Grey Relation Analysis of Influenced Factors for Deep Surrounding Rock Stability

According to the complicated factors that influence the stability of surrounding rock in deep roadway, which exhibits a typical grey system characteristics, and based on the three kinds of hazard theory, the method of grey relation analysis was used to sort on factors that influence the stability of surrounding rock in deep roadway through grey relation analysis on its geological characteristics, environmental factors and human engineering，etc, The main factors were determined, which can control deep surrounding rock from the aspect of hazard more pertinently. Result shows that grey relation analysis has high accuracy, which can make up for the traditional mathematical methods that less samples resulted in inaccurate results, and is well for small sample problems; the obtained relationship between primary and secondary influence factor by the method is coincide with the actual situation.