Study on instability mechanism and control technology of mine roadway in continued breaking region

In order to study the problems of a large loose scope in the surrounding rock and difficult control during passing through the broken zone of the fault in-400 m main oadwvay of Fanghuang No.1 Mine, site investgation.umerical sinuation si e indusrial test and other methd were appied to the analysis on the mine geological structure background, broken mode,tress field around the broken and displacement feld dstrbution mode.The paper hed tat th surounding rock insabliy of mine-41 m main roatway was a jint function result f a brok en surounding rock in the continuous breaking stoucure zone complicated tesseniromment suport method.mining infuences and others.The numericalslnmulaton was appied to analyze the surounding ock stressdisplacement and plasic zone distriuton law when the roadway passed through the cotinued fauits. Based on the test of th loose and falire scope in th surounding rock.bolt / seel mesh / anchor combined support with u type see losed support and active / passiveconbined suppor technology with grouting reinforcemen af the surounding ock was proposed.The industial est showed that wthin 180 days' observation,the max convergence of the twvo sidewalls and the roof and foor was 70 m and 39 m indiuelly n compaison with te same type roadway with no conbined suppor,the displacement was reduced by about 450 mm the integrated reinfocement efect was ecellent and the combined support technology achieved good technical and economic benefits.