摘要
为了给采空区瓦斯抽放高位钻孔的设计提供依据,通过物理相似模拟实验,研究分析了东欢坨矿3088工作面覆岩破坏规律。通过研究发现,由于工作面上覆岩层中的灰白色细砂岩具有遇水软化的特性,从而使得采场上覆岩层纵向裂隙在该岩层呈现周期性贯穿-非贯穿的规律,而灰白色细砂岩的这一周期性破坏规律对瓦斯升浮具有重要影响,为达到良好的瓦斯抽放效果,给出了采场抽放钻孔进行高低搭配设计的建议。
In order to offer references for design of gob gas drainage with high-level borehole,Simulation experiment is made to study the law of overlying strata fall for 3088 working face in Donghuantuo Mining.Since off-white fine sandstone with the character of softening when meeting water,the character makes longitudinal fracture of off-white fine sandstone in overlying strata present the law of periodical penetration-no penetration by studying.The law of periodicity has important influence on float upward of gas.In order to gain better gas drainage result,the suggestion which design high level borehole combined with low borehole in working face for gas drainage is given in the paper.
出处
《煤矿安全》
CAS
北大核心
2011年第9期5-8,共4页
Safety in Coal Mines
基金
华北科技学院科技基金资助项目(2011A01)
关键词
模拟实验
覆岩破坏规律
软化
瓦斯抽放
simulation experiment
law of overlying fall
softening
gas drainage
