Abstract: To deal with the caking ore in Tongkeng mine,the blasting caving technique was used to induce caving and break caking ore.Taking caking ore as the object,and with LS-DYNA numerical software,tests were designed to simulate the breaking process of caking ore in different dropping heights,angles and strength of weak structure.Broken laws of caking ore were obtained,and the corresponding induced caving parameters were raised.Results showed that ①better caving result was got in condition of the caving height 5 m and the caving angle 30°,the broken rate is up to 100%.②height between the caking ore and contact surface should be more than 5 m,and the angle between the ultra-deep blasting surface and horizontal plane need to be 5°＜θ＜30°.Research results provide theoretical basis for the processes and parameters of broken caking ore induced by caving.

Key words: Sulphide caking ore, Induction caving, Weak structure, LSDYNA simulation