The Study Of Mechanical Properties Of Rock Parameters In The Deep

With the increase of mining depth, deep encounter more complexengineering mechanics problems that are difficult to resolve with shallowrock mechanics, such as repetitive roadway collapsed, the groundtemperature rises, rocks rheology and rock explosion and so on. Thus,deep rock mechanics exploitation of mineral resources has become thefocus of research scholars[46-57]. In this pape, conduct research in deeprock mechanics parameter characteristics,as follows:(1)Deep rock mechanics parameters on-site investigation and testing.Including on-site engineering geological survey, RQD value statistics,deep roadway rock acoustic testing, on-site point load strength tests situstress test parameters.(2)Deep indoor rock mechanics experiments. It is including:uniaxialtensile uniaxial compressive strength test, rock density, triaxialcompressive strength test, rock longitudinal wave velocity test.(3)In order to stress Sheory-FLAC3Dmodel simulation. Measuredvalue by combining theoretical and FLAC3Dfault simulation to analyzethe results of ground stress to study the effects of faults on thedistribution of stress field.(4)Rock point load strength characterization. Correlation analysis ofrock point load strength and uniaxial compressive strength and uniaxialtensile strength.(5)The characteristics of rock acoustic analysis. The study on therelationship between acoustic velocity and the scope of Loose Circle ofRoadway Surrounding Rock have provide guidance to support.Through study on characteristics deep well rock mechanicsparameters, the following results are obtained: (1)The integrity of the mining area of deep rock mass was poor.(2)The mining area of deep ground stress value is higher. The largestvalue is45.95MPa. A maximum of the results of numerical simulation is46.6MPa. The distribution of faults on ground stress field has a greatinfluence. Ground stress have been released in near fault, leading to alower near fault ground stress value.(3)The relationship of point load strength and uniaxial compressivestrength and uniaxial tensile strength has been built. It is including:between the uniaxial compressive strength and point load strength thecorrelation of the conversion coefficient K of the main range of17.66~17.66, between the uniaxial compressive strength and point loadstrength the correlation of the conversion factor Kt mainly in the range of1.09~1.31. though this way wo can set up on-site rapid test point loadstrength and indirect gain deep rock uniaxial compressive strength anduniaxial tensile strength method.(4)The relationship of rock acoustic wave velocity value andsurrounding rock loose circle could be used by means of mathematical. Itis Logistic model:y=6.001+15.13e2.87x, Standard deviations and correlationcoefficients are0.2200416and0.9946718,respectively.(5)Rock deformation and damage characteristics is different fromdeep rock and shallow. Deep residual strength after rock peak thanshallow rocks is more obvious.