Noise propagation characteristics of underground equipment in coal mines  

作　　者：CHENG Gen-yin WEI Zhi-yong XU Ming ZHU Yan-yan 

机构地区：[1]North China Institute of Science and Technology,Sanhe 065201,China [2]Beijing Municipal Institute of Labour Protection,Beijing 100054,China

出　　处：《Journal of Coal Science & Engineering(China)》2012年第3期320-324,共5页煤炭学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （50974061）; the Natural Science Foundation of Hebei Province （E2009001420）

摘　　要：On the basis of the survey of underground noise in Jinggezhuang and Donghuantuo mines, Kailuan Group, noise radiation intensity, noise propagation properties and noise frequency-spectrum characteristics of underground equipment were studied at different work conditions. The result indicates that the noise source intensity surpasses the noise limit requirement of 85 dBA completely. Nearly 70% noise sources exceed the noise limit of 90 dBA, and some are over 100 dBA. Noise attenua- tion in semi-free field environment on the ground is significantly different from underground far-field environment of noise source in coal mines. Noise of these regions, where staffs are long and highly concentrated, exceeds 85 dBA, the basic noise limit. The noise frequency-spectrum presents the wideband characteristics. Especially in the main frequency of the language communication 500, 1 000 and 2 000 Hz, the octave band of noise performs obviously.

关 键 词：noise in coal mine noise propagation property noise frequency-spectrum characteristic 

分 类 号：TB56[交通运输工程—水声工程] TB53[理学—物理]