Krukovsky A. The scientific basis of technology support-anchor fastening of mining workings of coal mines

The object of research - geomechanical processes in the border rock mass of coal mine workings, taking into account spatial and temporal parameters of the building of roof bolting. The purpose of the work is developing of the scientific basis of technology support-anchor fastening for various purposes, which is based on the laws of formation construction from anchors and the rock mass blocking the possibility of spontaneous disintegration of rocks in the vicinity of mine working. Research methods: analysis and synthesis of theoretical and experimental data of support-anchor fastening in different geological conditions, mine experimental studies and monitoring the operational status of mining workings and roof bolting using industry equipment, methods of statistical estimation, the theoretical study of the methods of continuum and discrete mechanics, numerical modeling using finite element method. The new concept of technology of support-anchor fastening were proposed to control their stability, which ensures keeping the rock mass in triaxial compression state forming construction in the border rock space of the breed-anchor elements with a high safety margin. The classification of roof bolting constructions on a simple, enhanced and powerful were developed and justified. Spatial-temporal patterns of influence of construction parameters of AK on the state of border rocks were established. A new method for calculating the parameters of the stress-strain state of rock mass and roof bolting construction during the providing technology process cycle of installation anchors rows, taking into account the unloading of the rock mass during the cycle and entry into the work of anchors row at a given time. The regulatory document, which governs the parameters of technology support-anchor were developed and approved. Recommendations for location scheme of roof bolting for capital and development workings for 370 mines of 19 mines were developed and implemented, and the actual economic effect by reducing the cost of maintenance and repair of the workings in the amount of 92 381 thousands UAH were obtained.