Experimental Research on Mechanical Properties of High-Temperature Sandstone with Different Cooling Methods

Table 1

Density.

	Density before heating(g/cm^3)	Average density before heating(g/cm^3)	Density after heating(g/cm^3)	Average density after heating(g/cm^3)	Kρ (%)
C	2.443	2.445	—	—	—
	2.444		—
	2.448		—
N	2.44	2.441	2.403	2.406	1.43
	2.443		2.407
	2.439		2.408
W	2.438	2.439	2.397	2.398	1.68
	2.439		2.398
	2.44		2.4
R	2.442	2.444	2.405	2.407	1.51
	2.445		2.408
	2.445		2.408