Experimental Study on Thermal Damage and Energy Evolution of Sandstone after High Temperature Treatment

Figure 11

Energy evolution curves of sandstone after different temperature and impact pressure.

(a)  MPa, °C

(b)  MPa, °C

(c)  MPa, °C

(d)  MPa, °C

(e)  MPa, °C

(f)  MPa, °C

(g)  MPa, °C

(h)  MPa, °C

(i)  MPa, °C

(j)  MPa, °C

(k)  MPa, °C

(l)  MPa, °C