本文選題：高溫裂隙　切入點(diǎn)：封堵　出處：《硅酸鹽通報(bào)》2017年05期 　論文類(lèi)型：期刊論文

【摘要】：煤巖體受熱破壞形成的高溫煤巖裂隙是煤田火區(qū)演化和蔓延的主要成因。水泥基泡沫流體作為一種新型的高溫煤裂隙防控材料,其泡沫流體的耐熱特性是其重要的技術(shù)參數(shù)。基于自制泡沫流體隔熱性能測(cè)試系統(tǒng),測(cè)試了不同支架高度(2 cm、7 cm、12 cm、17 cm、22 cm)和不同噴注厚度(20 mm、40 mm、60 mm、80 mm)情況下水泥基泡沫流體的隔熱特性,得出隨著測(cè)試時(shí)間的增加,20~80 mm各個(gè)噴注厚度的新鮮泡沫流體冷面溫度都增加,在測(cè)試時(shí)間為0~90 s以?xún)?nèi),溫升曲線斜率較大;隔熱溫度空間分布整體在一個(gè)曲面上,進(jìn)而擬合得到了隔熱溫度、噴注厚度、熱面溫度三者之間的關(guān)系式。受熱情況下泡孔液膜微觀形態(tài)變化表征顯示泡沫流體在200℃出現(xiàn)失穩(wěn)定,并從表面張力、液膜基質(zhì)粘度、自由水含量三個(gè)方面分析了受熱對(duì)液膜排液速度的影響。
[Abstract]:The thermal fracture of coal and rock mass is the main cause of evolution and spread of coal field fire zone. Cement based foam fluid is a new kind of high temperature coal fracture prevention and control material. The heat resistance of foam fluid is an important technical parameter. The thermal insulation properties of cement-based foam fluid were tested under the conditions of different support heights (2 cm, 7 cm, 12 cm, 17 cm, 22 cm) and different injection thickness, 20 mm / 40 mm / 60 mm / 80 mm). The results show that the cold surface temperature of the fresh foam fluid with different injection thickness increases with the increase of testing time. When the test time is less than 90 s, the slope of the temperature rise curve is large, the thermal insulation temperature is distributed on a curved surface, and the thermal insulation temperature and the injection thickness are obtained. The relationship between hot surface temperature and surface temperature. The microscopic morphology of bubble liquid film under heating condition showed that the foam fluid was unstable at 200 鈩，

本文編號(hào)：1567111