Study On Control Technology And Breaking Migration Rule Of Floor Heave Rock Mass In Deep Roadway

According to field investigation, the phenomen of floor heave often takes place indeep roadway as it’s being used or advanced, and lead to many security risks in fieldconstruction. Using synthesis research method, such as the field survey, theoreticalanalysis, numerical modeling, and field industry application, the article precededsystematic study, combining on control technology and breaking migration rule of floorrock mass in deep roadway. Firstly, floor heave is divided into mechanics, physicochemical and compound floor heave according to the breaking pattern of floor rockmass, and analyse their characteristics one by one. Secondly, the mechanical model ofslipping floor heave is builded according to the Rankine’s earth pressure theory, basedon these models, came at breaking depth and minimum supporting load of floor,according to these formulas, analyse the breaking depth of floor and difficulty value ofcontroling floor heave, based on these conclusions and combine the stressingcharacteristic of floor rock mass, analyse the migration path of floor rock mass, suggestthat the slipping control measures of floor rock mass according to the mechanism ofbolt. Finally, analyse the stress and displacement characteristics of floor rock mass usingfinite difference software to different depth, coefficient of horizontal pressure floor andthe consequence of rock’s migration path to different coefficient of horizontalpressure,discuss on the influence of floor’s, roof’s and both sides’ elastic modulus andfloor heave plenty,based on these, analyse the plenty of floor heave to differentgrappling parameters and came out the floor grappling parameters to the sure geologicalconditions. Research results were applied to practice and achieved good effects.