摘要：建立井下避难硐室，可以有效改善矿井的安全防护水平，提高其矿井抗灾变能力。

Abstract: Establish underground refuge room can effectively improve mine safety level and enhance the ability of mine disaster.

youdao

摘要：建立井下避难硐室，可以有效改善矿井的安全防护水平，提高其矿井抗灾变能力。

Abstract: Establish underground refuge room can effectively improve mine safety level and enhance the ability of mine disaster.

youdao