Large Section Roadway chamber surrounding the control and anchoring support technique
|School||Taiyuan University of Technology|
|Keywords||Large section roadway Different layers Shapes Numerical Simulation Boring way|
With the expansion of mining , large-scale mining equipment , mining depth increases, the roadway is gradually increased, resulting roadway surrounding rock during excavation of the complex changes in the physical properties of the state , thereby causing a complex state of stress redistribution to dig and supporting the roadway has brought new problems. Therefore , to carry out a large section roadway stability supporting research on mine safety in production to provide efficient and reliable protection . This paper summarizes the analysis of current domestic and foreign large section roadway surrounding rock control and anchor support technology , based on a Tunliu Lu'an Group , Sima , High River mine chamber large section roadway engineering background , the use of theoretical analysis, numerical calculations and field experimental observations and other methods for large section roadway surrounding rock control and anchor support technology issues were discussed . 1 ) Through the analysis of the factors affecting the stability of surrounding rock of High River mine two roadway tunnel junctions were simulated analysis reveals that the impact of the kick drum on the roadway is more serious, so should be targeted for roadway reinforcement supports. 2 ) the location of rock on the roadway which were optimized . When in the sandstone, sandy mudstone, coal formations in three different intensity large section of roadway surrounding rock stability analysis, the roadway when the roadway is located in the sandstone rock stable. 3 ) Through the rectangle and straight wall semi- arched two different cross-sectional shape of roadway stress, displacement, destruction, displacement of the top and help compare and choose favorable for stability of roadway cross-sectional shape . 4 ) for different excavation rock mechanical effects caused by simulation analysis to explore the large section of roadway excavation reasonable steps. Excavation for roadway excavation methods and corresponding tunneling support for the corresponding analysis reveals roadway failure mechanism, failure mode , select a reasonable means of excavation and support .