煤矿通风系统风门窗结构抗冲击设计优化

Optimization of Impact-resistant Design for Air Door and Window Structures in Coal Mine Ventilation Systems

  • 摘要: 针对深部煤矿开采中0.3~0.5 MPa瓦斯爆炸冲击波易引发风门窗失效的安全难题,以开采深度680~950 m、年产120万t的煤矿为工程背景,聚焦传统风门窗结构缺陷,从结构形式、布局方式及关键参数三方面开展系统性优化设计。采用Q355B工字钢等构件构建一体化抗变形系统,创新对称布置双通风单元,明确钢梁截面尺寸为400 mm×200 mm×10 mm等核心参数。性能测试表明,优化后的风门窗门板永久变形量降至(7.9±0.4)mm,节点残余位移仅1.3 mm,密封泄漏量为(2.3±0.3)m3/min,结构完好率达96.5%,在长期服役及不同冲击角度工况下均表现出优异的抗冲击性能与结构稳定性。该研究有效提升了深部煤矿通风安全设施的抗冲击能力,为同类矿井瓦斯爆炸冲击波防控提供了技术支撑与设计范式。

     

    Abstract: To address the safety challenge of wind door and window failures caused by 0.3-0.5 MPa gas explosion shockwaves in deep coal mining, this study focuses on optimizing the structural design of traditional wind doors and windows from three aspects: structural form, layout method, and key parameters. The engineering context involves a coal mine with a mining depth of 680-950 m and an annual production capacity of 1.2 million tons. The integrated anti-deformation system was constructed using components such as Q355B I-beams, featuring an innovative symmetric arrangement of dual ventilation units. Key parameters, including a steel beam cross-section size of 400 mm×200 mm×10 mm, were clearly defined. Performance tests demonstrated that the permanent deformation of the optimized wind door and door panels was reduced to (7.9±0.4) mm, with a residual displacement at the joints of only 1.3 mm. The sealing leakage rate was (2.3±0.3) m3/min, achieving a structural integrity rate of 96.5%. The system exhibited excellent impact resistance and structural stability under long-term service and varying impact angles. This research effectively enhanced the anti-impact capabilities of deep coal mine ventilation safety facilities, providing technical support and design paradigms for preventing and controlling gas explosion shock waves in similar mines.

     

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