Advances in Civil Engineering / 2019 / Article / Tab 1

Research Article

Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar

Table 1

Mechanical parameters of coal and rock mass.

Rock stratumDensity (g/cm3)Bulk modulus (GPa)Shear modulus (GPa)Cohesion (MPa)Internal friction angle (°)Thickness (m)

Silt2.659.17.87.2343.5
Fine sand2.713.31010.2374.5
Medium sand2.3412.39.15.23711
#15 coal seam1.352.081.68283
Silt2.659.17.87.2342
Fine sand2.713.31010.2372
Sandy mudstone2.6312.51010351.5
Medium sand2.3412.39.15.2372.5
Coarse sand3.059.910.610.83410
Silt2.659.17.87.2342
Mudstone2.243.26.698.1361
#16 coal seam1.352.081.68285
Fine sand2.713.31010.2378
Silt2.659.17.87.2349

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