Abstract A boom-type roadheader, a type of mechanical equipment used in the excavation of coal mines, has been used for the construction of a metro tunnel with complex cross-sections. The adaptability of this equipment directly depends on the mechanical behavior of surrounding rocks and the associated construction method. Practice has indicated that a boom-type roadheader is suitable for bench excavation without a temporary invert. The mechanical characteristics of surrounding rocks affecting the efficiency of such boom-type roadheaders include uniaxial compressive strength and fissure spacing of the rock mass. The adaptability of the boom-type roadheaders is divided into 3 classes based on these characteristics. The problem of dust generation in the tunneling process can be solved by changing ventilation modes. Primary support and mucking are additional factors affecting the efficiency of the boom-type roadheaders. A high-strength resin anchoring bolt system and continuous mucking system pair with the boom-type roadheader very well. Through an application analysis of boom-type roadheaders, the adaptability of boom-type roadheaders in metro tunnels with complex cross-sections is discussed. Factors and problems affecting the efficiency of boom-type roadheaders are highlighted.
Abstract：
A boom-type roadheader, a type of mechanical equipment used in the excavation of coal mines, has been used for the construction of a metro tunnel with complex cross-sections. The adaptability of this equipment directly depends on the mechanical behavior of surrounding rocks and the associated construction method. Practice has indicated that a boom-type roadheader is suitable for bench excavation without a temporary invert. The mechanical characteristics of surrounding rocks affecting the efficiency of such boom-type roadheaders include uniaxial compressive strength and fissure spacing of the rock mass. The adaptability of the boom-type roadheaders is divided into 3 classes based on these characteristics. The problem of dust generation in the tunneling process can be solved by changing ventilation modes. Primary support and mucking are additional factors affecting the efficiency of the boom-type roadheaders. A high-strength resin anchoring bolt system and continuous mucking system pair with the boom-type roadheader very well. Through an application analysis of boom-type roadheaders, the adaptability of boom-type roadheaders in metro tunnels with complex cross-sections is discussed. Factors and problems affecting the efficiency of boom-type roadheaders are highlighted.
QI Tai-Yue,
LI Bin
.Application of Boom-type Roadheader in a Metro Tunnel with Complex Cross-sections[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(4): 32-38
2011, Vol. 48 