A rapid observation method applied to roadway cross-section reduction

作者：Zheng Xi Gui^*; Zhang Nong; Han Chang Liang

来源：Journal of China University of Mining & Technology, 2011, 40(5): 697-701.

• Constant conditions
• Cross section
• Excavation speed
• Method
• Multi-section
• Observation method
• Rapid method
• Regular patterns
• Roadway
• Space between
• Surrounding rock
• Underground pressure observation

A rapid method to obtain underground pressures is presented. A regular pattern of surface convergence of the roadway is used for the analysis. The convergence of different cross sections of the roadway is observed, over time and at various spacing, for constant conditions in the surrounding rock, the supports, the excavation speed, and the excavation quality. Long term patterns in roadway convergence over time are obtained. Slow excavations with lower underground pressures require fewer observations overall and the space between observations may be increased. In contrast, rapid excavation requires more closely spaced observations taken more often. The method was successfully applied to the air return roadway in a coal mine. A 26 day pattern of surface convergence was obtained after one week observing five sections: The time required is one quarter of the time used for the traditional observation method.

• 出版日期2011
• 单位中国矿业大学（北京）