Research Article

The Spatio-Temporal Evolution of Overlying Rock Structure and Mine Pressure Behavior in a Short-Distance Coal Seam Face

Table 1

Mechanical parameter of coal and rock and ratio of physical similarity simulation experiment.

Serial numberLithologyCumulative thickness/mSingle layer thickness/mBulk density/(kN·m-3)Strength of extension/MPaElasticity modulus/MPa1 cm ingredients
Coal/kgSand/kgPlaster/kgCalcium carbonate/kg

34Micropsa-mmite640.0026.002.211.561.41508.400.360.84
33Siltstone614.0012.302.450.780.88508.400.240.96
32Conglomerate601.7052.102.643.020.34508.400.500.72
31Medium sandstone549.6052.802.311.121.21408.400.480.72
30Sandstone496.8022.022.350.880.92508.400.500.72
29Medium sandstone474.7828.732.311.121.21408.400.480.72
28Sandy mudstone446.0533.482.540.230.34608.530.210.85
27Kern stone412.5714.702.410.480.81708.530.320.75
26Sandstone397.8723.762.350.880.92508.400.500.72
25Medium sandstone374.1169.112.311.121.21408.400.480.72
24Sandy mudstone305.0016.202.540.230.34608.530.210.85
23Medium sandstone288.805.002.311.121.21408.400.480.72
22Sandstone283.8017.802.350.880.92508.400.500.72
21Kern stone266.0014.602.410.480.81708.530.320.75
20Sandy mudstone251.403.902.540.230.34608.530.210.85
19Kern stone247.5033.002.410.480.81708.530.320.74
18Sandstone214.5013.502.350.880.92508.400.500.72
17Kern stone201.0012.882.410.480.81708.530.320.74
16Sandy mudstone188.1227.182.540.230.34608.530.210.85
15Kern stone160.9412.902.410.480.81708.530.320.75
14Sandy mudstone148.044.622.540.230.34608.530.210.85
13Siltstone143.4221.472.450.780.88508.400.240.96
12Sandy mudstone121.9523.032.540.230.34608.530.210.85
11Siltstone98.927.362.450.780.88508.400.240.96
10Mud rock91.568.742.620.951.32108.530.210.85
9Siltstone82.8211.022.450.780.88508.400.240.96
8Sandstone71.809.072.350.880.92508.400.500.72
7Mud rock62.737.072.620.951.32108.530.210.85
6Sandstone55.6612.162.350.880.92508.400.500.72
5Siltstone43.507.242.450.780.88508.400.240.96
43-2 coal36.264.501.35//4.154.150.210.42
3Siltstone31.767.212.450.780.88508.400.240.96
2Sandstone24.5514.552.350.880.92508.400.500.72
14-2 coal10.0010.001.45//4.154.150.210.42