防控高温煤岩裂隙的膏体泡沫研制及应用

发布时间：2018-08-06 12:16

【摘要】：煤岩裂隙漏风导致的煤自燃火灾严重危害矿井安全生产,在现有防治煤炭自燃材料的基础上,以聚丙烯酰胺(A)、复合表面活性剂(B)、混合粉体(C)为原材料研制了一种防控高温煤岩裂隙的膏体泡沫。采用正交试验法以保水率、发泡倍数、阻化率为指标优选出了最佳的膏体泡沫配方为A4B4C4:A为70 g/L,B为19.5 g/L,C为270 g/L。对膏体泡沫进行了微观形态表征,并从泡孔尺寸大小及分布、液膜颗粒分布、液膜载体吸水等方面对膏体泡沫的保水、吸热和受热稳定机制进行了分析。最后以南方某煤矿复采工作面煤自燃发火为例,分析和判定了302工作面火区分布,采用钻孔压注膏体对火区高温煤岩裂隙进行控制,3d后工作面1-5#钻孔、三石门密闭处CO浓度从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.
【作者单位】：湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室;湖南科技大学煤矿安全开采湖南省重点实验室;湖南科技大学资源环境与安全工程学院;
【基金】：国家自然科学基金项目(51604110,51274100,51504093,51374003) 湖南省自然科学基金青年科学基金项目(2017JJ3074) 教育部高等学校特色专业建设点项目(TS11624)
【分类号】：TD752.2

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