1) falling space
冒落空间
1.
Using the random distribution character of structural plane in rockmass,the forecasting formula of falling space possibility is obtained.
根据地下工程冒落体形成的基本条件,讨论了结构面迹线和开挖面迹线的交集关系,由此构造出冒落体的概率空间,利用岩体中的结构面随机分布的特性,推出冒落空间的概率预测公式。
2) Caving in mined area
空区冒落
3) caving goaf
冒落采空区
4) gob caving band
采空区冒落带
1.
Roof rock drilling pulls out gas at gob caving band and gob caving slit band,redules gas consistency In stope corner and return airway and avoids stope corner and return airway gas overrun,at the same time,the wind speed overrun is settled at stope.
告成煤矿的主采二1煤层属典型“三软”厚煤层,回采工作面隅角和回风流中瓦斯体积分数超限的主要原因是采空区瓦斯涌出过多,采取顶板岩石钻孔的方法对采空区冒落带及冒落裂隙带的瓦斯进行抽放,降低了回采工作面隅角和回风流中的瓦斯体积分数,避免了采煤工作面隅角和回风流瓦斯体积分数超限,同时克服了工作面风速超限的问题。
5) gob rock
采空区冒落体
6) fall
[英][fɔ:l] [美][fɔl]
冒落
1.
The hing girder assorting with π type steel used in broken caving roof in Nanshan Coal Mine,Hegang Mining Bureau can not only solve the roof fall accident but also meet the needs of section mining support.
鹤岗矿务局南山煤矿在破碎易冒落顶板中 ,铰接顶梁与π型钢梁配套使用 ,不仅解决了顶板易发生的抽漏冒顶事故 ,而且满足了分层开采各分层顶板支护的要
2.
Through observing and analyzing to roof and wall of spot in 6114 workface,this paper sum up rules and features of rib spalling and roof fall under complicated geology condition in sub-level caving mining workface,it raises a series of roof control measures and gets good result.
通过对 6 114工作面顶板、煤壁现状的现场观测和理论分析 ,总结出了复杂地质条件下综放工作面煤壁片帮、端面顶板冒落的规律和特点 ,提出了一系列复杂地质条件下综放工作面顶板控制措施 ,现场应用后取得了较好的效
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