摘要
针对31507回风巷为沿空巷道受到围岩应力集中、围岩承载能力较差以及原有支护参数设计不合理等因素影响,巷道在已掘进段巷帮、顶板出现较为明显变形,给巷道后续使用带来一定影响的问题,对巷道支护参数进行改进设计,通过强化顶板、巷帮以及帮角岩层支护强度来控制沿空巷道围岩变形。现场应用后,沿空巷道顶板、实体煤帮、窄煤柱帮变形量分别控制在合理范围以内,取得了较好的围岩控制效果。
In view of the problem that 31507 return air roadway is a gob side roadway,which is affected by factors such as stress concentration of surrounding rock,poor bearing capacity of surrounding rock and unreasonable design of original support parameters,the roadway side and roof have obvious deformation in the excavated section,which has a certain impact on the subsequent use of the roadway,the roadway support parameters are improved and designed by strengthening the roof.The surrounding rock deformation of gob side roadway is controlled by the support strength of roadway slope and slope angle rock.After field application,the deformation of roof,solid coal wall and narrow coal pillar wall of gob roadway are controlled within reasonable level,and good surrounding rock control effect is achieved.
作者
许峰
Xu Feng(Xiaoyi Coal Mine Management Branch of Shanxi Fenxi Mining Group,Xiaoyi Shanxi 032300)
出处
《机械管理开发》
2021年第10期186-188,共3页
Mechanical Management and Development
关键词
综放开采
厚煤层
沿空巷道
围岩支护
窄煤柱
fully mechanized top coal caving mining
thick coal seam
goaf roadway
surrounding rock support
narrow coal pillar
