基于加测陀螺定向边的井下支导线升级改造

摘要

The underground horizontal control network can only be formed based on the open traverse .As the tradition open traverse precision can ’ t satisfy the allowable value of breakthrough error for major mining breakthrough surveying ,the gyro orientation technology is used to research three scheme of underground upgraded open traverse .First is the scheme of adding a gyro directional edge :the directional edge is added on the last edge of open traverse w hen the total number of edges is not more than 5 ;otherwise ,the directional edge will move up from the last edge to one third of total number of edges . Second is the scheme of adding multiple gyro directional edges :adding 3 ~ 4 gyro directional edges is advisable with equidistance .Last is the scheme of gyro orientation-electronic ranging :it’s only used in the long distance or ultra-high precision of the mine breakthrough surveying .Combinred with the practical calculation ,results show that the open traverse ending positional accuracy of upgraded can be increased by 0.5~1.5 times ,1.6~4.5 times and 3~8 times comparing with tradition open traverse .%井下平面控制测量网只能以基于支导线的形式沿巷道布设，针对矿山重大贯通工程测量所用的支导线精度满足不了贯通允许偏差的情况，采用陀螺定向技术，研究了井下支导线升级改造的3个方案。首先，加测一条陀螺定向边方案，导线总边数不超过5条时，定向边加测在末边上；否则，定向边由末边开始上移至总边数1／3的位置；其次，加测多条陀螺定向边的多节导线方案，以等距离间隔加测3～4条陀螺定向边为宜；最后，陀螺定向—光电测距导线方案，仅在超长距离或超高精度的矿山贯通工程测量中应用。结合实例计算，升级改造的3个方案与原有支导线比较，导线终点点位精度可依次提高0.5～1.5倍，1.6～4.5倍，3～8倍。