| This paper is based on mining conditions for1122(3) in ZhangJi colliery of Huainan Mining Industry (Group) co.LTD; it studied on surrounding rock control technology of roadway above hollow and Gob-side entry, by method of the engineering analogy, numerical simulation, theoretical analysis and field measurement.With FLAC software, this thesis analyzes surrounding rock stress field, displacement field and plastic zone changes of roadway above hollow and Gob-side entry. Based on analyzing the deformation characteristics of roadway under different conditions, put forward the corresponding anchor net supporting design parameters. Through the analysis of deformation characteristics of gob side pillar, Put forward adding anchor unequal strength support process to control local large deformation, and improving the mechanical properties of surrounding rock with grouting reinforcement technology, deformation of gob side pillar was effectively controlled. Put forward pressure observation scheme of roadway above hollow and Gob-side entry, by monitoring surface displacement of roadway, the amount of deep displacement and the roof separation of anchor net supporting roadway, it obtained mine pressure regularity of the anchor net supporting roadway.Through the field test, the results of this paper ensured that the coupling deformation of roadway was to meet the need of production; the research results have important reference value to the similar geological conditions of surrounding rock control, created obvious economic benefits for enterprises. |
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