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煤矿中存在着许多噪声源,但最主要的是机电设备噪声。据调查,目前我国煤矿中广泛使用的凿岩机、风机、空压机等,其噪声级往往超过国家容许标准甚至达到110dBA。这样高的噪声级会给操作人员的身心健康造成直接的危害。特别是井下采掘,由于有限的作业空间,狭窄的巷道,各种设备产生的噪声会经多次反射而增强,使操作人员感受到的噪声级较地面为高。因此,超高的噪声级是目前煤矿环境中一个主要的问题。为了保护环境安宁和矿工健康,需要制
There are many sources of noise in coal mines, but the most important are mechanical and electrical equipment noise. According to the survey, at present, widely used rock drills, fans and air compressors in coal mines in China often exceed the national allowable standards and even reach 110 dBA. Such a high level of noise will be a direct harm to the operator’s physical and mental health. In particular, underground mining, due to limited work space, narrow tunnels, the noise generated by various devices will be enhanced by multiple reflections, so that the noise level perceived by the operator is higher than that of the ground. Therefore, the ultra-high noise level is a major issue in the current coal mine environment. In order to protect the environment and miners health, the need for system