The Thrush Au Tungsten Ore Pillar Recovery And The Goaf Dealing With Numerical Simulation Studies

With the rapid development of national economy, our country has reached the high-consume stage of mineral resource. Especially the rapid development of mining industry in latest years, there are higher demand for mining technology. The stooping safely and pillar extraction is an emerging problem for our metal mine and directly influences the sustainable development of mine and the safety of personnel.Against this existing state,the paper based on the blowing up of the adjacent rock and gob disposing,regarding Huameiao tungsten stope as research object,through the study of engineering geology and parameter of stope,applying numerical modelling analysed the process of underground stope and the pillar stoping and substep dynamic disposing roof of the gob,at the same time,it gives the whole process a stability analysis step by step and models the caving process of the wall rock.and confirms the figure and field of caving arch of the roof wall rock.The main research works are as follows:1. Investigated the status quo of Tungsten Ore deposit geology and ground pressure,analyzed the ground pressure activities occurred of Gannan tungsten mine in recent years, summarized the reasons of ground pressure activities.2. Analyzed ANSYS solution process of the simulation process and the stability of the evaluation indicators, and assumed the calculations model.3. According to finite element method, to be divided units, and to determine the material properties and boundary conditions, established caving arch model.4. Summarized geological conditions, engineering geological conditions of Hua Mei Ao, haracteristics of mined-out area, the distribution of mined-out area, as well as tested physical and mechanical properties of rock mined-out area.5. Dynamic simulations of the Situ rock stress, the middle block ore mining, pillar extraction, the roof processing of Hua Mei Ao, to verify the caving arch model.