Nghiên cứu sự ổn định của lò dọc vỉa tái sử dụng tại mỏ than Khe Chàm I

Các sự cố biến dạng và phương pháp chống giữ, duy trì ổn định lò chuẩn bị luôn là những vấn đề quan trọng trong quá trình khai thác than và sản xuất an toàn, đặc biệt đối với các đường lò nằm trong điều kiện địa chất phức tạp. Để xác định nguyên nhân và hướng khắc phục các nhược điểm trong công tác chống giữ và duy trì ổn định lò chuẩn bị tái sử dụng, một nghiên cứu điển hình tại vỉa 11, mỏ than Khe Chàm I, đã được trình bày trong bài viết này. | Journal of Mining and Earth Sciences Vol. 62 Issue 5a 2021 94 - 102 94 Research on the stability of reused roadways at Khe Cham I coal mine Phuc Quang Le 1 Duy Van Than 2 1 Faculty of Geoscience and Geoengineering Hanoi University of Mining and Geology Vietnam 2 Institute of Mining Science and Technology - Vinacomin Vietnam ARTICLE INFO ABSTRACT Article history The deformation and supporting methods maintaining roadways Received 4th Apr. 2021 stability are always important issues in coal mining and safe production Accepted 26th Sept. 2021 especially for roadways in complex geological conditions. To identify the Available online 1st Dec. 2021 cause and direction to overcome the disadvantages of supporting and Keywords maintaining the stability of reused roads a case study at seam 11 Khe Coal pillar Cham coal mine I is presented in this paper. Here coal seams are Deformation roadways exploited with a longwall system and the roadway is reused with the function of transport and ventilation when mining adjacent panels. In the Mining pressure reuse phase between the roadway and the goaf is a 20m wide coal pillar Roadway and the main roof of the seam is a hard roof stratum. Based on the results Support quot SVP quot . of the detailed field survey the deformation characteristics of the road and the damaged types of the supporting structure were investigated. The study results show that there is serious deformation and because SVP steel resistance cannot control the movement of the surrounding rock mass and ensure roadway stability. The deformation and narrowing of the roadway section have negatively affected the transportation and ventilation and labor safety. In addition roadway repair and reinforcement must be carried out regularly leading to an increase in workload and production costs by times. To limit the deformation of re-used roadways the development directions of the supporting structure have been recommended. The research results of the paper can provide .