【摘要】：為了研究露天煤堆堆放時(shí)內(nèi)部水分含量的動(dòng)態(tài)變化特征,建立了含水煤堆自燃升溫模型,利用數(shù)值模擬研究了煤堆在堆放30d內(nèi)溫度和水分含量的變化過程,結(jié)果表明:煤堆自迎風(fēng)面開始向背風(fēng)面依次形成散熱帶、升溫帶和窒息帶,含水煤堆自燃溫度上升過程依次分為Ⅰ升溫,Ⅱ緩慢升溫,Ⅲ快速升溫。而煤堆內(nèi)水分含量的變化也依次分為Ⅰ緩慢蒸發(fā),Ⅱ快速蒸發(fā)和Ⅲ蒸干三個(gè)階段。依據(jù)結(jié)論對(duì)煤堆內(nèi)部水分含量的動(dòng)態(tài)過程展開進(jìn)一步研究,有助于將濕潤煤體自燃特征規(guī)律的實(shí)驗(yàn)成果應(yīng)用于現(xiàn)場實(shí)踐。
[Abstract]:In order to study the dynamic change characteristics of internal water content in open-pit coal pile, a model of spontaneous combustion temperature rise of water-bearing coal pile was established, and the variation process of temperature and moisture content of coal pile within 30 days was studied by numerical simulation. The results show that the heating-off zone, heating zone and asphyxiation zone are formed from the upwind surface to the leeward surface of the coal pile, and the rising process of spontaneous combustion temperature of the water-bearing coal pile is divided into 鈪，

本文編號(hào)：2348399