• 全部
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
采空区大掺量粉煤灰无机固化泡沫制备及特性研究
  • Title

    Preparation and characteristics of inorganic curing foam with large-volume fly ash in goaf

  • 作者

    马砺杜素张照允王慧赵亮张波

  • Author

    MA Li;DU Su;ZHANG Zhaoyun;WANG Hui;ZHAO Liang;ZHANG Bo

  • 单位

    西安科技大学安全科学与工程学院山东兖矿能源股份有限公司

  • Organization
    College of Safety Science and Engineering, Xi’an University of Science and Technology
    Shandong Yankuang Energy Co., Ltd.
  • 摘要
    煤矿采空区漏风是引发煤火灾害的重要原因,传统充填堵漏材料易干裂,流动性差,成本高,因此研发出有效充填封堵漏风通道的新型材料十分必要。通过单因素变量法,以材料流动度、初凝时间、抗压强度为指标进行配比优选,研发出大掺量粉煤灰无机固化泡沫充填堵漏新材料。同时,利用红外光谱、X射线衍射仪、扫描电镜表征材料的水化过程。结果表明∶基于泡沫均匀度、发泡倍数、半衰期及析水率等参数,优选出十二烷基硫酸钠(SDS)∶辛癸基葡糖苷(APG)=1∶1,黄原胶(XG)∶瓜尔胶(GG)=1∶1的水基泡沫。研发的大掺量粉煤灰无机固化泡沫,其初凝时间与粉煤灰掺量、水灰比、泡沫掺量成正比;流动度与水灰比成正比,与粉煤灰掺量成反比,随泡沫掺量增加先上升后缓慢降低;抗压强度随粉煤灰掺量增加呈先增加后减小趋势,与水灰比和泡沫掺量呈反比关系。综合评价指标确定粉煤灰掺量为60%、水灰比为0.6、泡沫与复合浆液体积比为1∶1时,材料流动度好,为15.9 cm,初凝时间适中,为5 h,抗压强度高,28 d达到1.5 MPa。该材料的水化产物是钙矾石(AFT)以及C-S-H凝胶,由水泥先发生水化反应生成Ca(OH)2,后与粉煤灰反应生成AFT及C-S-H凝胶,提高了大掺量粉煤灰无机固化泡沫抗压强度,能够适应采空区堵漏的要求。
  • Abstract

    Air leakage in the goaf of coal mine is an important cause of coal fire disaster. The traditional filling and plugging materials are easy to crack, with poor fluidity and high cost. Therefore, it is necessary to develop new materials for effective filling and plugging of the air leakage channels. Herein, the new filling and plugging material of inorganic curing foam with large-volume fly ash was developed by optimizing the mix ratio based on material fluidity, initial setting time and compressive strength using the single factor variable method. Meanwhile, the material hydration process was characterized by the infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The results show that the water based foam with sodium dodecyl sulfate (SDS)∶decyl glucoside (APG) of 1∶1 and xanthan gum (XG)∶guar gum (GG) of 1∶1 is selected based on the foam uniformity, foaming multiple, half-life and water separation rate. The initial setting time of the inorganic curing foam with large-volume fly ash is proportional to the amount of fly ash, water cement ratio and foam content. The fluidity is proportional to the water cement ratio water and iversely propotional to the amount of tlyash content based on the fluidity decreases with the increasing of fly ash content, and increases first and then decreases slowly with the increasing of foam content. The compressive strength of inorganic curing foam with large-volume fly ash increases first and then decreases with the increasing of fly ash content, but it is inversely proportional to the water cement ratio and foam content. According to the comprehensive evaluation indexes, the material fluidity is good at 15.9 cm, the initial setting time is moderate at 5 h, and the compressive strength is great, reaching 1.5 MPa at 28 d when the fly ash content was 60%, the water-ash ratio is 0.6, and the volume ratio of foam to composite slurry is 1:1. The hydration products of the material include ettringite (AFT) and C-S-H gel. The hydration reaction of cement first generates Ca(OH)2, and then the Ca(OH)2 reacts with fly ash to generate AFT and C-S-H gel, thereby improving the compressive strength of inorganic curing foam with high-volume fly ash, which is capable of satisfying the requirements leakage blocking in goaf.

  • 关键词

    大掺量粉煤灰无机固化泡沫抗压强度水化反应采空区堵漏

  • KeyWords

    high-volume fly ash;inorganic curing foam;compressive strength;hydration reaction;leakage blocking in goaf

  • 基金项目(Foundation)
    国家自然科学基金重点项目(52174206);陕西省高校青年创新团队项目(22JP047);
  • 文章目录
    1 原材料及方法
    1.1 原材料
    1.2 实验方法
    1.2.1 无机固化泡沫制备
    1.2.2 测试方法
    2 结果与讨论
    2.1 表面活性剂及稳泡剂对泡沫性能的影响
    2.1.1 表面活性剂对泡沫性能的影响
    2.1.2 稳泡剂对泡沫性能的影响
    2.2 大掺量粉煤灰无机固化泡沫性能
    2.2.1 流动度
    2.2.2 初凝时间
    2.2.3 大掺量粉煤灰无机固化泡沫抗压强度的变化规律
    2.3 大掺量粉煤灰无机固化泡沫水化过程
    2.3.1 FT-IR测试
    2.3.2 物相组成
    2.3.3 微观形貌
    3 结论
  • DOI
  • 引用格式
    马砺,杜素,张照允,王慧,赵亮,张波.采空区大掺量粉煤灰无机固化泡沫制备及特性研究[J].煤田地质与勘探,2023,51(02):243-251.
  • Citation
    MA Li,DU Su,ZHANG Zhaoyun,et al. Preparation and characteristics of inorganic curing foam with large-volume fly ash in goaf[J]. Coal Geology & Exploration,2023,51(2):243−251
  • 相关专题
  • 图表
    •  
    •  
    • 泡沫发泡倍数、析水率和半衰期随表面活性剂含量和配比的变化趋势

    图(9) / 表(0)

相关问题

主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

©版权所有2015 煤炭科学研究总院有限公司 地址:北京市朝阳区和平里青年沟东路煤炭大厦 邮编:100013
京ICP备05086979号-16  技术支持:云智互联