| Most models of tradition theories of bolt support are educed by being predigested mostly, both theory of bolt support and spot bolt support design of present bolt support of coal mine roadway all depart practice more. Research on theory of bolt support is lagged behind of engineering practice, this complexion restricts popularization and application of bolt support technology; spot bolt support design is done after experience analogy mostly, it has large blindness.In this dissertation, based on traditional theory research of bolt support and combined with research results in theory and model of bolt improving mechanics parameter of bolted rock body of others, energy analysis of bolting failure system and composite mechanics analysis of composite improvement of bolted rock are made roundly starting from angle of composite material mechanics and damage mechanics according to acting relation of bolt and surrounding rock. Based on above analysis, stability potential coefficient (safety coefficient) of bolt reinforcing rock body is defined and design method of roadway bolting support based on bolting potential is set up initially. Stress environment of coal mine gate is analyzed and influence of mining stress is expressed quantificationally, relation of roadway of uninfluenced\influenced by mining and width of coal pillar of protecting roadway and stress concentration coefficient of different mining condition are analyzed. Controllable quality of both bolted walls is discussed, mechanics mechanism of both bolted walls is analyzed and two terms of bolted wall are defined and analyzed. Integrative Analysis of gate under complicated stress field is made by numerical simulation and bolting potential coefficient (safety coefficient); this analysis of stability potential coefficient has some reference value for stability estimation of similar roadway and quantitative design of roadway bolting support, it offers a new idea and approach for theory and design research of bolting support. |
