Penetration Test with Worn Button Bits for Rock Drilling.
Penetration Test with Worn Button Bits for Rock Drilling.
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使用磨损的钮扣钻头进行岩石钻探的渗透测试。
DOI：
10.2473/shigentosozai.113.663
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Masao Akiyama
中科院分区：
文献类型：
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作者：
S. Okubo;A. Ota;T. Matsuda;K. Fukui;Masao Akiyama
目前，纽扣钻头广泛应用于岩石钻探。制造商已经花费了相当大的努力来提高纽扣钻头的性能和耐用性。然而，大多数试验都是在试错的基础上进行的，这主要是因为凿岩过程中的高水平加速度和振动阻碍了对纽扣钻头性能的准确传感和基础数据的收集。以桑霍姆安山岩为试块进行了初步试验，然后用1个新钻头和3个磨损钻头对尼哈里砂岩进行了试验。测试结果如下：1.穿透率随切屑高度的降低呈线性下降。加载段和卸载段的穿透曲线斜率均随切屑高度损失呈线性增加。比能量，或单位开挖体积所需的能量，也随着面片高度的损失而线性增加。边屑的高度损失和厚度损失之间也存在线性关系。例如，渗透率与侧面芯片的高度损失/厚度损失成线性关系。
Right now button bits are widely used in rock drilling. Considerable effort has been expended by manufactures to increase performance and durability of the button bits. However, most of them were conducted on try and error basis mainly because high level acceleration and vibration in rock drilling prevented accurate sensing and fundamental data collection concerning button bit performance.In this study, static penetration testing was carried out to clarify the performance of worn bits. Preliminary test was conducted on Sanjome andesite as a sample rock, and then Niihari sandstone was tested with one new bit and three worn bits. The testing results can be summarized as follows;1. Penetration rate decreases linearly with height loss of face chips. Slopes of penetration curve both inloading and unloading portions linearly increase with height loss of face chips. Specific energy, or energy required for unit excavated volume, also linearly increases with height loss of face chips.2. Linear relations also exist against height loss and gauge loss of side chips. For example, penetration rate decreases linearly with height loss/gauge loss of side chips.