There are four types of performance: constructive (in theory), technical, operational and regulatory design or theoretical - productivity per hour of continuous operation under design conditions: PK = 60 g n; (m3 / h) where: g - geometric capacity, m3; n-number of cycles per unit time (minute) at rated conditions. Technical performance - must meet specific operating conditions in the mine: Fri g = 60 kN n / KR; where: g - m3 bucket capacity; kH - filling ratio bucket; kp - the coefficient of loosening of the soil; n - the number of cycles per minute in a particular face, all quantities in the equation except for the geometric capacity of the bucket variables depending on soil conditions shape the face, qualified engineer. Operational performance - is called the average actual output (m3 / h), the excavator at work in specific circumstances, taking into account unavoidable downtime: Bae = lim kV = 60 g kN kV n / Rp where: kB - utilization of working time machine, which is the ratio of the net work to all expended; kH - filling ratio 0,8 - 1,5 in Depending on the type of soil, moisture content, the working equipment; kp - coefficient of loosening of 1,1 - 1,3; kV - utilization of working time 0,75 - 0,85. where: tts - the duration of one cycle, pp. In turn, tts tts = tk + tn + TV + tn where: tk - duration Digging (10 - 20s) tn - the duration of turn-off (4 - 6sek) TV - the duration of unloading (3 - 5s) tn - duration of rotation in the face (2 - 3s) standard performance - is the amount of work that needs to be performed using a machine at a time. At its core, it corresponds to the operational. The number of cycles in unit time (minute) depends on the design features of an excavator, soil conditions, shape the face.