The gas line that runs between the tank and the structure housing the gas appliances is the service piping, also known as the yard line. The propane yard line generally consists of copper tubing or plastic polyethylene piping. The service piping needs to be installed correctly and legally in c...
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diesel exhaust has strict requirements, generally specified carbon monoxide ≤30mg/m3, nitrogen oxide ≤8mg/m3. The main technical measures to reduce the harm of exhaust gas are strictly controlling the emission of harmful gas from diesel engine exhaust gas and setting up the exhaus...
With copper extraction expected to continue for many years, there will be significant environmental impacts from operations, including greenhouse gas (GHG) emissions due to high energy consumption and diesel fuel usage. The sustainability of future mining operations will be heavily dependent on the indu...
A 12-foot-diameter, 1,600-foot-deep vent shaft was completed by this method in 1969 at the White Pine Copper Mine in Michigan. Starting from a 10-inch pilot hole, it was enlarged in three downreaming passes. The introduction of a workable raise borer in the 1960s represented a break...
(FeSO4), copper sulphate (CuSO4), and sulfur in lignin (Fig.9). In the case of FeSO4(Fig.9A), isolates demonstrated colony formation under both aerobic and anaerobic conditions, although colony size was reduced under anaerobic conditions. Under aerobic conditions, all the isolates exhibited some...
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The monitoring system consisted of single end distributed fibre and ten FBG arrays encapsulated in the grooved copper sheet. Each FBG array monitored the surface strain from various points at tunnel circumference, as seen in Fig. 14. Another novel application of FOS in tunnel displacement monitoring...
[...]over the comparable period due to temporary operational issues at Cobar relating to an electrical line failure and delaystoundergroundbackfilling activities. glencore.com glencore.com 來自自有資源銅精礦產量較可比同期降低7%,乃由於與電線故障有關的Cobar臨時操作事故及填充採礦邊坡的工程延誤所致。
Gas-filled copper cableProactive maintenanceWe developed proactive maintenance technique for underground closures in gas-filled copper cable networks. Our proactive maintenance technique is proof against opening pinhole by external coating material on the seam-sealing part of the closure. The technique ...