Method and system for determining supporting thickness and novel mining composite supporting method

The invention belongs to the technical field of mine roadway supporting construction, and discloses a method and system for determining the supporting thickness and a novel mining composite supporting method. The method for determining the support thickness comprises the steps of establishing a hierarchical structure model through an analytic hierarchy process to analyze and determine the preliminary support thickness, then calculating the rationality of the support thickness in combination with a numerical model, and finally verifying the effectiveness of the support thickness through a field support monitoring result. According to the method, a metal supporting structure and a surrounding rock wall surface can be effectively sealed, surrounding rock joint fissures can be effectively filled, the saltpetering degree of follow-up supporting bodies brought out by fissure water flow is reduced, the phenomenon that the supporting bodies crack is reduced, and harm to constructors caused by small pumice stones is a