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煤层瓦斯压力测定过程中合理注浆压力的研究与应用

Study of Reasonable Grouting Pressure in the Process of Measuring Coal Seam Gas Pressure and Application.

作者信息

Yang Fengfeng, Chen Xiangjun, Zhang Jufeng, Ma Jinkui

机构信息

College of New Energy, Longdong University, Qingyang 745000, China.

State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo 454003, China.

出版信息

ACS Omega. 2023 Jul 14;8(29):25892-25902. doi: 10.1021/acsomega.3c01601. eCollection 2023 Jul 25.

DOI:10.1021/acsomega.3c01601
PMID:37521619
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10373452/
Abstract

Coal seam gas pressure is an important index to evaluate the risk of coal outbursts. The accuracy of measurement is closely related to the quality of hole sealing, and reasonable grouting pressure is one of the key factors to determine the quality of hole sealing. To obtain a reasonable grouting pressure, a mathematical model for slurry flow was established based on the relationship between the seepage law of the slurry and the properties of the borehole surrounding a rock. According to the conditions of the working face 11111 of the coal seam Ji in Pingdingshan No. 13 Coal Mine, the reasonable grouting pressure in the process of hole sealing and pressure measurement were simulated by COMSOL multiphysics numerical simulation software. After comparing the pressure distribution and slurry diffusion characteristics in the borehole under different grouting pressures, it is concluded that the reasonable grouting pressure is 4 MPa. When 4 MPa grouting pressure to seal the hole is used during actual engineering verification, the measured gas pressure is 2.7 MPa, which is more accurate than the result obtained under conditions of sealing with normal pressure grouting.

摘要

煤层瓦斯压力是评估煤与瓦斯突出危险性的重要指标。测量精度与封孔质量密切相关，合理的注浆压力是决定封孔质量的关键因素之一。为获得合理的注浆压力，基于浆液渗流规律与钻孔围岩性质之间的关系，建立了浆液流动数学模型。根据平顶山十三矿己煤层11111工作面条件，利用COMSOL多物理场数值模拟软件对封孔测压过程中的合理注浆压力进行了模拟。通过比较不同注浆压力下钻孔内的压力分布和浆液扩散特性，得出合理注浆压力为4MPa。实际工程验证采用4MPa注浆压力封孔时，测得的瓦斯压力为2.7MPa，比常压注浆封孔条件下得到的结果更准确。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/5bcce8ef1a53/ao3c01601_0011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/6fdcc4262757/ao3c01601_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/8b332dfff8df/ao3c01601_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/22667757e07b/ao3c01601_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/3c76e1defefd/ao3c01601_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/6a42f1b2899d/ao3c01601_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/a76d1bb23cbf/ao3c01601_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/094a6a6bc031/ao3c01601_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/597fa058c455/ao3c01601_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/854265e29836/ao3c01601_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/5bcce8ef1a53/ao3c01601_0011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/6fdcc4262757/ao3c01601_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/8b332dfff8df/ao3c01601_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/22667757e07b/ao3c01601_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/3c76e1defefd/ao3c01601_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/6a42f1b2899d/ao3c01601_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/a76d1bb23cbf/ao3c01601_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/094a6a6bc031/ao3c01601_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/597fa058c455/ao3c01601_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/854265e29836/ao3c01601_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ec0d/10373452/5bcce8ef1a53/ao3c01601_0011.jpg

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