采空区顶板裂隙带发育高度判定方法

Determination method of the height of roof fissure zone in goaf

基于煤层上覆岩层参数,利用关键层理论判别上覆岩层的关键层:即第一亚关键层、第二亚关键层和主关键层,结合裂隙带判别方法,确定了某矿2027工作面覆岩破坏裂隙带的上边界为煤层上方46.24 m处。冒落带高度为6.59 m,裂隙带下边界为煤层上方6.59 m处,最终确定采动裂隙带范围为煤层上方6.59~46.24 m。

based on the parameters of overlying strata under coal seam,using the key strata theory,the primary key stratum and inferior key strata in overlying strata were determined.According to the discriminant method of fissure zone,it is determined that the upper boundary of the overlying fissure zone in No.2027 mining face is 46.24 m above the coal seam,the height of the caving zone is 6.59 m,and the range of the overlying fissure zone is 6.59~46.24 m above the coal seam.