煤体采动导致煤层原始平衡应力发生变化,引起工作面前方支撑压力发生变化,使其上覆岩层发生失稳变形,形成采动应力分布的不同影响区。通过RFPA数值模拟软件,对工作面推进过程中覆岩裂隙动态演化规律进行模拟,得出覆岩随工作面推进的垮落高度及来压步距,同时得到采动影响下煤层底板应力变化与横三区及支撑压力峰值的变化规律。 Coal mining causes the original balance stress of coal seam to change, causing the support pressure in front of the work surface to change, causing instability deformation of the overlying strata and forming different influence zones of mining stress distribution. Through the RFPA numerical simulation software, the dynamic evolution rule of the overlying strata fissures during the advancing process of the working face is simulated, and the caving height and pressure step of the overlying strata advancing along the working face are obtained. At the same time, Horizontal area and supporting pressure peak value of the law of change.