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Theoretical analysis and numerical simulation on protective seam extraction in Mayixi mine
Author(s): 
Pages: 123-127
Year: Issue:  1
Journal: Journal of Mining and Safety Engineering

Keyword:  突出煤层群突出防治保护层选择合理性分析;
Abstract: 煤矿瓦斯事故一直是煤矿事故中死亡人数最多、性质最恶劣的事故.保护层开采是突出矿井开采煤层群,区域性防治瓦斯突出灾害事故的最有效措施.本文在突出煤层群开采过程中采取保护层开采区域性防突技术防治煤与瓦斯突出的理论分析和可行性研究基础上,通过对各煤层的瓦斯赋存特点和煤系地层岩性特征分析,确定保护层;并结合马依西一井保护层选择的关键影响因素分析及其实际情况,通过FLAC3D数值模拟,得出保护层开采过程中上下煤岩体的变形规律.以上理论分析和数值模拟表明,选择5-2煤层作为保护层进行开采,可有效消除上下被保护层的突出危险性,达到区域防突有效治理瓦斯的目的.
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