共查询到20条相似文献，搜索用时 15 毫秒
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20001575 Fang Lianyu(No.3 Hydrogeologyand Engineering Geologieal Team,Hebei Bu-reau of Geologieal Exploration,Hengshui,Hebei);Kang Qingpu The Primary Diseus-sion on the ProsPeets of Geothermal Ex-Ploitation in the Eastern Plain of XingtaiCity,Hebei Provinee(Aeta Geoseientia Sini-ea,ISSN 1006一3021,CN 11一3840/P,21(2),2000,p.155一59,一illus·,4 tables) On rhe basis of summarizing the distribu-t ion eharaeteristies of geologieal strueture,strata,georhermo一geologieal models,geother… 相似文献
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9621 19 Wang Feiyu(Perroleum Universlry,Beijing,102200);卜{e Ping CONTRIBUTIONOF ALGAE AND BACTERIA TO THE HU-MIC COAL FORMATION OF TAIYUANFORMATION IN NORTH CHINA(ES.ISSN 1000一2383,CN42一1233/P,20(6),1 995,p.719一722,2 graphs,2 tables,7 ref,w irh English abstraet)962120 Yin Shax一ehun(Departn、ent of Geo-logieal Survey,Minisrry of Geology andM ineral Resourees)THE EVOLUTION OFPEAT BOGS AND IT‘5 MECHANISM(CGE,ISSN 1001一1986,CN61一1… 相似文献
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971344 Dai Shifeng(Beijing GraduateSehool,CUMT,Beijing);Ren Deyi Fluetua-tion of Sea一Level and Division of Cyeles inYanzhou Coalfield,Shandong Provinee(JCUMT,ISSN 1000一1964,CN 32一1 152/TD,26(l),1997,p.43一47,2graphs,1,able,6 ref) Based on the analyses of eyelieity andtextura!fearure of the eoal measure inYanzhou eoalfield,Shandong Provinee,rhispaPer discusses the eharaeteristies of sea一Iev-el ehange and its eontrolling in the eoal一forming proeess,elueidaresthe asymmetriealfe… 相似文献
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20062354 Guo Li (China University of Min- ing &Technology, Beijing 100083, China); Duan Lindi Relationship Between Microlitho- type and Cleat Distribution in Coal Bed (Coal Geology & Exploration, ISSN1001- 1986, CN61-1155/P, 33(5), 2005, p.9- 12, 2 illus., 3 tables, 5 refs.) Key words: microlithotype of coal, cracks The relationship between microlithotype and the distribution of cleat in coal bed is dis- cussed through a case from Hedong coalfield, combining microstratigraphy and sta… 相似文献
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用绳索取心钻具的岩心钻探用绳索取心钻具进行岩心钻探往往会比用常规岩心钻具所获得的钻进效率更高、岩心采取率更高，钻头的费用也低得多。如果钻孔深度增加，或者地层变化得破碎或出现断层时，这种优点就更为突出。 相似文献
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<正>上期刊登了矿产资源评价篇第二节的第一部分矿产资源储量评价的前3个小节,本期继续刊登矿产资源储量评价的最后1个小节。第二节矿产资源宏观评价1矿产资源储量评价1.4资源储量宏观评价的基本内容在矿产资源宏观评价中,资源储量分析是主要的途径与手段,目前各级决策单位都将资源储量分析所获 相似文献
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20071194 Dai Shifeng(Key Laboratory of Coal Resources of China University of Mining and Technology,Ministry of Education,Bei- jing 100083);Ren Deyi Mineralogical Anomalies and Their Influences on Elemen- tal Geochemistry of the Main Workable Coal Beds from the Dafang Coalfield,Guizhou Province,China(Acta Geologica Sinica, ISSN0001-5717,CN11-1951/P,80(4), 2006,p.589-597,1 illus.,4 tables,1 plate,37 refs.,with English abstract) Key words:coal seams,Guizhou Province 相似文献
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20050332 Hu Baolin ( Anhui University of Science and Technology, Huainan, Anhui 232001); Liu Yanxue Characters of Finite Strain of Vitrinite and Application in the Tong’er Coal Mine, Fengfeng Mining Area, Hebei Province (Chinese Journal of Geology,ISSN0563-5020, CN11-1937/P, 39 (2),2004, p. 207 - 213, 7 illus., 1 table, 15refs.) Keywords: vitrinite reflection, finite strainanalysis, Hebei ProvinceThe vitrinite reflectance of coal in theTong’e… 相似文献
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20051487 Cao Chengrun (College of Earth Sciences, Jilin University, Changchun 130061, Jilin, China); Niu Wei Diffusion and Its Influences of Coalbed Methane in Coal Reservoirs (Global Geology, ISSN1004-5589, CN22-1111/P, 23(3), 2004, p. 266-269, 1 illus., 1 table, 8 refs., with English abstract) Key words: coalbed gas20051488 He Zhiping (Education Ministry of China, China University of Mining &Tech- nology, Beijing 100083); Shao Longyi Anal- ysis on Controls of the Coal Accumu… 相似文献
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孔道结构化合物(H3NCH2CH2NH3)3[(VO)4(PO4)2(HPO4)4]的钒氧化态与热稳定性关系研究 总被引：1，自引：0，他引：1
热处理脱除有机模板易导致VPO体系孔道结构化合物结构破坏,从而阻碍此类材料的实际应用。以孔道结构化合物(H3NCH2CH2NH3)3[(VO)4 (PO4 )2 (HPO4 )4 ](简称V2P3 en)为研究对象,利用热分析(DSC TG)、动态原位高温X 射线衍射(XRD)及多功能X 射线光电子能谱(XPS)等方法,研究了该化合物在不同气氛热处理过程中模板脱除及结构演化规律,重点探讨了钒氧化态的变化对结构稳定性的影响。结果表明,加热过程中随着有机模板的分解脱除,形成较强的还原环境,骨架中的部分钒被还原(V4+→V3+),使原有的配位环境([VⅣO5]三角双锥、[VⅣO6]畸变八面体)与钒的氧化态不符而导致结构重组。因此,钒氧化态的变化是影响热稳定性的重要因素之一。 相似文献
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《现代地质》1990,(4)
No.l Application of Cathodolum mene墨conc吕*the Pcrmian-Triassic Boundary Events and Stratlgrapjc Corrda· tioninNorthwcsternHunanProvillce*……………………………………………………………SongZhimin(9) Climatic and Glacio-Eusta口c Control over the R比ent Quattt21arysedlmentatlon In the Northeast Ganges Deep Sea Fan……………………………………………………………………………………… Falg Nlanqlao(22) DeltaicDeposltional Systems in the Middle and Up卜r Members ofLon以an Formation ofCoal… 相似文献
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在陕冶物探水文队科研的基础上,改进和重新设计了4JQ_(7-80)~(4-120)型密闭充水式深井电泵。4JQ4—120型水量1升/秒,扬程120米,4JQ7—80型(水量2升/秒),扬程80米,能满足东北、西北等地区不同小水矿区深水位、大降深,小口径钻孔等情况。结构简单,合理紧凑,体积小;重量仅为空压机的1/15,适用于 相似文献
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We present first principles calculations for the structural properties of α-berlinite (AlPO4) as a function of pressure. The calculations were performed within the local density approximation using ab initio pseudopotentials and a plane-wave basis. We determined the lattice parameters, cohesive energy, and bulk modulus by minimizing
the enthalpy of the solid with respect to lattice parameters. We find good agreement, within ∼2–3% of the experimentally observed
values, for the structural properties as a function of pressure.
Received: 3 January 1997 / Revised, accepted: 16 April 1997 相似文献