Jinshandian Iron Ore Deep Filling Stope Structure Parameters And Mining Sequence Optimization Research

With the depletion of shallow resources，Jinshandian iron mine has entered theperiod of deep exploiting and along with the increasing depth,ground stress the degreeof local ore crushing,ground pressure and also will become complicated,which results inlots of deep mining safety hazards.In order to improve personnel’s safety in when theyare in deep mining of iron ore,it is necessary to analyze laws of deep mining groundpressure activities and controlling technology in Jinshandian iron mine.Based on the engineering geological survey of Jinshandian,a detailedunderstanding of mined-out area. Currently, the underground pressure of Jinshandianmainly appeared was roof fall、rib spalling and various forms of support for roofdamage.In addition,as mining depth increases, extent and scope of the damage byground pressure will gradually expand;through three-dimensional numerical calculationand analysis by ANSYS,ground pressure activities laws of Jinshandian Iron was studiedwhen it is backfilled,the results show that during the deep ore mining process, thecompressive stress on the entire of the level ore body is gradually ower from east towest, but the magnitude is very small,and part of the compressive strength is beyondUltimate strength of the orebody which is mainly showed in the East of the orebody,being perpendicular to the second orebody.Man Gob and loose body is the mainreason of pressure change for deep East and West of Jinshandian Iron.AccordingJinshandian Iron deep pressure distribution characteristics,the factors that influence thestability of stope was analyzed,also parameters optimization program of the stope wasdesigned by using orthogonal experiment method, and through numerical analysis andpoor structural parameters of deep mining field being optimized,the stability of thestope mining was improved in the paper;Through the research above and technical solutions,behaviors of the deep pressurein Jinshandian Iron was controlled effectively to improve the safety of mining,it mayapplied to homogeneous Iron to a certain extent.