Vol.28 No.11 冯雅丽等：利用微生物电池研究微生物在矿物表面电子传递过程 。1013。 Study on the electron transport process of microbe on the mineral surface using the microbe fuel cell FENG Yali,LI Haoran2,LIAN Jing,ZHOU Liang?) 1)Civil and Environmental Engireering School Uriversity of Science and Techmlogy Beijing.Beijing 100083.Chim 2)State Key Laboratory of Biochemical Engineering.Institute of Pmces Engineering Chinese Academy of Sciences Beijing 100080 China ABSTRACT The electron transfer process of microbe on the mineral surface was studied by the use of a microbe fuel cell.The results indicate that direct contact plays an important role in the process of reducing Fe(OH)3 with Geobacte metallireducens,and the bio-film absorbed on the mineral surface is a key factor. Bio-film fommation needs a relative long time.It is an important metabolic way to fomm bio-film by cell-ab- sorption on the solid surface.Although mediate AQDS accelerates the reduction rate effectively at the early stage,but its effectiveness is not significant after the cell-absorption.So the microbe cataly sis mineral oxi- dation-reduction reaction is influenced by bio-film.Accelerating the film formation on the mineral surface and keeping its stability are very important for the microbe leaching rate. KEY WORDS mineral surface;microbe;electron transport;bio-film;mediator;microbe fuel cell (上接第1008页) Effect of coal pillar width on the stress distribution law of surrounding rocks in fully mechanized top-coal caving mining face XIE Guangxiang,YANG Ke,CHANGJucai Department of Resource Exploration and Management Engineering.Anhui University of Science and Technobgy.Huainan 232001.China ABSTRACT Coal pillar width and gatew ay locat ion to face result in the differences of stress redistribut ion and rock seam movement and importantly influence gatew ay stability and maintenance.According to the geological and mining technical conditions of the No.1151(3)fully mechanized top-coal caving (FMTC) mining face in Xieqiao Mine and based on the analy sis of numerical simulation and in-situ observation.the stress distribution and it's variation laws were investigated at different coal pillar widths.The results show that not only coal pillars'stress distribut ion laws but also coal entities'stress distribution laws are different with coal pillar width,and both stress distributions are displaced.The maintenance situation of gatew ay was detemined on the stress distributions of coal entity and coal pillar,and the appropriate width of coal pillar is less than the critical displacing stresswidth. KEY WORDS coal mining;fully mechanized top-coal caving mining face;surrounding rocks;gatew ay; coal pillar w idth;stress dist ribution (C)1994-2019 China Academic Journal Electronic Publishing House.All rights reserved.http://www.cnki.netS tudy on the electron transport process of microbe on the mineral surface using the microbe fuel cell FENG Y ali 1), LI Haoran 2), LIAN Jing 1), ZHOU Liang 2) 1)Civil and Environment al Engineering S chool, Uni versit y of Science and Tech nology Beijing , Beijing 100083 , C hina 2)St at e Key Laborat ory of Biochemical Engineering , Institute of Process Engineering , Chinese Academy of Sciences, Beijing 100080, China ABSTRACT The electron transfer process of microbe on the mineral surface w as studied by the use of a microbe fuel cell .The results indicate that direct contact plays an impo rtant role in the process of reducing Fe(OH)3 w ith Geobacte metallireducens, and the bio-film absorbed on the mineral surface is a key factor. Bio-film fo rmation needs a relative long time .It is an important metabolic w ay to form bio-film by cell-ab￾sorption on the solid surface.Although mediate AQDS accelerates the reduction rate effectively at the early stage , but its effectiveness is not sig nificant after the cell-absorption .So the microbe cataly sis mineral o xi￾dation-reduction reaction is influenced by bio-film .Accelerating the film formation on the mineral surface and keeping its stability are very important fo r the microbe leaching rate . KEY WORDS mineral surface ;microbe ;electron transport ;bio-film ;mediato r;microbe fuel cell (上接第 1008 页) Effect of coal pillar width on the stress distribution law of surrounding rocks in fully mechanized top-coal caving mining face X IE Guangxiang , Y ANG Ke , CHANGJ ucai Department of Resource Exploration and Management Engineering , Anhui University of S cience and Technology , Huainan 232001 , C hina ABSTRACT Coal pillar w idth and gatew ay location to face result in the differences of stress redistribution and rock seam movement and impo rtantly influence g atew ay stability and maintenance .According to the geological and mining technical conditions of the No .1151(3)fully mechanized top-coal caving (FM TC) mining face in Xieqiao Mine and based on the analy sis of numerical simulation and in-situ observation , the stress distribution and it' s variation laws w ere investig ated at different coal pillar widths.The results show that not only coal pillars' stress distribution law s but also coal entities' stress distribution laws are different w ith coal pillar w idth , and both stress distributions are displaced .The maintenance situation of gatew ay w as determined on the stress distributio ns of coal entity and coal pillar, and the appropriate width of coal pillar is less than the critical displacing stress-w idth . KEY WORDS coal mining ;fully mechanized top-coal caving mining face ;surrounding rocks ;gatew ay ; coal pillar w idth ;stress distribution Vol.28 No.11 冯雅丽等:利用微生物电池研究微生物在矿物表面电子传递过程 · 1013 ·