Application of Roof Cutting and Pressure Relieving by Deep-hole Presplitting Blasting in Control of Roadway Surrounding Rock
The mining face is subjected to a variety of stress superposition,leading to serious deformation of the roadway in the advance support section.Although a variety of support methods were adopted in the roadway,the roadway still deformed,and the roadway continued to deform after the second bottom cut,restricting the advance of the mining face.In order to cut off the stress transfer in the upper level of the triangle area of the working face and form high stress by the superposition of the side abutment pressure in the adjacent working face,and weaken the violent ground pressure appearance during mining,the technology of roof cutting and pressure relieving by deep-hole presplitting blasting was studied,the layout of the holes and the blasting technology were designed,and the effect of roof cutting and pressure relieving was evaluated.The application of roof cutting and pressure relieving by deep-hole presplitting blasting has achieved the purpose of controlling the deformation of the surrounding rock of the mining roadway,which can provide certain reference for similar projects.
surrounding rock deformationroof cutting and pressure relievingsurrounding rock control
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