Abstract: A blast shield includes a blast resistant housing having a transmission wall which allows transmission of wireless signals therethrough. The shield is especially useful for withstanding external explosions, shock waves and thermal shock such as may occur during the collapse or explosions in underground mines, buildings or other environments while protecting internal components such as wireless transmitters and sensitive electronic equipment. The shield is also configured to prevent electrical arcing or explosions within the housing from escaping the housing and igniting flammable material external to the housing. A wireless transmission system using the blast shield and a method of use are also provided.