## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Date** & **Mine** & **Accident Area** & **Casualties and Property Losses** & **Direct Cause of the Accident** \\ \hline
17 January 2017 & Danshuigou coal industry & \begin{tabular}{c} Co., ltd (Shuozhou City, \\ Shanxi Province, China) \\ \end{tabular} & Headgate of 4203 fully & Ten fatalities and loss of 15.2 million RMB & \begin{tabular}{c} Roadway roof collapsed, \\ and the rock burst was \\ caused by mining-induced \\ stress \\ \end{tabular} \\  & \begin{tabular}{c} High in situ stress, stress, \\ concentration area was \\ formed by the \\ \end{tabular} \\  & \begin{tabular}{c} High in situ stress, stress \\ concentration of faults, coal \\ and rmits stresses; \\ rock burst was caused by \\ such as fault cutting \\ High in situ stress; high \\ the disturbance of \\ pressure relief borehole \\ during construction and \\ disturbance of nearby \\ fault \\ \end{tabular} & \begin{tabular}{c} High in situ stress, high \\ the disturbance of \\ pressure relief borehole \\ during construction and \\ disturbance of nearby \\ fault \\ \end{tabular} \\  & \begin{tabular}{c} Longjabao coal industry \\ co., ltd (Changchun City, \\ Jilin Province, China) \\ \end{tabular} & Headgate of 305 fully & Nine fatalities and loss of 19.1 million RMB & \begin{tabular}{c} High in situ stress, high \\ stress concentration area; \\ the disturbance of \\ pressure relief borehole \\ during construction and \\ disturbance of nearby \\ fault \\ \end{tabular} \\  & \
\begin{tabular}{c} Longjabao coal industry \\ co., ltd (Changchun City, \\ Jilin Province, China) \\ \end{tabular} & Headgate of 305 fully & Nine fatalities and loss of 19.1 million RMB &
\begin{tabular}{c} High in situ stress, high \\ horizontal tectonic stress; \\ increased regional stress \\ due to mining activities; \\ mining induced fault \\ reactivation \\ High tectonic stress; \\ peninsula-shaped coal \\ pillar with highly \\ concentrated stress; \\ superimposed adjustment \\ stress, high concentration \\ of mining-induced stress; \\ disturbance due to mining activities \\ activities \\ Large-scale overhang roof \\ caused local high stress \\ concentration; mining \\ disturbance on the \\ working face induced \\ fault slip in the wedge \\ graben area \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Major rock burst disasters occurred in China the past five years. bumps. However, most of the superimposed static and dynamic loading tests are generally performed by using the split Hopkinson pressure bar (SHPB) [31; 32; 33; 34], which is suitable for higher strain rates surpassing \(10^{1}\) s\({}^{-1}\)[35]. As a result, the superimposed static and dynamic tests on rock specimens using the servo-controlled rock mechanical test system (MTS) may be more in line with the actual situation in coal mines. Recently, laboratory experiments were conducted to understand the mechanical properties of rock specimens in coal mines under superimposed static and dynamic loads, and the characteristics of the stress-strain curve, mechanical parameters and failure patterns have been presented [36]. For instance, [PERSON] et al. [37] carried out uniaxial coupled statics and dynamics tests and acquired rock burst tendency of coal, the AE parameters, the failure mode and the fracture morphology. [PERSON] et al. [38] conducted tests on coal specimens under different medium strain rates and proposed an empirical relationship between the peak strength and the strain rate; they also found that the evolution and distribution of stress and deformation were affected by the heterogeneity of the specimens. [PERSON] et al. [39] systematically studied the failure process, fracture characteristics, and failure micro-mechanism of rock at low and medium strain rates for \(10^{-5}\)-\(10^{-1}\) s\({}^{-1}\), and a good correlation between the failure and strain rates had been found.