Based on the hard roof rock and the overhanging of the roof of the goaf along the empty roadway, the pressure increased and the roadway seriously deformed. By adopting the hydraulic fracturing technology, the side roof of the goaf of the roadway fractured to form a crack, and the roof formed. Measures to break along the slit and reduce the length of the suspension were made. Practice showed that the stress of the fracturing section was about 7 MPa lower than that of the non-fracturing section, the pressure reduced by about 20%, and the deformation of the roadway reduced by about 50%, which effectively solved the ceiling of the roof and reduced the pressure of the wall of the roadway and roadway deformation ensured the maintenance and stability of the roadway along the empty roadway.
郭俊良. 水力压裂切顶卸压技术在沿空巷道中的应用[J]. 煤炭与化工, 2019, 42(1): 47-49.
Guo Junliang. Application of hydraulic fracturing and cutting top pressure relief technology in the roadway along the goaf. CCI, 2019, 42(1): 47-49.