板块倾角对折棱管防冲支护装置吸能特性的影响

Influence of plate inclination angle on energy absorption characteristics of pre-folded edge tube anti-scour and supporting device

鉴于煤矿支护设备抗冲击能力差、在冲击地压中易遭受破坏而失效,开发一种结构简单且吸能性能良好的防冲支护装置。对普通方管轴向压缩过程完成数值模拟后,设计折棱管防冲支护装置,并重点研究其板块倾角对其吸能效果的影响。首先,通过有限元数值模拟分析,研究不同板块倾角的防冲支护装置在冲击下的压溃全过程,分析板块倾角对装置吸能效果的影响;其次,将折棱管防冲支护装置与普通方管做吸能性能对比,综合评价折棱管防冲支护装置的优势;最后,结合室内试验,验证折棱管防冲支护装置的最佳板块倾角。结果表明,板块倾角为156°的折棱管防冲支护装置吸能性能最佳。

In view of poor impart resistance ability and failure due to damage in rockburst of the antiscour and supporting equipment,the paper was aimed at developing a new kind of anti-scour and supporting device with great energy absorption performance. After numerical simulation of ordinary square tube axial compression,a pre-folded edge tube anti-scour and supporting device was designed and its energy absorption performance was studied by carrying out a finite element simulation. The effect of the plate inclination angle on the performance was studied. An energy absorption performance comparison was made between the pre-folded edge tube and the square tube. Finally,the best plate inclination angle of pre-folded edge tube anti-scour and supporting device was verified by carrying laboratory experiments. The results show that the pre-folded edge tube anti-scour and supporting device has the best energy absorption perormance.