Field measurement of the influence of coal face mining on adjacent main roadway deformatio

At present, theory analysis and simulation analysis of surrounding rock control and deformation of main roadway often simplify some special conditions in the field, such as fault structure, which leads to large differences between simulation results and actual results. In view of the above problem,field measurement method is used to analyze deformation law of adjacent roadway after the coal face is mined, and influence of coal face mining on adjacent roadway is studied taking coal face of a mine as engineering background. Through analysis of roadway deformation data got by 14 measurements over a period of 3 months, the conclusions are obtained: roadway deformation in the area affected by mining is the result of comprehensive influence of working face mining, mining fault activation and cross stress concentration;roadway deformation speed decreases as the horizontal distance between measuring point and coal surface increases gradually, indicating that the influence of mining on roadway decreases gradually; deformation velocity characteristics of left-right sides of the roadway at different measuring points are similar to those of the roof-floor, and the deformation of roof-floor of the roadway is obviously larger than that of the left-right sides, indicating that the roadway is mainly affected by horizontal stress; during subsequent advance process of coal face, deformation monitoring of surrounding rock of the roadway should be strengthened when advancing to vicinity of fault intersection line.