Phenomenon of underground working encapsulation: identification, modeling and appliance
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Purpose. To substantiate principles of rock pressure usage during underground mining of deposits. The methodology. Establishment of zonal structuring indices of massif around mine workings with help of industrial, laboratory and theoretical research of stress-strain state of rock massif is executed. Research of entropy influence on energy exchange and deformations developments in undisturbed rock massif is executed with help of entropy method. Research of preventive capsules formation processes around mine workings and forms of energy transition into work of rock deformation is executed with help of energy method. Development of geo-energy approaches for the choice of development workings pathways and calculation of their bolting parameters and also substantiation of stoping operations conducting parameters in energy zones of preventive capsules is executed one estimation of geo-energy technologies effectiveness and realization of industrial implementation during underground mining of deposits. Findings. Physical essence of zonal capsulation phenomena of mine workings is revealed. Geo-energy principles of rock pressure energy usage are substantaited. Resource-saving technologies of mining of mineral depositis are created and implemented into production. The originality. Systematization of phenomena picture, capsulation processes and regularities by massif of mine workings with determination of shape, sizes, quantity of energy zones, sinusoidal-damping stresses and ring modules of deformation by means of complex account of geo-energy factors that allow to use energy of rock pressure in underground mining technologies systematically. Practical implications. Development of energy theory of zonal capsulation parameters research of mine workings: shapes, sizes, quantity and conditions of formation of energy zones and borders of possible destruction of the massif. Establishment of power dependences of changing the sizes of adjacent power zones which ratio is a constant from the sizes and shape, depth of laying and physical properties of massif that containing mine working. Improvement of thermodynamic theory of massif that doesn't disturbed by workings by means of taking into account the processes of geo-energy streams redistribution and entropy exchanging with allocation into undisturbed massif in a separate entropy method of research. Further development of the sinusoidal-fading dependence of auto-wave fluctuations of stresses in massif that broken by mine workings from gradients of density, temperature, gas-and water saturations of rocks is given.