| The reinforcement measures and their parameters of the pouring hole of field-pouring Steel Tube Confined Concrete (STCC) are designed by local reinforcement and project conditions, the reinforcing mechanism are analyzed by the uniaxial compression test and numerical simulation, and part parameters are optimized to make up for strength loss for the pouring holes of short columns. The ultimate bearing capacity of STCC short columns is analyzed by limit equilibrium theory and the uniaxial compression experiments. Combined with the test on the compressive resistance of STCC support and numerical simulation, the mechanical properties of STCC support and mechanical relationship between STCC support and surrounding rock are analyzed in roadway support. The theory mechanical model of roadway compression ring enhanced support is analyzed and established by elastoplastic mechanical, in which the weight coefficient of three kinds of supporting ways are determined. The enhanced supporting roles of three kinds of supporting ways on the compression ring of cicular deep soft rock roadway are further analyzed through theoretical analysis and numerical simulation. According to the expansive soft rock surrounding rock geological conditions of main inclined shaft mudstone rock zone of the the Chagannaoer Mine, STCC support supporting programs of shallow bottom arch circular and oval are designed combined with the roadway compression ring enhanced support theory and on-site experience. The supporting programs is shown to meet the requirements of the coal mine roadway support through numerical simulation and field monitoring, which verifies the superiority of STCC support and the applicability of the compression ring enhanced support theory. |
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