对晋华宫矿870大巷贯通工程的技术分析

针对大型巷道贯通工程,测量精度要求高,测量误差积累大等特点,就如何减小测量误差,提高贯通精度这一问题,以同煤集团晋华宫矿870水平大巷贯通测量为例,讨论了建立地面专用控制网和提高井下导线测量精度的必要性和可行性;通过贯通后的测量成果数据,分析了影响贯通精度的主要误差来源及削弱误差的方法;并对导线边两项投影改正误差的影响和测距三角高程能否代替井下一级水准等问题进行了探讨,并得出结论.提出了提高测量精度的有效方法.

Technology analysis on the 870 laneway transfixion engineering in Jinhuagong Coal mine

In view of the characteristics that the demand of survey precision is high and the accumulation of survey error is big in the large transfixion engineering,on how to decrease the survey error and improve the transfixion survey precision,in this article the authors discuss the necessity and feasibility of establishing special control net and improving traverse survey precision in the 870 level laneway transfixion in Jinhuagong Coal Mine of Datong Mine Group.According to the data obtained from transfixion survey,the main error origin that influences transfixion precision and the method of decreasing errors are analysed;and discuss the effect of two projection correction errors of traverse are discussed,Whether triangulation can replace the first level survey in mine survey is discussed,and conclusions are drawn too.The authors put forward available methods on enhancing survey precision.