1) roof rock borehole
顶板岩石钻孔
1.
The gas management technology of the roof rock boreholes is described as follows:applies the boreholes arranged in the roof,under the action of the drainage pump negative pressure,changes the flow direction in the goaf fall district and crack district,makes it into the wind rodaway,reduces the wind gas amount,controls the corner gas accumulation.
顶板岩石钻孔抽放瓦斯技术,主要是利用布置在煤层顶板中的钻孔,在抽放泵负压作用下,改变采空区冒落带和裂隙带内积存的瓦斯流向,使其直接进入回风巷,减少工作面的风排瓦斯量,控制上隅角瓦斯积聚。
4) limestone roof
石灰岩顶板
1.
Study on the collapsing characteristic of the complex limestone roof
复合石灰岩顶板垮落特性研究
2.
In order to research support technology of gob-side entry retaining under limestone roof,according to the characters of large flap top and slow subsidence for limestone roof,the paper established the roof cutting mechanical model of gob-side entry retaining and designed quantitatively the support parameters for untied roof cutting of anchor and single prop.
为深入研究石灰岩顶板条件下沿空留巷技术,针对石灰岩顶板具有悬顶大和缓慢下沉的特点,建立了沿空留巷切顶力学模型,定量设计了锚索与单体支柱联合切顶支护参数。
5) roof and floor rock
顶、底板岩石
1.
Based on the mechanical properties of coal and its roof and floor rock from different area,the mechanics characteristics of main rock types were summarized,and the difference of rock mechanics properties among them was discussed.
基于不同地区煤岩及顶、底板岩石样品的力学性质数据,总结了主要岩石类型的力学性质特征,重点对两者力学性质的差异进行了对比研究,分析了决定岩石力学性质的主要控制因素,如岩性、孔隙特征和含水率。
6) drilling inclined roof
顶板倾向钻孔
补充资料：地表钻孔抽水
地表钻孔抽水
dewatering through well
d{bjoo之uankong ehoushu}地表钻孔抽水(dewatering through well)为了解除矿区地下水害威胁，在地表矿区边界之外的来水方向上围绕矿体开凿若干个大直径钻孔，在钻孔内安放深井泵或潜水泵排水，使矿区开采地段处于疏干降落漏斗水面之上的疏干方法。钻孔布置见矿山深井降水孔平面图。钻孔直径D可按公式D一d十50+2 了尸·、’· 户。’\。。/ 望‘，卜’。 户)’力价 /{/。一、\ 匕一办’\ 矿山深井降水孔的平面图 l一来水方向;2一抽水钻孔; 3矿区;4一隔水层(a十b)计算。其中d为水泵的最大外径，mm;。为过滤管的厚度，mm;b为充填料的厚度，mm。地表钻孔抽水疏干在地表进行，施工简单、方便，劳动条件好、施工管理容易，钻孔的布置及疏水设备的迁移都比较灵活。因此，在条件允许的情况下，应该尽量采用地表钻孔抽水，疏干矿床。 (张福有)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条