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根据霄雲煤矿1313工作面突水情况,以及该突水点周围地层和构造,针对该突水点采用定向钻孔施工技术进行堵水施工,同时施工4个定向钻孔,其中施工2个突水通道注浆孔XY1、XY2封堵通道,定向封堵通道孔找准涌水通道是钻孔施工的关键;2个盖帽钻孔XY3、XY4,定向盖帽孔对准突水点封堵并提高注浆水头压力是钻孔施工的关键;钻孔钻穿突水点附近上方的采空区顶板,通过向突水点附近的采空区注入石子、沙子、水泥等封堵出水点,起到封盖出水点的作用。采用下行方式注浆,逢漏（漏失量大于10m3/h）注浆封堵。根据钻探揭示的实际地质及水文地质条件,对钻孔的裸孔段,采取下行、大小间歇、复扫、复注的方式,达到注浆终止条件为止,凝固24h后,继续钻进,遇漏重复注浆,直至设计终孔深度为止。 相似文献
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在煤田(炭)地质勘探工作中,钻孔孔内冲洗液漏失是钻孔施工中常遇到的而且是必须解决的问题.钻孔孔内冲洗液漏失的客观因素是遇到漏失层;如未胶结和半胶结的松散层,冲积层、洪积层,基岩风化带,粗砂岩孔隙,裂隙,石灰岩的溶隙、溶洞及采(古)空区塌陷、裂隙等.主观因素是钻进技术方面.针对钻进过程中所遇到的不同的钻孔漏水客观地质条件,提出了五种不同的防治方法以提高工作效率,缩短施工时间,降低勘探成本,确保安全生产. 相似文献
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煤炭资源开采产生的沉陷变形会对土地资源造成严重破坏,因此针对巨厚松散层下煤炭开采产生的地面沉陷变形分布
规律的研究具有十分重要的意义。以山东济宁横河煤矿为例,运用概率积分法分别建立了主断面和采区任意点的预测模型,预测
了2# 、3# 煤层先后开采后地表下沉、倾斜、曲率、水平移动、水平变形等特征。预测结果显示,横河矿区下沉面积为78hm2,最大
下沉值达到9.987m,与现场调查的实际情况基本吻合。由于横河矿区由巨厚松散层覆盖,相比一般采矿条件下,地表沉陷具有地
表下沉系数较大、地表最大下沉值较大、水平移动系数和水平移动值较正常值偏大、沉陷范围大、拐点偏移距较小等特点。 相似文献
规律的研究具有十分重要的意义。以山东济宁横河煤矿为例,运用概率积分法分别建立了主断面和采区任意点的预测模型,预测
了2# 、3# 煤层先后开采后地表下沉、倾斜、曲率、水平移动、水平变形等特征。预测结果显示,横河矿区下沉面积为78hm2,最大
下沉值达到9.987m,与现场调查的实际情况基本吻合。由于横河矿区由巨厚松散层覆盖,相比一般采矿条件下,地表沉陷具有地
表下沉系数较大、地表最大下沉值较大、水平移动系数和水平移动值较正常值偏大、沉陷范围大、拐点偏移距较小等特点。 相似文献
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文章总结了梧州市常用的沉管灌注桩、钻孔灌注桩和人工挖孔桩在以花岗岩残积土为桩基持力层时施工中的特点及容易出现的问题 ,并提出相应的解决办法 相似文献
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伴随着中国高镁低锂老卤溶液提纯碳酸锂的关键技术取得突破,卤水提锂日益受到重视。深地资源勘查开发专项中的锂能源金属矿产基地深部探测技术示范项目在川东北宣汉地区布置了3 227 m深钻孔(ZK001),主要研究目的是探讨深部是否存在富锂卤水。随钻流体(常用钻探循环泥浆气体)分析是常规井口流体实时监测的主要手段,但因Li化学性质活泼,气体组分难以全面反映Li的富集浓度,故本次对钻孔流体(包含深部卤水、随钻流体、钻孔洗井水)及钻孔周边地表水、地下水进行了取样分析,首次获得了川东北黄金口ZK001钻孔流体组分特征,初步归纳了钻孔流体中Li及其他主要组分的变化规律。结果表明:川东北黄金口各类型水样品Li质量浓度从大到小依次为深部卤水、钻孔洗井水、随钻流体、地下水、地表水;比较ZK001钻孔随钻流体组分随深度变化特征,发现0～500 m深度随钻流体Li质量浓度相对较高,Mg/Li值较低,且流体Li质量浓度异常与深度成正比,Mg/Li值与深度成反比;ZK001钻孔3 000 m深度处采集的黄色卤水Na、K、Rb、Sr等有用组分达到卤水工业品位,Li质量浓度(10 556μg·L~(-1))接近边界品位(24 599μg·L~(-1))的一半,Mg/Li值为33.92。上述钻孔流体特征将为下一步钻探工程布置提供科学支撑。 相似文献
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地质钻探是最直接的勘查手段,是具有高风险的隐蔽工程.频发的孔内事故造成了重大损失甚至导致钻孔报废,如何提前做好预防,保障工程顺利实施是钻探施工的重要环节.本文以"胶东ZKLG1深部地热资源调查孔"为例,对施工过程中遇到的孔内事故与难题处理方法进行分析和总结,旨在为今后预防和处理类似孔内事故提供一定的借鉴和参考. 相似文献
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油气长输管道常采用水平定向钻(HDD)方式穿越河流,我国四川盆地内一些河流地层以冰水沉积为主,其中含有大量的卵砾石,穿越施工风险较高,结合兰成渝输油管道某河流穿越改造工程,对冰水沉积地层特点以及相应的穿越风险因素进行了分析,选择了合理的钻具组合,并针对钻具组合进行了钻具受力分析,确定钻杆最大应力为171.5 MPa,选择的钻杆能够满足施工要求。考虑到冰水沉积地层特点,采用套管隔离表层卵砾石、大直径钻头和带有角度泥浆马达、高黏度泥浆护壁、改性环氧玻璃钢外防腐层防护等措施,现场实施结果显示,定向钻钻孔稳定性良好,管道回拖施工过程中回拖力平稳,为水平定向钻穿越卵砾石层提供了新的思路。 相似文献
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《山地科学学报》2015,(5)
