Optimization and engineering practice of roof strata behavior control technology in deep coal roadways

Addressing the challenge of controlling strong strata pressure behavior in deep coal roadways, this paper proposes an optimized scheme for roof strata pressure control technology, using the 211 working face of Huangling No. 2 Coal Mine as the engineering background. Its effectiveness is verified through field practice. By integrating technologies such as deep hole regional fracturing, hydraulic roof cutting for pressure relief, lateral roof cutting for pressure relief, and optimization of the roadway support system, effective control was achieved over the suspended roof behind the working face, lateral suspended roofs, and the caving zone in the goaf. Engineering practice demonstrates that the collaborative control strategy of "three pressure relief plus one support" successfully confined the surrounding rock deformation of the 211 tailgate within a safe range, significantly reducing the mining-induced impact on the roadway surrounding rock.