Coal mining is an integrated trade which involves the geology, well ventilated, transportation, electricity and environmental protection and so on. The mining industry has labor intensity, bad work condition, many harm factors. Each kind of virulent noxious gas, coal dust, fire, electromechanical device are all immediate danger to operate personnel's safety and healthy. Well-balanced and suitable ventilation is the postulate to keep the health of underground worker and the safety of the production. We take air quantity of laneway as the research emphasis, considering the release of state regulations on coal min. We figure out the optimum area of air quantity via building the optimization programming model, and realize an actual case study to interpret the process of the probabilistic risk analysis PRA with statistic theory.
Nest Box (Birdhouse) Plans
Birdhouse and Nest Box Plans for Several Bird Species | The Birders Report
Thermal Work Limit TWL , now included in the AIOH Heat Stress Standard, is a rational heat stress index that calculates the "limiting" metabolic work rate that moderately fit and healthy, euhydrated, acclimatised persons can sustain in any given environment and takes into account all the relevant environmental factors air temperature, wind speed, radiant heat, relative humidity and barometric pressure , clothing insulation and vapour permeation and user-defined limits on allowable sweat rates and deep body core temperatures. TWL has become the de-facto standard in underground mines in Australia, probably the most adverse occupational setting for heat stress in Australia. However, it can easily be applied to sporting or other environments. Brake, Download Abstract as. Note that all the formulas for the original TWL formulation are avaialble in the paper "Limiting work rate Thermal Work Limit as an index of thermal stress" avaialble from the. There have been some changes to these formulas that mostly affect very hot dry environments but these are as yet unpublished. TWL can now be read directly by two commercial available instruments.
Show full item record. An improved energy management methodology for the mining industry. Levesque, Michelle. The focus for this work was the development of an improved energy management methodology tailored for the mining sector.
Construction ventilation system is divided into two stages based on completion status of shafts in the underground petroleum storage project in Jinzhou, China. With the help of theoretical analysis and numerical simulations by using FLUENT software, in the first stage, reasonable construction ventilation is designed and cases with different outside temperature are discussed to investigate the effect of ventilation performance. It is found that with temperature difference increases, peak value of CO concentration, exhausting time of dirty air and required time to meet the CO concentration qualification decrease, but the influence degree is quite limited. Gallery-type network ventilation technique GNVT refined from theories of operation ventilation for road tunnel and mining ventilation network, is proposed to conduct the second stage construction ventilation. It turns out that Axial-GNVT with shafts taking in fresh air and access tunnel ejecting dirty air has much better performance than traditional forced ventilation from access tunnel.