Luciano José Minette

ANÁLISE TÉCNICA E ECONÔMICA DO FORWARDER EM TRÊS SUBSISTEMAS DE COLHEITA DE FLORESTAS DE EUCALIPTO 1

This work aimed to evaluate a forwarder, technically and economically, under three eucalyptus forest harvest subsystems. The technical analysis included a productivity and motion and time study. The economic analysis included the parameters operational cost, production cost and energy consumption. Loading consumed more than 80% of the total cycle time in the subsystems studied. The average travel distance influenced unloaded and loaded travel times. The forwarders operational cost was US

Análise de danos de colheita de madeira em floresta tropical úmida sob regime de manejo florestal sustentado na Amazônia ocidental

60.70/ha. The forwarder production costs were US

Avaliação dos níveis de ruído, luz e calor em máquinas de colheita florestal

1.74 , 1.53 and 2.51 /m 3cc, in subsystems 1, 2 and 3, respectively. The energy consumption rates were 2.76; 2.42 and 3.98 g/kW*m 3 cc, (FORMATAR )in subsystems 1, 2 and 3, respectively.

Avaliação antropométrica de trabalhadores em indústrias do polo moveleiro de Ubá, MG

The objective of this work was to identify, qualify and quantify the intensity of damage from natural causes and forest harvest in a non-exploited old growth forest (FPNE) and in a harvested old growth forest (FPE). The studied area is located in the counties of Manicore, Amazon, Brazil, with an area of 204 ha of FPNE and 202 ha of FPE, respectively. The inventory was carried out applying the randomized sampling method, in both areas. Sampling collection was carried out in two levels of approach. In level I, five plots of 100 x 100 m (1 ha) were established, and the individuals with DBH ³ 15 cm were evaluated. In level II, the plots of level I were systematically subdivided in subplots of 10 x 10 m (100 m2), being randomly sampled only five of these per plot of level I, with an area of 2,500 m2, where all the individuals between 5.0 £ DBH < 15 cm (large samplings) were evaluated. The assessment of damage caused to the remaining trees indicate that only 10% of the adult vegetation presented damages in the non-exploited forest. In the exploited forest, the damage caused by harvest operations, such as felling log extraction, skidding trails and clearcut, was of 29%. The changes in the structures of volume, basal area and diameter were more evident in the greater diameter classes, where reductions of 30%, 29% and 27%, occurred respectively. Nevertheless, this reduction can be considered normal, since the sampling was collected immediately after forest harvest operations.

Avaliação técnica e econômica do corte mecanizado de Pinus sp. com Harvester

This research was developed with data collected in areas of wood harvesting by three companies of the State of Minas Gerais, Brazil. The general objective was to evaluate the level of noise, light and heat of forest harvesting machines. The work stations of the following machines were evaluated: Feller-Buncher, Skidder, Bucking Tongs, Mechanical Bucking and Forest Loader. The noise levels were measured with the use of a dosimeter, the light with a digital luximeter and the heat exposure with the IBUTG. At company 1, the two evaluated forest tractors, while stopped, presented the same level of noise, both had internal lighting and good thermal conditions. At company 2, for the three evaluated machines, the level of noise was below the limits recommended by the NR 15. The cabins had internal light and thermal regulation. At company 3, all the machines showed noise levels above those allowed by the Brazilian legislation. The forest loader and the mini-skidder showed poor lighting and the indexes of effective temperature were outside the thermal comfort zone for all machines. It is concluded that all the machines used by company 3 are ergonomically non-complient.

Análise do desempenho da máquina 'slingshot' em subsistemas de colheita em florestas de eucalipto

O objetivo deste trabalho foi realizar o levantamento de variaveis antropometricas de trabalhadores de fabricas de moveis do setor moveleiro de Uba, Minas Gerais, para verificar a adequacao dos postos de trabalho. A populacao avaliada foi composta por 148 trabalhadores que exerciam a atividade de fabricacao de moveis de madeira, e os dados antropometricos foram obtidos atraves das medidas diretas do corpo do trabalhador na posicao em pe e analisados atraves do calculo de percentis. Os resultados indicaram que os coeficientes de variacao dos dados indicaram uma distribuicao homogenea de todos os valores encontrados, a excecao da variavel diâmetro de pega maxima, que apresentou media dispersao de distribuicao. As alturas das bancadas dos postos de trabalho avaliados se mantiveram, em media, 15,6 cm abaixo do recomendado, na maioria dos postos de trabalho; ja nos postos das linhas de pintura e embalagem essas alturas se encontravam, em media, 28,7 e 24,0 cm, respectivamente, acima do recomendado. Constatou-se que os dados antropometricos estudados apresentavam distribuicao homogenea para quase todas as variaveis encontradas, e todas as alturas dos postos de trabalho se apresentaram fora dos limites recomendados para o percentil 95%, forcando o trabalhador a adotar posturas inadequadas. Para os paineis de controle das linhas de pintura, a altura media encontrada foi de 175,0 cm, com 9,0 cm acima do percentil 95% (166,0 cm), para a variavel altura dos olhos, que determina a linha de visao para leitura dos paineis.

Ergonomic evaluation of the preparation of cuttings and minicuttings for eucalyptus seedling production, with the use of scissors

The present study evaluated the operation of the automated cutting of Pinus caribaea hondurensis, in system cut-to-length used Harvester, in the municipal district of Nova Ponte, MG, with base in the productivity and costs of the activity during the initial apprenticeship of its implantation (5 months), considering the multiple use of the wood. In the technical evaluation calculations were made: Operational income, productivity, mechanical readiness and operational efficiency, while in the economical evaluation it the operational cost and the production costs were calculated. The largest medium productivity was found for month 5 with 22.71m³.he -1 , the month that presented the second largest mechanical readiness (95.59%). The largest operational efficiency was found in month 3, at 83.09%. The total operational cost for the period sample of R

Avaliação da carga de trabalho físico exigido em operações de produção de mudas ornamentais no distrito federal: estudo de caso

115.03 per hour of work. The fixed costs corresponded to 28.59%, and it varied by 62.31% of the total costs. The production costs were R

Produtividade e custos de extração de madeira de eucalipto com Clambunk Skidder

5.99.m³ -1 produced. In the end productivity increased when the medium volume for trees increased, which the machine possesses a potential for improvement in this operation, and that its production cost is inside that of the expected patterns, for this study.

Ergonomic factors and production target evaluation in eucalyptus timber harvesting operations in mountainous terrains

This work had the objective to evaluate technically and economically a slingshot machine in different timber harvesting subsystems in eucalyptus forests. The analysis technique included productivity and a motion and time study. The economic analysis included the parameters- operational cost, production cost, and energy consumption rate. The element processing in subsystems 1 and 2 consumed more than half of the operational cycle time. In the subsystem 3, the elements searching and cutting trees and processing represented together about 75% of the total cycle time. The operational cost was US