Kovtun A. IMPROVEMENT OF CONTROLLED SPLIT OF STONE BlOCKS TECHNOLOGY BY USING NONEXPLOSIVE DESTRUCTIVE MIXTURES

The thesis is devoted to development of scientific basis and grounding of improved method of stone block extraction with using of NDM and controlling plates named embeddings. The process of detachable split along system of drill holes was investigated in limits of plate problem of elasticity theory with using third strength condition by application of static loads in presence of driving plate with predetermined thickness. It was fined the analytical equation for calculations of technological parameters such as minimal required pressure in drill hole and distance between drill holes as functions of their radius, plate-embedding thickness and properties of geological material. The processes of time depending growth of pulling stresses σx and σy in axial direction of rock massif anisotropy in crystallization processes of NDM was investigated in details. The principles and method of control of generation and formation direction of disengagement split in sector between anisotropy axis of breaking block. The capacity to work of NDM was experimentally investigated and mechanism of strength field control by corresponding orientation of plates-embendings for stone blocks split-off was qualitatively proved. The equipment designed for stone blocks split-off guarantee its reliability and duration of work in industrial conditions. Implementation of proposed system of controlled stone blocks split-off in Katerinian deposit of labrodarite was proved of benefits of designed technology which allows possibility of predictable creation of parameters of static load during environmentally safe process.