Abstract
The stability of roadway is of great significance to mine safety production. In this paper, according to the geological conditions of Xinyu coal mine, the cross-section form of track roadway is optimized. Under the condition of the same ratio of height to width, rectangular section, circular arch section and straight wall semicircular arch section are designed respectively. FLAC3D is used to establish numerical model to simulate three kinds of section forms. The optimal section form is obtained by analyzing displacement field, plastic zone distribution and stress field. The results show that: (1) The cross-section form of coal mine roadway is an important factor affecting the stability of roadway. (2) Under the same ratio of height to width, the stability of roadway from high to low is straight wall semicircular arch, circular arch and rectangle. (3) The field test data show that the straight wall semicircular arch roadway has good engineering effect. (4) Comprehensive comparison shows that the straight wall semicircle arch is the best roadway section form. The research results can provide reference for the design of roadway section form in the future.
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