The diagrams for supporting workings by floor and roof bolts are considered, which allow to reduce the swelling of floor rocks and manifestations of rock pressure. The degree of influence of mining and engineering factors on the bolting effectiveness of workings is established.

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The regularities of changes in the stress-strain state of coal in rock mass depending on the main mining geological and engineering factors are identified. Using these factors, it is possible to find the optimal support parameters in specific conditions to increase the stability of preparatory mine workings. The degree of influence of mining and engineering conditions of exploitation on displacements in marginal rocks with various types of support in excavation workings is investigated.

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