同家梁矿采区煤柱回收煤岩层的冲击性测试研究

The Percussive Test Research of Recycling Coal Strata for Mining Pillar in Tongjialiang Coal

为了给同家梁煤矿煤柱回收冲击矿压发生机理及防治措施研究提供基础数据,以其11号煤层为研究对象,通过室内岩石力学实验,探讨了其煤样和顶底板岩样的容重、单轴抗压强度、单轴抗拉强度、弹性模量、泊松比、凝聚力和内摩擦角等指标,掌握了其煤岩层的物理力学性质。进而分析了同家梁煤矿11号煤及围岩的冲击倾向性,得出了以下结论:同家梁矿11号层煤在煤层冲击倾向性分类中属于3类,为具有强冲击倾向性的煤层;其顶、底板岩层在岩石冲击倾向性分类中也属于3类,为具有强冲击倾向性的岩层。

In order to provide basic data for reseach on pillar recycling rock-burst occurrence mechanism and prevention measures,11# coal seam was researched through the indoor rock mechanics experiments.The physical and mechanical properties of the coal strata were investigated by exploring the bulk density of its coal samples,roof and floor,uniaxial compressive strength,uniaxial tensile strength,elastic modulus,Poisson＇s ratio,the cohesive force and internal friction angle.Then,percussive tendentiousness of 11# coal and rock for Tongjialiang Coal was analyzed and the following conclusions were reached.11 # coal layer of Tongjialiang Coal belongs to class Ⅲ in coal seam percussive tendentiousness classification,which is the coal with strong percussive tendentiousness.Its roof and floor rock strata also belongs to class Ⅲ in the rock percussive tendentiousness classification,which is the rock layer with strong percussive tendentiousness.