Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis

Table 1

Relationship between volumetric joint number and integrity index of rock mass [16].

Volumetric joint number (per cubic metre)	<3	3–10	10–20	20–35	>35
Integrity index	>0.75	0.75–0.55	0.55–0.35	0.35–0.15	<0.15