钢构防突风门结构安全性的静动力学分析

Static and dynamic analysis of safety of steel outburst prevention air door

为分析钢构防突风门安全性,基于现场实测数据和理论公式推导出瓦斯突出的载荷峰值计算公式,再依据防突风门工业试验数据,拟合瓦斯突出作用下冲击载荷的曲线方程,通过数值模拟方法研究钢构风门结构在瓦斯突出作用下的静动力学特征,并与目前广泛应用的砖砌结构进行比对。研究表明:当突出点距地表垂深为1 100 m时,钢构结构钢板厚度为3 mm安全性达标;钢构结构的稳定性虽不如砖砌结构,但在瞬态时程分析中,钢构结构与砖砌结构应力变化趋势基本保持一致;钢构防突风门结构安全性能够满足砖砌防突风门结构安全标准。

In order to analyze the safety of a steel outburst prevention air door,a formula for calculating the peak of the load under gas outburst was derived based on mine site data and the theoretical formula. A time course curve equation of the impact load was derived based on the air door pressure data obtained from analog experiments. Static and dynamic characteristics of a steel outburst prevention air door structure under gas outburst were studied by using the numerical simulation method,and a comparison was made between the structure and the brick structure in the mine. The research shows that when the distance between the outburst point and the surface is 1 100 m,steel structure steel plate thickness of 3 mm meets the safety standards,that the stability of steel structure is not as good as the brick structure,but conforms to the safety standard,that in the transient dynamic analysis,the steel structure and the brick structure are similar in the trend in change of stress,and that the safety of the steel air door structure meets the brick structure safety standards.