逐渐趋近法在恢复井筒十字中线中的应用

Application of Approach Method in Recovering Cross Line of Shaft

介绍了国投新集二矿在地面测量控制系统和井筒十字中线点被破坏,新建立的地面测量控制系统和原系统存在较大误差的情况下,利用逐渐趋近法成功地恢复了井筒十字中线,各项指标均满足《煤矿测量规程》的要求。

The cross lines of shaft was successfully recovered with approach method in No.2 Xinji Coal Mine when surface survey control system was destroyed and greater errors existed between the newly-established surface survey control system and the original one. All indicators meet the requirements in 'Regulation of Coal Mine Survey' and can be as reference for those coal mining areas having similar problems.Preliminary Discussion on Origin and Prevention of Subsided Column-Preliminary discussion was made on the geological conditions for the cause of formation of karst subsided column from the angle of mine water disaster control, the exposed feature and omen of subsided column were summarized and analyzed, and the forecast method and control measures for it were also put forward.