Role of Geological Discontinuities during Application of Continuous Miner Technology in Underground Coal Mines
Authors
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Chief Scientist, CSIR–Central Institute of Mining and Fuel Research, Dhanbad 826 015 ,IN
A. Kushwaha -
Senior Technical Officers, CSIR–Central Institute of Mining and Fuel Research, Dhanbad 826 015 ,INR. Bhattacharjee
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Senior Technical Officers, CSIR–Central Institute of Mining and Fuel Research, Dhanbad 826 015 ,INS. Tewari
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Senior Principal Scientist, CSIR–Central Institute of Mining and Fuel Research, Dhanbad 826 015 ,INP. K. Mandal
Keywords:
No Keywords.Abstract
A major portion of ground control problems encountered in underground coal mines can be attributed to geological discontinuities in the coal seam and the strata surrounding the seam. The role of geological discontinuities becomes more vital during application of mass production technology like continuous miner in maintaining safety, production and efficiency. Careful and detailed geological mapping to pick up the trend of joints, faults/slips, cleat etc., and documentation of roof instability problems encountered during development is essential in anticipating and controlling instability in the mine roof before planning of pillar extraction. Mapping helps in planning the orientation of extraction line to induce caving during depillaring and improving stability at the face significantly. Loss or damage of machines including decrease in production and productivity due to trapping of continuous miner may also be avoided. This technique estimates the orientation of major principal stress and avoids heavy expenditure on conducting in-situ stress measurements. It enhances in understanding the influence of drivage direction on roadway conditions and re-orientation of the roadways to attain stability in the roof. In the present paper, authors have dealt two cases, VK-7 Incline and GDK-11 Incline mines of Singareni Collieries Company Limited (SCCL), where geological discontinuities played a crucial role during application of continuous miner technology in underground coal mines.
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References
CMRI Report (1987): Geomechanical Classification of Coal Measure Roof Rocks vis-à-vis Roof Supports, Submitted to the Ministry of Coal, 125p.
Valois, R. Shea-Albin (1993): IC 9370, Information Circular; Geological Features that Contribute to Ground Control Problems in Underground Coal Mines; United States Department of the Interior, Bureau of Mines, 38p.
Kushwaha, A., Sharma, D. N., Tewari, S., Bhattacharjee, R. and Sinha, A. (2012): Evaluation of roadway in-stability in the presence of stress anisotropy in underground coal mines, Proceedings 46th US Rock Mechanics and Geomechanics Symposium. Chicago, IL. ARMA 12-242.
CIMFR Report (2012): Design of Extraction Pattern for Developed Pillars of Sub-panels CMP-6A and CMP-6B of King Seam lying below Caved Goaf of the Top Seam, using CM Technology at VK7 Incline, SCCL, 45p.
Manohar Rao, A., Rama Mohan Rao, V., Venkateswarlu, K. and Srinivasa, Rao G. (2010): Challenges encountered while working with continuous miner at GDK-11 Incline / Ramagundam – A case study; National Seminar on Underground Coal Mining, Organised by DGMS and SCCL, Hyderabad, 28th August 2010, pp. 37- 50.
Manohar Rao, A. and Sharma, D. N. (2014): “Stress orientation in the Godavari Gondwana Graben, India;” Journal of Rock Mechanics & Tunnelling Technology (JRMTT), 20 (2), pp. 109-119.
Kushwaha, A., Singh, S. K., Murali Mohan, G. and Sheorey, P. R. (2003): “Effect of in-situ horizontal stresses on roadway stability,” Journal of Mines, Metals & Fuels, 51(3), pp. 134-142.
