残采综放工作面过空巷围岩变形规律及关键技术研究

残采工作面会面临多层位多角度空巷进行回采，给工作面安全回采带来技术难题。以山西某矿6212残采综放工作面为背景，利用数值模拟分析了残采工作面过顶煤斜交空巷、底煤斜交空巷和交叉点围岩变形规律。模拟结果表明:至少应距离空巷25 m进行空巷加固措施，沿顶掘进的空巷底板塑性区发育明显，交叉点围岩应力集中程度高，应加强支护和管理。针对现场空巷的空间位置，提出了密集支柱或木垛、锚网索、超高水材料注浆预充填等过空巷关键支护技术，保证了残采工作面的安全回采。

Study on deformation law and key technology of surrounding rock for roadway passing through gob on fully-mechanized caving face with residual mining

The residual mining face will face multiple layers and multiple angles of empty lanes for recovery，which will bring technical difficulties to the safe recovery of the working face.Based on the 6212 residual fully-mechanized caving face of a coal mine in Shanxi Province，the deformation laws of oblique goaf，oblique goaf of floor coal and surrounding rock at intersection point of residual mining face are analyzed by numerical simulation.The simulation results show that the reinforcement measures should be taken at least 25 m away from the goaf.The plastic zone of the floor along the top of the goaf is obviously developed，and the stress concentration of the surrounding rock at the intersection point is high，so the supporting and management should be strengthened.According to the space position of the empty lane，the key supporting technology of dense pillar or wooden stack，anchor cable，super high water material pre-filling and so on is put forward to ensure the safety recovery of the residual mining face.