The peculiarities of structurizing enclosing rock massif while developing a coal seam

[摘要] Different concepts of the development of geo-mechanical processes during longwall mining of a seam which are fundamentally different from the conventional ones are introduced in the article. Fundamental principles of the model for structurizing enclosing rock mass while longwall mining along the strike are described. The model was developed on the bases of non-linear geomechanical laws. According to the model, rock mass in the area of mining operation is organized as rock geomechanical layers with shifting arches. And the formation period of shifting arches in disintegrated rock mass is divisible by the length of the stope. Undulate characteristic of a massif as a peculiarity of man-made structurization of a massif is defined. It is shown that structuring the broken massif causes the formation of block-structured system and it can be detected while monitoring the ground pressure in powered support props. The results of the research allow decreasing the negative influence of a ground pressure and can be applied to specify parameters for controlling the roof, defining geometrical dimensions of a mining section and positioning of holing chute (face entry).

[发布机构] Institute of Coal of the Federal, Research Centre of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, 10 Leningradsky Prospect, Kemerovo; 650065, Russia^1

[效力级别] 地球科学

[关键词] Block structured;Enclosing rocks;Fundamental principles;Geometrical dimensions;Ground pressure;Mechanical process;Mining operations;Powered support