摘要
通过对朱庄煤矿Ⅲ4414工作面上覆岩层的特征研究,利用FLAC模拟软件对中厚岩浆岩顶板在采动下的变行破坏规律进行了模拟。模拟结果表明：Ⅲ4414工作面采空区顶板冒落高度在6m左右,裂隙的高度最大发育到火成岩顶部,距煤层底板25-28 m。在此基础上布置的上隅角高位钻孔瓦斯抽采率与相邻工作面相比,提高了近2倍,改善了工作面的安全生产状况。
With the study on the overburden strata features above No.Ⅲ4414 coal mining face in Zhuzhuang Mine,the FLAC simulation software was applied to the simulation of the deformation failure law of the medium thick magmatic rock roof under the mining activities.The simulation results showed that the roof falling height in the goaf of No.Ⅲ4414 coal mining face was about 6 m,the max height of the cracks was developed to the top of the igneous rock,which was 25-28 m in distance to the seam floor.In comparison with the neighbour coal mining faces,the gas drainage rate with the high level boreholes drilled at the top corner would be increased by 2 times and could improve the safety production status of the coal mining face.
出处
《煤炭科学技术》
CAS
北大核心
2011年第7期17-20,共4页
Coal Science and Technology
基金
国家自然科学基金资助项目(40872103)
"十一五"国家科技支撑计划资助项目(2007BAK28B02)
关键词
采动裂隙
FLAC
岩浆岩顶板
上覆岩层
瓦斯抽采
mining-induced crack
FLAC
magmatic rock roof
over burden strata
gas drainage
