| Popis: |
This article presents the results of research into the properties of physical and mechanical properties of rocks and their influence on the conditions of their occurrence in the coal-bearing massif, depending on the geological structure of a particular section of the rock massif and the relief of the area, to develop an experimental method of inspection of preparatory workings and the development of safety pillars. As a result of the research carried out, it was revealed that geological structures, tectonic stress fields, physical and mechanical properties of rocks and the relief of the earth surface of the deposit regularly reflect the values of shear angles, safe depth of development. These regularities can be used to forecast and estimate the boundary of the zone of dangerous influence of underground mining and the duration of the shear process. The physical and mechanical properties of rocks, determined by the depth of occurrence of rocks, tectonics and fracturing, humidity, relief of the surface of the deposit. The results of the research will allow to estimate the safe depth of underground workings, the nature and duration of rock shear processes, to reveal the zones of dangerous influence of underground workings, and will increase the efficiency of the method developed by the authors for inspection of preparatory excavations and mining of safety pillars in the conditions of the Sulukta lignite deposit. New values of physical-mechanical properties and dependences for rocks of Sulukta lignite deposit were obtained, which are valuable for designing and planning of safety pillars mining. |
