摘要
运用RFPA-flow数值模拟软件,对关键层位于距离煤层顶板30 m处开采过程的上覆岩层垮落现象及随工作面推进过程中上覆岩层中瓦斯气体渗流速度变化规律进行了数值模拟。通过对实验结果的分析可知,开采过程工作面前方形成了卸压区、应力集中区、稳压区、原岩应力区,上覆岩层的来压步距为15 m左右,上覆岩层中瓦斯渗流速度随煤层的开采,呈现出先升高,后降低,再升高的变化趋势。
Using the RFPA - flow numerical simulation software, numerical simulation of overburden caving phenomenon during mining process that overburden strata is away from the roof about 30 m and gas seepage velocity changing laws of the overburden strata with the working face advancing are performed. The analysis results of experiment show that the pressure relief zone, stress concentration zone, pressure stable zone and rock stress zone are formed in front of the working face during the mining process. The weighting step of over- burden strata is about 15 m. Gas seepage velocity in the overburden strata presents variation tendency of increasing first, the decreasing later and then increasing.
出处
《煤矿安全》
CAS
北大核心
2013年第5期19-21,25,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51174198
50834005)
煤炭资源与安全开采国家重点实验室自主课题资助项目(SKLCRSM11X01)
关键词
上覆层岩
采动裂隙
瓦斯渗流
数值模拟
关键层
overlying strata
mining fissure
gas seepage
numerical simulation
the overburden strata
