根据《煤矿防治水规定》，新建、改扩建矿井或者生产矿井的新水平，正常涌水量在1000m3/h以下时，主要水仓的有效容量应当能容纳几小时的正常涌水量？ _安全生产知识竞赛_全学科试题题库

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根据《煤矿防治水规定》，新建、改扩建矿井或者生产矿井的新水平，正常涌水量在1000m3/h以下时，主要水仓的有效容量应当能容纳几小时的正常涌水量？
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