Table 2 The mix proportions and test results of simulated coal (kg/m3).

From: Study on the pore structure evolution and microscopic seepage characteristics of coal under high pressure air blasting

Mix proportion

Cement

Sand

Gypsum

Water

Perlite

Mica

Foaming agent

100

280

14

43

2

2

0.35

Average value of simulated coal test results

Compressive strength/MPa

Tensile strength/MPa

Density/kg/m3

Poisson’s ratio

Wave velocity/m/s

Porosity

Elastic modulus/GPa

12.82

1.06

1.638

0.26

2152

6.68

2.52

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