Abstract
Based on geological conditions of 3318 working face haulage roadway in Xuchang Coal Mine, as well as the space‐time relationship with surrounding gob, theoretical analysis and numerical simulation were used to study the influence of fault structure on the original rock stress of 3318 working face transport roadway. Considering the composite action of the leading supporting pressure of 3318 working face and the structure and the lateral supporting pressure of gob, the stress distribution and deformation law of roadway under the complex and high‐stress condition are studied. The results show that, under the superposition of lateral abutment pressure of goaf and abutment pressure of adjacent working face and fault structure, the peak stress of roadway roof and floor moves to the surface of roadway surrounding rock, and its distribution law changes from obvious symmetry to asymmetry; surrounding rock on both sides of roadway forms asymmetric circular concentrated stress area; roof and floor and two sides of roadway show asymmetric characteristics. This reveals the stability characteristics of roadway surrounding rock under the action of multiple perturbation stresses.
Highlights
Introduction e Xuchang Coal Mine has entered into the middle-post stage of life cycle: almost all the mining areas with simple geological conditions have been extracted, while the majority of the remaining mining areas are heavily influenced by geological structures, where the geological conditions of coal seams are complex and many geological structures such as faults are developed
After the structure of fault and the lateral abutment pressure exerted by adjacent working face became gradually stable, the roadway was excavated in the numerical model and the stress distribution
The stress peak shifted to the surrounding rock surface of the roadway and the stress distribution law changed from significant symmetry to asymmetrical feature
Summary
Numerical analysis are reduced according to the relevant formula. Table 1 shows the calculation parameters of surrounding rock mechanics after weakening according to the classification of engineering rock mass. Stress Distribution Law of Rock Mass near the Fault Area. Stress Distribution Laws of Near-Fault Roadway under the Influence of Lateral Abutment Pressure. After the structure of fault and the lateral abutment pressure exerted by adjacent working face became gradually stable, the roadway was excavated in the numerical model and the stress distribution
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