Study on observation station layout of non-principal cross section surface movement and parameter calculation method

In order to overcome the environment restriction of the surface ground mobile observation station set up at the location above the principal cross section of the mining block and to let the observation station set occupy less farmland and well pick up the surface ground moving parameters,a method to set up the observation stat ion at the location of the non- principal cross section was applied. From the theoretical feasibility,location selection method and probability integral method to estimate the parameters picked up,the observation results from the observation station at the location above the non- principal cross section were applied to study the method of the mi ning in the mining area affected to the predicted parameters of the surface ground movement. The inspection and application in the actual engineering showed that a displa cement at any point of the surface ground occurred by the mining could reflect the surface ground displacement and deformation law occurred by the mining in the mining a rea. As for the rational selected location of the observation station,the steady close method was applied to get the displacement deformation predicted parameters of the pr obability integral method and could effectively solve the observation data influenced by the topographic condition and repeated mining of the multi coal mining faces in order to reach a same effect with the principal cross section observation station and to well have the surface ground movement law occurred by the mining in the mining area.