Stability Analysis of set-up Room of a deep Longwall Panel of Lndia using ۳D Numerical Modelling Technique

The installation gallery/set-up room of a longwall panel is driven for installation of the longwall face machineries to start the extraction of coal from the longwall panel. The width of the installation gallery is ۸ to ۹ m. This gallery needs to be stabilized till the face machineries to be deployed from the driving of the room as it required to stand more than ۸ to ۱۰ months and develop the high stress concentration, roof-to-floor convergence and yield zone in the roof and sides. Hence, in this study, a deep longwall mine of India is considered to analyze the behavior of set-up room. For this, a total of twelve ۳D numerical models are developed and analyzed considering Mohr’s-Coulomb failure criterion. Three panels located at ۴۱۷, ۴۶۲, ۵۲۸ m having three different widths (۸, ۱۰ and ۱۲ m) of set-up rooms are examined. The width of the set-up room is taken based on the length of the shield support. The results in terms of vertical stress distribution, vertical displacement, roof-to-floor convergence, plastic strain and yield zone distribution are presented.

کلیدواژه ها:

Longwall ، Set-up room ، Stress concentration ، Roof to floor convergence ، Yield zone