Study And Application Of High Strength Anchor Mesh Support Technology For Pre Excavated Trough(Drainage Tunnel) Along Goaf

In this paper, 1301 drainage lane in Pengzhuang coal mine as engineering background, through the application of field investigation,analysis of physical and mechanical experiments, theoretical analysis,numerical analysis and field application of monitoring methods of roadway driving along goaf in deep mine composite anchor net support.From the first along the goaf surrounding rock deformation characteristics, the mechanical model of mining overburden structure area and empty roadway are analyzed, the decisive role of the stability of overlying rock fractured formation of triangle block structure on roadway stability, also analyzed the roadway deformation in the coal face in the mining process. The characteristics of the different stages;secondly, discusses the feasibility of small coal pillar along gob excavation, the principle to determine the reasonable width of coal pillar,as well as a comparison with other mining areas along goaf conditions,to determine the feasibility of 4.5m in small coal pillar roadway driving;third, the introduction of high prestressing support supporting technology of anchor bar, elaborated high prestressing supporting mechanism of bolt bolt pressure, pressure component of reasonable design, improve the bolting system supporting efficiency; fourth, roots According to the pressure of 1301 drainage roadway, and with the help of computer numerical simulation software, the theoretical calculation to determine the supporting scheme and supporting parameter; fifth, in order to ensure the 1301 drainage lane roof support bolt on trial is successful, the performance of the downhole testing system (anchor rod body, tray,screw, nut, resin) the overall performance is good, can meet the requirement of the roadway support.Finally the article analysis 1301 drainage lane overall supporting effect, through the observation on the top and bottom of the drainage lane and two for the displacement of surrounding rock roadway deformation can be obtained discharge within an acceptable range of science, to support the expected goal. The support schemes and support parameters is scientific and reasonable, is a good solution in Pengzhuang coal mine drainage lane safety support, reduce the coal production cost,improve the efficiency of coal production, but also for the adjacent mining area and similar mine support provide a way of thinking.