Coupling Analysis of Water Injection Softening-Precursor Information Prediction of Coal-Rock Mass Based on Energy Conduction

Table 3

Comparison of shock tendency index criterion of coal samples under different water injection conditions.

Sample state	Dynamic failure time	Shock energy index	Elastic energy index	Uniaxial compressive strength	Results of the comprehensive evaluation
Dry state	926	28.440	1.048	32.040	High
Natural state	818	2.830	1.580	22.848	Mid
Saturated state	1440	2.008	6.135	21.016	Low