Abstract
In order to evaluate the surrounding rock stability of deep roadways, the diversity of accident hazard sources in deep coal mining is statistically analyzed. To conduct an effective evaluation, first, the risk analysis of the factors affecting the rock mass accidents is carried out, and the comprehensive safety index system of rock accidents in deep mine roadway is established. Further, combining the theory of hazard sources with the extension method, a matter–element model for the risk assessment of rock mass accidents in deep roadway is established. Finally, the hazard sources for the surrounding rock stability of deep roadway in the E-Zhuang coal mine of Xinwen Ming area are evaluated. The results show that the risk grade of the surrounding rock for deep roadways in E-Zhuang coal mine is “B”, which is generally safe, the human factors and organizational management factors are relatively safe, and some suggestions for improvement are put forward.
Highlights
With the development of mine production in China, the depth of coal mines gradually increased, and the ecological environment developed complex conditions
The destroyed rock mass would cause the instability of surrounding rock and supporting problem, and bring about a series of environmental disasters, such as rock burst, mine roadway roof caving, impact ground pressure, or surface subsidence
There are many factors that affect the stability of surrounding rock, such as technical equipment, operating environment, and operators [17]
Summary
With the development of mine production in China, the depth of coal mines gradually increased, and the ecological environment developed complex conditions. In 2018, nearly 35% of the coal mine safety accidents in China were caused by roof accidents [3] To solve these problems, a comprehensive extension method should be proposed. Public Health 2019, 16, 4752; doi:10.3390/ijerph16234752 www.mdpi.com/journal/ijerph To reduce these environmental disasters in coal mines, the safety assessment of the surrounding rock is important in the process of mine design and construction. Based on the clustering analysis method and the fuzzy equivalence relation, Zhang et al [7] studied the classification scheme of surrounding rock stability of the coal roadway in the Huozhou mining area and proposed the corresponding supporting countermeasures. The application of extension to surrounding rock evaluation is a highly feasible research method, which can effectively solve engineering problems, increase the safety of mining engineering, and reduce accidents. An application example in the E-Zhuang coal mine of China is provided to illustrate the method; the conclusions are drawn
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