Bài viết phân tích hiện trạng vi khí hậu, sự phân bố nhiệt độ khu vực lò chợ, nguyên nhân làm gia tăng nhiệt độ lò chợ và các giải pháp làm mát trong mỏ hầm lò. Từ đó đề xuất giải pháp sử dụng điều hòa không khí để giảm nhiệt độ, cải thiện điều kiện vi khí hậu cho lò chợ CGH L7 mỏ than Mông Dương. | 28 Journal of Mining and Earth Sciences Vol 62 Issue 5a 2021 28 - 35 Solutions to improve microclimate conditions for longwall in Mong Duong coal mine Quang Van Nguyen 1 Tu Ngoc Do 1 Tinh Van Nguyen 2 Mien Van Nguyen 2 Hung Nhu Le 3 1 Faculty of Mining Hanoi University of Mining and Geology Vietnam 2 91 Company - Dong Bac Corporation Vietnam 3 Vietnam Mining Science and Technology Association Vietnam ARTICLE INFO ABSTRACT Article history Microclimate conditions of underground coal mines are important factors Received 28th Mar. 2021 affecting comfortable and safe working conditions for miners. The Accepted 19th May 2021 microclimate depends on the ventilation airflow parameters such as wind Available online 01st Dec. 2021 temperature humidity and wind speed. Currently Mong Duong coal mine Keywords is exploiting -250 m level and preparing for -400 m level. The strata Air conddition temperature is about 320C the heat dissipation from mining equipment Geothermal coal transporting and the mined space has increased the temperature at the CGH L7 longwall of the Mong Duong coal mine. The air temperature of Microclimate the longwall greater than 300C the humidity of 95 100 exceed the Mong Duong mine allowable standard leading to the longwall is closed affecting workers Temperature of coalface. health and labor productivity. Traditionally ventilation method has been used to remove heat to ensure a safe working environment underground. However when the ventilation system cannot provide suitable climatic conditions for underground workers a cooling system is required. Selection of the most suitable cooling method depends on the intensity of the heat to be removed the mining method the location of the high temperature areas. The article analyzes the current state of microclimate the temperature distribution of the longwall the causes of the increase in the temperature of the longwall and the cooling solutions in the underground mine and proposes solutions to use air .
