Stress Transfer Theory and Technology for High Stress Roadways 633
The range of plastic zone and fractured zone in high stress roadways was wide; surrounding rock was destroyed badly and the support cost was very high thus made mining extremely difficult. It’s the key problem and research emphasis in surrounding rock controlling. Surrounding rock stress was transferred from shallow to deep, which is the basic technical approach to controlling the deformation of surrounding rock, and keeping roadway in well maintenance condition. Aimed at mechanics mechanism of high stress roadways, the law of stress transfer in mining influence space is studied by use of Green function and formula, and put forward stress transfer theory. According to different surrounding rock conditions and controlling desire, five new technologies on remedying high stress roadways are put forward through theoretic study, mechanics calculation and engineering practice, which contains driving roadway in roof, loose blasting and driving roadway in floor, upward mining, loose blasting and grouting reinforcement in floor, driving advanced bore hole or destressing notch in roadway head. Research and application indicates, stress transfer theory and technology offers a new theoretical platform and effective technical approaches, and can be used in remedying high stress roadway in mine or support in other underground project.