Experimental Study on Desorption Characteristics of Coalbed Methane under Variable Loading and Temperature in Deep and High Geothermal Mine

Table 2

Mechanical test results.

Confining pressure	Specimen number	Stress at the boundary point of compaction-elastic deformation stage (MPa)	Stress at the boundary point of the elastic-plastic deformation stage (MPa)	Peak stress (MPa)
3 MPa	S-3-1	11.9	28.9	44.1
	S-3-2	12.7	29.8	40.8
	S-3-3	13.8	29.5	41.4
Average		12.8	29.4	42.1
5 MPa	S-5-1	16.7	33.6	57.2
	S-5-2	18.9	36.4	53.6
	S-5-3	17.5	33.8	54.8
Average		17.7	34.6	55.2