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1)  roof limestone
顶板灰岩
1.
Through using of ejection for water plugging plan at roof limestone of ore body under shaft in Gujiatai mine the good effect of water plugging is achieved and it can meet the requirements of mining production.
谷家台矿区采用井下矿体顶板灰岩注浆堵水方案,堵水效果良好,完全达到采矿生产的要求;同时避免了全面预先疏干法和地面垂直帷幕注浆堵水法引起的地面塌陷、居民搬迁、嘶马河改道等一系列问题。
2)  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。
3)  slate roof
板岩顶板
4)  Roof rock mass
顶板岩体
5)  soft rock roof
软岩顶板
6)  roof overburden
顶板覆岩
1.
Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face;
综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究
补充资料:化工灰岩矿
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性质:一种以方解石为主要矿物组分的非金属矿产。常含少量的白云石、菱镁矿等。包括电石灰岩和制碱灰岩。化工灰岩矿一般品位指标见表。用露天开采法,一般不选矿或用洗选法处理。用于制造碱、电石、轻质碳酸钙,还可用作催化剂、漂白粉、钙质饲料及其他化工原料。项  目电石灰岩(以氧化钙计)/%制碱灰岩(以碳酸钙计)/%边界品位5288工业品位5490

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