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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Air leakage through underground ventilation stoppings and in situ assessment of air leakage characteristics of remote filled cement concrete plug by tracer gas technique
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Air leakage through underground ventilation stoppings and in situ assessment of air leakage characteristics of remote filled cement concrete plug by tracer gas technique

机译：地下通风口的漏气和示踪气体技术原位评估远程填充水泥混凝土塞的漏气特性

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摘要

Between the main fan and the coalface in a mine a lot of air is lost through leakage at stoppings, doors, air-crossing etc, so that a much larger quantity of air has to be circulated by the fan in order that the stipulated quantity of air reaches the face. Stoppings are of vital importance not only for effective ventilation of underground mines but also for isolation of areas affected by fire or susceptible to spontaneous heating. Generally, isolation stoppings are made of brick in cement mortar. If the area is far from the pit or unapproachable, it is very difficult and sometimes impossible to build these stoppings. To overcome these difficulties, particularly near fire affected zones, an alternate successful attempt was made in Indian mines to make a plug underground, from surface through borehole, using cement concrete. In this paper the salient features of the methodology adopted for construction of the plug and the experimental procedure for the measurement of air leakage by SF6 tracer gas is described. Measurements of air leakage through rows of ventilation stoppings in two mines viz. Moira (Jambad and Kajora seams) and Kuardi 11/12 (Niga seam) collieries of Eastern Coalfields Ltd. (ECL) have been incorporated. Results of experiments conducted at the Central Mining Research Institute (C.M.R.I) to determine leakage through 25 and 38 cm thick brick stoppings are also discussed. Results of all these studies are compared, which show that the efficacy and reliability of the remote filled cement concrete plug in respect of air permeability is satisfactory.
机译：在矿井的主风机和采煤工作面之间，由于停机，门，空气通道等处的泄漏而损失了许多空气，因此，风机必须循环大量的空气，以使规定数量的空气流通。空气到达脸上。塞子不仅对地下矿井的有效通风至关重要，而且对于隔离受火或易受自热影响的区域也至关重要。通常，隔离挡块由水泥砂浆中的砖制成。如果该区域远离坑或无法接近，则很难建立这些停靠点，有时甚至是不可能的。为了克服这些困难，特别是在受火灾影响的地区附近，印度矿山进行了另一项成功的尝试，即使用水泥混凝土从地表到钻孔在地下打堵。本文介绍了用于构造塞子的方法的主要特点，以及通过SF6示踪气体测量漏气的实验步骤。通过两个矿井中排风口的漏气测量。合并了Eastern Coalfields Ltd.（ECL）的Moira（Jambad和Kajora煤层）和Kuardi 11/12（N​​iga煤层）煤矿。还讨论了在中央矿业研究院（C.M.R.I）进行的实验结果，以确定通过25厘米和38厘米厚的砖块堵漏处的泄漏情况。比较所有这些研究的结果，结果表明，远距离填充的水泥混凝土塞在透气性方面的功效和可靠性令人满意。

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