Abstract: At present, when coal mine occurs in our country, escaping persons in the safety facilities can only passively wait for rescue before the disaster is removed. However, protection time provided by refuge chamber is limited and secondary disaster may occur because of the failure protection. Combined with emergency safety technology at home and abroad and classic cases of emergency rescue, taking Wangjialing No.2 permanent refuge chamber as an example, we build a single rescue drilling in the refuge chamber through field investigation and theoretical research. Drilling size and pore forming technology is determined and numerical simulation is done on drilling stability.