Coal roadway stability of through-syncline structure area of Yuwu Coal Mine
In order to study the influence of deep multi-structural strata on the stability of roadway surrounding rock,the S5203 belt cross-heading of Yuwu Coal Mine is taken as the research background.After analyzing the characteristics of the surrounding rock of the mine and the law of failure,through the calculation of the plastic zone,the method of controlling the deformation of the roadway is obtained:the plastic zone is concluded by the short anchor rod,and the plastic zone and the original rock are fixed by the long anchor cable,and the support concept of"long and short combined grading support"is proposed.For the syncline stratum,FLAC3D simulation and engineering measurement are used to analyze the stress and strain of the roadway in the syncline axis and wing after support.The results show that the optimum roadway layout form of the S5203 belt cross-heading is the layout on the roof of the syncline wing.After choosing the scheme of the"long and short combined grading support",the maximum roof subsidence value of the roadway is 49.5 mm,and the maximum offset value of the two sides is 83 mm.The study can provide reference for similar projects.
deep buried coal roadwaysynclinal structureplastic analysisnumerical simulationengineering measurement
万方数据
维普
