Static Penetration Test of Button Chip for Rock Drill Focused on Effect of Spacing.
Static Penetration Test of Button Chip for Rock Drill Focused on Effect of Spacing.
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关注间距影响的凿岩机扣片静态贯入试验。
DOI：
10.2473/shigentosozai.115.661
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
A. Ota
中科院分区：
文献类型：
--
作者：
S. Okubo;K. Fukui;A. Ota
迄今为止，还没有一种合适的试验方法来研究间距对穿透深度的影响。在这项研究中，提出了一种简单的测试方法，其中一个按钮芯片穿透在岩石样品的平面上，25次，在5 × 5的正方形图案。当作用力较小时，在岩石表面按预定的间距或间隔开孤立的穿透孔。当施加更大的力时，孔间岩石被凿除或完全破碎，孔彼此连接，产生覆盖所有测试区域的大开挖区域。通过全面的测试计划，发现：1。穿透一定深度所需的力与切屑直径的平方根成正比。2.对于三上目安山岩和木町砂岩，贯入深度近似地遵循三个常数<$a '、<$n'和<$c '的方程;（深度）=a（力）/（碎屑直径）0.5-B（间距）sn-c，其中<$n'取1.5~2.0之间的值。3.对于Inada花岗岩，穿透深度遵循公式：（深度）=a（力）/{（碎屑直径）0.5（间距）0.5}-c。
A proper testing method to examine tha effect of spacing on penetration depth has not been established up to now. In this study, a simple testing method was proposed in which a button chip was penetrated on flat surface of a sample rock, 25 times in five by five square pattern. When applied force was relatively small, solitary penetration holes on rock surface were made at pre-determined spacings or intervals. When higher force was applied, rock between holes was chipped away or broken completely and holes were connceted each other to produce a large excavated region covering all testing area. Through comprehensive testing schedule, followings were found ; 1. Required force to penetrate a certain depth is proportional to square root of the chip diameter. 2. For Sanjome andesite and Kimachi sandstone, penetration depth approximately follows an equation with three constants ‹a’, ‹n’ and ‹c’; (depth)=a(force)/(chip diameter)0.5-b(spacing)sn-c, where ‹n’ takes a value between 1.5～2.0. 3. For Inada granite, penetration depth follows and equation; (depth)=a(force)/{(chip diameter)0.5(spacing)0.5}-c.