Properties of Foamed Gel for Coal Ignition Suppression in Underground Coal Mine
Properties of Foamed Gel for Coal Ignition Suppression in Underground Coal Mine
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DOI：
10.1080/00102202.2018.1523153
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发表时间：
2019-08
影响因子：
1.9
通讯作者：
Qing Guo;Wanxing Ren;L. Bai
中科院分区：
文献类型：
--
作者：
Qing Guo;Wanxing Ren;L. Bai
摘要泡沫凝胶是一种新型的防灭火材料。对泡沫凝胶的制备工艺、结构、关键设备、稳定性及缓蚀效果进行了试验研究。泡沫凝胶具有三维网状结构，由凝胶颗粒和含水泡沫组成。发泡装置是同时产生泡沫和凝胶的关键设备。此外，泡沫凝胶的半衰期超过24 h，是泡沫的6倍多。凝胶颗粒形成的“强节弱杆”结构是提高泡沫凝胶稳定性的关键。利用煤自燃实验装置，通过测定CO的释放量来考察泡沫凝胶的阻化效果，结果表明：在100°C时，泡沫凝胶的阻化率为73.72%，高于CaCl 2的57.35%。现场应用表明，泡沫凝胶能够有效地抑制采空区煤火。
ABSTRACT Foamed gel was developed as efficient material for coal ignition control in fire-prevention techniques. The preparation process, structure, key equipment, stability and inhibiting effect of foamed gel are experimentally studied. Foamed gel possesses three-dimensional net structures, consisted of gel particles and aqueous foam. Foaming device is the key equipment that could generate foam and gel simultaneously. In addition, the half-life of foamed gel is beyond 24 h, which is more than six-folders of foam. The “strong-node and weak-rod” structure formed by gel particles is the key reason enhancing the stability of foamed gel. Further, by using coal spontaneous combustion apparatus, the inhibiting effect of foamed gel is conducted by testing the release of CO. The results show that the inhibiting rate of foamed gel is 73.72%, higher than CaCl2 with 57.35% in 100°C. Meanwhile, field application in coal mine suggests that foamed gel can effectively suppress coal fire in gobs.