https://orcid.org/0000-0002-3481-2619
Figures & data
Figure 1. Model of multi-pillar and goaf group.
Figure 2. Numerical test model of multi-pillar and goaf group at 848 m level.
Table 1. Basic mechanical parameters of rockmass (macro parameters).
Table 2. Input Weibull parameters of rockmass (mesoscopic parameters).
Figure 3. Numerical simulation results of CPF process of multi-pillar (or goaf group).
Table 3. Stress-strain State of multi-pillar system under initial in-situ stress.
Figure 4. Load transfer and sudden jump displacement of multi-pillar. (a) Load-displacement curves of pillars, (b) Displacement-step curves of pillars.
Figure 5. Load-displacement curves and stability analysis of multi-pillar system.
Figure 6. Mechanical model of roof-multi-pillar-floor system.
Figure 7. Schematic diagram of instability evolution process of roof-multi-pillar-floor system.
Figure 8. Comparison between numerical and theoretical results. (a) Sudden jump of roof-multi-pillar-floor system, (b) energy release of roof-multi-pillar-floor system.
Figure 9. Cascading pillar failure and load transfer effect analysis.
Data availability statement
The datasets analyzed during the current study are available from the corresponding author on reasonable request.