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| 中厚倾斜矿体开采中改流体放矿技术下矿石损失贫化计算 |
| Calculation of Ore Loss Ratio and Dilution Ratio under Insert Drawing Technique in Steeply Inclined Medium-thick Ore Bodies |
| 投稿时间：2025-03-03 修订日期：2025-03-26 |
| DOI： |
| 中文关键词: 中厚倾斜矿体放矿 改流体放矿 椭球缺放出体 贫化率 回收率 |
| 英文关键词:steeply inclined medium-thick ore bodies insert drawing ellipsoidal void body dilution rate recovery rate |
| 基金项目:国家自然科学(51574151) |
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| 中文摘要: |
| 无底柱分段崩落法开采中厚倾斜矿体易产生损失贫化，针对该问题对倾斜矿体的损失贫化预测进行了研究提出了改流体放矿技术。分析了改流体放矿技术的原理。同时基于椭球体放矿理论，视放出体为椭球缺椭球体缺，推导了中厚倾斜矿体常规截止品位放矿和改流体放矿时的回收率和贫化率计算公式，解决了倾斜矿体贫化损失的动态预测难题。由实验得到放出体参数后，依据该计算公式，可计算出两种放矿方式下的回收率和贫化率。结合放矿物理实验，计算了该物理实验下的理论回收率和贫化率，并用实验数据对计算结果进行了验证。结果表明，理论计算值与实验值基本相符，说明所建立的回收率与贫化率的计算公式具有准确性。该理论公式的提出，为预测和控制中厚倾斜矿体开采时的矿石损失贫化提供了新的思路。 |
| 英文摘要: |
| In response to the issue of loss and dilution in the mining of medium-thick inclined ore bodies using the sublevel caving method, the prediction of loss and dilution of inclined ore body was studiedthe insert drawing technology has been proposed. The principles of the insert drawing technology were analyzed. Drawing upon the ellipsoid draw theory, the drawing body was considered as an ellipsoidal void, leading to the derivation of formulas for the recovery rate and dilution rate for conventional cut-off grade drawing and insert drawing in the mining of steeply inclined medium-thick ore bodies, which solves the problem of predicting the dynamics of the dilution loss of the inclined ore body. By obtaining the parameters of the drawing body and using the derived formulas, the recovery and dilution rate for both extraction methods can be calculated. Combining the specific drawing physical experimental, the theoretical recovery and dilution rate for this physical experiment were calculated and the results were validated using experimental data. The results show that the theoretical calculated values are basically consistent with the experimental values, indicating that the established formulas for calculating recovery rate and dilution rate are accurate. The introduction of these theoretical formulas offers a novel approach for predicting and controlling ore loss and dilution during the mining of steeply inclined medium-thick ore bodies. |
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