首页/ 题库 / [单选题]直接覆盖在煤层之上的薄层岩层,岩性多为炭的答案

直接覆盖在煤层之上的薄层岩层,岩性多为炭质页岩或炭质泥岩,厚度一般为几厘米至几十厘米,它极易跨塌,常随采随落,称为:()

单选题
2021-07-19 06:47
A、伪顶
B、直接顶
C、老顶
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正确答案
A

试题解析
A

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直接覆盖在煤层之上的薄层岩层,岩性多为炭质页岩或炭质泥岩,厚度一般为几厘米至几十厘米,它极易跨塌,常随采随落,称为:()
直接覆盖在煤层之上的薄层岩层,岩性多为炭质页岩或炭质泥岩,厚度一般为几厘米至几十厘米,它极易跨塌,常随采随落,称为:()
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伪顶是指直接覆盖在煤层之上的()。
伪顶是指直接覆盖在煤层之上的薄层岩层。
直接顶是指直接覆盖在煤层之上的薄层岩层。
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