贵州岩溶水充水矿井涌水量预测探讨     

刘前明 《中国煤田地质》2001,13(2):97-98

贵州绝大多数煤矿井是以岩溶水充水为主，矿井排水量与大气降水密切，地面塌陷与淹井事故也屡见不鲜，因此矿井涌水量预测是个非常复杂的问题，作者根据在本地工作的多年工作经验，介绍了一种适用的简易的矿井涌水量与突水量计算方法。  相似文献   

姚桥矿地下水化学特征及在矿井水源判别中的意义   总被引：2，自引：0，他引：2  

李明山  程学丰等 《中国煤田地质》2001,13(3):48-49

姚桥矿地下水系统包含四个子系统：新生界孔隙含水层组，煤系砂岩裂隙含水层组，太原群石灰岩溶隙含水层组及奥陶系灰岩岩溶含水层组。通过对这四个子系统水文地球化学特征的系统研究，提出了各子系统所特有的水质模型，并确定出能作为矿井水源判别依据的水溶组分，为矿井防治水提供水化学特征依据。  相似文献   

直流电法在探测老窑采空区的应用   总被引：1，自引：1，他引：1  

曾若云  姚建华 《中国煤田地质》2001,13(4):53-54

在各种工程地质、环境地质中、对地下采空区的探测是地球物理勘探的一项重要内容。文章从物性参数研究、技术方法择方面入手，探讨了直流电法探测老窑采空区的可行性，并以实例介绍了解决该问题所取得的经验。  相似文献   

峰局五矿下组煤带压开采的可行性与建议     

刘唐生  邵爱军 《城市地质》2001,13(1):16-20

峰局五矿是多年开采的老矿。近些年，随着开采深度的不断增加和开采层次的逐渐下移，来自底部岩溶高承压水的威胁日趋严重，实际生产能力逐年下降。下组煤能否开采是关系到矿井生存与发展的大问题。作者根据多年的研究成果和工作实践，就下组煤带压开采的可行性，谈一些看法和建议。  相似文献   

长清井田环境水文地质特征分析与评价     

吴恩江 《中国煤田地质》2001,13(4):45-46

在分析井田环境水文地质特征的基础上，利用浅层地下水的分析测试资料，依据水环境污染综合评价指数方法对浅层地下水环境质量的现状进行了评价。简要阐述了矿区开发对地下水资源可能造成的影响，矿区开发后地下水环境的一些变化趋势及初步预防措施，为将来矿井设计、建设和生产过程中浅层地下水环境的保护和利用提供了参考资料。  相似文献   

全椒县范水洼金矿区控矿构造初步研究   总被引：1，自引：0，他引：1  

侯明金  赵文广  王东运  李勇  杨友进 《安徽地质》2001,11(3):206-214

研究区主要构造活动可分为3期：早期，发育以透入性的剪切劈理为特征的复式褶皱及倒转翼的逆冲剪切减薄拉断作用；中期，伸展作用；后期，脆性的挤压剪切破碎作用。通过详细地质构造剖面测制。建立了区内的主要构造格架：总体为一复式向斜一汪洼向斜，以杨柳岗组中上段为两翼，以琅琊山组为核，二级褶皱总体表现为向斜开阔，背斜紧闭，向南东倒伏的特征；二级褶皱的转折端为主要的控矿容矿构造，矿(化)体主要赋存于复式向斜的核部、背斜转折端。二级褶皱背斜转折端的拉张垮塌破碎角砾岩及翼部特别是近倒转翼的剪切破碎带是最重要的控矿容矿构造。  相似文献   

Controls on the nature and distribution of an alga in coal mine-waste environments and its potential impact on water quality   总被引：2，自引：0，他引：2  

