... 有效防护最低指标 minimum effective protection requirement 有效使用期 effective duration 冒顶片帮 roof fall rib spalling ...
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2.82 冒顶片帮(Roof Fall and Rib Spalling) 冒顶片帮——矿井工作面，巷道侧壁在矿山压力作用下变形，破坏而脱落的现象称为 片帮；顶板失控而自行冒落的现象称为冒顶。
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... 坍塌 collapse 冒顶片帮 roof fall and wall collapse 透水 water inrush ...
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片帮冒顶 spalling and roof falling
冒顶片帮事故是地下矿山危害最为严重的事故，矿山地压管理是地下开采矿山安全管理的重要任务。
Roof fall accident is one kind of dangerous accidents happened at underground mines and underground pressure management is the main task of mining safety management.
前言： 石台煤矿II3123工作面为“三软”煤层轻放工作面，顶板破碎易掉，片帮、冒顶时常发生。
The II3123 face is a light type caving face of three-soft coal seam. the roof is cracked, sloughing and roof fall often occur.
武山铜矿南矿带采用上向水平分层进路水砂充填法回采，采场多次发生冒顶、片帮。
The South ore-bearing zone of Wushan copper mine is mined with ascending horizontal slicing hydraulic fill crosscut mining system. Roof falling and rib spalling occurred in any times.
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