Research On Rockmass Stability Control And Hybrid Support For High Stress And Complex Rockmass In A Deep Mine

With increase of mining depth, a series of engineering catastrophes such as coal and gas burst, collapse of roof strata and water burst from floor strata are getting more and more frequent. Shizuishan Coal Mine is one of the deepest and most complex geologic environments in western China, and it has coal and rock burst prone, where stress distribution or pressure change and rock mass deformation seriously, excavation disturbing caused rockmass support difficultly.All of these constrained and influenced safety in production.This paper aims the stability of the transporting-roadway locating 38 panel 600m level.In terms of some effective approaches, field investigation, laboratory experiment, numerical computation,etc., the research on stability and control way had been performed successfully. Fistly,comprehensive field investigation to engineering and geological characters and analysis.Then, utilizing some advanced apparatus and devices, high-level laboratory experiment on micro-structure, composited characteristics and mechanical properties of sandstone, mudstone had been performed. In addition,hybrid detection including tectonic abnormity,water-burst of fault, the observation on deformation of across-section, pressure monitoring, etc, in mining for rockburst risk assessment, the prone of dynaical hazard likelihoodly would be prevent. Furthermore, some important regularities have been succeeded.Finally,the bolt-net-injection reinforcement scheme and technical way,and corresponding reasonable parameters are confirmed and fulfilled the trial in the field。...