当前位置: X-MOL 学术Min. Metall. Explor. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Estimation of Specific Energy and Evaluation of Roadheader Performance Using Rock Properties and Bond Work Index
Mining, Metallurgy & Exploration ( IF 1.9 ) Pub Date : 2021-07-28 , DOI: 10.1007/s42461-021-00454-3
Hakan Özşen 1 , Ali Aras 1 , Arif Emre Dursun 2
Affiliation  

Specific energy (SE) is defined as the amount of work required to cut a unit volume of rock and is used to estimate the performance of excavation machines. Generally, the SE value is produced from full-scale or small-scale rock cutting tests. However, these tests require expensive equipment and experienced personnel, and the testing procedure is time consuming and impractical. Therefore, for estimation of SE, this study aimed to find a solution to estimate SE using rock mechanics test results and Bond work index values (BWi), which can be produced in a more practical, less time-consuming manner and with inexpensive test equipment. Small-scale rock cutting, rock mechanics and Bond work index tests were carried out on seven rock samples, which can be grouped into two different type of rocks: marble and travertine. In addition, the instantaneous cutting rates (ICR) of a selected roadheader were calculated using SE values. Rock mechanics tests performed in this study were uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), ultrasonic velocity (Vp), Schmidt rebound hardness (RL), corrected point load index (Is(50)) and density (ρ). The simple regression method was used to estimate SE from rock properties and BWi. As a result of this simple regression, a significant and highest correlation was found between SE vs. UCS and Is(50). A good correlation was found between SE vs. BTS, RL and BWi values. A moderate correlation was found between SE vs. Vp and ρ.



中文翻译:

利用岩石特性和粘结功指数估算比能和掘进机性能评价

比能 ( SE ) 定义为切割单位体积岩石所需的工作量,用于估计挖掘机的性能。通常,SE值是从全尺寸或小尺寸岩石切割试验中产生的。然而,这些测试需要昂贵的设备和有经验的人员,并且测试程序耗时且不切实际。因此,对于SE 的估计,本研究旨在找到一种使用岩石力学测试结果和键合功指数值 ( BW i)来估计SE的解决方案),它可以以更实用、更省时的方式和廉价的测试设备生产。对七个岩石样本进行了小规模岩石切割、岩石力学和邦德功指数测试,这些岩石样本可分为两种不同类型的岩石:大理石和石灰华。此外,选定掘进机的瞬时切削率 ( ICR ) 是使用SE值计算的。岩石力学测试在本研究中进行了单轴抗压强度(UCS),巴西拉伸强度(BTS),超声波速度(V p),施密特反弹硬度(ř大号),校正点负荷指数(S(50)) 和密度 ( ρ )。使用简单回归方法根据岩石特性和BW i估计SE。作为这个简单回归的结果,在SEUCSI s(50)之间发现了显着且最高的相关性。一个良好的相关性之间找到SEBTS- [R大号BW值。在SEV pρ之间发现了中等相关性。

更新日期:2021-07-28
down
wechat
bug