| This paper takes Longma coal mine’s 3305 fully mechanized caving face roadway along goaf roadway surrounding rock control and support as the engineering background, Through literature review, theoretical analysis, numerical simulation and industrial experiment combinative research methods, analysis the factors that affecting the stability of surrounding rock of roadway driving along goaf, especially the influence of geological factors. Based on the conclusion, through the analysis of simulate the tunnel anchor cable combined support parameters, to determine the optimal supporting scheme and the experiment was conducted in the field.The conclusions are as following, Within a certain range, with the increase of the dip angle of coal seam, The roadway surrounding rock deformation of along goaf is increasing, The stability of the surrounding rock is getting worse, and The deformation of the surrounding rock is non symmetry breaking mechanism. The relative position of gob and tunnel also has some influence on the stability of surrounding rock, When Gob level elevation below the roadway level, The deformation of surrounding rock is more serious than the deformation of gob level elevation above the roadway level; The width of coal pillar under certain condition, The thickness of coal seam increasing due to the size of gob area increased, and due to the side abutment pressure peak shift to the gob side entry and the deep surrounding rock, So that the deformation of surrounding rock increases first and then decreases; With the increase of buried depth, Multiple heave and solid coal side roadway deformation increase is higher than the multiple roof subsidence and side of the coal pillar roadway deformation increase, When the depth of coal seam increased to more than 480 m, The rock deformation of along the goaf surrounding increased sharply, The stability of surrounding rock of roadway destroyed badly, and take roof convergence and roadway deformation of coal pillar as the principal thing. |
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