###### Abstract  
Rockbursts represent hazardous dynamic disasters for underground coal mines and other underground rock engineering projects. Some bursting liability indices are put forward and applied to identify the likelihood of rock burst occurrence. The classification criteria of the bursting liability indices are proved to be reasonable for coals, but they are still immature for non-coal rocks. Thus, it is uncertain that it is reasonable to use the classification criteria of coal for evaluating the bursting liability of non-coal rocks. Hence, in this study, a large amount of data, such as the basic mechanical parameters, i.e., Poisson's ratio \(\mu\), elastic modulus \(E\), uniaxial compressive strength \(\sigma_{c}\), and uniaxial tensile strength \(\sigma_{t}\), and the bursting liability indices, i.e., elastic strain energy index \(W_{ET}\), bursting energy index \(W_{d}\), dynamic fracture duration time \(DT\), and brittelness index \(B\), of different coals and non-coal rocks were collected in China. Then, the differences of mechanical parameters and rockburst tendency indices between coal and non-coal rocks were studied systematically, and apart from the Poisson's ratio \(\mu\), the other three basic mechanical parameters of coal and non-coal rocks have great differences in data distribution and concentration scope, which proved that the non-coal rocks cannot share the same index system and classification criteria of coals. In addition, the evaluation results of a single index for rock bursting liability of rocks were directly compared in pairs, and the inconsistency rate for coals is about 42-68%. It is necessary to build a comprehensive evaluation method to evaluate the bursting liability of rocks. At last, the modified rockburst tendency classification criteria for non-coal rocks were put forward. It is reasonable to use the classification criteria of the \(W_{ET}\) and \(W_{cf}\) to classify the bursting liability of non-coal rocks, while it is unreasonable to use that of the \(DT\) and \(\sigma_{c}\). It has been concluded that the index \(B\) are more suitable for non-coal rocks, and a new index, named strength decrease rate (SDR), was proposed to determine the bursting liability, which is the ratio of uniaxial compressive strength \(\sigma_{c}\) to duration of dynamic fracture \(DT\). rock burst; coal; non-coal rock; basic mechanical parameter; bursting liability index; classification criterion +
Footnote †: journal:  
0000-0001-9999-22001  
[PERSON], [PERSON], [PERSON], [PERSON], [PERSON], [PERSON]. the strength properties of rocks, and the ratio of the \(\sigma_{c}\) to \(\sigma_{t}\) is called as the brittleness index \(B\) of rocks [9; 10; 11]. The brittleness index \(B\) is often used to indicate a significant bursting liability index for non-coal rocks [12]. Poisson's ratio \(\mu\) and elastic modulus \(E\) express the deformation capacity of rocks [13]. These basic mechanical parameters of rocks influence the occurrence of rockburst in underground engineering. Therefore, many bursting liability indices were put forward based on the lab tests of the basic mechanical parameters [14]. In conclusion, there are more than a dozen indices to evaluate the rock bursting liability of rocks [15]. Four indices, i.e., elastic strain energy index \(W_{ET}\), bursting energy index \(W_{cf}\), duration of dynamic fracture \(DT\), uniaxial compressive strength \(\sigma_{c}\), are the most used indices to evaluate the bursting liability of coals in China, as shown in Figure 1.  
The bursting liability classification criteria of coals are often divided into three bursting liability grades, i.e., heavy bursting liability, weak bursting liability, and no bursting liability. [PERSON] et al. firstly proposed the elastic strain energy storage index \(W_{ET}\) as a bursting liability evaluation index for coals in 1972 [16].