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1项目建设1.1建设意义及实施同煤集团位于山西大同,是全国亿吨级动力煤生产企业之一;在其发展成为特大型国有现代化能源集团的同时,煤炭开采中也存在许多难题:1井田范围广、矿井位置分散、地形起伏大,野外测量工作量巨大;2地面沉陷导致大量地面控制点被破坏,精度和数量无法满足测量需求,恢复和维护成本高;3测量系统种类较多,数据统一性和标准性存在较多问题;4地面沉陷、裂缝情况日益增多,且范围较
1 Project Construction 1.1 Construction Significance and Implementation Tongdui Group is located in Datong, Shanxi Province, which is one of the national one hundred million ton thermal coal producers. While it has developed into a large state-owned modern energy group, there are also many problems in coal mining: 1 Minefield A wide range of locations, scattered mine positions, large terrain fluctuations, huge field measurement workload; 2 ground subsidence caused a large number of ground control points are destroyed, the accuracy and quantity can not meet the measurement needs, recovery and maintenance costs; 3 more measurement systems, data There are many problems of unity and standardization; 4 the situation of subsidence and cracks in the ground is increasing day by day,