Calculating arched supports with blocking

Relevance. Improving the stability of driftways and inclined mine workings is an essential task in underground mining. Support efficiency largely depends on the conditions of its contact with the host rocks. When building steel arch supports, much attention is therefore paid to set blocking and contact grouting. Evidence shows that the blocking is important for support stability. Whenever due attention is not paid to this problem, load from shifting rocks transfers to the middle part of capping and causes bending before the support ever reaches the yielding mode. Research objective is to increase the stability of driftways and inclined mine workings by controlling the stress-strain state of frame supports. Research object is steel arch support of driftways and inclined mine workings. Research subject is the calculation and design of steel arch support with control forces. Research task is to develop the methods for calculating frame support using the most rational types of control forces. Methods of research include an integrated research method with scientific generalization of theoretical and experimental works by domestic and foreign researchers, theoretical studies based on the methods of structural mechanics, field observations and experiments, results processing based on the methods of mathematical statistics. Results. It was established by calculations that under symmetrical load, the use of blockings with a given force value of 20 kN increases the bearing capacity of the support by 1.5 times, and under asymmetric load – by 2.3 times. The given calculation data make it possible to determine the rational parameters of support with blocking to ensure stable support for mine workings.