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In order to solve the problem of secondary disaster risk in coal mines affected by earthquake disasters，firstly，typical cases have been investigated and analyzed，and the types and damage characteristics of secondary disasters in coal mines have been summarized. Based on the comprehensive elements of "man-machine-environment-management"，a three-level indicator system for earthquake-induced secondary disaster risk assessment in coal mines has been constructed. Then，the evaluation method of risk level and importance of hidden danger has been proposed. Finally，a coal mine in a city in Hebei Province was used as an example for practical application. The results show that the types of secondary disasters induced by earthquakes in coal mines can be divided into 6 categories according to the disaster-bearing body. The assessment of the possibility of earthquake-induced coal mine secondary disasters mainly considers six aspects: the earthquake disaster level in the area where the coal mine is located，the risk of coal mine secondary disasters，the hazard of coal seam gas occurrence，the hazard of hydrogeological conditions in the mine，the level of fortification of the disaster-bearing body，and the ability to prevent and mitigate disasters. The assessment of the severity of the consequences mainly considers two aspects: the number of casualties and economic losses that may be caused by disasters. The weak links in seismic fortification of coal mines in this city are ventilation system，shaft support system，and drainage system，which should be targeted to improve seismic fortification level.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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