The Stressed State Simulation of the Fixed Stepping Stoppers for the Auger Machine’s Cyclic Feeding Mechanism

The article explains the importance of auger technology in mining and underground building. The contribution of the Siberian region to the development of methods for sinking of the horizontal and slightly deviated holes is noted. The modern problems facing the developers of auger complexes are formulated. The prerequisites, methods and results of studies conducted at the Kuzbass State Technical University (KuzSTU) are given. The result of it is the possibility of flexible refinement of the complex’s configuration for specific boring conditions with the verification of each applied technical solution by computer simulation. Design changes are outlined, the consequences of which can be taken into account in the near future for the auger complex’s development.

Cyclic feeding of low and high protein diets reduces production cost of Labeo rohita (Hamilton, 1822)

Eighty four days feeding trial (3 feeding cycle ; each cycle of 28 days comprising 21 days with low protein and 7 days with normal or high protein diets) was conducted with Labeo rohita fingerlings to investigate the growth performance. Four diets; D1 (10% CP); D2 (30% CP); D3 (35% CP) and D4 (40% CP) were prepared. A total of 225 fingerlings were distributed randomly into five treatments in triplicates. T1 and T2 groups were fed with D1 and D2 diets respectively throughout the experimental period. The feeding cycle of 28 days consisted of 21 days feeding with D1 and 7 days with D2 (T3); D3 (T4) or D4 (T5). Higher growth rate in terms of specific growth rate, feed conversion ratio and apparent net protein utilisation were found in T2 and T3 group compared to T4 and T5. However, protein efficiency ratio of T3 group was significantly higher than the T2 group (p<0.05). Highest and lowest content of protein and lipid was observed in T2 group, whereas, the ash content was highest in T1 group. Feeding cost wasconsiderably reduced with T3 group of low protein intake (43.63%) registering 20.17% saving in production cost. The results indicate that fish fed with cyclic feeding schedule of 21 days with D1 (10% CP) followed by 7 days with a normal diet, D2 (30% CP) could reduce the production cost with considerable savings in feed cost.