Effect of Liquid Nitrogen Cooling and Heating on Mechanical Properties and Acoustic Emission Characteristics of Coal

Table 2

Maximum peak load and load ratio data of untreated and liquid nitrogen cycles in coal 1.

Number of cycles	0.2 F	0.4 F	0.6 F	0.8 F	Maximum peak load ()
Untreated	370.1332	740.2664	1110.3996	1480.5328	1850.666
3	240.0328	480.0656	720.0984	960.1312	1200.164
5	215.5482	431.0964	646.6446	862.1928	1077.741
7	165.7556	331.5112	497.2668	663.0224	828.778
9	164.068	328.136	492.204	656.272	820.34
15	135.7818	271.5636	407.3454	543.1272	678.909