Abstract
In view of the supporting problems in the large-section weak- and thick-coal open-cutting roadway in the deep coal mines, this paper adopts numerical simulation, theoretical analysis, and field measurement to study the deformation and failure law of the surrounding rock and explore corresponding control measures. The results show that: 1) The surrounding rock of open-cutting roadways is divided into a fracture-through zone, a fracture development zone, and a micro-fracture zone. When the width of the roadway is 12 m, the maximum height of the fracture-through zone is 2.6 m, and the two-side fracture zone is 1.1 m, and the height of fracture-through zone of the top plate is 1.5 m. 2) Considering the actual geological production conditions, this paper proposes the control measures combining high-strength bolt support, large-diameter anchor cable support, and single column reinforcement, and expounds its control mechanism. In addition, on-site industrial test verifies the rationality of the supporting plan.
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