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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The results were as follows. The horizontal datum and two-pass statics method gave minimum depth error on time section.

试验结果表明，采用水平基准面两步法静校正，时间剖面反演深度误差最小；

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