A blasting technique with small burden and large hole-bottom spacing had been used experimentally in 1 1 stope of 91# orebody in Tongkeng Mine. It was proved by experi-ments that large-sized fragment rate of caved ore was significantly reduced,ore drawing capacity improved, mining cost lowered and good technic economic effects obtained with this blasting technique. Thus the experiment provides experience for the mining of 91# orebody in the mine