自然崩落法放矿量与底部结构应力分布关系研究

普朗铜矿运用自然崩落法进行开采,未放出的矿体作用在底部结构之上,易导致矿柱产生受压破坏,威胁底部结构稳定性。利用地压监测手段及时掌握开采过程中底部结构的应力分布情况,可锁定底部结构应力集中区域,并通过研究放矿量与底部结构应力分布的变化关系,优化和平衡各放矿口的放矿计划,调节底部结构应力分布,从而减少应力集中对底部结构的破坏。

Study on the relationship between the ore drawing amount and the stress distribution of bottom structure in natural caving mining process

Pulang copper mine is exploited by natural caving method, and the unreleased ore bodies pile up on the bottom structure, which is easy to cause the crushing damage of the pillar and threaten the stability of the bottom structure. The stress distribution of the bottom structure in the mining process can be timely grasped by using the ground pressure monitoring technology, and the stress concentration area of the bottom structure can be locked. Then, by studying the relation between ore drawing amount and the stress distribution of bottom structure, the ore drawing plan at each ore drawing port can be optimized and balanced, and the stress distribution of bottom structure can be adjusted, so as to reduce the damage of stress concentration on the bottom structure.