Abstract: In order to solve the problem that the rock stratum of the east return air roadway in Sihe mine is hard，which affects the tunneling efficiency and safety，a new underground roadway high-speed tunneling scheme based on drilling and blasting method is proposed. First of all，starting from improving the automation of underground operations，the efficiency of tunneling and drilling can be improved through drilling and loading machines，and the number of working face personnel can be reduced. Then，through the scheme of simulation analysis，the optimal hole spacing of underground blasting is scientifically and reasonably determined. Through the analysis of underground geological conditions，the blasting cutting scheme and charging scheme are determined. Finally，through the anchor cable reinforcement support and multi process cross parallel operation，the optimization of underground roadway support and tunneling oper⁃ ation is realized. The practice shows that the new underground high-speed tunneling scheme can improve the roadway support efficiency by 27.4% and the roadway tunneling efficiency by 66.7% with significant safety and economic benefits.

Key words: roadway excavation, drilling and installation machine, deep hole blasting, simulation anal? ysis, reinforcement support