STATISTIČKA ANALIZA UTJECAJA KONTROLIRANIH I NEKONTROLIRANIH PARAMETARA NA RAD DIJAMANTNOM ŽIČNOM PILOM, PRIKAZ SLUČAJA

Nowadays, most mining and quarrying industries utilize a diamond wire saw machine for bench cutting operations. This method uses a metal wire or cable assembled by diamond beads to cut the hard stone into large blocks. Many parameters classified into controllable and uncontrollable parameters affect the performance of the diamond wire saw cutting method. The uncontrollable parameters are related to rock engineering properties, and controllable parameters are related to operational aspects and machine performance. The diamond wire sawing process’s production rate is one of the most critical parameters influencing the design optimization and quarrying cost estimation. The cutting rate and wear rate of diamond beads are the most important factors to evaluate quarries’ production performance. This study aims to determine the effects of different controllable and uncontrollable parameters on different quarries’ production rates. Rock engineering properties like strength, hardness, and abrasivity, and operational aspects, such as cutting angle and drive wheel diameters, are considered as the main factors affecting the production performance of the diamond wire saw method. To discover the influence of these parameters, a detailed investigation in ten quarry operations was carried out. The relation between cutting rate and diamond bead wear with different parameters is estimated. It was observed that different controllable and uncontrollable parameters could increase or decrease the cutting rate and diamond bead wearing. Furthermore, using simple and multiple regression analysis, performance prediction of the cutting rate and wearing of diamond beads was developed, and the best equations were proposed.Danas se u najvećemu broju rudnika i kamenoloma upotrebljava dijamantna žična pila za razne operacije na čelima radilišta. Uporabom metalne žice (ili kabela) na koju su dodani dijamantni zupci mogu se rezati veliki blokovi arhitektonsko-građevnoga kamena. Pri tomu rezanje ovisi o nizu parametara od kojih se neki mogu, a neki ne mogu kontrolirati. Oni koji se ne mogu kontrolirati jesu inženjerska svojstva stijena, a oni koji se mogu kontrolirati jesu operativne varijable i svojstva stroja. Iznos rezanja/proizvodnje najkritičnija je varijabla prema utjecaju na iznos proizvodnje. Svojstva stijena kao čvrstoća, tvrdoća i abrazivnost te operativne vrijednosti poput kuta rezanja, promjera pogonskoga kotača najvažnije su varijable koje utječu na proizvodnju žičnih pila. Procijenjen je odnos između brzine rezanja i trošenja dijamantnih zubaca i opaženo je kako različite varijable utječu na povećanje ili smanjivanje iznosa proizvodnje. Analizirane su metodama jednostavne i višestruke regresije, uključivši sve spomenute varijable, te su predložene jednadžbe kojima se opisuju opažene pojave