摘要
现有的锚固支护机理应用于金属矿山存在一定的不足,利用大型通用非线性有限元计算分析软件ABAQUS,研究了马钢集团姑山矿业有限责任公司和睦山矿区-300m水平中央变电硐室支护方案中的锚杆锚索联合支护部分,通过分析模拟结果,并结合现场地质雷达探测和长期监测硐室围岩收敛结果,得到了硐室开挖后的应力变化规律、塑性区范围的扩展规律以及支护前后的位移场的变化规律,同时对金属矿山硐室的开挖和支护结构作用机制进行了系统的研究和探索,提出了"应力转移"支护机理的概念。该研究成果验证了原支护方案的合理性,也为其他金属矿山锚固支护方案设计提供了理论依据。
The available anchoring support mechanism is insufficient in certain degree when used for metallic mines. The authors studied, using large universal nonlinear finite element software ABAQUS, the bolt-anchor cable combined support part in the support scheme for the chamber for the central transformer substation at -300m level in Hemushan Mine area of MaSteel Gushan Mining Co. , Ltd. Through the analysis of the simulation results and in light of the results of the site geological radar sounding and long-term monitoring of chamber wall rock constringency, the authors discovered the stress change law of the chamber after its excavation, the expansion law of the plastic zone and the change law of the displacement field before and after the support ; and meanwhile, systematically studied and explored the mechanism of the excavation and support structure of caverns in metallic mines. Based on this, ＂stress transfer＂ support mechanism is put forward. This research achievement has validated the rationality of the original support scheme and also provided a theoretical basis for the anchoring support scheme design for other metallic mines.
出处
《金属矿山》
CAS
北大核心
2008年第3期75-79,102,共6页
Metal Mine
基金
国家自然科学基金重大项目"深部采动覆岩移动规律及巷道稳定性控制研究"(编号:50490273)
