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从动力学方面对上下交叠采空区隔层顶板在爆破动力荷载作用下的稳定性进行了分析与研究。为降低爆破震动对隔层顶板稳定性的影响,提出有效措施。研究的主要内容有以下几方面:分析了阻尼、动荷载强度、频率对顶板岩层动力响应的影响规律,并对采空区顶板在动静荷载共同作用下的动力响应进行了分析。应用工程实例验证了理论研究,结果表明:该研究可作为判断顶板稳定性的重要判据之一,可以为矿体开采时矿房矿柱尺寸设计以及每次爆破装药量大小提供一些理论依据。
From the aspect of dynamics, the stability of upper and lower overlapped gob roof is analyzed and studied under the action of blasting dynamic load. In order to reduce the impact of blasting vibration on the stability of the compartment roof, put forward effective measures. The main contents of the research are as follows: The influence of damping, dynamic load intensity and frequency on the dynamic response of roof strata is analyzed, and the dynamic response of roof in goaf under dynamic and static loads is analyzed. The results show that this study can be used as one of the important criteria to judge the stability of the roof and provide some theoretical basis for the size design of ore pillars and the size of charge per burst .