| Rapid excavation of large mining height face is an important guarantee for the efficient and safe coal mining. Based on the rock mechanical properties testing, stress test, numerical simulation analysis and research monitoring at workplace, we research mining height face Roof deformation and failure mechanism, proposing roadway basic roof triangular block structure and the determination of instability large mining law, providing a criterion for the narrow coal pillar of the roadway driving along the goaf,having analysis of high dynamic pressure roadway surrounding rock crushing mechanism, revealing the large deformation of gob-side in integrated mining in the recovery period is a structural effect, the combined support of the high-water rapid hardening materials grouting and high-strength pre-stressed anchor to control the deformation of the surrounding rock, and getting the good responds. Both gray theory and neutron system algorithm have been applied to optimize rapid excavation plan and rapid excavation process, respectively, to maximize the parallel operation of multiple processes, so that the face tunnelling processes to achieve the best match. Since former supporting the transformation of EBJ-120development machine we developed a new scalable three-dimensional excavation and bolt machine, on the spatial arrangement of the bolt rig and development machine, using two telescopic devices to interfere with each other but also complement each other to complete the parallel job, degrees of freedom of three-dimensional anchor drill two bolt rig can move back and forth, traverse the level, move up and down, rotate, tilt, can be multi-faceted, multi-angle of the tunnel roof and the side to help anchor drilling operations. Realize the comprehensive mechanization of excavation and bolt combine as one, the supporting rate and improve the ability and validity of the tunneling equipment, provided a strong guarantee for the realization of the goal of rapid excavation. |
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