Damage assessment of mine seal under blast impact load

doi:10.16265/j.cnki.issn1003-3033.2021.01.019

Abstract

Abstract: In order to study anti-explosion performance of typical brick seals in coal mines, ANSYS software was used to establish a numerical model to study damage of seals under explosion impact. Firstly, characteristics of gas explosion and propagation characteristics of shock wave pressure caused by it in roadway were analyzed, and pressure intensity amplitude of shock waves was predicted. Then, a numerical model of seals was established and simulation experiments of impacts under various impulse and pressure loading modes were designed and conducted. Finally, by using self-defined damage variables and simulation results, P-I curve damage diagram of brick seals was made. The results show that damage state of seals under different combinations of impacts varies significantly. As explosion in reality may be more complex, damage threshold equation and P-I curve damage diagram of brick seals obtained in this paper can be used to determine damage state of seals under other explosion impacts.

Key words: seal, damage assessment, gas explosion, P-I curve, impact load

CLC Number:

X913.4

CHENG Jianwei, ZHANG Xixi. Damage assessment of mine seal under blast impact load[J]. China Safety Science Journal, 2021, 31(1): 132-137.

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