防灭火喷涂材料黏附及封堵性能试验研究  

Experimental study on adhesive and sealing performance of fire protection spray materials

作　　者：秦汝祥[1,2,3] 谷传尧 康扬 葛小丽 QIN Ruxiang;GU Chuanyao;KANG Yang;GE Xiaoli(School of Safety Science and Engineering,Anhui University of Technology,Huainan Anhui 232001,China;Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining,Huainan Anhui 232001,China;State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]煤炭安全精准开采国家地方联合工程研究中心,安徽淮南232001 [3]深部煤炭安全开采与环境保护全国重点实验室,安徽淮南232001

出　　处：《矿业科学学报》2024年第3期455-463,共9页Journal of Mining Science and Technology

基　　金：国家自然科学基金(51874007);煤炭安全精准开采国家地方联合工程研究中心开放基金(EC2021019)。

摘　　要：为改善煤矿井下巷道喷涂防灭火材料黏附性差,易开裂、易脱落及封堵效果差等问题,研制了一种以粉煤灰为骨料,普通硅酸盐水泥、硫铝酸盐水泥和石膏为基料,可再分散乳胶粉(VAE)为外加剂的防灭火喷涂材料。通过单轴抗压强度实验、煤岩多相多场真三轴动态渗流实验以及扫描电镜实验等,研究了VAE对喷涂材料的黏附性能、胶结性能、力学性能、封堵性能的影响。结果表明,加入VAE可以促进水化产物中丝状黏结桥的形成,实现黏结桥与水化产物的铆接、桥连,构成一个致密的网络结构。这不仅可以提升喷涂材料的抗开裂能力,同时增强了材料与煤结合后的黏附性能、胶结性能以及封堵性能。加入1%VAE的喷涂材料能够充分包裹住煤体,在煤体表面形成致密的涂层,有效隔绝空气与煤体接触,从而预防煤自燃,研发的材料对防治巷道顶部煤自燃具有一定作用。Sprayed fireproofing materials in underground coal mine roadways are limited due to their poor adhesion,easy-to-crack,easy-to-fall off and poor sealing effect.This study therefore develops a fireproofing spraying material with fly ash as aggregate,ordinary silicate cement,sulphur-aluminate cement and gypsum as base material,and re-dispersible latex powder(VAE)as additive.Specifically,we conducted the uniaxial compressive strength test and used coal rock multiphase multi-field triaxial dynamic seepage experimental system,and scanning electron microscopy to study the effects of dispersible latex powder on the adhesive,cementation,mechanical,and blocking properties of the spray material.The results show that adding dispersible latex powder could promote the formation of filamentary bonding bridges in the hydration product,and realize the riveting and bridging of the binder bridges with the hydration products to form a dense network structure.This improves the cracking resistance of the spray material and enhances the material's adhesion,sealing and cementing properties when combined with coal.Adding 1%VAE spraying material can fully encapsulate the coal body,forming a dense coating on the surface of the coal body,effectively isolating the air from contact with the coal body,thus preventing spontaneous combustion of coal.The proposed materials are useful in preventing spontaneous combustion of coal at the top of the roadway.

关 键 词：可再分散乳胶粉 巷道喷涂材料 喷涂堵漏 硅酸盐水泥 硫铝酸盐水泥 

分 类 号：TD752[矿业工程—矿井通风与安全]