Meishan Iron Ore Deep Rock Mass Mechanics Parameters Inversion And Heading Surrounding Rock Stability Study

Recent years, The rapid development of the national economy, the growing demand forenergy, the output of iron ore resources also increases day by day. According to the mining,many other underground engineering involved in a series of rock mechanics problems also gotmore and more attention. The physical mechanics property of the surrounding rock ofroadway safety and stability has an important effect, how to improve the stability of the rockmass performance become will solve the problem. Thereforce, according to the surroundingrock displacement back analysis and its physical performance and improve the stability of thestudy has a good research significance and engineering practical significance.In this paper, the meishan iron ore underground-420m deep rock mass mechanicsparameter back analysis and the stability of surrounding rock of roadway heading researchaspects in detail. First of all use site monitoring measurement method, in meishan iron ore1#discharge ore line of SL-1section separately adit indoor part deformation measurement andedge bond level convergence measurement, including the sensor selection, stationinstallation,original data collecting and reprocessing a few most of the work; Secondly, in thefield monitoring measurement based on the data of using the golden section method, thedisplacement back analysis, ANSYS finite element simulation methods, the heading ofsurrounding rock elastic midulus E and cohesion of C inversion analysis, and get a reasonableinversion value; Finally, the mechanical parameters in inversion for reference, the stability ofsurrounding rock heading to bolt-shotcrete support for the premise, sets the system shortanchor, and considering whether to set up long bolting, spray concrete support, inverted archsupport, anchor support, inverted arch and anchor support five factors, set up fivereinforcement scheme. This paper studies found that plan5reinforcing effect more apparent,heading the stability of surrounding rock and safety greatly enhanced, the actual constructionto have the cetain reference value.