Abstract:
Full section boring machines (TBMs) are gradually being used in coal mine rock tunneling, but the lack of adaptability in the design of TBM models has become the main reason affecting the efficiency of TBM tunneling in coal mine rock tunneling. By comparing and analyzing the routinely used tunneling technology and TBM tunneling technology in coal mine roadways, it is concluded that the differentiation and special needs of the roadway surrounding rock conditions must be considered when TBM is applied to coal mine roadway tunneling. The design of coal mine TBM is based on the characteristics of the model and the construction conditions of the coal mine rock tunnel. The unique “V-propulsion” system has been developed to meet the construction challenges of coal mine rock tunneling, enabling the construction of small turning radii in the tunnel. Adopt the “Per- detection” technology with TBM to make advance geological prediction, strengthen the initial support capacity of TBM, enhance the ability to get out of the trap and other designs to deal with bad strata; based on the “drainage + water plugging” treatment idea, form the TBM tunneling roadway of advance slurry plugging method of anti-burst water technology. By means of a real-time gas monitoring system in the TBM cutter and shield, we have developed gas protrusion prevention technology for TBM roadways; we have carried out targeted design for TBM key component cooling and cutter spray ventilation under high ground temperature construction environment. The innovative technology has been successfully applied in such mines as “Guizhou Guineng Juxin Coal Mine”, “Four Seasons Spring Coal Mine”, “Ping Coal Group Shoushan No. 1 Mine” and “Shanxi Huiyuan Coal Mine”. With the more complex and severe working conditions faced by coal mining in the future, mining TBMs will continue to develop and explore towards strong mobility, geological adaptability, support diversity, design serialization, industry standardization, and intelligent tunneling system.