Research on Adaptability of CS and BT Hobs to Break Soft and Hard Rock

IF 1.9 4区工程技术 Q3 ENGINEERING, CIVIL

KSCE Journal of Civil Engineering Pub Date : 2024-08-06 DOI:10.1007/s12205-024-2753-1

Xuhui Zhang, Kang Long, TaoTan, Yashi Liao, Jianfang Li, Jingping Liao

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引用次数: 0

Abstract

To study the breaking differences between CS hob and BT hob under hard rock (rust rock) and soft rock (red sandstone), and reveal their adaptability in the two rock formations, the vertical breaking experiments of two hobs are conducted. Then, the rock breaking load, rock breaking difficulty coefficient, and rock breaking efficiency of the two hobs in different hob spacings are analyzed and discussed. The result denotes that the CS hob has a greater rock breaking load and rock breaking difficulty compared to the BT hob. Meanwhile, when the breaking object changes from hard rock (rust rock) to soft rock (red sandstone), both types of hobs’ rock breaking loads decrease, but the CS hob’s decrease is significantly greater than the BT hob’s. Meanwhile, the optimal hob spacing for the CS hob increases from 40 mm to 50 mm, whereas for the BT hob, it remains at 30 mm. Considering the rock breaking load and rock breaking efficiency of the hobs together, the CS hob is found to be more suitable for soft rock formation, while the BT hob is more suitable for hard rock formation.

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CS 和 BT 滚刀破碎软硬岩石的适应性研究

为了研究 CS 滚刀和 BT 滚刀在硬岩（铁锈岩）和软岩（红砂岩）下的破岩差异，揭示其在两种岩层中的适应性，进行了两种滚刀的垂直破岩实验。然后，对不同滚刀间距下两种滚刀的破岩载荷、破岩难度系数和破岩效率进行了分析和讨论。结果表明，与 BT 滚刀相比，CS 滚刀具有更大的破岩载荷和破岩难度。同时，当破碎对象从硬岩（锈岩）变为软岩（红砂岩）时，两种滚刀的破岩负荷都会下降，但 CS 滚刀的下降幅度明显大于 BT 滚刀。同时，CS 滚刀的最佳滚刀间距从 40 毫米增加到 50 毫米，而 BT 滚刀的最佳滚刀间距仍为 30 毫米。综合考虑滚刀的破岩载荷和破岩效率，CS 滚刀更适用于软岩地层，而 BT 滚刀更适用于硬岩地层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

KSCE Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

4.00

自引率

9.10%

发文量

329

审稿时长

4.8 months

期刊介绍： The KSCE Journal of Civil Engineering is a technical bimonthly journal of the Korean Society of Civil Engineers. The journal reports original study results (both academic and practical) on past practices and present information in all civil engineering fields. The journal publishes original papers within the broad field of civil engineering, which includes, but are not limited to, the following: coastal and harbor engineering, construction management, environmental engineering, geotechnical engineering, highway engineering, hydraulic engineering, information technology, nuclear power engineering, railroad engineering, structural engineering, surveying and geo-spatial engineering, transportation engineering, tunnel engineering, and water resources and hydrologic engineering