Web1 jun. 2009 · In the simulation process, the evolution of the strength, damage ratio, water pressure, stress, strain, and other parameters in coal pillars under the effect of mining … WebThe coal 8210 big mining height of the Datong mine Jin hua gong face in the process of mining airport coal pillar fried state a, floor deformation intense, serious kick drum, eventually leading to rock failure .In the severe cases, easily induced by shock pressure and other disasters ,these have serious impact on the efficient production of face security in …
Sustainability Free Full-Text Stability Analysis of Multi-Layer ...
Web20 mrt. 2024 · The backfilling of the remaining goaf can maintain the stability of the coal pillar well, but the coal pillar in the unfilled zone may still be unstable. In this paper, the … WebJaiswal, Ashok, Shrivastva, B.K. (2009): Numerical simulation of coal pillar strength, International Journal of Rock Mechanics & Mining Sciences; Volume 46, 779-788. has … civil engineering in the philippines history
Minerals Special Issue : Solid-Filling Technology in Coal Mining
Web4 apr. 2024 · The numerical simulation results show that the coal pillar at 10 m in front of the coal face is in plastic state, and the plastic areas in solid coal and roof are 3.5 and 3.2 m, respectively. The peak zone of deviatoric stress is mainly located at 4 m deep in coal pillar and 3.5 m deep in solid coal, and 22 m in front of the coal face is in high deviatoric … WebThe mining of the 20 metres wide vein was conducted in 17 stages and simulated by deleting elements within the 5 metres high mining slice. The mechanical parameters used in the model are based on the measurements in the laboratory and are listed in Table 1. According to insitu stress measurement (Sulistianto et al, 2006), stress Web19 jun. 1989 · This simulation was based upon material properties developed from laboratory tests of coal cubes and examined against coal pillar strength data … civil engineering in trinidad and tobago