- LIU Gui jian 1,PENG Zi cheng 1,YANG Ping yue 1,WANG Gui liang 2,ZHANG Wei 3 (1.Department of Earth and Space Science,University of Science and Technology of China,Hefei 230026; 2.Faculty of Resource and Environmental Science,China University of
Based on the genetic analysis of trace elements in the coal of Yanzhou mining district and the summary of previous conclusions,the concentration processes of trace elements are divided into three stages,i.e.primary,secondary and hysterogenic stages.The main factors,which impact on concentration and migration of trace elements,are analyzed.The results indicated that during the coal formation,which began from plants growing to peat swamp and to types of coal rank,there are many factors influencing migration and concentration of trace elements.The factors mainly include plant types,chemical conditions,climate conditions,seawater encroachment,magma hydrothermalism during coalification,and matter exchange between coal and rocks of roof and floor.Therefore,the generation and concentration of trace elements in coals are controlled by many geological factors during every coalification stages.
2001 04 [Abstract][OnlineView][Download 169K] - AI Tian jie,HOU Hui min (China University of Ming and Technology,Beijing 100083,China) ZHENG Mei rong (Steal Research Institute of Xuanhua Steal Corporation,Xuanhua 075100,China)
The maceral,fluorescence and R r of original coals for coking in Coking Factory of Xuanhua Steal Corporation were measured by means of coal petrology,while the small coking stove experiment of 10 kg was carried out.The study results show that the No.27 coal can be used independently or partially matched with other coal.Of the mechanical intensity of part coke M 25 can be up to 85% and M 10 can be to 10.2%.
2001 04 [Abstract][OnlineView][Download 246K] - JIANG Jun,CHENG Jian guang (Shandong University of Science and Technology,Shandong Prov.,Taian 271019,China)
The negative effects on economy,society and environment while coal mine resource were exploited are discussed through the example of pollution and destroy on environment caused by coal resource development in Xinwen Mine,Shandong Province.The correlation between ecological recovery and sustainable development of coal mine is also discussed.
2001 04 [Abstract][OnlineView][Download 125K] - CHENG Hong chun (Xingji Energy Inc.,Anhui Pro.,Huainan 232171,China)
Based on mining geological conditions of Balitang coal mine,the exploration for mine construction is conducted with comprehensive methods combined geophysical exploration,drilling and roadway exploration to meet the need for high speed and low costly providing useful data for mine construction.The result shows that the comprehensive exploration for pitching concealed coalfiedld is useful.
2001 04 [Abstract][OnlineView][Download 121K] - QU Yong hua,JIAO Si hong,ZENG Yong,JIANG Zhen quan (Institute of Resource and environment,China University of Mining & Technology,Xuzhou 221008,China)
It is introduced that a secondary developing technique to AutoCAD employing Object Oriented Programming and using Visual Basic 6.0,and its application to mine resource evaluation system.As a result,the evaluation system can draw parametric coal pillar and label the drill data automatically.The application result shows that in the environment of VB,using the graphic function of AutoCAD,this method can shorten the developing period greatly.
2001 04 [Abstract][OnlineView][Download 249K] - FAN Jing kun (Huaibei Mining Group of Companies,Huaibei 235006,China)
It is studied that a kaolinite bed located between No.5 and No.6 coal seams at the bottom of Xiashihezi Formation in Zhahe mining area,Huaibei,by means of differential thermal analysis,X ray diffractogram,infrared spectroscopic analysis.The study results show that this kaolinite bed consists of roughly pure kaolinite mineral ores with average depth of 3.8 m,in which the content of Al 2O 3 is generally 36% 39%,but Fe 2O 3 is 0.78% 1.71%,TiO 2 is 0.49% 0.97%.It is proved that this kind of kaolinite can be favorably used for making chemical products and calcining kaoline.
2001 04 [Abstract][OnlineView][Download 225K] - ZHANG Ji lin,WEI Dong,CAI Feng guang (Ventilation Department of Yangquan Coal Mining Inc.,Yangquan 045000,China)
Based on gas occurrence characteristics in Yangquan coal mining area,an extraction method with economic and technique feasibility is determined through correlation analysis of every kind of gas extraction indexes.It means that for single mining coal seam the optimum selection and development direction are U+L ventilation and large hole gas extraction;for combined mining working face of 15 # coal seam the U type ventilation and the gas extraction from roof strike direction rock road way are relatively better.
2001 04 [Abstract][OnlineView][Download 128K] - YANG Yong guo,QIN Yong,ZHANG Dong ming (College of Mineral Resource and Geological Science,China University of Mning & Technology,Xuzhou 221008,China)
An index system of hierarchy is established based on the characteristic researching of economic evaluation in coalbed methane projects.Using the analytic hierarchy process,the judgement matrix between general objective and each hierarchy is determined and the corresponding weight on the ecnomic evaluation is calculated.The results show that the judgement matrix is consistency,and it would provide foundation for evaluation of coalbed methane project.
