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ZHENG Qun, YU Guofeng, QIU Wenge, CHEN Haozhe, LIU Yang. Research on energy-consuming support structures with limited resistance in large deformation roadways[J]. Mining Safety & Environmental Protection.
Citation: ZHENG Qun, YU Guofeng, QIU Wenge, CHEN Haozhe, LIU Yang. Research on energy-consuming support structures with limited resistance in large deformation roadways[J]. Mining Safety & Environmental Protection.

Research on energy-consuming support structures with limited resistance in large deformation roadways

  • In order to solve the problems of "high ground stress, large deformation and damage to the support structure" encountered during deep coal mining. The deformation monitoring and numerical simulation method is used to study the deformation characteristics of the surrounding rock in the soft rock roadway of the deep shaft, taking the eastern auxiliary trackway of Zhuji East Mine as the engineering background. Based on the concept of energy-consuming support of the surrounding rock, a "limiting support resistance dampener" is designed to control the energy release and deformation of the surrounding rock of the roadway, referred to as "limiting dampener". The relationship between the performance indexes and the design parameters of the damper specimen is obtained through a combination of numerical analysis and indoor hydrostatic testing, and the performance of the damper is verified; finally, the deformation and stresses of the conventional and energy-consuming forms of support are compared by numerical simulation to verify the feasibility of the energy-consuming support scheme. The results show that:(1) the test compression of the restrictor reached more than 80%, with a large deformation stroke, to reduce the pressure of the surrounding rock and dissipate the energy of the surrounding rock under the premise of ensuring the large deformation of the initial support. (2) The maximum main stress value of the energy dissipating support of the restrictor is reduced by 51.2% and 89.8% respectively compared with the conventional support of the roadway, which improves the safety of the structure.
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