Advances in Civil Engineering / 2020 / Article / Tab 5

Research Article

A Study of the Laws of Abnormal Gas Emissions and the Stability Controls for Coal Mine Walls in Deeply Buried High-Gas Coal Seams

Table 5

Shear strength index under different moisture content conditions.

No.Water content (%)S1 (kPa)S2 (kPa)S3 (kPa)S4 (kPa)Cohesion c (kPa)tanφAngle of internal friction (°)

12.029.35316.05631.56660.4040.2460.1568.889
22.798.96315.00430.59258.0660.4910.1538.699
35.238.37916.17330.86560.4041.1610.1488.430
47.099.54815.97832.73560.5992.1260.1478.368
57.817.33813.36427.87651.3661.2850.1267.204
69.027.98916.75731.17665.0811.7130.1448.194
79.138.68913.83530.78755.7731.6240.1377.790
811.038.57416.56229.61863.5221.8500.1478.340
913.168.76815.39330.59261.9631.3640.1448.205
1013.377.77512.47128.05950.8061.3390.1257.125
1113.478.31112.47129.61853.1781.2770.1317.480
1215.028.96315.58829.81259.2350.4910.1538.699
1315.565.26613.25027.66948.4530.8110.1226.950
1418.837.52913.25027.66954.3870.3820.1357.694

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