Regularities of surface subsidence and rocks displacement within the boundaries of local workings

Purpose. To establish typical phases of the earth surface subsidence and rocks displacement on the local workings’ boundary under the influence of the working face movement. Methods. Development of the general picture of earth surface subsidence and rocks displacement on development workings’ boundary. Selection and statistical processing of the experimental data for specific conditions of coal seam caving. Establishment of empirical dependencies and their research using derivatives to determine typical stages of the process. Analysis of the obtained results. Findings. Characteristic stages of the earth surface subsidence and rocks displacement on the local workings’ boundary have been defined. Originality. The start of the earth surface subsidence marks the beginning of the active phase of high rock pressure manifestation in front of the working face ? HRP zone. Practical implications. The results allow to predict the maximum area of rock pressure manifestation and to develop measures for local workings’ maintenance in advance.