Summary of practice of large scale penetration engineering in Zhangshuanglou Coal Mine
Over the years,the coal mine surveying technology has not changed much,and the Coal Mine Surveying Regulations has not been revised for a long time,which can no longer meet the current needs of mine survey.Systematically summarized six large-scale pen-etration engineering examples in the past 12 years in Zhangshuanglou Coal Mine.With the use of current precision instruments,the"four frame method"measurement process can greatly improve the penetration accuracy.The actual penetration accuracy was significantly higher than the standard specified in the Coal Mine Surveying Regulations.Practice has proved that the"four frame method"has high measurement speed and accuracy,especially the closure accuracy of trigonometric leveling can reach the third class and close to the ac-curacy required by the second class levelling.Providing reference basis or basic support for subsequent regulations revision for practi-tioners in the same industry has high promotion and application value.
large scale coal mine penetrationaccuracy evaluationfour frame measurement processregulations for coal mine surveying
万方数据
维普
