矿用扩径式吸能防冲构件特性数值分析

Numerical analysis on energy absorption and anti-impact properties of mine diameter expanding energy absorption components

为增强液压立柱抗冲性能,有效防治煤矿冲击地压,或在一定程度上减小冲击地压事故造成的损失,提出并设计了一种与液压立柱结合使用的扩径式吸能构件.采用ABAQUS软件对构件吸能防冲特性进行研究,结果表明:不同尺寸和不同材料扩径式构件均具有非常好的稳定变形破坏模式,尺寸、材料和冲击速度对构件变形破坏模式没有任何影响.扩径式构件压缩过程中具有较为恒定的反作用力,反作随构件材料强度和随壁增加而增大,但尺寸、材料和冲击速度对构件力-位移变化规律没有影响.扩径式构件具有一定承载力,具有较小的载荷波动系数和较高的冲程效率.扩径式构件是一种较为理想的吸能防冲构件,其与现有常规立柱结合使用,可改善立柱受冲击载荷时的受力情况,增强立柱防冲性能.

To enhance the anti-impact performance of hydraulic columns, prevent and control the rockburst in coal mine effectively, or to a certain extent, and reduce the losses caused by rockburst accident, this paper put forward a type of diameter expanding energy absorption components combined with hydraulic column. The energy absorption and anti-impact properties of components were studied by using the soRware ABAQUS. The results showed that the diameter expanding components of different size and material has excellent stability and reproducibility deformation and failure modes of reproducibility. Size, material and impact velocity do not have any effect on the deformation and failure modes of reproducibility of the components. The diameter expanding components has a constant reaction force in the process of compression. Size, material and impact velocity does not have any effect on force - displacement change rule of the component. The diameter expanding anti-impact component has a smaller load fluctuation coefficient and higher stroke efficiency. The diameter expanding anti-impact component is an ideal energy absorption and anti-impact component. Using it with the existing conventional hydraulic column, force condition of hydraulic columns under impact load can be improved by the force of the impact load when the post, which strengthens pillar drawing performance, enhances the anti-impact performance of hydraulic columns.