The Research For Information Acquisition And Risk Analysis Of Disaster Cavity In Metal Mine

Cavity is one of the most important hazard sources during Safety mining of Underground Resources. Methods such as theoretical analysis, scene monitoring and numerical simulation were used synthetically in the paper. Based on the cavity monitoring system (CMS), combining the research project "the study and application of the cavity monitoring technology", with mining modeling software SURPAC, numerical analysis software MIDAS/GTS and FLAC3D, aiming at the engineering practice of disaster cavity in Dongguashan Copper Mine Da Tuan-shan Ore, the research for information acquisition and risk analysis of disaster cavity in metal mine were carried on. the main contents are as follows:1. The disaster cavities of Datuanshan Ore in Dongguashan copper mine were detected with cavity monitoring system (CMS), and three-dimensional visualization models of cavity were established by software SURPAC on the basis of detected data, and then the relevant information such as cavity volume, exposed area of cavity roof and real boundary were accurately obtained. Finally, the acquisition of disaster cavity in Dongguashan Copper Mine Da Tuan-shan Ore relevant information was achieved accurately and effectively.2. The risk evaluation index system and fuzzy comprehensive evaluation mode of cavities in metal mine were established. Aiming at cavity practical situation of Datuanshan Ore in Dongguashan copper mine, the fuzzy comprehensive evaluation of cavity was conducted, and then the risk ratings of cavity were obtained.3. Based on the CMS, introduce cavity models in SURPAC circumstance into MIDAS/GTS circumstance, where pre-processing models were established, and finally introduce the pre-processing models into software FLAC3D through conversion program. The 3D numerical analysis models can reflect the risk of true form of complicated cavities and can be performed the numerical calculation, Which realized successfully the combination of the powerful modeling functions of MIDAS/GTS and the post-processing capabilities of FLAC3D. Compared the detecting results and numerical analysis results, the reliability of numerical analysis results were verified.4. Based on fuzzy comprehensive evaluation to cavity risk rating and comprehensively considering the cavity surrounding environment, cavity shape, location and other factors, the corresponding treatment schemes were putted forward, which provided the technique support for cavity effective treatment.Using the advanced technology of cavity detection, modeling and numerical simulation software of MIDAS/GTS and FLAC3D and based on the accurate relevant information of cavity, the risk rating analysis was carried out, which provided the support for prevention of disaster caused by cavity, preventing and controlling the heavy, serious accidents, and had the significances in theory and practice.