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煤矿瓦斯抽采封孔用水泥基材料的试验研究

Experimental Study on the Cement-Based Materials Used in Coal Mine Gas Extraction for Hole Sealing.

作者信息

Fu Jianhua, Wang Dengke, Li Xuelong, Wang Zhiming, Shang Zhengjie, Jiang Zhigang, Wang Xiaobing, Gao Xin

机构信息

School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China.

Zhengzhou Coal Industry (Group) Corporation Limited Liability Company, Zhengzhou 450000, Henan, China.

出版信息

ACS Omega. 2021 Aug 3;6(32):21094-21103. doi: 10.1021/acsomega.1c02911. eCollection 2021 Aug 17.

DOI:10.1021/acsomega.1c02911
PMID:34423217
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8375108/
Abstract

Gas drainage is an important method to prevent and control gas disasters. Sealing materials have an important impact on the gas drainage effect. To improve the extraction rate, the configuration and related characteristics of sealing materials were studied in this study. It was found that the fluidity increased gradually with the increase of the dosage of the suspension concentrate (SC). The water-cement ratio was directly proportional to the setting time of the slurry. Also, the mixing amount of the special cement was inversely proportional to the setting time of the slurry. The influence of the amount of foaming agent, special cement, and suspending agent on the expansion rate of the slurry was positive, and the influence gradually weakened. When the water-cement ratio of cement-based materials was 0.6, the special cement content percentage was 6, the suspension agent content percentage was 3, the plasticizer content percentage was 0.7, the early strength agent content percentage was 1.2, and the foaming agent content percentage was 0.2, the sealing effect was the best. The research results suggest that the porosity and pore length of the cement-based material are smaller than those of polyurethane, and its sealing property was better. This could further increase the sealing effect of the gas borehole, thereby facilitating gas extraction.

摘要

瓦斯抽采是防治瓦斯灾害的重要手段。封孔材料对瓦斯抽采效果有着重要影响。为提高抽采率，本研究对封孔材料的配比及相关特性进行了研究。结果表明，随着悬浮剂用量的增加，流动性逐渐增大。水灰比与浆液凝结时间成正比。特种水泥掺量与浆液凝结时间成反比。发泡剂、特种水泥和悬浮剂用量对浆液膨胀率有正向影响，且影响逐渐减弱。当水泥基材料水灰比为0.6、特种水泥含量百分比为6、悬浮剂含量百分比为3、增塑剂含量百分比为0.7、早强剂含量百分比为1.2、发泡剂含量百分比为0.2时，封孔效果最佳。研究结果表明，水泥基材料的孔隙率和孔径比聚氨酯小，其密封性能更好。这可以进一步提高瓦斯钻孔的密封效果，从而有利于瓦斯抽采。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/4bc0fb1f6f16/ao1c02911_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/ec366cce0dd5/ao1c02911_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/fa008a2b4e79/ao1c02911_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/f6d7aa237be4/ao1c02911_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/440ed776f371/ao1c02911_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/c0653678ab28/ao1c02911_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/3e81228e2c58/ao1c02911_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/1eb36edb6377/ao1c02911_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/4bc0fb1f6f16/ao1c02911_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/ec366cce0dd5/ao1c02911_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/fa008a2b4e79/ao1c02911_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/f6d7aa237be4/ao1c02911_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/440ed776f371/ao1c02911_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/c0653678ab28/ao1c02911_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/3e81228e2c58/ao1c02911_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/1eb36edb6377/ao1c02911_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffe2/8375108/4bc0fb1f6f16/ao1c02911_0009.jpg

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