Feasibility of a Polymer Foaming Agent as a Grouting Material for Broken Coal Masses

Table 3

Uniaxial compressive test results of raw coal specimens.

Specimen	D (mm)	H (mm)	(MPa)	(MPa)	(MPa)	(MPa)
RC-1	49.7	99.8	10.61	0.55	11.86	0.62
RC-2	49.9	100.1	13.45	1.01
RC-3	49.5	99.7	11.16	0.29
RC-4	49.7	101.2	12.20	0.64

Note: is the uniaxial compressive strength, is the average uniaxial compressive strength, is the residual strength, and is the average residual strength.