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Goaf gas flow and distribution patterns were studied by means of CFD numerical simulation.

采用CFD数值模拟方法对采空区瓦斯流动及分布规律进行了研究。

By site geologic investigation, the paper evaluates stability of goaf , and takes relevant treatment measures of ground and structure.

通过现场地质勘测，对采空区的稳定性作出评价，并采取相应的地基、结构处理措施。

The gas drainage problems in the top adjacent strata and goaf can be solved.

这可以解决上邻近层和采空区的瓦斯抽放问题。

In goaf the float coal spontaneous combustion disaster affects seriously the safe production of the coal mine.

采空区浮煤自燃灾害严重影响了煤矿的安全生产。

Much attention should be paid to the permeability of broken rocks in goaf for the sake of the gas outburst and disaster prevention.

破碎煤体的渗透特性是影响煤矿瓦斯抽放和地下采空区突水灾害预防的重要因素之一。

Through numerical simulation,the characteristics of goaf flow field and gas transportation under J-shape and U-shape ventilation systems were analyzed.

通过数值模拟，对比分析了J型通风和U型通风条件下的采空区流场及瓦斯运移特征。

This paper deals with the geological phenomenon,type and occurrence of the deformation and failure of the slope above the goaf.

论述了采空区地表斜坡变形和破坏的地质现象、类型及其运动机制。

A massive and wide range of goaf is formed in whole country after years of exploitation. With the high increase of national economy, the land resources are more precious than before.

煤炭是我国主要能源之一，多年的开采在全国各地形成了很多大范围、大规模的采空区。

The alternative method to drill gas drainage holes underground is to drill boreholes from surface to the goaf area.

采用地表垂直钻孔抽放采空区内的瓦斯是瓦斯治理技术的另一选择。

Some problems of bore grouting engineering for coal gob area are discussed in this paper.

文章对煤矿采空区治理工程中的钻孔注浆问题进行了讨论。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。