Valuable geological and environmental information can be obtained from the 200 m thick lacustrine sediments in the Diexi lake(an ancient landslide-dammed lake) of the Minjiang River. The shaking table test method was employed to study the disturbance phenomena which occurred in the Diexi lake sediments. The results show that the disturbance phenomena were caused by liquefaction-induced flows in the unconsolidated lacustrine sediments, due to triggering by earthquakes. The deformations only occurred in unconsolidated sediment layers and not in consolidated layers. This means that a consolidated layer cannot be liquefied and disturbed again by an earthquake for a second time. The disturbance on one layer corresponds to only one earthquake. The temporal occurrence of earthquakes could be determined by disturbance layers generated at different ages. In total, 10 disturbed layers were found in the lacustrine sediments of the Diexi lake. The experiments showed that there were more than 10 earthquakes between 30 ka B.P. and 15 ka B.P. in the Diexi lake area based on the dating of the disturbed sediment layers. 相似文献
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The distributions of thickness of unconsolidated Quaternary sedimentary layers in Jiaozhou Bay and Qingdao offshore area were studied by using 1079-km high-resolution shallow seismic profiles and drilling core data, and the factors controlling the Quaternary evolution were discussed. The results show that such thickness distributions resulted from the coactions of geologic structures and marine hydrodynamic conditions since the Holocene. The geologic structures controlled the slope deposit, proluvial and fluvial fillings since the late Pleistocene. Holocene marine hydrodynamics eroded away sediments at the bay mouth, and tides carried these eroded materials to the sides of the bay mouth and released them there, forming channel-ridge-alternating geomorphic features. During transgressive processes, the sea level rose rapidly, and insufficient sediment supply and tidal actions yielded the relict sediments in the east of Qingdao offshore area. 相似文献
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板厂铜钼多金属矿区处于秦岭造山带东段的北秦岭褶皱带内,位于区域深大断裂朱阳关—夏馆断裂带中段,为河南省发现的第一个大型铜矿床。为增储开展了预查、普查工作,先后投入2.36万m的钻探工作量,将板厂铜矿带的找矿深度延伸了近千米,主矿体最大厚度达285.95 m。通过系统采集板厂铜钼多金属矿床220~76勘探线共23个钻孔的岩矿样品,初步分析了矿床原生晕的分布特征,重点对施工钻孔最多的172勘探线开展了典型构造流体运移通道的解剖研究,印证流体运移成矿具有前铜后钼的分带特征,并采用格里戈良分带指数方法建立了矿区原生晕垂向分带序列为Sb-As-Pb-Bi-Zn-Ag-Sn-Cu-W-Au-Mo,总结了矿床异常元素的分带规律,结合172勘探线矿体空间展布情况,进一步建立4个分带指数作为评价隐伏矿体空间位置的指标,为深部找矿预测提供了地球化学依据。在172典型勘探线研究的基础上,全区钻孔原生晕并结合CSAMT剖面地球物理特征进行了地质、物探和化探综合分析,预测成矿母岩（燕山期花岗斑岩）赋存位置,认为深部存在可能比目前主矿体规模更大的矿体,圈定了找矿预测靶区,为后期深部及外围勘查工作指明了方向。 相似文献
