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李子金矿急倾斜矿体爆破参数优化
李电辉
- 作者单位：
- （甘肃省天水李子金矿有限公司）
基金项目：
- 国家重点研发计划项目（2022YFC2905004）
详细信息：
- 作者简介：
- 李电辉（1971—），男，高级工程师，硕士研究生，从事矿山采矿技术、生产管理工作；E‑mail：LDHZDY@126. com
- 通讯作者：
- PDF下载
Optimization of blasting parameters for the steeply inclined orebody in the Lizi Gold Mine
- English Author：
Li Dianhui
- Unit：
- (Gansu Tianshui Lizi Gold Mine Co., Ltd.)
- 摘要
- 在线预览
- 参考文献
摘要:
李子金矿急倾斜矿体开采面临着矿体厚度薄且地质条件复杂的问题，现有采矿方法和工艺难以满足日益严峻的生产需求。为了优化爆破参数，提升矿体破碎效果并降低矿石贫化率，结合数值模拟与现场试验对李子金矿急倾斜薄矿体的爆破参数进行了优化。采用采场围岩与矿体岩石单孔爆破模拟试验，深入分析了现场使用炸药条件下，岩石损伤率与质点峰值振动速度之间的关系。通过对不同炮孔参数组合的分析，确定了最优方案为 0.3 m抵抗线与 0.5 m排距的炮孔组合。优化后的爆破参数有效改善了采场的采空区形态，减少了超挖和欠挖现象，确保了高效、安全的采矿作业。
关键词:
急倾斜矿体；薄矿体；爆破参数优化；数值模拟；岩石损伤；质点振动速度；矿石贫化率
Abstract:
The mining of steeply inclined orebodies in the Lizi Gold Mine faces challenges such as thin orebodythickness and complex geological conditions, and the existing mining methods and technologies are difficult to meet theincreasingly stringent production demands. In order to optimize the blasting parameters, improve the orebody fragmenta‑tion effect, and reduce the ore grade dilution rate, the blasting parameters for the steeply inclined thin ore vein in theLizi Gold Mine were optimized by combining numerical simulation and field tests. By using the blasting simulation testof the surrounding rock of the stope and the orebody rock, the relationship between the rock damage rate and the peakparticle vibration velocity under the condition of the field‑used explosives was deeply analyzed. Through the analysis ofdifferent borehole parameter combinations, the optimal scheme was determined as a borehole combination with a 0.3 mstandoff distance and a 0.5 m row spacing. The optimized blasting parameters effectively improved the shape of the goafin the stope, reduced overbreak and underbreak phenomena, and ensured efficient and safe mining operations.
Keywords:
steeply inclined orebody; thin orebody; blasting parameter optimization; numerical simulation; rockdamage; particle vibration velocity; ore dilution rate
