Effect of width of gallery of highwall mining on stability of highwall: a numerical modelling approach

摘要: Owing to continuous increased demand for coal, along with existing mining methods, some novel methods are being looked for. Highwall is such a method where considerable quantity of coal blocked in the highwall can be extracted great extent. The major challenge roof control stability highwall. This was introduced one opencast mines first time India. A systematic study taken up using numerical modelling approach assess influence width gallery on based field investigations. as 3.5, 4.25 and 5.0 m. It found that stress strain more case m wide compared 3.5 values were at end point galleries starting points galleries. factor safety decreased from