摘要
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。
Gas accidents in coal mine have been considered as one of the worst coal mine disasters and often cause lots of death of miners. The protective extraction method is the most effective and regional way to prevent coal and gas outburst when multiple coal seams are mined in the outburst mine. In this paper, based on the theoretical analysis and feasibility study of applying the protective extraction tech- nique to prevent outburst during multiple coal seams mining, the protective coal seam was determined by analyzing gas occurrence characteristics of each seam and the lithology of coal formation. Mean- while, by considering the key influence factors for the selection of protective coal seam and the practical situations in Mayixi Coal Mine, the deformation rules of coal and rock mass during the mining process of protective seam were obtained by the numerical simulation of FLAC3D. The theoretical analysis and numerical simulation results show that choosing No. 5-2 Coal Seam as the protective seam to be mined first, can greatly eliminate outburst danger for the upper and lower protected seams, and achieve the goal of outburst prevention and gas control in region.
出处
《采矿与安全工程学报》
EI
北大核心
2013年第1期123-127,共5页
Journal of Mining & Safety Engineering
基金
煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM11X01)
国家自然科学基金项目(51174198)
关键词
突出煤层群
突出防治
保护层选择
合理性分析
outburst coal seam group
outburst prevention
protective seam selection
reasonable analysis
