在采石场和露天煤矿,表土剥离和陶筑挡土墙的初期是产生噪声最大的作业之一。推土机和铲运机作业时,产生的噪声在距作业点10米处达90分贝(A)以上。一旦表土剥离完,就要用索斗铲、正铲和自卸汽车铲运废石。自卸汽车满载上坡运输时,在距离10米处测得的噪声级高于95分贝(A)。索斗铲和正铲产生的噪声比汽车的小,但其铲 In quarries and opencast mines, the initial stage of topsoil strippers and pottery retaining walls is one of the most noisy jobs. Bulldozer and scraper operation, the noise generated at 10 meters away from the operating point of 90 decibels (A) above. Once the topsoil is peeled off, scrap shovels, shovels and dump trucks are used to scoop up the waste rock. When dump trucks were loaded uphill, the noise level measured at a distance of 10 meters was higher than 95 dB (A). Cable draglines and shovels produce less noise than cars, but their shovels