Collaborative Control Technology and Practice of Supporting and Unloading in Dynamic Pressure Gob-side Roadway in Large Section Soft Coal Seam of Zhulinshan Coal Mine
Abstrac:The mining roadway of Zhulinshan coal mine adopts double roadway layout,which is excavated along the bottom plate,the coal seam joints and fissures are developed,and the overall strength is low.One of the roadways is a gob-side roadway.Under the influence of mining in this working face,the surrounding rock of the roadway has undergone significant deformation,which cannot meet the cross-sectional requirements of the next working face for mining.Therefore,it has to be expanded and repaired.This article analyzes the mechanism of large deformation of surrounding rock during the influence of mining on the 1406 transport roadway(gob-side roadway)of the mine.A collaborative control scheme for the support and unloading of the goaf dynamic pressure roadway in the large section loose and soft coal layer is proposed,with"high-strength threaded steel anchor rods,high-strength anchor cables,steel ladder beams,metal mesh,and hydraulic fracturing top unloading"as the core,and applied to the control of surrounding rock in the 1405 transport roadway.The on-site monitoring results of mine pressure in the roadway indicate that this plan can effectively control the deformation of the surrounding rock of the roadway and ensure the requirements of the roadway cross-section during the mining process.
Dynamic pressure gob-side roadwayHydraulic fracturingSurrounding rock controlSupport parameter
NETL
NSTL
万方数据
