In underground ore body mining, the mining method plays an important role in the stability of the stope structure and ground pressure control. This study provides a theoretical basis for ore body mining.
The area of the plastic zone in alternate mining is smaller to that in continuous mining. Results show that the surrounding rock at the corner of pillar 1 is damaged, the plastic zone decreases, and the minimum stress in each working procedure increases slightly.
Through numerical simulation and other technical means, a preliminary study on plastic and minimum stress changes during horizontal pillar mining, stress changes under different mining modes, and the effect comparison of full filling mining modes is conducted. Given the insufficient mining research data, this study establishes a 3D model by using the FLAC3D calculation program.
and Tu, H.The ore body has a great influence on the stability of surrounding rock and mining safety under different mining modes, and the reasonable selection of mining mode depends on other characteristics, such as ore structure surface feature, rock mass mechanical property, and ground stress distribution. Reference to this paper should be made as follows: Zhang, C., Tu, S., Zhang, L., Wang, F., Bai, Q. Keywords: permeability numerical simulation protective seam gas pressure gas seepage path. The simulated results provide the theoretical foundation for guiding the field practice and the field data analysis also confirm the correctness of the model. Based on the above information, the seepage of gas is analysed, seepage path of pressure-relief gas and the distribution of gas pressure in protected seam are obtained. Combined with the in situ conditions, the permeability changes in the process of protective seam mining are simulated by the modified models. Based on the current researches, the secondary development of flow model using FISH language is embedded in FLAC3D. The comprehensive study of gas permeability change rules and gas seepage rules of the protected seam close to the protective seam in the mining process of the protective seam need to be carried out. The protective seam mining has become one of the most important measures of preventing outburst hazard in the deep outburst coal seam. International Journal of Oil, Gas and Coal Technology Inderscience Publishers (2016) `The numerical simulation of permeability rules in protective seam
Zhang, Cun Tu, Shihao Zhang, Lei Wang, Fangtian Bai, Qingsheng Tu, Hongsheng The numerical simulation of permeability rules in protective seam mining The numerical simulation of permeability rules in protective seam mining