TOOL FORCES AND SPECIFIC ENERGY PREDICTION MODELS IN THE PROCESS OF SANDSTONES CUTTING BY USING CONICAL PICKS

Year 2018, Volume: 57 Issue: 1, 5 - 14, 01.03.2018

Xiang Wang Qing-feng Wang Okan Su

https://doi.org/10.30797/madencilik.422814

Abstract

In this study, unrelieved rock cutting experiments were conducted at the linear rock cutting
machine and the characteristics of tool forces were discussed. The correlations among tool
forces, specific energy, cutting depth, and rock strength were analyzed using single factor
regression analysis method. Based on multiple non-linear regression method, the models of
tool forces and specific energy were developed considering the rock strength and cutting depth.
The results indicate that models of tool forces have the superior performance. When the model
of specific energy is analyzed using the compressive strength of the rock, it was seen that the
correlations are weak compared to the model related to tensile strength of rock. In conclusion, it
is emphasized that the proposed models presented in this study are particularly recommended
for performance prediction of soft and medium-hard strength sandstones in case conical picks
are employed.

Keywords

Conical pick, Rock cutting, Tool forces, Specific energy, Regression analysis

KALEM UÇLU KESKİLERLE KUMTAŞI KAZISINDA KESKİ KUVVETLERİ VE SPESİFİK ENERJİ TAHMİN MODELLERİ

Abstract

Bu çalışmada, doğrusal kesme setinde bağımsız kesme deneyleri yapılmış ve buna göre keski
kuvvetlerinin karakteristiği tartışılmıştır. Tek faktörlü regresyon analiz yöntemi kullanılarak keski
kuvvetleri, spesifik enerji, kesme derinliği ve kayacın dayanımı arasındaki ilişkiler analiz edilmiştir.
Ayrıca, kayacın dayanımı ve kesme derinliği göz önüne alınarak doğrusal olmayan çoklu
regresyon yöntemiyle keski kuvvetleri ve spesifik enerji modelleri geliştirilmiştir. Sonuçlar, kesme
ve normal kuvvetleriyle ilgili tüm modellerin oldukça üstün olduğunu göstermiştir. Spesifik enerji
ile basınç dayanımına bağlı olarak model kurulduğunda ilişki katsayılarının çekme dayanımına
göre zayıf olduğu belirlenmiştir. Sonuç olarak, bu çalışmada sunulan modellerin yumuşak ve ortasert
dayanımdaki kumtaşının kalem uçlu keski kullanılarak kazılması durumunda kullanımının
önerilebileceği vurgulanmıştır.

Keywords

Konik keski, Kayaç kazısı, Keski kuvvetleri, Spesifik enerji, Regresyon analizi

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