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1)  "three soft " and unstable coal seam
三软不稳定煤层
2)  "three soft" unsteady thick coal seam
"三软"不稳定厚煤层
3)  unstable coal seam
不稳定煤层
1.
Longwall mining along the dip of the unstable coal seam and strata control;
不稳定煤层倾斜长壁开采及矿压控制
2.
According to the analysis of the feature and origin of unstable coal seam,the article introduces the corresponding methods of developing and mining district preparation,which provide a technological reference for extracting unstable coal seam.
通过不稳定煤层的特点及成因分析,采取与之相适应的开拓及采区准备方法,为开采不稳定煤层提供了参考。
3.
The raining of unstable coal seam is a thorny thing for miner.
不稳定煤层的开采,历来是采矿工作者的棘手问题。
4)  inclined and unstable seam
倾斜不稳定煤层
1.
Introduced the technical experiences and the main safe measures as will as the technical and economic benefits adopted in sublevel caving mining with blasting method appied to 27°-32° inclined and unstable seam in Baimiao coal mine.
介绍了白庙煤矿在27°~32°倾斜不稳定煤层中采用炮采放顶煤开采的技术经验、主要安全技术措施及取得的技术经济效果。
5)  three soft coal seam
三软煤层
1.
Numerical simulation for bolting net spray composite support of three soft coal seam tunnel
三软煤层巷道锚网喷联合支护的数值模拟
2.
Analysed the reason of roadway supporting problem,based on heave problem of roadway in three soft coal seam,depth of pressure-relief bore hole was optimizated with numerical simulation,specific solution was proposed,too.
分析了偃龙矿区软岩巷道难以支护的原因,针对三软煤层巷道底鼓问题,采用数值计算方法对底板卸压钻孔深度进行优化设计,并给出了具体的解决方案,即位于底板中部直径为150~300 mm的卸压钻孔,深度应大于巷道底板宽度的一半,小于锚索锚固段的作用范围。
6)  three-soft coal seam
三软煤层
补充资料:稳定/稳定浴
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性质:照相中的稳定作用是指防止感光材料在保存过程中由于药膜中残留药液的作用而引起的暗褪色、色污染及霉变等弊病。通过正常冲洗或无水洗加工最后一个工序——稳定工序,可稳定照相影像,使之不变或变化极小。能起稳定作用的浴液称稳定浴。无水加工中的稳定浴主要由pH值控制剂、铁隐蔽剂、防霉剂、坚膜剂、软水剂、有机助剂等组成。

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