Research On The Method Of Grade Determination For Surrounding Rock Stability Based On TSP Multiwavc Relation

From the analysis on the character of elastic wave through a rock medium, amethod of seismic reflection in the advanced geological exploration is studied in thepaper for the multiwave picking and seperation, the relationship between the multiwaveof seismic reflection and classification indexes of the surrounding rock, based on theoryof variable fuzzy sets for modeling of the rock mass rating in classification methods, arapid determination method for judgement is proposed by use of relationship of TSPmultiwave for classification of surrounding rock in situ.1、Study on analysis of characteristics of elastic wave in rock medium and seismicreflection wave method in the advanced geological exploration the multi wave pickingand seperation. Method of seismic reflection wave in advanced prediction is anapplication of the dynamics theory of elastic wave with exploration technology of multicomponent as well as using P wave source and the x, y, z three component geophonereceiving seismic information to get fullwave with multi-component in seismic record.Using the kinematics principle P and S wave is separated according to the informationof incident wave angle of P, SV, SH three-component as well as processing to get acomplete P-SV, P-SH wave and P-P seismic wave record.2、Research on the relationship between the multiwave seismic reflection wave andthe surrounding rock classification indexes. Waves of the speed of propagation inlithosome depend on its composition and pore fillings of flexibility, speeds oflongitudinal wave and transverse wave in rock, are mainly determined by the elasticmodulus of the rock, stiffness ratio and density. Based on the characteristics of seismicwave propagation in the rock, the hard degree, complete degree and level of containingwater as well as classification indexes of surrounding rock as a series of parameterscan be calculated by a backward method.3、Study on decision method of the classification of rock mass based on variablefuzzy sets. On the basis of theory of traditional fuzzy sets, theory of variable fuzzy setsis integrated into the evolution of the material by three law of development in a newachievement and blended in dialectical materialism on difference, total direction, themediation, the concept of the poles from two aspects of qualitative and quantitative tosolve contradictory problems of things in the process of change. As an innovation theevaluation method is introduced into the algorithm of decision for the gradeclassification of surrounding rock to solve the current problem that methods of surrounding rock classification is only between qualitative and quantitativedeterminationAccording to the safety driving problems faced in tunnel construction geologicalprediction, using TSP test data inversion of rock hardness, integrity and watercharacteristic parameters, the determination model of surrounding rock classificationbased on the variable fuzzy sets for surrounding rock classification. You can use theexisting geological forecast means the achievements, with no increase in additional costmethod, the use of advanced, scientific method, in situ on surrounding rock stabilitygrade determination, not only reduced the economic investment, and reduce thedetection procedure, have greatly improved invest, from detection technologyinvestment and time efficiency compared to the original method, to guide theconstruction, save the cost, construction scheme design plays a positive role. Thismethod not only has the profound theory value, but also has significant social benefitsand huge economic benefits.