Comprehensive Evaluation On Geological Disaster Of Mined-out Area Of Hukeng Tungsten Ores

Geological disasters of mined-out area occur frequently, It is formed by rib fall, roof fall,water inrush, earthquake, rock burst, ground collapse, ground subside, ground crack, etc. It cancause great damage to personnel safety and property. Therefore, it is important that developing theresearch on factors of the causes of geological disasters of mined-out area and its stressing changesin the work of excavating in rock massIn this paper, based on "mine veins where the mining technological conditions are verycomplicated in Hukeng tungsten ores "research projects, According to the present conditions ofHukeng mine, Access to information with available data of Hukeng mine, and carry out pointloading test, uniaxial compression test and triaxial compression test, adopt the method of fuzzymathematics and numerical simulation to stope and mined-out area with the comprehensiveevaluation of geological disaster, puts forward the opinions and Suggestions to geological disastersmanagement of mined-out area.The main contents are as follows:(1)A geological investigation is made for the geologic status, the geological hydrologicalconditions and of mined-out area Hukeng mine.(2) Carry out point loading test, uniaxial compression test and triaxial compression test, It isproven that the point loading strength and the uniaxial compressive strength to be reliable byverify, it is concluded that the basic parameters of rock mechanics and analyzed and summed upthe test datum, the result of the data can be helpful to numerical simulation.(3)The weights order of the stability of mined-out area is obtained by AHP, in combinationwith fuzzy mathematical evaluation method, the typical25mined-out areas are divided dangerousgradient and rated, the results showed that28%of typical goaf in25mined-out area belongs tograde Ⅲ, the rest belongs to the Ⅳ level.(4) Model and simulate the40middle piece of typical stope under excavation by using CADand numerical simulation software in, and to analyze its stress and displacement.Research and conclusions in this paper have certain guidance and reference meaning togeological disasters management of mined-out area of Hukeng.