Study on Control Technology of Surrounding Rock of Mining Roadway Affected by Strong Dynamic Pressure in End mining Stage of Working Face
Reasonable control parameters of roadway surrounding rock can effectively guarantee the stability of roadway surrounding rock in working face,which plays an important role in coal mine safety production and improving economic benefits.The 8103 working face of Yongdingzhuang Coal Industry Co.,Ltd.has difficulty in final mining due to the problem of rib spalling,and the adjacent 8102 working face may also experience this problem at the end of mining.In view of this,the numerical simulation method is used to compare the deformation of the surrounding rock of the roadway during the initial mining and final mining of the 8102 working face,and the grouting reinforcement scheme of the surrounding rock of the roadway at the end of the working face is formulated.After the field practice test,the displacement of the top and bottom plates of the roadway at the end of the mining period of the 8102 working face was 243 mm,and the displacement of the two sides was 368 mm;The separation amount of the deep base point of the roadway roof is 25 mm,and the separation amount of the shallow base point is 40 mm;the displacement of surrounding rock of roadway meets the requirements of safety regulations.
Coal mineMining roadwayGrouting reinforcementSurrounding rock control
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