Discrete Element Simulation of Roadway Stability in an Efflorescent Oxidation Zone

Table 4

Properties of the intact rock mass.

Lithology	RQD	Er (GPa)	Em (GPa)	σr (MPa)	σm (MPa)
Mudstone 1	60	4.6	0.8	15.7	5.0
Gritstone 1	56	10.0	1.4	38.1	10.8
Mudstone 2	35	4.6	0.3	19.1	3.1
Number 9 coal	31	3.2	0.2	11.7	1.7
Mudstone 3	41	4.6	0.5	19.1	3.6
Medium-fine sandstone	70	13.0	3.2	36.3	15.0
Gritstone 2	76	9.0	2.9	36.6	17.8
Mudstone 4	80	4.6	1.7	17.4	9.4
Number 11 coal	82	3.2	1.3	11.7	6.7