Influence of anisotropic stress conditions on design of development workings in bord and pillar mining

The knowledge of in-situ stress plays a vital role in design of any underground structure in rock. In mining context, the knowledge of in-situ stress becomes necessary at many stages of mine planning, viz. while deciding about the appropriate layout, designing the ground support and establishing a proper and efficient extraction sequence etc. In today's numerical analysis based problem solving approach, the state of subsurface stress or in-situ stress forms the basic input parameter for analysis of any rock mechanic problem. This paper discusses the directional role of high horizontal stress in Tandsi mine, of Western Coal Fields (WCL). An approach based on wedge analysis and stress analysis of the layout for bord and pillar mining is discussed in this paper. This helps in understanding the design requirements for proper layout plan.