U型通風下采空區(qū)發(fā)火過程模擬研究與模型改進
發(fā)布時間：2018-11-05 18:16
【摘要】：為了解U型通風下采空區(qū)遺煤層自然發(fā)火過程中,不同時間的溫度和升溫區(qū)的變化,提出使用顆粒流理論為基礎的模型。解決氧的等效、流動和與煤反應的3個基本問題,并用FISH予以實現(xiàn)。根據(jù)實際工況模擬得升溫過程可分為3個階段,并分析了6個發(fā)展時間的升溫特征,得遺煤發(fā)火自燃過程中升溫區(qū)的變化與氧氣流動有很大關(guān)系。采集這6個時間的實際遺煤層溫度,分析與模擬結(jié)果的差別,得到模型還應考慮割煤時在遺煤層內(nèi)部產(chǎn)生裂隙。改進后模型結(jié)果雖與實際升溫區(qū)變化仍存在一定差異,但在升溫時間與溫度的關(guān)系方面更為準確,升溫區(qū)擴散程度也更為接近事實。
[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)大學安全科學與工程學院;礦山熱動力災害與防治教育部重點實驗室;大連交通大學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)大學力學與工程學院;
【基金】：國家自然科學基金(51274110,51474121,51274113);國家自然科學基金煤炭聯(lián)合基金項目(U1261121)
【分類號】：TD752.2
[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)大學安全科學與工程學院;礦山熱動力災害與防治教育部重點實驗室;大連交通大學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)大學力學與工程學院;
【基金】：國家自然科學基金(51274110,51474121,51274113);國家自然科學基金煤炭聯(lián)合基金項目(U1261121)
【分類號】：TD752.2
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