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FGC-15D large-diameter DTH air hammer drilling system and its application in offshore rock-socketed pile hole drilling 总被引：1，自引：0，他引：1
Kun YIN Jianming PENG Maosen WANG Zhanjiang ZHOU 《东北亚地学研究》2006,9(2):138-140
In the past two decades,numerous large-diameter rock-socketed piles were constructed in China to support foundations of skyscrapers,great bridges or to retain soil in potential geological hazard areas.However,drilling large-diameter rock-socketed pile holes with conventional drilling method such as rotary drilling or cable tool drilling is time-consuming and the cost is usually very high.In order to drill large-diameter rock-socketed pile holes faster at relatively low cost,the FGC15A large-diameter DTH air hammer drilling system was developed in 1987 and was given the second-class award by Ministry of Geology and Mineral Resources in 1991.Since it was innovated the drilling system has been used in more than twenty important and tough projects on land,and wonderful results were acquired.At the same time the large-diameter DTH air hammer drilling system was improved continuously.The FGC15D is the latest version of the technique. 相似文献
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In the past two decades, numerous large-diameter rock-socketed piles were constructed in China to support foundations of skyscrapers, great bridges or to retain soil in potential geological hazard areas. However, drilling large-diameter rock-socketed pile holes with conventional drilling method such as rotary drilling or cable tool drilling is time-consuming and the cost is usually very high. In order to drill large-diameter rock-socketed pile holes faster at relatively low cost, the FGC15A large-diameter DTH air hammer drilling system was developed in 1987 and was given the second-class award by Ministry of Geology and Mineral Resources in 1991. Since it was innovated the drilling system has been used in more than twenty important and tough projects on land, and wonderful results were acquired. At the same time the large-diameter DTH air hammer drilling system was improved continuously. The FGC15D is the latest version of the technique. 相似文献
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中国南海珊瑚岛礁拥有巨大的资源潜力和科研价值。珊瑚岛礁第四系覆盖层结构为珊瑚砂和珊瑚骨架的松散堆积物,无胶结,钻探取心、成井极端困难。通过南海诸岛礁数百口钻井的施工实践,总结出"套管连续跟进干钻取心技术",工艺要点为4个步骤循环操作,称为"四步法"。使用该技术:①能确保珊瑚岛礁第四系覆盖层岩心采取率达到95%以上,并基本保持岩心原状性;②能实现在珊瑚岛礁第四系覆盖层中不使用泥浆护壁情况下安全钻进成井,达到避免地层过水通道堵塞、满足抽水试验要求的效果。研究成果对于珊瑚岛礁钻探具有重要的借鉴作用。 相似文献
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作者以丙烯酰胺泥浆为例，阐述了聚合物泥浆的井壁防塌机理；对聚合物泥浆井壁防塌效果进行了实验与分析记述，指明了聚合物泥浆井壁防塌的现场处理方法。认为聚合物泥浆有较好的井壁防塌和维护井壁稳定的效果；指出跟聚合物泥浆与CaCl2，KCl，NaCl等无机盐类相结合使用是防止井壁塌坍的良方；使用聚合物泥浆不仅是促进钻井工艺技术进步，且提高了钻井效益。 相似文献