Research Article
Influence of Cyclic Impact Loading and Axial Stress on Dynamic Mechanical Properties of Burst-Prone Coal
Table 2
Analysis of coal specimens through the XRD method.
| Coal source | No. 2 coal seam of Qianqiu mine | No. 7 coal seam of Zhaogezhuang mine |
| Serial number | QQ-1 | QQ-2 | ZGZ-1 | ZGZ-2 | Depth (m) | −1060 | −1060 | −1100 | −1100 | Properties | Burst-prone | Burst-prone | Burst-resistant | Burst-resistant |
| Mineral type and content (%) | Quartz | 1.5 | 0.8 | | Calcite | | | 1.1 | 1.2 | Dolomite | | 1.2 | Siderite | 1.6 | 1.1 | Halite | | | 0.9 | Amorphous | 90.8 | 90.9 | 90.2 | 91.3 |
| Clay mineral content (%) | 6.1 | 6.0 | 7.8 | 7.5 |
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Note: QQ represents Qianqiu mine and ZGZ signifies Zhaogezhuang mine.
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