结果表明：随低强焊缝金属相对宽度变小，接头抗拉强度增大；
Its results show that with decreasing the relative width of under-matching weld metal, the tensile strength of welding joint increase.
断裂孕育时间随材料的蠕变指数、上覆岩层压力的增大而减小；裂隙扩展时间也随材料的蠕变指数、上覆岩层压力的增大而减小，但随岩石的抗拉强度增大而增加。
Also, the crack extension time decreases with the increase of material creep index and the loading of overlying strata rock while it increases with the increase of tensile strength of roof rock.
结果表明随着试样宽度的减小，抗拉强度、厚向异性系数减小，板平面方向性系数增大；
The results show a decrease of tensile strength and mean vertical anisotropy and an increase of plane anisotropy with a decreasing of the width of specimen.
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