Failure mechanism and control technology of longwall coalface in large-cutting-height mining method
Failure mechanism and control technology of longwall coalface in large-cutting-height mining method
复制标题
大采高综采工作面破坏机理及控制技术
DOI：
10.1016/j.ijmst.2015.11.018
复制
发表时间：
2016
影响因子：
11.8
通讯作者：
Kong Dezhong
中科院分区：
文献类型：
--
作者：
Wang Jiachen;Yang Shengli;Kong Dezhong
长壁工作面稳定性控制是大采高采煤法的关键技术。因此，在我国大采高采煤法的发展过程中，需要对影响工作面稳定性的因素及其控制技术进行系统的研究。经现场实际观测和多年研究发现，采煤工作面95%以上的破坏形式为剪切破坏。建立了工作面剪切破坏分析模型，对采高、煤体强度、顶板载荷、支架阻力、工作面翻板保护板水平力等因素进行了系统研究。同时，对影响工作面稳定性因素的敏感性分析表明，提高工作面的支护能力、煤体的凝聚力和降低工作面顶板载荷是提高工作面稳定性的关键。利用UDEC软件对影响工作面稳定性的因素进行了数值模拟，模拟结果与理论分析一致。介绍了大切高采煤法工作面注浆结合椰索加固技术。通过室内试验验证了其加固效果，并在多个煤矿进行了实际应用，效果良好。减少大采高采煤法工作面破坏已成为目前的主要技术。
The stability control of longwall coalface is the key technology of large-cutting-height mining method. Therefore, a systematic study of the factors that affect coalface stability and its control technology is required in the development of large-cutting-height mining method in China. After the practical field observation and years of study, it was found that the more than 95% of failures in coalface are shear failure. The shear failure analysis model of coalface has been established, that can perform systematic study among factors such as mining height, coal mass strength, roof load, support resistance, and face flipper protecting plate horizontal force. Meanwhile, sensitivity analysis of factors influencing coalface stability showed that improving support capacity, cohesion of coal mass and decreasing roof load of coalface are the key to improve coalface stability. Numerical simulation of the factors affecting coalface stability has been performed using UDEC software and the results are consistent with the theoretical analysis. The coalface reinforcement technology of large-cutting-height mining method using the grouting combined with coir rope is presented. Laboratory tests have been carried out to verify its reinforcement effect and practical application has been implemented in several coal mines with good results. It has now become the main technology to reduce longwall coalface failure of large-cutting-height mining method.
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DOI：
10.1016/j.ijmst.2014.11.005
发表时间：
2015
影响因子：
11.8
作者：
Zhu Changxing;Chang Xu
通讯作者：
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DOI：
10.1016/j.ijmst.2013.04.002
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DOI：
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发表时间：
2005
期刊：
Coal science and technology
影响因子：
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作者：
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通讯作者：
Wang Jia-chen
DOI：
--
发表时间：
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期刊：
Journal of China Coal Society
影响因子：
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作者：
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通讯作者：
Wang Jia-chen