To solve the problems about the technology and economic rationality of the surrounding rock control in the air-return gate of 1232(3) face in Xieqiao coal mine

it is concluded that bolt diameter and row spacing are the main sensitive factors that affect the surrounding rock control results of the air-return gate by using orthogonal experiment method to analyze the experiment data of different factors in different levels with the roadway’s sides and roof-to-floor convergence as indexes. Meanwhile

two locally optimization schemes are obtained by analyzing the key factors that affect the surrounding rock control results after taking the techno-economic indicators into consideration. The final optimization scheme is reached by comprehensive analysis and decision-making of the two schemes according to the method of grey correlation analysis. The actual application shows that the deformation of surrounding rock of roadway is controlled effectively and the techno-economic benefit is remarkable after the optimization of the support parameters.