Research on Reasonable Width of Section Coal Pillar and Roadway Support in Fully Mechanized Caving Face
In order to solve the difficult problem of support of the roadway along goaf during the preparation stage of the fully mechanized caving working face in Changcun Coal Mine,research and application of the optimal coal pillar size and support scheme for the roadway along goaf are carried out by comprehensively using empirical formula calculation,numerical simulation,on-site investigation and measurement methods,etc.The research shows that according to the calculation of elastic-plastic limit equilibrium theory,the width of the coal pillar in the roadway along goaf should not be less than 29.14 m.Numerical simulations show that when the width of the coal pillar is greater than 30 m,there is a stable elastic core area in the coal pillar during the roadway excavation period.The optimal width of the coal pillar is determined to be 30 m;based on the original support of the 2106 transportation crossheading,four optimization schemes are designed,and the optimal scheme is selected through numerical simulation.The support effect of the roadway along goaf is good,and the determined coal pillar width and support scheme are relatively scientific and reasonable.
国家科技期刊平台
NSTL
万方数据
