Gujiatai Iron Curtain Grouting And Backfill Mining And Rock Monitoring Analysis And Research

The hydrogeological conditions of Gujiatai iron Valley is extremely complex, is well-known domestic water mining. In order to realize safe mining under water, after years of research and exploration and practice, Gujiatai iron application at home and abroad first orebody in roof limestone curtain grouting blocking water technology, successful management of groundwater, to realize safe mining under water, to create a higher economic benefit and social benefit.The study of summed up the whole process of Gujiatai ore mining, namely the pre flood to form a curtain aquifuge, interim mining method selection and application of late stage of mined out region roof stability of three parts, among the three complementary rely on each other to form a complete system. The author in the mine for more than ten years of water gushing control and mining practice, the innovative research of water gushing control, mining and rock to detect the contents of three parts were proposed new point of view and in practice to be applied, and achieved good effect.In the first part of Gujiatai ore grouting and filling mining situation as the background, in the summary of geological and hydrogeological data based on the analysis of the system, finishing nearly orebody roof limestone curtain grouting water plugging technology in the current implementation of the key steps and technical indicators, and break through the conventional grouting ideas, through the analysis of fault mechanism and the effect of water, creatively put forward the governance faults the necessity and steps of management, the fault treatment of bore network encryption to 5 meters by 5 meters, 50 meters above the drilling depth beyond the orebody, and at the same time in the mining design will be arranged in the column between the location of fault protection fault, minimize the damage is two times of mining the fault caused by the. Through the test of drilling and mining practice, the effect of fault treatment is good, which greatly reduces the risk of water.The second part analyzes the Gujiatai ore selection to stoping with cemented filling, mining under both in grouting hanging curtain, need to protect good curtain layer to ensure mining process is not to cause big impact damage and rock stability is poor, the comprehensive comparison to drift stoping with cemented filling mining is suitable method. In this paper, the characteristics of the filling mining method, the stope layout, structure parameters, extraction steps, paste filling and other processes are summarized. The research and improvement of the filling technology is mainly focused on the improvement of the filling technology.The third part is based on the research of the based remote network real-time security monitoring technology of the GPRS based roof curtain stability, which is based on the cooperation between Qingdao Technological University and Laiwu Mining Co., Ltd., through the analysis of test results and numerical simulation, the conclusion is drawn that the surrounding rock is stable.