Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal-Rock Composite under Uniaxial Load

Table 3

Destruction characteristics of combined samples.

Sample number	Destructive cracking location	Acoustic characteristics	Shape	Ejection speed	Rock dust distribution
C-1	Coal	Slight noise	Fragmented	Faster	Large amount, in equipment head
C-2	Coal	Slight noise	Fragmented	Faster	Large amount, in equipment head
C-3	Coal	Slight noise	Fragmented	Faster	Large amount, in equipment head
D-1	Coal	Crisp noise	Flake and block	Extremely fast	Large amount, in equipment head
D-2	Coal	Crisp noise	Flake and block	Extremely fast	Large amount, in equipment head
D-3	Coal	Crisp noise	Flake and block	Extremely fast	Large amount, in equipment head
E-1	Coal	Burst noise	Flake and block	Extremely fast	Less amount, inside the device head
E-2	Coal	Burst noise	Flake and block	Extremely fast	Less amount, inside the device head
E-3	Coal	Burst noise	Flake and block	Extremely fast	Less amount, inside the device head