Microseismic Monitoring System for the Management of Seismic Hazard and Rock Bursting and Distribution of Crack
Keywords:
Energy storage rate, Energy waste, Distribution of rockburst, Triaxial compressive testAbstract
Rockburst is one of the most significant risks that threaten the safety of underground and surface stability and mine operators. Few methods have been generated to evaluate rockburst potential in underground hard rock mines depending on Energy Release Rate (ERR), energy balance, and critical energy and strain Energy Storage Rate (ESR). In this research, a Peak Strength Strain (PSS) of ESR is suggested to estimate and categorize the tendency of rock materials to burst into granite. The energy storage rate index is the elastic Strain Energy Density (SED) rate to the dissipated SED correlated to the peak Compressive Strength (CS) on granite under four orders of magnitude loading ratio. Accordingly, a triaxial unloading limited pressure test was conducted to provide the linear elastic ESR characteristics. Through the use of the Q system, an empirical analysis was performed to check the ratio of to estimate the rockburst. Thus, a twenty-day delay in strain monitoring further changed the PS energy. The findings indicated that the PS energy is roughly 1.3–1.4 times greater than the linear elastic Strain Energy (SE) under the same limited pressure. The deep granite's modified maximum SE value was substantially raised when the time-delay strain effect was considered. The peak strength energy values were raised from 1.0 × 104 J/m3 to 1.8 × 104 J/m3, respectively. Also, the intensity and tendency of rockburst were compared while considering the benefits of the SE index model of rockburst. The primary stress point under various limited pressures was estimated, and the linear elastic SE of deep granite was computed. The test findings show that the linear elastic SED value exhibits a linear growth rule when limited pressure increases. Besides, due to the limited pressure of , the linear elastic SED value of granite is near to . The rock burst grades provided a clear incline ratio after considering the time delay of SE and PS energy. The SED is raised by , under the limited pressure. A proper SE technique could bring precise data support for rockburst analysis.
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