第3期 徐志峰等：铁闪锌矿在硫酸浸出过程中的电化学行为 271. Electrochemical behavior of marmatite in sulfuric acid leaching XU Zhifeng2),QIU Dingfan,WANG Haibei 1)Faculty of Materials and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000.China 2)Metallurgy and Ecological Engineering School.University of Science and Technology Beijing.Beijing 100083.China 3)Beijing General Research Institute of Mining and Metallurgy.Beijing 100044.China ABSTRACI In order to study the mechanism of the oxidative leaching of marmatite,the slurry of synthetic marmatite was selected as the research object.The electrochemical behavior of marmatite in sulfuric acid leach- ing was investigated by the three-electrode method.The experimental results proved the intermediate product of H2S in the leaching of marmatite.The results also showed that oxygen,element sulfur disperser as well as chlo- ride ions could accelerate the electrochemical oxidation of marmatite in sulfuric acid.The electrochemical oxida- tion of sphalerite was retarded but that of marmatite was promoted with the increase of acidity.Marmatite was much easier to be oxidized through electrochemistry than sphalerite.The electrochemical oxidation of marmatite should not be neglected in the sulfuric acid leaching. KEY WORDS marmatite:sulfuric acid;oxidation;leaching:electrochemical behavior (上接第250页) Controlling of rock burst in chain pillars between hydraulic mining face and drying mining face YAO Jingming,HE Fulian),DOU Linming2),ZHANG Lei),LIU Haitao,LI Zhe) 1)Key Laboratory for High-Efficient Mining and Safety of Metal Mines of Chinese Ministry of Education,University of Science and Technology Bei- jing.Beijing 100083.China 2)Institute of Ming and Safety Engineering.China University of Mining and Technology.Xuhou 221008.China ABSTRACI Rock burst was easily happened at chain pillars between hydraulic mining face and drying mining face.According to the mechanism analysis of rock burst,the cracks in the loaded coal mass under the condition of high-energy unstable development would lead to rock burst happening,and would bring forward controlling principle of rock burst that impel crack in coal mass to develop stably and decease energy storied in unit coal mass by lengthening the unloaded area,for controlling of the rock burst at chain pillar between hydraulic mining face and drying mining face.Under this condition,the preventive measure was increasing the porosity of coal mass and deceasing the circulating channels of gas and air.Based on the principle,the preventive scheme was put for- ward by stage and combining water infusion with grouting.Project practice proved that the scheme was effec- tive. KEY WORDS rock burst;instability;chain pillar;water infusion in coal seamsElectrochemical behavior of marmatite in sulfuric acid leaching XU Zhifeng 1‚2）‚QIU Dingf an 3）‚WA NG Haibei 3） 1） Faculty of Materials and Chemical Engineering‚Jiangxi University of Science and Technology‚Ganzhou341000‚China 2） Metallurgy and Ecological Engineering School‚University of Science and Technology Beijing‚Beijing100083‚China 3） Beijing General Research Institute of Mining and Metallurgy‚Beijing100044‚China ABSTRACT In order to study the mechanism of the oxidative leaching of marmatite‚the slurry of synthetic marmatite was selected as the research object．The electrochemical behavior of marmatite in sulfuric acid leach￾ing was investigated by the three-electrode method．The experimental results proved the intermediate product of H2S in the leaching of marmatite．The results also showed that oxygen‚element sulfur disperser as well as chlo￾ride ions could accelerate the electrochemical oxidation of marmatite in sulfuric acid．The electrochemical oxida￾tion of sphalerite was retarded but that of marmatite was promoted with the increase of acidity．Marmatite was much easier to be oxidized through electrochemistry than sphalerite．The electrochemical oxidation of marmatite should not be neglected in the sulfuric acid leaching． KEY WORDS marmatite；sulfuric acid；oxidation；leaching；electrochemical behavior （上接第250页） Controlling of rock burst in chain pillars between hydraulic mining face and drying mining face Y AO Jingming 1）‚HE Fulian 1）‚DOU L inming 2）‚ZHA NG Lei 1）‚LIU Haitao 1）‚LI Zhe 1） 1） Key Laboratory for High-Efficient Mining and Safety of Metal Mines of Chinese Ministry of Education‚University of Science and Technology Bei￾jing‚Beijing100083‚China 2） Institute of Ming and Safety Engineering‚China University of Mining and Technology‚Xuzhou221008‚China ABSTRACT Rock burst was easily happened at chain pillars between hydraulic mining face and drying mining face．According to the mechanism analysis of rock burst‚the cracks in the loaded coal mass under the condition of high-energy unstable development would lead to rock burst happening‚and would bring forward controlling principle of rock burst that impel crack in coal mass to develop stably and decease energy storied in unit coal mass by lengthening the unloaded area‚for controlling of the rock burst at chain pillar between hydraulic mining face and drying mining face．Under this condition‚the preventive measure was increasing the porosity of coal mass and deceasing the circulating channels of gas and air．Based on the principle‚the preventive scheme was put for￾ward by stage and combining water infusion with grouting．Project practice proved that the scheme was effec￾tive． KEY WORDS rock burst；instability；chain pillar；water infusion in coal seams 第3期 徐志峰等： 铁闪锌矿在硫酸浸出过程中的电化学行为 ·271·