Deep Mining Blasting Vibration Hazards Research

This study is based on the blasting vibration monitoring tests in Dongguashan 556 mining sites. Through analysis and research the test results, the law of blasting vibration's affect on the stability of preparatory workings was revealed and the measures for reducing affect of blasting vibration on the preparatory workings' stability were suggested. The blasting vibration on the surface of the architectural influence was studied. Specific research results are as follows:(1) This paper applied gray pertinence method to analyze the relevance of the characteristic parameters of blasting vibration and blasting conditions and provides a theoretical basis for the study of blasting vibration control measures.(2) This paper made use of empirical formula to fit the monitoring data and obtains the blasting vibration attenuation law of Dongguashan medium- deep and deep hole blasting.(3) By using ANSYS/LS-DYNA, this paper simulates the influence of blasting vibration on workings, and arrives at the blast vibration safety criterion through controlling the explosive weight of subordinate blasting to reduce blasting vibration, in accordance with the specific circumstances of Dongguashan Mine and dynamic stress ratio method.(4) By combining the basic theory of rough set and support vector machine, this paper builds a rough set - support vector machine model to predict the destructiveness of blasting vibration to the farmer's house, and predicts the destructiveness of blasting vibration to Dongguashan farmer's house on the surface. According to the prediction effect, the prediction model of rough ret-support vector machine has an effective prediction effect.