西安科技大学学报2025，Vol.45Issue(3)：450-460,11.DOI:10.13800/j.cnki.xakjdxxb.2025.0303
冲击载荷作用下密闭体能量转换与耗散特性
Energy transfer and dissipation characteristics of airtight airbag under impact load
摘要
Abstract
The high temperature and gas accumulation environment in the roadway after the coal mine fire tends to cause secondary explosion disaster,and the development of disaster can be effectively con-trolled by rapid sealing in the disaster area.In order to study the impact strength of the sealed body,a visual tube type gas explosion test system was used to carry out explosion impact tests of the capsule wall material of the sealed body at 7vol.％,9.5vol.％and 10.5vol.％methane volume concentra-tions,respectively,so as to analyze the energy absorption characteristics of the capsule wall material.The dynamic response process of the closed body at the impact height of 20,30,40 cm and 50 cm was examined by the drop hammer impact test system,and the energy conversion and dissipation character-istics of the closed body were analyzed.The results show that when the concentration of methane gas is 7vol.％,the explosion overpressure is reduced by 0.206 MPa,and 88.70％of the impact energy is dissipated in the form of thermal energy through the convection heat transfer between the capsule wall material and the outside air,and the energy dissipation rate is 127.58 J/s.With the increase of meth-ane concentration,the proportion of impact energy absorbed through the deformation of the wall material increases.When the impact height of the drop hammer is 50 cm,the impact load of the closed body is 54.6 kN,and 64.62％of the impact energy is absorbed through the deformation of the wall material and the gas compression,and 51.39％of the absorbed energy is released through the recovery of the deformation of the wall material and the gas expansion.With the increase of the impact height,the im-pact load increases gradually,and the energy dissipation and energy dissipation rate increase.During the impact process,the impact energy is transformed into the elastic potential energy and the internal energy of the gas by the deformation of the capsule wall material,and the heat energy is dissipated by the heat dissipation and damping effect of the gas during the isothermal compression process.The re-search could provide theoretical guidance for the rapid sealing technology of coal mine disaster area.关键词
矿井密闭/爆炸冲击/缓冲吸能/能量耗散Key words
mine closure/explosive impact/cushioning energy absorption/energy dissipation分类
矿山工程引用本文复制引用
马砺,陈超扬,刘红亮,张嘉勇,娄芳..冲击载荷作用下密闭体能量转换与耗散特性[J].西安科技大学学报,2025,45(3):450-460,11.基金项目
国家自然科学基金项目(52174206) （52174206）
陕西省高校青年创新团队建设科研计划项目(22JP047,21JP074) （22JP047,21JP074）
新疆维吾尔自治区重点研发项目(2022B01034-2) （2022B01034-2）
