Study on Structural Reliability of Bolt-shotcrete Support of Roadway Based on JC Method

Based on the action mechanism of bolt-shotcrete support structure of roadway, and its state equation is achieved. Combined with the basic principle of checking point method (JC method), from the point of view of the mechanics, the reliability calculation formula and process on JC method about bolt-shotcrete support structure in roadway is established. According to the reliability calculation formula and process, the reliability of an engineering example is calculated. The results show that the concrete lining thickness and bolt interval are important influencing factors to the reliability indexes in this roadway. And the best values of concrete lining thickness and bolt interval are 8 cm and 0.9 m.