硫铅酸盐“S”型瞬凝水泥干法护壁堵漏技术研究          下载免费PDF全文

彭振斌 《探矿工程》1995,(2):41-42,60

介绍了硫铝酸盐“Ｓ”型瞬凝水泥干法者漏时使用的配方,阐述了输送工具和扫孔钻具的设计以及灌注工艺技术。  相似文献   

Mobility of heavy metals from tailings to stream waters in local zinc smelting activities contaminated site     

Taoze LIU Yuangen YANG Bangyu LIU Xiangyang BI Feili LI 《中国地球化学学报》2006,25(B08):41-42

It has been found that stream waters were severely contaminated with wastes from a long-time smelting factory in Hezhang, Guizhou, China. The main sources of contamination are the smelting wastes stored in the open air and abandoned in the vicinity of stream. A method of lead isotope was adopted in order to identify relations between tailings and water contamination. Representative samples of tailings and stream sediments were collected. Mineralogical characterizations were conducted using XRD and TEM/SEM, while acid digestion was carried out for determining metal contents. BCR sequential leaching tests were performed in order to assess metal mobility. The tremendous ‘actual＇ and ‘potential＇ mobility of heavy metals indicates that the smelting waste and stream sediments present a considerable threat to the environment. Besides the chemical remobilization of heavy metals from the sediments and the reworking of riverbed sediments act as a secondary source of pollution. Also groundwater and stream water were sampled in specific locations and were measured.  相似文献   

Increasing of efficiency of desulphurisation processes of coals during thermal destruction     

Turchanina Oksana Satin Vladimir Derevyanko Aleksey 《中国地球化学学报》2006,25(B08):51-52

As is well known, a high content of sulphur in coals is an effect of the post-depositional history of coal seams and one of the most important criteria of its use as a fuel. Sulphur in coals can cause a serious environmental and technological problem during their utilization. This problem is very actual for the Donetsk Basin because 734 mined seams out of the total of 1009 （73%） are comprised of coals with sulphur content -2%. The chemical pre-treatment as a first stage in their processing is widely used in order to effectively obtain the thermal destruction products of coals （such as semi-coke, coke, adsorbents, etc.） and to simultaneously utilize coal wastes. Development in pre-treatment methods for high-sulphur, low-rank coals is especially desirable for reducing the sulphur contents of the solid products. The aim of the present work is to investigate the influence of coal pre-treatment on the yield and composition of thermal destruction products, and the sulphur distribution among different components of the coals of different genetic types by reductivity （low-reduced LRC and reduced RC coals）. The thermal behavior of the coals was studied by means of the Fisher method （heated to 520℃, at a rate of 7℃/min）. The composition of the semi-coking gas was investigated by means of a VTI gas analyzer. The coal samples were chemically treated directly before thermal destruction by the introduction of 1-% solutions of radical polymerization initiator AAD （acrylic acid dinitrile C8H12N4） and products of coal-tar distillation （absorber oil）. Coal pre-treatment increases the semi-coke yield and its coking ability, and changes the liquid/gaseous product ratio.  相似文献   

空气潜孔锤与气举反循环钻进组合工艺在水文水井钻探中的应用          下载免费PDF全文

赵鸿杰  孙智杰 《探矿工程》2006,33(11):52-53

阐述了空气潜孔锤与气举反循环钻进组合工艺的技术特点和施工特点，通过两口水井施工实例充分展现了其在施工效率、成井质量、洗井效果、市场竞争等方面的优越性。  相似文献   

山东淄博煤矿大口径超深基岩排水孔钻井技术          下载免费PDF全文

赵光贞  刘玉仙  李海波 《探矿工程》2006,33(8):53-54

由于第四系、二叠系、石炭系岩性复杂及缩径、坍塌、漏失等情况，山东淄博煤矿大口径超深定向排水孔成井难度大。该井采用了水泥注浆堵漏和水泥造壁稳定孔壁，应用“气举反循环＋垂钻”钻进工艺方法控制钻孔顶角，应用阶梯式组合牙轮钻头、水泥固井止水等技术方法，达到了设计要求。  相似文献   

沁水盆地煤层气钻井工艺方法   总被引：1，自引：1，他引：1  

李云峰 《中国煤田地质》2005,17(6):52-53,70

针对沁水盆地煤层气概况,地层情况及开采条件,介绍了参数井、生产井、多分支地面煤层气水平开发井、丛式井等钻井工艺、钻具组合、井身结构及井身质量要求.  相似文献   

巨石、中粗砂填海区风动潜孔锤引孔钻进工艺应用的研究     

王平  彭晓阳等 《地质与勘探》2002,38(5):74-77,85

通过成功地解决深圳市好湾电厂（二期）基础工程H型桩沉入困难问题，使用各种风动潜孔锤在巨石、中粗砂填海区进行了引孔钻进工艺的试验研究及应用，对风动潜孔锤钻进工艺及其机具的使用作了进一步的分析研究，提出了风动潜孔锤使用过程中工艺方面的改进措施。  相似文献   

管棚施工的影响因素及设备选择          下载免费PDF全文

王毅  石智军  韩仕洲 《探矿工程》2002,(5):62-63

通过对影响管棚施工的几个主要因素的分析，介绍了管棚施工设备的选择原则，结合实例详细介绍了MK系列钻机的特点及在管棚施工中的应用效果。  相似文献   

矿井明水注浆技术     

张宏 《中国煤田地质》2003,15(1):39-40,50

明水注浆是在巷道已经发生涌水后进行堵水注浆的一种方法，以开滦东欢坨矿井下明水注浆实践为基础，阐述了明水注浆技术及注浆工艺。大水矿井由于排水电费占生产成本的比例较大，影响企业的经济效益，进行明水注浆有着重要的意义。  相似文献   

中国煤炭地质钻探技术发展五十年   总被引：1，自引：1，他引：1  

李生红  丁祥发 《中国煤田地质》2003,15(6):77-80

概要介绍了煤田钻探技术五十年来的发展状况，提出了今后的设想。  相似文献