Development and Application of Fluid-Solid Coupling Similar Materials in Discharge Test of Old Goaf Water

Table 4

Test results of brittleness characteristics of some similar materials.

Group no.	Elastic modulus	Weakening modulus
	Prepeak (MPa)	After peak (MPa)
1	42	20	2.1
2	68	31	2.2
3	94	36	2.6
4	96	34	2.8
5	123	49.2	2.5