2001 04 [Abstract][OnlineView][Download 130K] - SONG Sheng yin (Xi′an Branch,China Coal Research Institute,Xi′an Shaanxi 710054,China)
Based on drilling and cementing technology used for 1 test well and 3 producing wells in Xinji coalbed methane pilot pattern,it is put forward that a set of advanced technolgy about drilling,reservoir damage prevention,wireline coring and low density cementing for CBM well.In addition,a set of academic base and practical method for China′s CBM exploration and development in future.
2001 04 [Abstract][OnlineView][Download 117K] - ZHONG Ling wen (Xi′an Branch of CCRI,Xian 710054,China)
The law that the adsorption values available for coal Langmuir isotherm testing isn′t constant but variable under the same testing conditions occasionally was discovered by the author at studying coal absorption capacity.The experiment result indicates different maximum pressures used in the testing cause the variation of absorption value.The research result further reveals that the relation between absorption constant V L & p L and maximum testing pressures is positive linear trend,and this law identified is of universal based on a lot of absorption data of coal samples from several main coalfields of China.In order to show the correlation among absorption constants and make full use of the data and information collected from the past experiments,a special method transferring absorption estimates under different maximum testing pressures to same maximum pressures is established in the testing study.
2001 04 [Abstract][OnlineView][Download 254K] - ZHAO ZHi gen,TANG Xui yi (Huainan Institute of Technology,Huainan 232001,China) ZHANG Guang ming (Mengzhuang mine of Huaibei Mining Administration,Huaibei 235058,China)
The results are reported about isothermal adsorption experiment on 3 samples under 30℃,50℃,70℃ temperature.It is concluded that the maximum adsorption capacity is correlated to temperature,depending on that the adsorption volume of coalbed methane in deep depth can be predicted.
2001 04 [Abstract][OnlineView][Download 135K] - LI Tian zhong 1,ZHANG You sheng 2,QIN Yong 1 (1.China University of Mining & Technology,Xuzhou 221008,China;2.China University of Petroleum,Beijing 100830,China)
Analyses of secondary hydrocarbon generation in sapropelic coal and its residue from pyrolitic simulation are resulted in two conclusions:(1)While secondary hydrocarbon generation begins,the phenomena of blue shift takes place,it marks the start of secondary hydrocarbon generation;(2)the location (marked with the maturity of vitrinite) and strength of the phenomena generating have affinity with original maturity,with original maturity increasing,the location gradually moves back;the difference between generating maturity and original maturity will increase at first and then decrease,the turning point is suggested in the range of 1.46%～1.80% (R o,max ).
2001 04 [Abstract][OnlineView][Download 322K] - HOU Shi ning,DAI Lei,ZHANG Kai,LI Xin (Yongcheng Coal & Electricity Group Co.ltd,Yongcheng 476600,China)
According to the fact that water bursting catastrophes have happened frequently since 1991 when the mine was constructed,by means of theories of geological structure and coal mine underground pressure inquires into cause of water bursting in Chensilou Coal Mine,writers think that the factors of special structural characteristics and structural reactivation,etc cause water bursting in coal mine.
2001 04 [Abstract][OnlineView][Download 208K] - YANG Tian hong 1,LIU Hong yuan 1,TANG Chun an 1,SHEN LI 2 (1 North east University,Shenyang 110006,China;2 Fushun Branch,CCRI,Fushun 113001,China)
Seepage flow numeration is an effective tool for simulation,dynamic analysis,effect evaluation and forecast of drainage process in rockmass.The dynamic process of the roadway drainage in the side slope is simulated by using boundary element numerical method.Results show that seepage flow coefficient tensor and drainage porosity of rockmass have an obvious effect on the drainage and the dynamic process,as well as the boundary element numerical method is effective on the drainage simulation of small section in size.
2001 04 [Abstract][OnlineView][Download 268K] - YU Qing yang 1,ZHAN Jun 1,YU Ying bo 2 (1 Jilin University,Changchun 130026,China; 2 Changchun Construction Project Quality Supervising Station,Changchun 130026,China)
On the basis of analyzing character of shear strength of clay,this paper gives a theory that we can use discount coefficient to deal with shear strength aiming at its obtain problem of designing construction foundation pit bracing.Then an example of its appliance is given on super consolidated clay of Changchun City.
2001 04 [Abstract][OnlineView][Download 141K] - JIN Xiao guang 1,WANG Lan sheng 2,LI Xiao hong 1 (1.Key Laboratory of South West Resourse Development and Environment Hazard Control Engineering of MOE,Chongqing University,Chongqing 400044,China; 2.Chengdu University of Technology,Chengdu 6100
With underground engineering excavated,geo stress released and being regulated,surrounding rock quadratic stress field was formed.The distribution and magnitude of quadratic stress field relates to engineering geological condition and it affects safety construct and supporting measures directly.Quadratic stress field of surrounding rock was measured in site by using suitable for measuring and improved stress restoring method,combined numerical modeling,the variability features of surrounding rock quadratic stress field along the tunnel axis and cross section were researched in this paper.The dependence between surrounding rocks quadratic stress and geo stress field,surrounding rock class,fracture tectonic,epigenetic surface formation,the state of underground water and construction,was analyzed.It has submitted data to research of quadratic stress field in underground engineering and information immediately to information construction in tunnel.
