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大采高工作面煤壁片帮机理与注浆加固技术。

Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face.

机构信息

School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.

出版信息

Sensors (Basel). 2022 Nov 10;22(22):8675. doi: 10.3390/s22228675.

DOI:10.3390/s22228675
PMID:36433271
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9694655/
Abstract

To control the problem of coal wall spalling in large mining height working faces subject to mining, considering the Duanwang Mine 150505 fully mechanized working face, the mechanism of coal wall spalling in working faces was investigated by theoretical analysis, numerical simulation and field experiment. Based on analysis of coal wall spalling in the working face, a new grouting material was developed. The stress and plastic zone changes affecting the coal wall, before and after grouting in the working face, were analyzed using numerical simulation and surrounding rock grouting reinforcement technology was proposed for application around the new grouting material. The results showed that: (1) serious spalling of the 150505 working face was caused by the large mining height, fault influence and low roof strength, and (2) the new nano-composite low temperature polymer materials used have characteristics of rapid reaction, low polymerization temperature, adjustable setting time, high strength and environmental protection. Based on analysis of the working face coal wall spalling problem, grouting reinforcement technology based on new materials was proposed. Industrial tests were carried out on the working face. Field monitoring showed that the stability of the working face coal wall was significantly enhanced and that rib spalling was significantly improved after comprehensive anti-rib-spalling grouting measures were adopted. These results provide a basis for rib spalling control of working faces under similar conditions.

摘要

为控制受采动影响的大采高工作面煤帮片帮问题，以段王矿 150505 综采工作面为工程背景，采用理论分析、数值模拟和现场试验等方法对工作面煤帮片帮机理进行研究。在分析工作面煤帮片帮原因的基础上，研制出一种新型注浆材料，利用数值模拟分析了工作面注浆前后煤帮应力及塑性区的变化，提出了基于新型注浆材料的围岩注浆加固技术。研究结果表明：（1）150505 工作面片帮严重是由于大采高、断层影响和顶板强度低所致；（2）所使用的新型纳米复合低温聚合材料具有反应速度快、聚合温度低、可调节凝固时间、强度高、环保等特点。基于对工作面煤帮片帮问题的分析，提出了基于新材料的注浆加固技术，并在工作面进行了工业性试验。现场监测表明，采用综合防片帮注浆措施后，工作面煤壁稳定性明显提高，煤帮片帮得到明显改善。该研究成果为类似条件下的工作面片帮控制提供了依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/6d6ace974eff/sensors-22-08675-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/0fedbd4be91a/sensors-22-08675-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/4c3f8f84ef49/sensors-22-08675-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/4c6062b047f9/sensors-22-08675-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/cd5084d4ee3a/sensors-22-08675-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/bdd54ea8d15f/sensors-22-08675-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/519f1ae6d6c0/sensors-22-08675-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/1044b81bf170/sensors-22-08675-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/ef92a372f6b2/sensors-22-08675-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/6d6ace974eff/sensors-22-08675-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/0fedbd4be91a/sensors-22-08675-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/d89cc578c7b3/sensors-22-08675-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/24c9aebb8a20/sensors-22-08675-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/3f2239815216/sensors-22-08675-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/fcb7c246d2bf/sensors-22-08675-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/4c3f8f84ef49/sensors-22-08675-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/4c6062b047f9/sensors-22-08675-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/cd5084d4ee3a/sensors-22-08675-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/bdd54ea8d15f/sensors-22-08675-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/519f1ae6d6c0/sensors-22-08675-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/1044b81bf170/sensors-22-08675-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/ef92a372f6b2/sensors-22-08675-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/304d/9694655/6d6ace974eff/sensors-22-08675-g013.jpg

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