工作面上覆岩层活动规律的数值模拟分析

Numerical Simulation of Overburden Activities Laws at Working Face

为了研究倾斜薄煤层顶板岩层活动规律,运用RFPA2D软件对原型为水平方向200 m、竖直方向200 m,标高为-214 m～-414 m范围内的岩体建立数值模型,对东风煤矿43002工作面煤层上覆岩层破坏进行数值模拟分析,再现煤层的开采所导致的上覆岩层的活动情况。模拟结果表明:随工作面推进顶板破坏状况越严重,图片中的灰度值表示岩石的受力状态,灰度值小的区域为岩石受剪应力集中区域,灰度值大的区域为岩石受拉应力集中区域。

In order to study the activities laws of the roof strata in inclined thin seam,in this paper,RFPA2Dsoftware is used to establish numerical model for the rock range with the horizontal direction 200 m,vertical direction 200 m and the elevation of-214 m^-414 m.The overburden failure conditions above seam in Dongfeng mine 43002 face are analyzed by numerical simulation,the overlying strata activities conditions caused by seam mining are reproduced.The results show that the roof failure statuses are more serious with the face advancing.The gray value of the picture expresses force state of rock,low gray value expresses shear stress concentration areas of the rock,high gray value expresses tensile stress concentration area of the rock.