Abstract:

Currently, coal roadway are often supported by steel support structures. This type of roadway is usually excavated in conditions where the coal is soft and affected by pressure of coal mined work, so if the support is not secure, the phenomenon of compression, distortion, settlement, and area reduction often occurs. Therefore, it is necessary to research and apply appropriate types of supporting structures to ensure stability of the roadway during excavation as well as during use. One of the types of supporting structures that can meet the requirements of the roadway along the coal seam is combination of rock bolt and steel support supporting structure. The article is based on the geotechnical conditions of the roadway along the coal seam 10 level -80 Mao Khe Coal Company - TKV with an excavation cross section of 8,4m2, then we have built a numerical model and calculated and selected the supporting structure for roadway is a composite supporting structure with parameters including SVP-22 steel arch support with distance of 500 mm/frame combined with 8 anchors with a diameter of 20 mm with distance between anchors of 1400*700 mm and 2 cable anchor with diameter of 17, 8 mm length 6300 mm. The research results are reference documents for selecting the supporting structure of the coal roadway.