... material parameters, the distribution of potential cracks and the failure criteria for the real and potential joints. Finally, two sets of numerical analyses are made to verify its effectiveness in approximately simulating continuum and the cracking process. 1 INTRODUCTION After the excavation of roadways...

... of surrounding rock stress and deformation in test roadways with different coal pillar width (10 m & 20 m) before and after the mining-induced influence by the workface. Combination of the above theoretical calculations, simulation and underground test results are considered to determine a reasonable width scope...

... Abstract To evaluate the surrounding rock stability in steeply dipping seams, based on the detection technology of soundwave and electromagnetic wave, the quality of surrounding rock and separation area location for roadway are identified. The degree of fracture for the inner wall of holes...

... roadway workface thick coal seam ISRM-Sponsored International Symposium on Rock Mechanics: Rock Characterisation, Modelling and Engineering Design Methods 1 RACT Application of segment pre-blasting of 52m sublevel caving of steep and thick coal seam under complex conditions S. J. Miao & M. F. Cai...

... mining areas. Based on the field data, the stress variation law with buried depth, and the relation between the specific values of the mean horizontal principal stresses to the vertical stresses and buried depth were analyzed. The in-situ stress measurement results were applied in roadway supporting...