金属非金属地下矿山风量按排尘风速计算，电耙道和二次破碎硐室巷道的最低风速不小于()A:0.25m/sB:0.15m/sC:0.05m/sD:0.50m/s

作者: rantiku 人气: - 评论: 0

问题金属非金属地下矿山风量按排尘风速计算，电耙道和二次破碎硐室巷道的最低风速不小于()

选项 A:0.25m/s B:0.15m/s C:0.05m/s D:0.50m/s

答案 D

解析硐室型采场最低风速不小于0.15m/s，巷道型采场和掘进巷道不小于0.25m/s；电耙道和二次破碎硐室巷道不小于0.50m/s。

分享到：

猜你喜欢

发表评论

更多 网友评论 （0 条评论）

暂无评论

错误啦！

消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
文件: /twcms/kongphp/cache/cache_redis.class.php
位置: 第 85 行

<?php echo 'KongPHP, Road to Jane.'; ?>