煤矿立井提升钢井架设计优化研究OA

The mining depth of domestic coal mines continues to increase,and the production scale of single wells continues to expand.The design height of the headframe has been raised,the hoisting container was increased,and the functions have become increasingly complex.With the popularization of large-diameter wellbore freezing method construction,the difficulty of foundation design is intensified by the freeze-thaw characteristics of collapsible loess and soft rock foundation,and the geological conditions faced by headframe site selection have become increasingly complex.Aiming at the headframe design requirements under the conditions of high hoisting load,high hoisting height and complex foundation,taking the No.2 air intake vertical shaft headframe of Hujiahe Coal Mine as the engineering basis,design research on double diagonal braced steel headframe structures is carried out.By comparing the advantages and disadvantages of different support schemes,a reasonable support method is determined;The influence of materials on various indicators of the headframe is analyzed,and suitable materials are selected;Combined with the special foundation conditions of the engineering,a targeted foundation treatment method is determined,which provides a technical reference for the design of large-scale steel headframe structures under similar complex geological conditions.