富力矿区岩层移动角的分层计算

Stratification Calculation of Strata Displacement Angle in Fuli Mining Area

保安煤柱一般是根据移动角留设的。可是,同一工作面各分层移动角的差别并非观测误差所致,因此通常取其平均值作为最终值是不妥的。移动角应根据具体条件按分层计算选用,本文提出了初次采动的煤层、厚煤层、煤层群的移动角计算方法,采用此法计算既可增大煤炭资源的回收率,又能确保保安煤柱留设的安全性。

Security coal pillar＇s setting is generally determined by the average value of displacement angles on each layer of the same working face,which is inappropriate as the terminal value because the displacement angles aren＇t selected by stratification calculation.The paper firstly presents the calculation method of displacement angles of initially-mining coal seam,thick coal seam and coal seam group,which can not only increase recovery rate of coal resources,but also guarantee the setting safety of security coal pillar.