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基于采空区冒落过程中冒落岩体与空气相互作用中能量的守恒与转化,建立了冲击气浪风速模型,设计制作了模拟实验测试装置。实验表明,随着下落高度增加,冲击气浪风速增加幅度略有减缓,采用大断面空间小尺寸的“打气筒”模型计算能够更好地反映冒落过程中的气体流动过程,但应该以“打气筒”和“绕流”的复合模型表征冲击起浪。在实验基础上建立的实验模型与理论模型有很好的相似性。
Based on the conservation and transformation of the energy in the interaction between the rock mass and the air during the goaf caving process, the wind speed model of the impinging gas wave was established, and the simulation test device was designed. Experiments show that as the drop height increases, the increase of the impact airwave wind speed slightly slows down. Using the small pump “pump ” model of large cross-sectional space can better reflect the process of gas flow, but should Impact impulse was characterized by a composite model of “pump” and “flow”. The experimental model established on the basis of experiments has very good similarity with the theoretical model.