井巷掘进爆破对邻近围岩的损伤及锚杆锚固力影响的数值模拟研究
首发时间:2005-07-28
摘要:利用ANSYS的强大隐式分析,针对具体工程实例计算岩体自重下围岩的变形,并把计算得到的节点位移当作初始条件加到DYNA显式动力分析上,然后进行爆炸的显式分析,分析了围岩的有效应力、质点的速度以及爆炸作用对掘进头邻近侧帮锚杆支护的影响,为合理选取支护形式和支护时间提供理论依据。
关键词: 巷道掘进力学模型 ANSYS软件 围岩自重 爆炸载荷 锚杆锚固力
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Numerical Simulation of Shaft and Drift Excavation Blasting Influenced the Damage of Adjacent Surrounding Rock and Bolt’s Anchorage Force
Abstract: Utilizing ANSYS’s strong implicit analysing trait, analyzed the deformation of rock by gravity, regarding calculated nodals displacements as the initial condition of LS-DYNDA explicit analyzing, analyzed effective stress and point velocity of surrounding rock and the influence of blasting effect to anchor bolt support of driving heard lateral wall, providing a basement theory to choose supporting form and time in reason.
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井巷掘进爆破对邻近围岩的损伤及锚杆锚固力影响的数值模拟研究
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