Modified ground support with alternative fill material for ground control at munsar underground manganese mine of MOIL Limited, India

• Autorzy: Manekar Ganesh , Shome Dipankar , Chaudhari Mukund

Identyfikatory

DOI

10.2478/ntpe-2019-0007

• Języki publikacji: EN

Abstrakty

EN

MOIL Limited is operating 7 underground and 3 opencast mines in central India and producing annually more than 1.3 million tonnes of various grades of manganese ore. The underground mines are operating at shallow - 90 m at Munsar mine to moderate - 353 m at Balaghat mine below the surface with horizontal cut and fill (HCF) or its variant method of stoping with post filling by hydraulic sand stowing. The Munsar mine is being worked underground since 1903. The opencast mining is presently stopped. The ore body below the opencast quarry is geological continuity of the area excavated in past by opencast method of mining. The underground mining is done through the adit in three levels i.e. 270’L, 220’L, 170’L and by incline in western part of the property at 70’L. The horizontal drift development has been developed in the manganese ore body with sill drive of 5 m above the sill pillar in lower level at 70’L and barrier pillar of 5 m thickness is left for protection of upper level at 170’L. Valuable mineral has been locked in sill pillar and therefore rock mechanics investigations have been carried out. On the basis of study now the drift development has been carried out in footwall rock at 70’L, (-) 30’L and below levels and it has improved the minable manganese ore by about 20%. In this modified HCF stope design, an alternative fill material in place of sand, which has been developed in house by use of overburden (OB) material after treatment, has been used for hydraulic stowing. The experimental trials find out that the alternative fill material of OB is more compact and forms a non-expansion floor for the men and machines in the stope. This will certainly help in the introduction of mobile underground mining equipment for drilling in the stopes and mechanical mucking, transportation and loading of the ROM. The paper presents rock mechanics investigations and future use of alternative fill material of overburden material after heat treatment for better safety and productivity at Munsar Mine of MOIL.

Słowa kluczowe

EN

cable bolting; heat treatment; overburden; RMR; stowing

PL

kotwienie kabli; obróbka cieplna; nadkład; RMR; podsadzka

• Wydawca: STE GROUP ; De Gruyter
• Czasopismo: New Trends in Production Engineering
• Rocznik: 2019
• Tom: Vol. 2, Iss. 1
• Strony: 69--77
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Manekar Ganesh

• MOIL Limited, (A Government of India Enterprise), MOIL Bhawan, Nagpur, India

autor

Shome Dipankar

• MOIL Limited, (A Government of India Enterprise), MOIL Bhawan, Nagpur, India

autor

Chaudhari Mukund

• MOIL Limited, (A Government of India Enterprise), MOIL Bhawan, Nagpur, India

Bibliografia

• 1. Barton N. & E. Grimstd (1976), the Q system following 20 years of application NMT support selection, Indo-Norwegian workshop on rock mechanics, KGF, India. pp. 1-9.
• 2. Bieniawski Z. T. (1973), Engineering Classification of Jointed Rock Masses, Trans. South Africa Institute, Civil Eng., 15.
• 3. CMRI Report (2001), 2nd Interim Report on geotechnical properties and classification parameters of Munsar, Beldongri, Chikla, and Gumgaon mines, 4 p.
• 4. Manekar G G, Shome D, and Chaudhari M P, (2018), Conservation of valuable mineral by rock mechanics investigations in Munsar underground manganese mine of MOIL Limited, India, ARMA 2018.
• 5. Raju, G. D., Jain, P, Venkateshwarlu V, and Rajan Babu A, (2016), National Institute of Rock Mechanics (NIRM), India - Report of stoping parameters for Munsar Mine, MOIL Limited., Nagpur.
• 6. Ramakrishna, M. and Vaidhyanadhan, R., (2010), Geology of India, Vol. 1, Geol. Soc. India, Bangalore, 556 p.
• 7. Christine Saiang, Influence of Heat on the physical and mechanical properties