黄金科学技术 ›› 2020, Vol. 28 ›› Issue (3): 345-352.doi: 10.11872/j.issn.1005-2518.2020.03.026
于世波1,2,3(),杨小聪1,2,3(),原野1,3,王志修1,3
Shibo YU1,2,3(),Xiaocong YANG1,2,3(),Ye YUAN1,3,Zhixiu WANG1,3
摘要:
深部区域采矿时序是深部地压管控的重要战略方法之一,其卸荷力学效应与回采时序密切相关。针对构建的深部由中心向四周回采的立体式大区域开采力学模型,基于应力转移过程和岩爆应力风险特征,研究从单个采场到多个采场回采过程中的应力演化规律和岩爆应力风险变化规律。研究结果表明:深部从中心到四周的立体式回采顺序能够实现采矿作业区高应力的逐步转移和应力风险的渐进推移,深部区域采矿时序的地压调控卸荷效应是通过回采时序的合理设置实现期望的卸荷应力环境再造和深部采矿应力风险的渐进转移过程行为。基于数值模拟与微震监测相结合的互馈分析技术,实现大区域数值模拟与微震监测大数据的高度融合、实时动态分析与跟踪评价,是深部区域采矿时序的地压调控卸荷效果评价的有效方法。深部开采区域时序调控卸荷效应的本质是主动创造高应力环境中低值应力卸荷区思想,这一思想已在加拿大Nickel Rim South矿得到了实践应用,取得良好的卸荷效果并实现了地压的合理管控,对于我国深部、超深部开采具有重要的指导意义。
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