S. S. Brake  H. K. Dannelly  K. A. Connors 《Environmental Geology》2001,40(4-5):458-469

 A dominant non-bacterial microorganism that may strongly impact environmental conditions in acid mine drainage at several Indiana coal mine sites is a single-celled protozoan, Euglena mutabilis. Field data suggest E. mutabilis has high tolerance for elevated total dissolved solids (TDS), to 18 g/l, and acid conditions to pH 1.7. Distribution is restricted to unmixed effluent pH<4.6, with prolific growth between pH 3.0 and 3.5. Additional factors influencing E. mutabilis include preference for areas with lower mineral/colloidal precipitation rates and a stable substrate of iron-rich precipitates. Initial studies indicate that in areas of prolific growth it contributes to oversaturation of dissolved oxygen by up to 200%. The presence of small orange intracellular crystalline-like structures, similar in color to iron oxyhydroxides, suggests that E. mutabilis may be sequestering iron, and possibly other metals. Further work is needed to determine if E. mutabilis contributes to natural mitigation of poor water quality at these and other coal mine sites. Received: 13 January 2000 · Accepted: 2 May 2000  相似文献   

A Special Orogenic-type Rare Earth Element Deposit in Maoniuping, Sichuan, China: Geology and Geochemistry   总被引：8，自引：0，他引：8  

Denghong WANG  Jianmin YANG  Shenghao YAN  Jue XU  Yuchuan CHEN  Guangping PU  Yaonan LUO 《Resource Geology》2001,51(3):177-188

Abstract: The Maoniuping REE deposit is the second largest light rare earth elements deposit in China, explored recently in the northern Jinpingshan Mountains, a Cenozoic intracontinental orogenic belt in southwestern China. It is a vein-type deposit hosted within, and genetically related to, carbonatite-alkalic complex. Field investigation and new geochemical data of the carbonatites from the carbonatite-alkalic complex support an igneous origin for the Maoniuping carbonatites and related REE mineralization. Carbonatite itself carries rare earth elements which were enriched by hydrothermal solution.
It is known that most of the REE deposits related to carbonatite-alkalic complexes were formed in relatively stable tectonic setting such as cratonic or rifting environment. The Maoniuping deposit, however, was formed during the processes of Cenozoic orogeny. Although the Maoniuping deposit is located in the north sector of the Panxi paleo-rift zone, the rift had been closed before early Cenozoic and evolved into an intracontinental orogenic belt, i.e., the Jinpingshan Orogen, which was formed since later Mesozoic to early Cenozoic. Geochronological and geochemical data also prove that the Maoniuping REE deposit was formed in an intracontinental orogenic belt instead of rift system or stationary block.
The Maoniuping REE deposit is similar to the Mountain Pass REE deposit in many respects such as the high contents of bastnaesite and barite, the low content of niobium, and the common occurrence of sulfides. The discovery of the Maoniuping deposit and other REE deposits during the past two decades suggest a good potential for prospecting REE deposits along the alkalic complex belt located on the eastern side of the Qinghai–Xizang–West Sichuan Plateau.  相似文献   

冷水江煤矿塘冲矿井的地质采勘对比分析     

袁正泉 《湖南地质》1992,11(4):318-323

塘冲矿井的大量井巷地质资料与原勘探精查报告对比分析表明,原精查报告内容与实际情况有较大出入,特别是控煤褶皱、断裂,煤层厚度与储量等方面,都存在较大差异,对矿山采矿影响颇大。究其原因,可能是勘查阶段受规范和技术手段等的限制,使原报告精度不够。因此,本文提出改进勘探方法,完善规范,提高勘查精度和加强煤矿生产补充勘探,都显得十分重要。  相似文献   

低沼矿区煤层气体地化特征及其灾害性     

吴俊  卜凡启 《煤田地质与勘探》1992,20(5):21-26

用立体地球化学的观点和方法研究了徐州煤田“低沼矿区”的瓦斯问题可以获得“低沼矿区”煤层气体是以甲烷为主,重烃含量甚低,δ~(13)C_1偏负等特征,并指出:低沼矿区具有相对性的特点,在一定条件下,煤层仍可具一定的气体灾害性。另外,用碳同位素方法还可以判别“煤层气体的活性”,以反映煤层气体和地下水的灾害倾向性。  相似文献