采掘诱发高势能溃砂灾变机理与防控研究与展望

A review on disaster mechanism of quicksand with a high potential energy due to mining and its prevention and control

  • 摘要: 采掘诱发高势能溃砂是威胁矿山生产和矿工生命安全的重大灾害,其发生机理与防控原理不同于矿井突水和浅部流砂,具有突发性强、蓄能高、破坏力大、防控困难等特点,亟需在以往研究基础上,对高势能溃砂灾变机理和防控原理开展研究。结合矿山深部开采和高强度开采实际,以赋存—形成—运移—预测—防控为主线,采用地质勘查与建模、物质成分和结构测试、野外及井下长期观测、监测预警、透明土离心模型试验、渗水力模型试验、理论研究和数值模拟等方法,围绕矿山采掘诱发高势能溃砂启动与灾变机理、高势能水砂混合流在采动覆岩裂隙带和垮落带中的运移规律、高势能溃砂注浆扩散凝固机理、挡砂墙渗透失稳机理等关键科学问题,重点研究高势能溃砂形成的地质背景、启动判据、灾变机理、运移规律、辨识评价和防控原理等内容,建立高势能溃砂的危险源辨识、预测评价、灾变机理、运移规律、预警救援、治理恢复的系统防灾减灾救灾的溃砂防控理论及关键技术体系。研究结果将为解决我国采掘诱发高势能溃砂、突破高势能溃砂灾害防控的技术瓶颈提供理论支撑。由于工程诱发灾变过程和结果的不确定性,将高势能溃砂防控向深层次、多结构、多维度、多决策的综合防灾减灾体系拓展,是今后矿山重大地质灾害防控的重点方向。

     

    Abstract: Mining-induced quicksand with a high potential energy is one of the major disasters that threaten the pro-duction safety and miners’life. The occurrence,prevention and control are quite different from those of groundwater in-rushes in mines and quicksand in the shallow foundation engineering. Due to its characteristics of strong suddenness, high potential energy,great destructive power and difficult prevention and control,it is urgent to carry out the research on the disaster mechanism and control of underground mine quicksand with a high potential energy based on the previ-ous research. Combining with the deep and high intensive mining,the scientific research on the main process of occur-rence-forming-migration-prediction-prevention and control for quicksand with a high potential energy needs to be com-prehensively analyzed based on the typical engineering case by geological exploration and modeling,composition and structure characterization,field and long-term underground observation,monitoring and early warning,centrifugal modeling and etc. Therefore,the key scientific problems such as the starting and disaster mechanism,the movement of wa-ter and sand mixture flow in the mining-induced fractured and caving overburden,the mechanism of the propagation and gelation of grouting,and the seepage failure of water-sand retention bulkhead need to be comprehensively studied accordingly. Specifically,scientific research should mainly focus on the geological background,starting criteria,move-ment,disaster mechanisms,identification and evaluation,and prevention and control principles for quicksand with high potential energy,which constituted the key technical system of prevention and control for the quicksand with high po-tential energy. The results will provide a theoretical support for solving the technical problems in the prevention and control of water and sand inrush with high potential energy induced by mining. With the uncertainty of the process of engineering inducement and disaster results,the research on the quicksand disaster should be expanded to a compre-hensive prevention and mitigation system with a deep level, multi-structure, multi-dimensional, and multi-decision making process in the future.

     

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