【摘要】：煤巖裂隙漏風導致的煤自燃火災嚴重危害礦井安全生產,在現有防治煤炭自燃材料的基礎上,以聚丙烯酰胺(A)、復合表面活性劑(B)、混合粉體(C)為原材料研制了一種防控高溫煤巖裂隙的膏體泡沫。采用正交試驗法以保水率、發(fā)泡倍數、阻化率為指標優(yōu)選出了最佳的膏體泡沫配方為A4B4C4:A為70 g/L,B為19.5 g/L,C為270 g/L。對膏體泡沫進行了微觀形態(tài)表征,并從泡孔尺寸大小及分布、液膜顆粒分布、液膜載體吸水等方面對膏體泡沫的保水、吸熱和受熱穩(wěn)定機制進行了分析。最后以南方某煤礦復采工作面煤自燃發(fā)火為例,分析和判定了302工作面火區(qū)分布,采用鉆孔壓注膏體對火區(qū)高溫煤巖裂隙進行控制,3d后工作面1-5#鉆孔、三石門密閉處CO濃度從520 ppm,465ppm,523 ppm,305 ppm,289 ppm,750 ppm下降到22 ppm,18 ppm,23 ppm,14 ppm,14 ppm,36 ppm。
[Abstract]:Coal spontaneous combustion fire caused by coal rock fissure air leakage seriously endangers mine safety production, and on the basis of existing prevention and cure of coal spontaneous combustion materials, A paste foam for controlling coal and rock fissures at high temperature was developed by using polyacrylamide (A), composite surfactant (B), mixed powder (C) as raw material. The optimum formula of paste foam was obtained by orthogonal test with the index of water retention, foaming ratio and resistance rate. The optimum formula of paste foam was A4B4C4:A = 70 g / L ~ (-1) B = 19.5g / L ~ (-1) C = 270g / L ~ (-1). The microscopic morphology of paste foam was characterized. The mechanism of water retention, heat absorption and heat stability of paste foam was analyzed from the aspects of pore size and distribution, liquid membrane particle distribution and liquid membrane carrier water absorption. Finally, taking the spontaneous combustion of coal in a remining face of southern coal mine as an example, the distribution of coal spontaneous combustion area in face 302 is analyzed and determined. The borehole pressure paste is used to control the cracks of coal and rock at high temperature in the fire area for 3 days and the working face 1-hole is drilled. The CO concentration in the closed area of Sanshimen decreased from 520 ppm 465 ppm ~ 523 ppm ~ 305 ppm ~ (-1) ~ (289) ppm ~ (-1) ppm to 22 ppm ~ (18) ~ (18) ppm ~ (23) ~ (14) ppm ~ (-1) ~ (14) ppm ~ (-1) ~ (36) ppm.
【作者單位】： 湖南科技大學南方煤礦瓦斯與頂板災害預防控制安全生產重點實驗室;湖南科技大學煤礦安全開采湖南省重點實驗室;湖南科技大學資源環(huán)境與安全工程學院;
【基金】：國家自然科學基金項目(51604110,51274100,51504093,51374003) 湖南省自然科學基金青年科學基金項目(2017JJ3074) 教育部高等學校特色專業(yè)建設點項目(TS11624)
【分類號】：TD752.2

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