Abstract: Zhenyuan Gold Mine was designed to be mined by pillarless sublevel caving method.In order to improve the recovery of ore,reduce the mining loss rate and ore dilution rate and ensure the mine to achieve safe,efficient and low-cost recovery,the monomeric ore discharge model test,planar model ore discharge verification test and cross approach ore discharge simulation test were respectively conducted to determine stope structural parameters.According to the structural parameters determined by the monomeric model ore discharge test,the planar model ore discharge verification test was conducted to determine the indicators of ore recovery rate and ore dilution rate,and mining loss rate.In order to obtain better indicators of ore recovery,a cross approach mining simulation test is carried out,and according to the test results,under the condition that the ore dilution rate is 25 %,the ore recovery rate can reach 74.88 %-87.98 %.The final stope structural parameter is determined:sublevel height×approach spacing×caving step spacing=10 m×10 m×3.9 m.The result can provide technical support and basis for on-site industrial tests.