Demin, V. F. and Kamarov, R. K. and Zhumabekova, A. E. (2022) DEVELOPMENT OF GEOTECHNOLOGICAL METHODS FOR STRENGTHENING THE DISTURBED ROCK MASS. UNIVERSITAS Publishing,. pp. 77-93.

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English abstract

Objectives of the research: practical usage analysis of roof bolting in coal mines; mining and geological conditions assessment of the preparatory minings; research of the stress-strain state of the rock mass around the workings; development of technological schemes of anchorage; determination of the influence of anchorage technology on the operational characteristics of mining operations. The main idea is to develop geotechnological methods and test the strengthening effect on the disturbed coal-bearing massif during man-made processes. The result of the study is to provide safe conditions for maintaining mine workings, the stability of the immediate roof, reducing rock falls and increasing the service life of the support. Subject of research: operational underground workings of coal mines. Methodology: analysis of maintenance conditions; assessment of factors that negatively affect the conduct of mining operations; determination of the manifestations of rock pressure; development of methods and means of active fastening of the broken coal-bearing array. The purpose of the work is to develop technological schemes for conducting preparatory workings of coal mines using anchoring in difficult mining and geological conditions. Research results: development of geotechnological methods for strengthening the disturbed massif. A method of two-level fixing with a complex overlap of the roof fixing zones over the workings, with the imposition of strengthening zones in the resulting rock arch, has been developed; a method for fixing the excavation in the zone of influence of cleaning works by means of stitching unstable rocks of the immediate roof and then fixing the created artificial "bridge" to the strong rocks of the main roof; mesh tightening to perceive the load from rocks in the space between the anchors and prevent the precipitation of rock mass; a method for combating soil heaving of preparatory workings by spacer blocking the disturbed rock blocks with power spacer modules.

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