The Technology of Using Dual Wall Grouting Method to Deal With Air Leakage of Firewall

After the end of working face mining, the firewall that is built in the machine and wind two lanes will appears fissures constantly under the mine pressure by using the traditional method. It is difficult to eliminate air leakage completely although regular maintenance. The method of building two firewall, and between which are injected fly ash slurry, can effectively eliminate the air leakage of firewall.