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岩溶煤矿床防护层的防护效应评价——以邯郸王凤煤矿为例 总被引:2,自引:0,他引:2
煤矿突水现象实际上是防护层煤层底板隔水层水岩相互作用的结果。研究防护层对底板突水的抑制作用,是带水压采煤防止突水及解放水患煤层,特别是解放深部水患煤层的主要研究内容之一。在保护水资源、维护生态平衡的呼声越来越高的今天,大规模疏降煤矿岩溶地下水已经变得越来越不可取。本文在搜集大量实际资料和矿井现场试验、室内模拟试验的基础上,探讨了隔水层的防突机制;扬弃了奥灰底板突水的“下三带”的定性描述,提出了底板突水的新机理;总结出了王凤煤矿安全开采煤层判别式,并指出在无断裂构造的条件下,开采-50水平以上的下三层煤,突水可能性不大。 相似文献
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根据本矿区的地质、水文地质及工程地质资料,确定了矿区9号煤层底板的有效隔水层厚度,并以此计算了9号煤层带压开采的突水系数,对开采受承压水威胁9号煤层的安全区与危险区进行了划分,为西峪煤矿开采提供了资料,对于指导该矿安全生产具有一定的意义. 相似文献
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井陉矿区煤层底板突水综合分析 总被引:3,自引:0,他引:3
井陉煤矿开采80多年来,深受煤系底板岩溶承压水突水之害。其突水规律的探讨将有益于今后矿井安全生产和对突水问题的深入研究。实践证明,这种底板突水是一种多因素的随机矿井水文地质现象。本文拟从综合分析实际资料入手,采用经验统计方法提取有效信息,进而揭示其内在规律,探索突水预测的可能途径,以促进在综合防治条件下,利用隔水层“带压”开采深部煤层的顺利开展。 相似文献
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《中国煤炭地质》2017,(7)
以刘桥一矿Ⅱ666工作面6煤为研究对象,针对矿井断裂构造复杂,与煤层开采关系较大的太原组灰岩岩溶裂隙含水层厚度大、富水性强、水压高、补给源充分、开采深度大、地压高等特点,结合以往相邻采区或工作面深部煤层底板开采时发生多次突水事故的实际,在分析矿井6煤顶底板主要突水点情况的基础上,对Ⅱ666工作面的突水系数进行了计算。结果表明,工作面的最大突水系数超过底板构造破坏带区域突水系数临界值,工作面回采前需采取底板注浆改造措施。根据工作面突水系数、底板隔水层厚度和承受水压大小,把工作面分为2段进行全覆盖注浆改造。运用涌水量对比法、物探探测法和突水系数计算法,对工作面的改造效果进行了评价,结果显示,注浆改造后的钻孔涌水量大幅度减小,甚至为零,物探异常区明显变少,突水系数均0.06MPa/m,达到了预期要求,为保证深部煤炭资源开采系统的正常运行提供了技术保障。 相似文献
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煤层底板突水的计算预测及应用 总被引:3,自引:0,他引:3
在简评现有煤层底板突水预测理论的基础上,提出了老底板模型。参照采场老顶初次来压步距的构成,论述了老底板极限破除步区a的构成,得出了煤层底板穷水与隔水层、含水层自身性质及开采边界条件的关系、最后提出了利用以往突水资料预测同类或相邻工作面突水与否的反演方法,使预测结果更加令人信服。 相似文献
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新阳矿9-10-11号煤层底板低于奥灰岩溶水位,承受水压较高,存在带压开采问题。依据矿区水文地质勘查资料,通过对9-10-11号煤层底板隔水岩层隔水性能、奥灰岩溶水富水程度、底板断裂构造发育情况、煤层底板承压大小以及采煤扰动底板破坏深度等突水因素分析,表明井田西南部断裂构造发育地段为突水危险区。分别采用突水系数法和突水危险度法对全井田9-10-11号煤层底板突水危险性进行评价,评价结果显示井田南部及断裂构造发育地段为突水危险区。理论分析与定量评价结果基本一致。针对9-10-11号煤层底板突水安全评价结果,提出了相应的防突水对策。 相似文献
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深部开采突水具有突发性、滞后性和强致灾性等特点,研究突水通道成因、演变规律和致灾机制成为控制深部开采底板突水的关键。大量的防治水实践和理论证实,构造突水通道一般发生在构造与岩层接触面处,为此建立隐伏构造条块体突水判据模型,应用剪切破坏理论方法得到突水理论判据;借助深部承压水上底板断层扩展活化及导水通道演化物理模拟试验,研制了固-流耦合相似材料,选取模拟断层破坏活化的材料并进行了模拟材料的可行性分析;试验直观地展现了含隐伏断层底板在采动应力扰动和高承压水共同作用下底板裂隙形成、隐伏断层扩展、突水通道贯通的全过程。通过对试验监测数据和现象的解读,揭示了应力场-渗流场耦合作用下承压水体上采煤底板滞后突水的机制,并对突水路径形成的时空规律进行了分析探讨,为研究深部开采构造突水提供了新的方法和认识。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozach Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献