中新社圣保罗12月27日电 (记者 林春茵)自24日起，热浪侵袭巴西。巴西国家气象研究所对该国东南 部、南部和中西部多个地区发布红色高温预警，警报持续至29日。高温使得给宠物降温的"凉宠"商品在 多地走俏。 当地时间 当地时间12月27日，巴西圣保罗发布红色高温预警，一位物流公司员工在布拉斯商区将宠物清凉用品搬 上卡车。中新社记者 林春茵 摄 12月27日，巴西圣保罗"避暑胜地"伊比拉布埃拉公园录得37摄氏度，市民在烈日下过马路。中新社记者 林春茵 摄 在电商平台上，宠物冰垫、凉感喷雾、降温背心等商品销量可观。在电器卖场，经销商莱安德罗介绍 说，"黑五"和圣诞促销刚过，又迎来酷暑商机，几大品牌的空调都已经售罄。而低矮的摇头风扇、带有 冰水喷雾的可移动空调因对宠物友好，又免去安装费，销路特别好。 因城市热岛效应，里约热内卢州和圣保罗州备受"炙烤"。27日中午，里约西区实测最高气温35.5摄氏 度，体感温度飙升至42摄氏度。海滩上从清晨起便人满为患，不少人打定主意要在沙滩上过夜。巴媒梳 理称，两天来已有1300余人因中暑、昏厥、虚弱和晒伤就医，四天内紧急医疗事件超过2000起。 在圣保罗花园区，一家宠物旅馆坚持开 ...

Core Viewpoint - The company has implemented comprehensive measures to address high-temperature issues in underground mining operations, focusing on system optimization, mechanical cooling, and individual protection to create a safer working environment for employees [1][5][6]. Group 1: System Optimization - The company has optimized the ventilation system by replacing high-power fans and increasing airflow in working areas, raising the airflow in the North Second Return Lane from 10,000 cubic meters per second to approximately 12,000 cubic meters per second [1]. - In April, the company upgraded the drive system of a belt conveyor, replacing the existing system with a permanent magnet variable frequency direct drive motor, resulting in a temperature reduction of about 5 to 6 degrees Celsius in the tunnel [1][3]. Group 2: Mechanical Cooling - The company installed four 30-kilowatt carbon dioxide cross-critical cooling units at the Central District's auxiliary shaft, which blow 10-degree Celsius cool air directly into the shaft, effectively improving the high-temperature environment in underground areas [2]. - The existing cooling system, which was put into operation in 2012, has been enhanced through various upgrades, including power supply systems and water treatment systems, significantly improving operational safety and cooling efficiency [3]. Group 3: Individual Protection - The company has established a rotation system for high-temperature work points, increased rest times for employees, and set up rest chambers in high-temperature areas [5]. - Employees have been provided with cooling vests and other protective equipment, and the company has set up water supply stations to ensure continuous access to drinking water [5][6].