Development of a research methodology and analysis of the stress state of a parting under the joint and downward mining of coal seams

Purpose. The investigation of the stress-strain state (SSS) of a parting under the joint and downward mining of coal seams. Methods. The studies have been carried out on the basis of a computational experiment by means of the finite elements method, mining observations of rock pressure manifestations and their comparative analysis. Findings. A research methodology has been developed of the parting rocks state under the joint and downward mining of coal seams. Originality. The patterns of the stress-strain state change of the parting rocks have been determined in the process of joint mining of two coal seams by the descending order. Practical implications. The conducted researches will make possible to improve stability of mine workings and their repeated use.