双回撤通道冲击地压防治技术研究与应用

doi:10.11799/ce202203014

Abstract

Abstract: In view of the deformation and failure of the withdrawal channel of the rock burst mine, the influence on the withdrawal roadway in the mining process of the working face is analyzed, and the change of the support pressure in the double withdrawal channel is analyzed combined with the field data, Formulate targeted prevention and control measures and analyze the effect. The results show that the deformation and failure of the withdrawal roadway are affected by the mining of the working face. When the remaining length of the working face is closer to the main withdrawal channel, the greater the bearing pressure of the withdrawal channel and the more concentrated the pressure on the two sides of the roadway, the more prone the roadway to deformation and failure. Based on the characteristics of easy deformation and damage of the main withdrawal channel, the effect of roof presplitting blasting is analyzed. After presplitting blasting, the range of stress variation in the blasting area is significantly reduced, indicating that roof presplitting blasting can reduce the stress concentration of the withdrawal channel affected by the mining of the working face. At the same time, it also blocks the stress transmission path in the goaf and weakens the transmission path of advance bearing pressure in the working face.

CLC Number:

TD325

References

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Research and application of rock burst prevention technology with double withdrawal channels

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