Shock and Vibration / 2019 / Article / Tab 2

Research Article

Analysis of the Occurrence Mechanism for Coal and Gas Outburst Based on Multiple Discriminant Indices

Table 2

Mechanical parameters of coal and rock.

Coal and rockDensity (kg·m−3)Bulk modulus (GPa)Shear modulus (GPa)Internal friction angle (°)Cohesion (MPa)Tensile strength (MPa)

Fine sandstone260037.426.94515.47.8
Limestone265030.416.53814.67.3
Coal141014.86.06252.11.8
Mudstone240023.310.8283.72.8
Sandy mudstone240024.212.5466.84.1
Medium grain sandstone24003421.43613.46.5

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19. Sign up here as a reviewer to help fast-track new submissions.