试题与答案

突出煤层中,掘进工作面与被贯通巷道距离小于()的作业期间,本贯通巷道不得安排作业,保

题型:单项选择题

题目:

突出煤层中,掘进工作面与被贯通巷道距离小于()的作业期间,本贯通巷道不得安排作业,保持正常通风,且爆破时不得有人。

A.30m

B.50m

C.60m

答案:

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