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首页> 外文期刊>Journal of natural gas science and engineering >A new effective method and new materials for high sealing performance of cross-measure CMM drainage boreholes
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A new effective method and new materials for high sealing performance of cross-measure CMM drainage boreholes

机译：交叉测量三坐标测量机排水孔高密封性能的新有效方法和新材料

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This study focuses on improving the sealing performance of the cross-measure CMM (coal mine methane) drainage boreholes. The sealing of cross-measure CMM drainage boreholes is not only related to the gas emissions but also closely related to the CMM drainage efficiency and further affects the safety of the coal miners. However, the sealing performance of the traditional sealing method becomes increasingly poor with increasing mining depth. The three main shortcomings of the traditional sealing method were revealed based on the examination of the geomechanical factors and characteristics of the traditional sealing materials. To eliminate these shortcomings and obtain an effective sealing method, 10 groups of sealing materials were tested; an automatic grout pump and two types of rubber bottom subs were developed. Next, a new sealing method, which is characterized by performing grouting two or more times with high grouting pressure was developed and compared with the traditional sealing method in engineering. The cement grout with a cement-to-water ratio of 1:0.8 is a suitable sealing material from both engineering applicability and economic perspectives. The new sealing method has a better sealing performance of the cross-measure CMM drainage boreholes than that of the traditional sealing method based on the engineering test results. (C) 2014 Elsevier B.V. All rights reserved.
机译：这项研究的重点是提高跨测量CMM（煤矿瓦斯）排水孔的密封性能。跨测量三坐标测量机排水孔的密封不仅与瓦斯排放有关，而且与三坐标测量机排水效率密切相关，进一步影响煤矿工人的安全。然而，随着采矿深度的增加，传统密封方法的密封性能变得越来越差。通过对传统密封材料的地质力学因素和特征的考察，揭示了传统密封方法的三个主要缺陷。为了消除这些缺点并获得有效的密封方法，对10组密封材料进行了测试。开发了自动注浆泵和两种类型的橡胶底接头。接下来，开发了一种新的密封方法，其特征在于以高的灌浆压力进行两次或更多次灌浆，并将其与工程中的传统密封方法进行比较。从工程适用性和经济角度来看，水泥与水的比例为1：0.8的水泥浆都是合适的密封材料。根据工程测试结果，与传统的密封方法相比，这种新的密封方法对交叉测量的CMM排水孔具有更好的密封性能。 （C）2014 Elsevier B.V.保留所有权利。

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