In this paper, stope structure optimization during sublevel caving mining is considered under the condition that the isolated draw zones (IDZs) are nonstandard ellipsoid, which is realized by dynamically adjusting the arrangement of IDZs and quantifying the degree of intersection of IDZs according to an ore profit and loss calculation model. A dynamic intersecting arrangement model based on IDZs was proposed, which can dynamically adjust the sublevel height and drift spacing according to the ore-rock bulk flow parameters, economic indicators, occurrence condition of the ore body, drilling machine, and so forth. Based on the model, the range of drift spacing, the lower volume of crestal residual ore, and the higher volume of mixing waste rock are calculated. By deducing the function of ore profit and loss, a calculation model for ore profit and loss is established to quantify the degree of intersection of IDZs and determine the best stope structure. Using the constructed dynamic intersecting arrangement model, a stope structure of −213 m to −303 m in the Yanqianshan Iron Mine was designed, with a sublevel height of 22.5 m and a drift spacing of 20.5 m. A physical drawing model was designed, and three physical simulation experiment schemes were conducted to compare and analyse the ore loss and dilution of the intersecting arrangement model and the traditional tangent arrangement model. The results showed that the loss rate decreased by 3.66% and the dilution rate increased by only 0.22%, thus verifying the effectiveness and applicability of the model to optimize the stope structure.

中文翻译：

---

分段放顶开采中采场结构优化的基于孤立抽奖区的动态相交布置模型

本文在孤立开采区为非标准椭球的情况下，考虑了分段放顶开采的采场结构优化，可以通过动态调整IDZ的排列并根据矿石定量IDZ的相交度来实现。损益计算模型。提出了一种基于IDZ的动态相交布置模型，该模型可以根据矿山岩体的整体流动参数，经济指标，矿体，钻床的发生状况等动态调整地层高度和漂移间距。根据该模型，可以计算出漂移间距的范围，较低的残渣矿石量和较高的混合废石量。通过推导矿石损益的函数，建立了矿石损益计算模型，以量化IDZ的交叉程度并确定最佳的采场结构。利用所建立的动态相交布置模型，设计了盐前山铁矿的-213 m至-303 m采场结构，层高为22.5 m，漂移距离为20.5 m。设计了物理绘图模型，并进行了三种物理模拟实验方案，以比较和分析相交排列模型与传统切线排列模型的矿石损失和稀释。结果表明，损失率降低了3.66％，稀释率仅提高了0.22％，从而验证了该模型对采场结构优化的有效性和适用性。