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Ứng dụng máy kinh vĩ con quay trong công tác đo chuyền phương vị cho lưới khống chế toạ độ phẳng mỏ than Núi Béo

Bài viết trình bày kết quả ứng dụng máy kinh vĩ con quay GYRO X II trong công tác đo liên hệ mặt bằng qua giếng đứng xuống hầm lò tại mức -140 m và -350 m ở mỏ than Núi Béo nhằm nâng cao độ chính xác đo chuyền phương vị cạnh đầu tiên của mạng lưới khống chế cơ sở dưới hầm lò, giảm thời gian, công sức và nâng cao mức độ an toàn lao động. | Journal of Mining and Earth Sciences Vol. 63 Issue 1 2022 73 - 80 73 Application of gyrotheodolites in the determination of bearings for the hozirontal control network of Nui Beo underground coal mine Dung Ngoc Vo 1 Canh Van Le 1 Dung Tien Nguyen 2 Tu Anh Nguyen 3 1 Faculty of Geomatics and Land Administration Hanoi University of Mining and Geology Vietnam 2 Vinacomin Nuibeo Coal Joint Stock Company Vietnam 3 Vinacomin Vietbac Mining Industry Holding Vietnam ARTICLE INFO ABSTRACT Article history In Vietnam coal mines are exploited deeper and deeper and the method Received 25th Oct. 2021 of seams opening using with mine shafts has been increasingly popular. Accepted 09th Jan. 2022 For mine surveying there are several methods of conveying the bearing Available online 28th Feb. 2022 to the tunnels depending on the number of mine shafts the depth and the Keywords cross-section of the shaft and the available surveyring equipment of the Gyrotheodolites mine. Each method has its advantages and disadvantages and different Mine orientation application conditions. It has been proved that the method of conveying the bearing to the tunnels or underground orientation by traditional Nui Beo coal mine methods gives low accuracy requires a lot of time and effort and no Underground control network. assurance of accuracy. The method using a gyrotheodolite has the advantages of reducing time and effort and improving the level of safety. Therefore the application of surveying gyro is considered as an effective alternative in this work. The paper presents the results of the application of a GYRO X II gyrotheodolite in determining bearings at -140 m and -350 m of the Nui Beo coal mine in order to improve orientation accuracy. The resulting bearings of the first lines of the 2-level underground traversing control networks were used to determine control points at the -140 m level and the -350 m level. The results proved the accuracy of the method with the biggest azimuth error of 9.23 .