外文翻譯---采礦對(duì)煤層底板斷層活化影響的數(shù)值模擬-全文預(yù)覽
【正文】 ed vertical stresses of the rock under the coal bed step down from MPa to extent of the release at the upper part of minedout areas reduces gradually and the vertical stresses increase from MPa to vertical stresses at the footwall of the fault face increase from MPa to MPa. In modelⅡ,the stress is concentrated at the lower part of the orebody on the lower fault block. When the depth increased,the concentration of stress in the rock under the coal bed vertical stresses of the rock under the coal bed step down from MPa to extent of the release of the footwall minedout areas gradually reduces and the vertical stresses increase from MPa to vertical stress at the footwall of fault face is MPa. Distributional characteristics of shear stressesThe distribution of shear stresses at the upper part and the footwall of the fault are obviously distributional characteristics of shear stress isolines are in conflict and the shear stresses are concentrated at the two ends of the modelⅠ,the stresses under the fault face evolve from pressive shear stress to tension shear value ranges from– MPa to– MPa (the minus sign means pressive stress and the positive sign means tension stress).The tension at the upper fault block face of the shear stress area has a value of MPa in the shallow part which gradually increases to MPa in the deeper part. In modelⅡ,the stress above the fault face changed from tension shear stress to pressive shear stress and the values ranged from– MPa to – MPa (again,the minus sign means pressive stress and the positive sign tension stress).The upper part of the fault face is a tension shear stress area and the value gradually reduces from MPa to MPa. Horizontal displacement In modelⅠ,the horizontal pressive displacement on the lower fault block is small。when the workface is on the upper part of the fault,it has a horizontal pressive stress area on the lower fault the workface is at the lower fault block,the maximum vertical displacement is 5 times larger then when the workface is on the upper fault block,which greatly increases the chance of a fatal inrush of water from the coal floor.Key words:mining。Technology,Xuzhou,Jiangsu 221008,ChinaAbstract:By means of the numerical simulation software ANSYS,the activation regularity of coal floor faults caused by mining is results indicate that the variation in horizontal,vertical and shear stresses,as well as the horizontal and vertical displacements in the upper and the lower fault blocks at the workface are almost by mining of the floor rock,there ar
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