Numerical simulation of stress distribution in longwall panels during the first caving interval

Reliable prediction of induced stress distribution in longwall panels enhances safety in longwall mining. This paper presents the results of numerical simulation intended to examine stress distribution in terms of peak abutment pressures during the first caving of longwall mining. Longwall mining was simulated by incorporating Universal Distinct Element Code (UDEC). Several conceptual models were developed and subsequently analyzed to investigate the effects of five critical parameters on peak abutment pressures. Critical parameters that were studied as a part of this investigation included roof strata uniaxial compressive strength, immediate roof height, spacing of bedding planes and Vertical and horizontal in situ stresses. The results of numerical simulation increased the current understanding of rear and front abutment pressures in longwall mining under various geo-mining conditions.