Study On The Design Of The High Slope Support Of The Bunker Considering The Function Of The Underground Structure

Due to transportation and environmental requirements,more and more coal companies have started to build large coal storage stations along the railway.These large coal storage sites are usually built according to the terrain,which leads to the formation of large high slope during the excavation of foundation pit,which poses a threat to the site construction and the safety of coal storage bunker structure.It is of great theoretical significance and engineering value to carry out stability evaluation and support design research on the high slope of the bunker to avoid the slope disaster and maintain the safety of the coal storage system.Based on the engineering background of zhugaita coal storage bunker in shenmu county,this paper evaluates the stability of the slope and designs its support by means of theoretical analysis,numerical calculation and on-site monitoring.The main contents are as follows:(1)Based on the analysis and summary of the existing slope stability evaluation methods,the unbalanced thrust method was applied to calculate the stability of the typical section under two working conditions,and it was obtained that the slope stability coefficient was 0.70 under the condition of heavy rain and the stope instability was determined according to the specifications.(2)The characteristics of different slope support methods were compared and analyzed,and the combined support scheme of slope release and bolt(cable)was determined.Based on the safety factor of the slope under different working conditions,the sliding force of the slope is calculated,the supporting parameters of the stope anchor cable are determined,and the supporting structure is checked.(3)Using finite element MIDAS,the numerical model of slope support under two working conditions was established,the stress field and displacement field were analyzed,the influence rule of undergro und structure on slope stability was studied,and the rationality of the support scheme was further verified.(4)According to the actual situation of the project,the slope monitoring scheme is designed and the monitoring results are analyzed.Monitoring results show that the support scheme is safe and reliable.