Study On Energy Dissipation Characteristics And Stability Control Technology Of Surrounding Rock In Deep Roadway

In the process of rock mass deformation,it always carried on the energy exchange with the outside world,and energy drived rock mass failure.Based on the theory of energy balance and finite difference.The methods of laboratory mechanics test,theoretical analysis,numerical simulation and field industrial test were comprehensively applied.The finite difference equation for rock mass energy calculation was derived.The finite difference program of energy calculation model was programmed by FISH language,and the FLAC^3D energy calculation model was developed.The energy dissipation characteristics and stability control technology of surrounding rock in deep roadway were systematically studied.The main research achievements include:(1)The samples energy evolution characteristics in different deformation stages were theoretically analyzed,and the conventional uniaxial and triaxial rock deformation processes were divided into linear accumulation stage,progressive dissipation stage,instantaneous release stage and continuous dissipation stage.The samples energy evolution characteristics under different confining pressures were calculated numerically,the rock deformation failure mechanism was revealed from the energy perspective,and the rationality of FLAC3D energy calculation model was verified.(2)Based on the energy dissipation theory.The roadway depth,lateral pressure coefficient and cross-section shape effected on energy dissipation and deformation failure of roadway surrounding rock were studied.This research had shown that the energy dissipation characteristics of deep roadway surrounding rock was mainly effected by stress environmental impact and the deeper the roadway,the more obvious the energy partition dissipation of surrounding rock.And the roadway cross-section shapes could adjust the energy dissipation region.(3)The rockbolt parameters effected on energy dissipation evolution and deformation failure of roadway surrounding rock were studied.This research had shown that the increase of rockbolt pretightening force,anchorage length and the decrease of the row spacing,the surrounding rock energy dissipation was reduced.This energy dissipation were mainly affected by rockbolt pretightening force and anchorage length.And proper bolt length could effectively controlled the energy dissipation of the surrounding rock.(4)The support technology and parameters of the test roadway were determined,and the field industrial test was carried out in the transportation roadway of Wuzhuang district,Sanhejian coal mine.From the perspective of energy dissipation,the energy dissipation characteristics and stability control technology of surrounding rock in deep roadway was studied,which provided a new basis for the prediction and stability control of deep roadway deformation.