Nghiên cứu này giới thiệu phương pháp xác định chiều sâu khai thác an toàn cho tập vỉa ở điều kiện địa chất có uốn nếp và khai thác dưới suối. Phương pháp được đề xuất sử dụng là phương pháp vùng tương tự của “Quy phạm bảo vệ công trình và các đối tượng tự nhiên của VNIMI 98” để tính độ sâu khai thác an toàn. Phương pháp được áp dụng cho mỏ Mông Dương, với 3 vỉa 5, 6, 7 có độ sâu lần lượt là H =210, 180, 136 m. Kết quả đã xác định được chiều sâu khai thác an toàn cho các vỉa 5, 6, 7 tương ứng là H5= 240 m, H6 =192 m, H7= 136 m. | 76 Journal of Mining and Earth Sciences Vol. 62 Issue 5 2021 76 - 83 Research on determining the safe mining depth in special geological conditions of Mong Duong coal mine Chung Van Pham 1 Dac Manh Phung 2 Ha Thu Thi Le 1 Trong Gia Nguyen 1 Trung Thanh Ngo 3 Thang Vu Tran 4 1 Faculty of Geomatics and Land Administration Hanoi University of Mining and Geology Vietnam 2 Vietnam Mining Science and Technology Association Vietnam 3 Mining Geology Joint Stock Company - TKV Vietnam 4 Institute of Mining Science and Technology Vietnam ARTICLE INFO ABSTRACT Article history The displacement and deformation of strata due to underground mining Received 14th June 2021 is one of the factors that negatively affect the safety of production Accepted 14th Aug. 2021 activities. The strata displacement and deformation depend on many Available online 31st Oct. 2021 factors such as mining geological conditions safe mining depths and Keywords mining technologies. The determination of the safe depths is important Displacement deformation for calculating the size of safety pillars to minimize mineral loss. To date there have been many studies to determine safe mining depths under Exploitation of seams normal geological conditions. However not much research has been Safety depth conducted to determine safe mining depths with special geological Special geology. conditions such as many folds breaks faults and under water-bearing objects. This research introduces a method to determine the safe mining depths for the reservoir set in special geological conditions with folds and excavating several seams under water bodies. The proposed method employs the principle of the similar geological zone theory to calculate the safe mining depths. The method is applied to the Mong Duong coal mine with three coal seams numbered 5 6 and 7 with the depth of 210 180 and 136 m respectively. The results of mining depths safe obtained H5 240m H6 192m H7 136m respectively. Copyright 2021 Hanoi University of .
