Visualization application of support classification based on improved LEC and optimization of support simulation
In order to solve the problems of common failure and deformation of roadway support,frequent repair and low economic benefit of mining in the eastern lean mine of Jinchuan X mining area,the field investigation of roadway convergence deformation and surrounding rock mass quality was carried out systematically,and the difficulty of support in mining area was classified according to the classification index of surrounding rock stability.Based on the analysis of the deformation characteristics of the serious deformation and failure area of the roadway,the optimization scheme of the roadway support is proposed.The numerical model is constructed by FLAC3 D,and the comparative analysis of the support effect of different support schemes is carried out.The results show that under the high stress environment dominated by external horizontal tectonic stress,the deformation of roadway can be effectively controlled by using'anchor net spray'support,and the stability of surrounding rock can be effectively improved by increasing the pre-tightening force of steel bar and bolt.Compared with the ordinary screw steel bolt support,the use of plum-shaped arrangement of bolts can greatly reduce the amount of use and support workload,and effectively improve the economic benefits of lean ore mining in the east.
万方数据
维普
