Brittleness Index of High-Rank Coal Reservoir and Its Influencing Factors in Mabidong Block, Qinshui Basin, China

Figure 3

Relationship between mechanical parameters and the brittleness index of No. 3 and No. 15 coal: (a, c) No. 3 coal and (b, d) No. 15 coal.

(a)

(b)

(c)

(d)