摘要
依据淮南矿区某矿的地质采矿条件制作模型,进行物理模拟试验,研究下保护层煤层工作面推进过程中,采动覆岩结构运动规律、采动裂隙动态演化与分布特征及被保护层煤层的应力变化和膨胀变形等规律.研究表明,在下保护层开采过程中,开采离层裂隙可发育到约100 m高,采裂高厚比达44;被保护煤层沿走向卸压保护范围达到30 m以上、卸压保护角为54°;在采空区四周形成一个离层裂隙发育的"O"形圈,其周边宽度约34 m;被保护煤层的卸压瓦斯可通过它被抽采出来.
Physical simulation was carried out with the model made according to the geological mining conditions of a certain mine in Huainan mining area. During the process of coal seam advancement at lower protective seam, the motion rule of mining-induced overburden rock, the dynamic evolution and distribution feature of mining-induced fissures, and stress changes and the deformation of protected seam have been investigated. The result indicates that during the process of lower protective seam mining, the bed separation fissures can develop to a height of 100m, forming a O-shaped ring of 34 m in radius around the gob, making it able for pressure relief gas in protected seam to be extracted.
出处
《采矿与安全工程学报》
EI
北大核心
2008年第3期253-257,共5页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2007CB209400)
国家自然科学基金项目(50490270,50564087,50004008)
国家“十一五”科技支撑计划项目(2006BAC09B01)
煤炭资源与安全开采国家重点实验室开放研究基金项目(07KF14)
关键词
远距离
保护层开采
覆岩
变形特征
remote
protective seam mining
overburden rock
deformation characteristics
