculation System of Ventilation. Indian Mining & Engineering Journal , 36 (12). pp. 31-37. ISSN 0019-5944

Gupta, M.L. and Panigrahi, D.C. and Varma, N. K. and Pandey, J.K. (1993) Determination of Virgin Rock Temperature in Raniganj Coalfield. Journal of Mining Research , 1 (4). pp. 11-17. ISSN 0971-1899

Gupta, M.L. and Varma, N. K. and Sahay, N. (1987) Study of simple auxiliary Ventilation installation. Journal of Mines, Metals & Fuels, 35 (8). pp. 347-353. ISSN 0022-2755

Gupta, M.L. and Sahay, N. and Varma, N. K. (1985) Concepts in design of auxiliary ventilation system. Journal of Mines, Metals & Fuels, 33 (8). pp. 363-368. ISSN 0022-2755