煤矿采空区火与瓦斯复合灾害实验系统设计

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中图分类号：TD712/752 文献标志码：A

Abstract： Similarity simulation experiments offera direct and visual method for reproducing the formation and evolutionprocess offireand gas compound disasters ina goaf.However，existing experimental platforms sufer from issuessuchasthe lackofatheoretical basis fordeterminingsimilarityratios，small geometric dimensions，andoverly simplistic system structures，making it dificult to realisticallyreplicate thecomplex environmental characteristics of an underground goaf.To address this issue，the designprinciples foraphysical similarity model of a stope were introduced.Based on the equations for mass，momentum，and energy conservation，aswellas theconcentrationequationwithinthegoaf，similarity theorywasapplied toderiveand quantify the proportional relationships among the physical parameters of the experimental platform.A similarity experimental system for fire and gas compound disasters in a goaf was designed.The system was primarily composed of the following core units： aphysical similarity model of the stope，which served as the foundational platform;acoal spontaneous combustion simulation unit to simulate the process of coal spontaneous combustion;a flammable gas simulationunit to establish the gaseous environment in the goaf; a real-time gas information acquisition and analysis unit to analyze changes in gas information within the physical model; and an inversion analysis unit for the fire and gas compound disaster， which performed the ful-process simulation and inversion analysis of the coupled disaster chain of coal spontaneous combustion，gas accumulation，and explosion in the goaf.The results of the comparative analysis revealed that the system was capable of achieving a flexible configuration of the experimental environment while ensuring geometric similarity. The proposed system demonstrates significant advantages over existing systems with respect to simulation function，similarity， parameter control， operational convenience， and the reliability of experimental results.

Key words： goaf; fire and gas compound disaster; similarity simulation experiment; physical similarity model of stope; similarity transformation; proportional relationship

0引言

随着我国煤矿开采深度和强度增大，开采环境发生剧烈变化，采空区火与瓦斯复合灾害问题也日趋严重和复杂[1-2]。（剩余15218字）