High-stress carnallite ore bed roadway composite supporting structure and method

The invention relates to a high-stress carnallite ore bed roadway composite supporting structure and method, and belongs to the technical field of roadway supporting. The high-stress carnallite ore bed roadway composite supporting structure and method aim at solving the problem that the supporting capacity is insufficient when a carnallite ore bed roadway supporting structure encounters with highstress. According to the technical scheme, the supporting structure with anchor net spraying as an outer protective layer, a shrinkable U-shaped steel shed as a middle protective layer and concrete pouring as an inner protective layer is adopted; and the integrated composite supporting structure is formed by the outer protective layer, the middle protective layer and the inner protective layer, and efficient supporting of a high-stress carnallite ore bed roadway is achieved. The high-stress carnallite ore bed roadway composite supporting structure and method have the beneficial effects of being stable in structure, hi