The pillar sublevel caving mining is adopted to No. 213 large and thick ore-body of Baizhangzi gold mine,and ore loss and dilution are bigger under the influence of the condition of ore body. To improve recovery index,the non-pillar sub-level caving method with low loss and dilution rate is used to sublevel 0 to +60 m of No. 213 ore-body. The stope structure is improved and optimized through the granular flow parameters experiment and layout form of the mining drift. The reasonable structural parameters are separately set up to different shape of ore-body. Based on the principle of lozenge arrangement,the mining drift is adjusted. The blasting parameters of being suitable for ore body condition and the processing way of stone are given. Each level is run through the ramp,and stoped by the method of upper and lower section at the same time. By this meth-od,the ore loss and dilution rate can be controlled at nearly 12%,and the problem of the big loss and dilution can be effective-ly solved,which can provide a reference for similar mines.%柏杖子金矿213号厚大矿体采用有底柱崩落法开采，受矿体条件影响，损失和贫化较大。为改善回采指标，将213号矿体0~+60 m水平改用低贫损模式的无底柱分段崩落法开采。通过散体流动参数试验与进路布置形式改进优化了采场结构。即针对不同的矿体形态，分别设置了不同的结构参数；以菱形布置方式为原则，调整了进路位置；给出了夹石处理方式及适合矿体条件的爆破参数。方案采用斜坡道贯穿各水平，并采用上、下分段同时回采的方式，矿石损失率、贫化率均可控制在12%左右，有效解决了损失贫化大问题，可为类似条件矿山提供参考借鉴。
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