Results of loading of support underground investigations of extracting working and longwall equipment set in end areas of longwalls were exposed. They took into account structure of percarbonic rock mass, represented by laminate massif of soft rocks.

Results of stress-strain state (SSS) of cracked layered massif researches in roof, walls and lying wall were shown. Recommendations concerning stability increase of rock uncovering by means of its hardening with help of bolt and frame-bolt supports, which operate in united bearing system were given.

The features of the numerical modeling was research by finite element method taking into account the impact on the development of stress-strain state of the "undermined massif-support of stope", of the time and the destruction of its individual elements.

General requirements for induction heating of machine parts connections with a purpose of their dismantling are substantiated. The methodology for the specific surface power and other mode parameters determining that meet formulated requirements is developed. The influence of electromagnetic field parameters on the character of thermal process development is shown.

Mechanism of interaction of a rock massif with rock bolt is developed and simplified tubular rock bolt construction is designed, manufacturing of which is combined with the installation in one process - blast of an explosive linear charge in the internal cavity of tubular shell located in a blast hole. Basic requirements of bolt support are substantiated and positive features of tubular bolt are noted.