| -iii-The damage and deformation characteristics of surrounding rock monitoredin deep soft rock roadway of Wanbei Qidong coal mine ?1051 fully mechanized coal mining face is set in the engineering geological in this thesis,in order to lucubrate the deformation and failure of the surrounding rock in the soft rock roadway of the Wanbei ?1051 fully mechanized coal mining face has been made the comprehensive research method combining theoretical analysis,numerical simulation,laboratory experiment and field experiment has been used.The stability analysis of surrounding rock of deep roadway is carried out,the mechanical model of surrounding rock of soft rock roadway is established,the stress and displacement distribution of the surrounding roadway are studied,the relationship between the deformation of the roadway and the power function is obtained,the physical and mechanical parameters of the surrounding rock of soft rock roadway are obtained by laboratory experiment;which reveals the deformation and failure characteristics of surrounding rock of deep soft rock roadway by using numerical simulation method,it has been verified and achieved good results.The main contributions of this thesis are summarized as follows.(1)On the basis of deep soft rock roadway in Qidong coal mine ?1051 fully mechanized coal face failure deformation law,based on the viscoelastic theory,a mechanical model for analysis of deep soft rock roadway surrounding rock stability of roadway surrounding rock,reveals the distribution of stress and displacement,the relationship between failure and time of surrounding rock obtained.(2)Through the field take on rock roadway roof strata of rock mechanics parameter determination,the second ?1051 roadway roof in a certain range of rock uniaxial compressive strength,tensile strength,elastic modulus and Poisson ratio and other parameters,for the realization of the control technology provides the basis for certain parameters of deep buried tunnel II1051.(3)Effect of II1051 tunnels by mining disturbance of deep roadway surrounding rock,internal local area shows the phenomenon of stress concentration,with the increase of time,peak stress and stress concentration willcontinue to increase,while the stress concentration coefficient increases,in this process,the stress in surrounding rock of roadway to the space transfer release in two sides of roadway area formation stress decreasing area,as time continues to increase,the rock tends to be stable(4)The surrounding rock of deep soft rock roadway with high stress and strong disturbance of deformation and deformation under the condition of large range,at the same time,along with the surrounding rock stress in a certain degree of release,the deformation of surrounding rock is more intense,the regional stability.(5)The roadway support system and construction process design,provide some reference for the similar geological conditions of the roadway,but also pave the way for further optimization of the supporting technology and solutions,the realization of deep roadway deformation control.(6)Using the method of numerical simulation of surrounding rock has no supporting scheme by comparison with a new design,the stress concentration coefficient decreases,the deformation is reduced,the extent of damage is also reduced in roadway support design,that is better than the original design,and achieved good results.(7)According to the field test,through the effective support of roadway support in the strength of the surrounding rock and the stiffness of the overall strengthening,the bearing capacity is greatly enhanced,and the roadway roof subsidence and heave and deformation of two sides has been effectively controlled. |
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