U型通風(fēng)下采空區(qū)發(fā)火過程模擬研究與模型改進(jìn)
[Abstract]:A model based on particle flow theory is proposed to understand the change of temperature and temperature in different time during the spontaneous combustion of coal seams in goaf under U-type ventilation. Three basic problems of oxygen equivalence, flow and reaction with coal were solved and realized by FISH. According to the actual conditions, the heating process can be divided into three stages, and the characteristics of the six development time are analyzed. It is concluded that the variation of the heating zone in the spontaneous combustion process of the residual coal has a great relationship with the oxygen flow. After collecting the actual residual coal seam temperature for 6 hours and analyzing the difference between the results and the simulation results, it is concluded that the fracture in the residual coal seam should also be considered in the model. Although the results of the improved model are still different from the actual temperature range, the relationship between the heating time and the temperature is more accurate, and the diffusion degree of the temperature region is closer to the fact.
【作者單位】: 遼寧工程技術(shù)大學(xué)安全科學(xué)與工程學(xué)院;礦山熱動(dòng)力災(zāi)害與防治教育部重點(diǎn)實(shí)驗(yàn)室;大連交通大學(xué)遼寧省隧道與地下結(jié)構(gòu)工程技術(shù)研究中心;遼寧工程技術(shù)大學(xué)力學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金(51274110,51474121,51274113);國家自然科學(xué)基金煤炭聯(lián)合基金項(xiàng)目(U1261121)
【分類號】:TD752.2
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