DU Mingchao，ZHANG Kun，HUANG Liangsong，et al. Comparison and analysis of energy absorption characteristics of chiral structure in novel energy buffering absorption device[J]. Coal Science and Technology，2023，51（S1）：396−403
. DOI: 10.13199/j.cnki.cst.2022-1138| Citation: |
DU Mingchao，ZHANG Kun，HUANG Liangsong，et al. Comparison and analysis of energy absorption characteristics of chiral structure in novel energy buffering absorption device[J]. Coal Science and Technology，2023，51（S1）：396−403 . DOI: 10.13199/j.cnki.cst.2022-1138
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In this paper, a novel energy buffering absorption device is designed to reduce the impact damage of advance hydraulic support caused by mining disturbance and rock burst, and to improve the service life of the support equipment. As an independently designed modular unit, this new type of energy buffering absorption device is installed on the upper of the top beam of the advanced hydraulic support by bolts, which can effectively buffer the peak incoming pressure, provide sufficient buffer time for the opening of the hydraulic support safety valve, and greatly reduce the occurrence of bending, fracture and even cylinder explosion of the hydraulic support column. Focusing on the structural parameters and material properties of the core energy absorber, the deformation response characteristics, cushioning characteristics and energy absorption characteristics of six chiral honeycomb structures with different materials are compared and analyzed. The results show: ① Under the same impact load condition, the compression deformation of rubber Tri-chiral structure is the largest (172.1 mm), while that of nylon Hexa-chiral structure is the smallest (5.83 mm); ② The peak value of the incoming pressure buffered by the nylon Hexa-chiral structure is the largest (
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