2001 04 [Abstract][OnlineView][Download 138K] - CHEN Jiang feng 1,LIU Yong 1,ZHANG Guo wang 2 (1 Jiaozuo Institute of Technology, Jiaozuo 454000,China;2 Pingdingshan Mining Co,Ltd,Pingdingshan 467000,China)
Fractal dimension of natural water system ,to some extents,could reflect geological structure and crustal movement behaviour in the areas.Whereas,a method of calculating fractal dimension is carried out by artificial now.In this paper,based on Visual Basic programming,a computer processing and fractal dimension calculation of natural water system has been carried out by computer technique.As an example,the fractal dimensions of three water systems and their main channels in China (Yellow River,Yangzi River and Pearl River)are calculated by using this program.This computing method is fast,accurate and applicable to various lineaments.
2001 04 [Abstract][OnlineView][Download 289K] - WU Hui fang 1,DUAN Shui yun 1,GAO Hong sen 2 (1 229 Hydrogeological Team of China National Administration of Geology,Taiyun 030006,China; 2 Wangzhuang Coal Mine,Luan Mining Co,Ltd.Changzhi 046031,China)
Dongshan Coalfield is located in the western part of Niangziguan Spring Area.Ordovician karst water threatens mining No.15 coal seam safely.The possibility of karst water gushing is existed in weakness zone of water resisting coal block and fractured zone of collapse columns.This paper deals mainly with the condition of water gushing from coal seam floor and advances the control measure.
2001 04 [Abstract][OnlineView][Download 126K] - HUO Quan ming 1,CHENG Zeng qing 2,FU Jin sheng 2,GOU Jing wei 2 (1.China University of Mining Technology,Beijing 100083,China;2.Research Institute of Coal Geophysics Exploration of China Administration of Coal Geology,Zhuozhou 072750,China)
Through the research on mathematical model,physical model and real data of the dissemination rule and motion form of transverse wave,it is founded that transverse wave has the same characteristic in three dimensional wave field of longitudinal wave.In the light of this feature,field observation on three dimensional transverse wave can be done.A great deal of practical data show that,using the data of three dimensional transverse wave can explain the cavity and ancient lane,buried at the depth of 5～40 m and can stratify precisely the layers simultaneously.
2001 04 [Abstract][OnlineView][Download 199K] - HAN Wan lin 1,ZHANG You di 2,LI Nai liang 2 (1 Tongji University,Shanghai 200092,China; 2 College of Energy Resources Science and Engineering,CUMT,Xuzhou 221008,China)
Five seismic parameters such as amplitude of wave crest and hollow(A1),average frequency(Fa),energy in dominant frequency domain(Qf1),energy in low frequency domain(Qf),peak frequency(Fmain) are derived according to the seismic kinematics and dynamic characteristics of coal layer thickness.Eight groups of studying samples,made use of BP(Back Propagation)neural network of four layers improved by adopting momentum algorithm and self adaptive adjusting learning rate algorithm to train the BP neural network,and used the trained BP network to forecast coal layer thickness.It was proved that forecasting coal layer thickness by BP neural network from multiple seismic parameters had high accuracy by the practical data.and is an effective approach for forecasting coal layer thickness.
2001 04 [Abstract][OnlineView][Download 230K] - WANG Qi (Geology and Geodesy Division,Huaibei Mining Bureau,Huaibei 235006,China)
The field data of four working panels are processed by particular algorithms of tomography.The feasibility?resolving power?stability and antinoise power of algorithms are also tested by processing result.
2001 04 [Abstract][OnlineView][Download 286K] - HU Chao,LI Ju long (China University of Mining and Technology,Xuzhou 221008,China)
Based on the beaker mixed experiment on the treatment of the coagulant for drilling waste mud,we search for a perfect coagulant,through three factors research,which are the pH range?the effect of coagulation and sedimentation rate,then we analyze the main factor which influences the coagulant performance,consequently we gain the best dosge of the coagulant.
2001 04 [Abstract][OnlineView][Download 134K] - LIU Meng xi,LIU Hui,WANG Yan jun (Geology Exploration Institute of Jiangsu Coal Field Geology Bureau,Xuzhou 221006,China)
The exploration quality is greatly influenced by the quality of coal core sampling.It is introduced that a kind of core sampler for deep holes at the depth of 500-1000 m,with the sampling tate of 90%.
2001 04 [Abstract][OnlineView][Download 284K] 下载本期数据