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Work face 3312 of coal mining in a colliery was taken as an example in which methane data in a series of locations was analyzed.
For the purpose of data analysis, work face 3312 was divided into sections with 20 powered supports and some measuring-points
in a section. Through analysis based on the sectional control volume model, the following points are concluded: (1) the location
of gob air flow begins flow into coal face in 70 m away from the haulage gallery; (2) in the control volumes No.10 and No.30,
the ratios of methane intensity from coal face into gob to the methane intensity in the corresponding control volume are 30%
and 22%; (3) in the control volume No.50 to No.110, the ratios of methane intensity from gob into coal face to the methane
intensity in the corresponding control volume are 4%, 17%, 22% and 53%, respectively. 相似文献
12.
利用Auto CAD系统面向对象开放性的特点,结合绘制采矿矿图的实际,对AutoCAD系统进行了定制,建立了一个常用的采矿图例库,并将其添加在Auto-CAD系统界面菜单中。通过在计算机实践证明,这一技术能够提高绘图效率。 相似文献
13.
根据铜川崔家沟矿2207工作面采空区温度传感器以及束管的氧气指标气体,通过收集的数据分析得到温度及氧气与采空区煤自燃"三带"的关系,确定煤自燃"三带"的分布范围,并提出了防止煤自燃的措施,对回采面的安全生产有重要的指导意义. 相似文献
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采空区瓦斯涌出经常造成工作面上隅角的瓦斯浓度超限,其中一个重要因素是与所处的工作面通风环境有关,而工作面通风又跟矿井通风系统密切关联。为了了解采空区瓦斯分布特点及其与漏风的关系,在矿井通风网络解算条件下,对"U"型工作面采空区漏风分布进行数值分析研究,以网格化方式建立采空区漏风通道模型,再依据矿井通风网络基本原理设计了模拟计算流程,通过编程将其嵌入到矿井通风网络解算模型中。通过对某矿通风系统及采空区漏风分布的模拟计算,模拟结果与实际相符,表明所研究模型对于工作面漏风及瓦斯治理具有重要指导意义。 相似文献
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