The lay of the strata can imply that the rock splits easily along its direction of cleavage .

成层的地层意味着岩石易于沿着其解理方向裂开。

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Conclusions Although void formed due to underground mining is the origin of the strata movement, side confinement of the strata played important role for the direction of the movement.

结论虽然由于无效形成地下开采，是地层运动起源，地层侧隔离发挥了该运动方向的重要作用。

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By analyzing the geological characteristics, function of coal gathering, coal measures strata and burial conditions of Jiyuan area, it is pointed out the prospecting direction for coal field.

通过对济源西部地质特征、煤田聚煤作用、煤系地层及埋藏条件的分析，提出了在该区的找煤方向。

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