On the basis of analyzing mechanical situation of floor strata of roadway driving along goaf in fully mechanized sub level caving face, a mechanical model was established.
在分析综放沿空掘巷底板力学环境的基础上，建立了底板力学分析模型。
To add emphasis, the color and font weight is changed for this list item and any sub-level list items within it.
为了增强效果，我们修改了这个列表项和其中任何子列表项的颜色和字体粗细。
The styling for the sub-level list items is also changed so that the background images used to create bullets appear in a corresponding color.
还改变了子列表项的样式，让用来创建符号的背景图像显示为对应的颜色。
Rock in coal seam, suggest casting away sub-level caving.
对于煤层内夹石厚度比较大的情况，建议不采用放顶煤开采。
The mining practice of sub-level longwall face in Yima coal mine of Henan Province was introduced. These techniques could be used in coal mines with similar condition.
开采结果表明，论文中提出的对岩层结构的认识和采取的控制技术是正确的，可以在条件相似的矿区推广应用。
Sub-level caving is an efficient and safe mining method.
无底柱分段崩落采矿法是一种高效安全的采矿法。
The distribution law of inner stress field and its effect on controlling underground impact pressure are discussed, when sub-level caving method is introduced.
讨论了放顶煤开采的采场应力场的分布规律及其对冲击地压的控制作用。
The advantages of this method are inexpensive, simple for construction and able to get good benefits to retain roadway for next sub-level.
该法施工工艺简单，成本低廉，可使沿空留巷达到较好的技术经济效果。
The external load exerted on the support used in sub-level caving face generally moves forward.
放顶煤工作面的支架外载荷普遍前移。
Based on in situ measurement with sub-level caving mining, the characteristics of top-coal deformation and top-coal deformation vs abutment pressure are mainly discussed.
以放顶煤开采现场实测为基础，着重探讨了顶煤的变形特征、顶煤变形与支承压力的关系；
The research results have been applied successfully in the no. 8105 fully mechanized face with sub-level caving of Yanjiahe Coal Mine, and satisfactory technical and economic effects are achieved.
研究成果在燕家河煤矿8105综放面成功应用，并取得了满意的技术经济效益。
The research results have been applied successfully in the no. 8105 fully mechanized face with sub-level caving of Yanjiahe Coal Mine, and satisfactory technical and economic effects are achieved.
研究成果在燕家河煤矿8105综放面成功应用，并取得了满意的技术经济效益。
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