井筒開鑿到底后,在井底附近必須設(shè)置臨時(shí)排水系統(tǒng),當(dāng)預(yù)計(jì)涌水量不大于50m3/h時(shí),臨時(shí)水倉容積應(yīng)當(dāng)大于( )h正常涌水量;當(dāng)預(yù)計(jì)涌水量大于50m3/h時(shí),臨時(shí)水倉容積應(yīng)當(dāng)大于( )h正常涌
作者:煤礦安全網(wǎng)
2019-07-25 21:42
來源:煤礦安全網(wǎng)
井筒開鑿到底后,在井底附近必須設(shè)置臨時(shí)排水系統(tǒng),當(dāng)預(yù)計(jì)涌水量不大于50m3/h時(shí),臨時(shí)水倉容積應(yīng)當(dāng)大于(??? )h正常涌水量;當(dāng)預(yù)計(jì)涌水量大于50m3/h時(shí),臨時(shí)水倉容積應(yīng)當(dāng)大于(??? )h正常涌水量。臨時(shí)水倉應(yīng)當(dāng)定期清理。
A、2、4
B、3、6
C、4、8
D、5、10
標(biāo)準(zhǔn)答案:C