黄金科学技术 ›› 2020, Vol. 28 ›› Issue (5): 727-733.doi: 10.11872/j.issn.1005-2518.2020.05.132
Yumin CHEN1(),Chenglong WANG1,Xiaofei LI1,Xiang JIANG1,Xingdong ZHAO2
摘要:
焦家金矿深部-750 m中段一分巷采场采用上向水平分层充填采矿法,因顶板层状节理发育且节理构造交错分布,导致顶板产生楔形体冒落与层裂破坏,采用传统的锚杆支护难以实现岩体稳定性控制的要求。通过现场工程地质调查和岩石力学试验,确定岩体质量等级为Ⅳ级。运用稳定性图表法,结合矿山实际情况,选择树脂锚索+金属网+喷射混凝土联合支护系统,从理论上计算了合理的树脂锚索支护结构参数。在-750 m中段进行工业试验,结果表明:采用树脂锚索联合支护系统后,岩体的稳定性得到显著提高,通过现场位移监测,进一步验证树脂锚索联合支护系统安全、可靠且有效,为深部复杂构造下开采矿体提供了有力的技术支撑,并积累了一定的实践经验。
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