摘要
以蔚州煤田单侯矿为例,分析下奥陶统富水特征和下组煤底板带压规律,研究下奥陶统顶部隔水关键层存在条件和厚度,计算下组底板采动破坏带深度和有效隔水层厚度,预测下组煤底板下奥陶统突水危险性,评价下组煤带压开采可行性。研究表明:蔚州煤田单侯矿下奥陶统顶部存在约25m厚隔水关键层,隔水关键层使大面积受水压威胁下组煤得以解放。
Taking Danhou Colliery as an example,this paper analyzed hydrological characteristic of Ordovician period and floor water pressure rule of lower coal-seam.Existence condition of key strata against water in top of Ordovician period and its thickness was researched.It calculated depth of floor damage induced by mining and effective aquiclude thickness,predicted water-burst danger and evaluated feasibility of mining with water pressure.Result showed that about 25m thick aquiclude exist in top of lower Ordovician period and it could provide protection for mining lower coal influenced by water pressure.
出处
《煤矿开采》
北大核心
2011年第4期48-51,共4页
Coal Mining Technology
基金
国家重点基础研究发展计划(973)资助项目(2007CB209400)
关键词
下组煤
隔水关键层
带压开采
lower coal
key strata against water
mining with water pressure
