Study On Evaluation System Of Geological Hazards Of Mines

Mine geological disaster is an main factor affecting the development of mining.Narrow mine geological disasters are the geological disasters occurring underground,including gas,water damage,roof disaster,fire disaster and dust etc.Coalmine suffers most from mine geological disasters among all kinds of mines and there are much more varieties of coalmine geological disasters,occurring frequently,distributing widely,making more losses.It's helpful for improving coal mine production safety that the disasters are known exactly and the impact of disasters can be accessed properly.That also can provide scientific basis for prevention and control of geological disasters in coal mines.At present,the study of geological disastersin in literature are limited in landslides,mudslides,and a relatively mature theoretical system is formed.Mine geological disasters usually hide underground,making it extremely difficult to study.So there are little studies for mine geological disasters.Studies for mine geological disasters are still staying in the qualitative understanding stage.A series of modern technologies haven't been applied to mine geological disasters quantitative evaluation,such as integration of modern information technology and mathematical theory of nonlinear analysis method.The type of mine geological disaster may be same,but in different mines,their impact on mine production safety can be completely different.It is based on the census of hidden geological hazard factor in Handan-Xingtai area,that this paper analyzes and summarizes the factors affecting the mine geological disasters.Through the expert survey method,basing on expertise and the mine actual situation,factors influencing mine geological disasters are found,including: Ordovician limestone water pressure,thickness of impermeable layer,water-rich property,fault,collapse column,poorly closed drilling,coal metamorphism and lithological features.The modern theory of nonlinear mathematics analysis methods-AHP is introduced to the process to determine the weights of various causal factors.Due to water inrush from collapse column has a characteristic of regional,collapse column's number,shape and size can not characterize the danger of water inrush from collapse column in different parts.The mine will be divided into mines with water inrush from collapse column and mines with no water inrush from collapse column,and the weights of various causal factors are calculated respectively.Applying Multi-source information fusion theory and introducing index VI of geological disaster hazard degree,mine geological disaster hazard assessment model is established.Geological disaster hazard degree of Xingdong mine,Shenjiazhuang mine,Xintun mine,Jiulong mine in Handan-Xingtai area are calculated.The results show that mine geological disaster hazard degree can be properly reflected by the master index system,the weight of each factors and mine geological disaster hazard assessment model that are proposed in this paper.