他衬衫的衣缝裂开了。
At the same mine, with a landmark at the seam, a large number of rock samples collected, the mine could be gushing water content of solid particles in the general law.
在同一矿井,在具有标志性的煤层、岩层中大量采集水样,便可以得到该矿井涌水中固体颗粒含量的一般规律。
Relationship curves between seam dip Angle, horizontal section height and roof deformation are derived, at the seam time, the criterion of failure is given in this paper.
得出了煤层倾角、水平分段高度对顶板变形的影响关系曲线,同时,给出了顶板破断的判据。
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