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Author/Source: China Coal News Date: 2009-4-3 -------------------------------------------------------------------------------- Recently, more than 60 experts, including Qian Minggao, an academician of the Chinese Academy of Engineering, gathered in Xingtai, Hebei, to evaluate four projects carried out by Jizhong Energy Group, such as the “Research on Heat Pump Systems for Mine Return Air and Related Technologies”. The experts on the appraisal committee unanimously agreed that these four technological achievements are at the international leading level and hold positive significance for driving scientific and technological progress in the coal industry. “\"Research on Heat Pump Systems and Associated Technologies for Mine Return Air Sources,\" utilizes heat pump systems to convert large amounts of low-temperature thermal energy that cannot be used directly into usable high-temperature thermal energy. According to preliminary estimates, if this technology is rolled out nationwide, based on the country’s annual coal production of 2.55 billion tons in 2007, the heat that can be recovered is equivalent to approximately 24.85 million tons of standard coal. If half of this heat is recovered, it would mean a reduction of 12.425 million tons in coal combustion, resulting in a reduction of 32.3 million tons in carbon dioxide emissions. “The \"integrated technology of groundwater control, treatment, utilization, recharging, and ecological protection\" has solved the water disaster problem at Wutongzhuang Mine of Jizhong Energy Fengfeng Group. Through comprehensive geophysical surveys both above and below ground, the mine has **reduced the likelihood of water inrush, as well as various types of water inrush accidents** ； A subterranean clarification system is used to purify mine water, which is then applied in tasks such as dust control in the mines, thereby achieving \"zero discharge\" of low-quality water sources from the mines. “The \"safe, efficient, and high-yield comprehensive mechanized solid filling coal mining technology\" utilizes gangue and fly ash as filling materials to replace the coal resources beneath buildings, opening up a new approach for the large-scale extraction of coal in areas where coal is situated under buildings, structures, and other obstacles. “The “Intelligent Automatic Shaping, Constant Power Cutting and Positioning Control System for Tunnelling Machines” is a key research project under the **“863” Program**. The intelligent automatic shaping, constant-power cutting, and positioning control system for roadheaders addresses the issues of tight coordination between mining and excavation operations in coal mines, as well as the high labor intensity and low efficiency faced by workers.