Validation of RMR-based support design using roof bolts by numerical modeling for underground coal mine of Monnet Ispat, Raigarh, India—a case study

摘要: In underground coal mines, a lot of major fatalities have occurred due to roof fall in the newly developed faces or galleries mines during development production coal. There are around 500 coalmines India, and continuous exploitation depends upon stability gateways form galleries, which supported such manner so that they can last up period, unless it has been finally extracted out with an operation called depillaring. A system support design bolting, resin cable bolting for aforesaid is presently being decided on basis rock mass rating (RMR). The same attempted use 3D numerical modeling technique—a tool nowadays very extensively used geotechnical engineering predict structures be built against nature, i.e., mines. this study, RMR also validated technique three locations Monnet Ispat coalmine. After found give better comparison RMR-based system, will play role reducing total cost incurred from