Regularities of deformation of preparatory workings for reuse in weak rocks of the Western Donbas

Due to the influence of moistening and rheological processes, deformation characteristics of rocks decrease. This causes an increase in the actual displacements in the reuse workings compared to the calculated ones, which is not taken into account in the calculations, but is relevant for the mines of Western Donbas. Therefore, the purpose of this work is to conduct field measurements to determine the main regularities of deformation of the roof and soil of the workings in the zone of influence of cleaning works. The method of calculation of displacements for the conditions of mines of Western Donbas assumes constant and uniform in time (except for the initial period of 20...40 days after the excavation) growth of displacements of the rock contour of the excavation even outside the zone of influence of cleaning works. The monitoring data presented in this paper indicate the unsatisfactory condition of the workings that are reused. This indicates the imperfection of the calculation methodology. The study presents the results of surveying instrumental measurements and monitoring of the condition of preparatory workings during their reuse. The regularities of deformation of excavations under the influence of cleaning works in the conditions of Western Donbas are established.