Multiple seam mining: A critical review

Abstract

Multiple seam mining implies simultaneous working of more than one seam. The major problem encountered in this type of mining are related to ground control. These ground control problems are mainly due to the pillar load transfer. The pillar load transfer mainly depends on the physical characteristics of the parting material between the seams and also its thickness. There are various parameters affecting the multiple seam working. Broadly these parameters are classified into two i.e. fixed parameters and mine design parameters.' Fixed parameters are seam thickness, depth of seam, parting thickness, physical characteristics of the parting, geology of the seam, etc. Mine design parameters are sequence of working of the seam, method of working, pillar size, type of supports used, etc. Most of the coal reserve in India is locked up in multi-seams. This paper discusses the various research work carried out in India as well as abroad, related to ground control problems associated with multi-seam mining.