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Evaluation Of High And Steep Slope Rock Mass Quality Of Changbai Mountain Longmen Peak

Posted on:2013-02-08Degree:DoctorType:Dissertation
Country:ChinaCandidate:M LiFull Text:PDF
GTID:1112330371977504Subject:Geological disaster prevention projects
Abstract/Summary:PDF Full Text Request
Geological feathers of the complex rock engineering comprehensively reflectwhether the quality of rock is good or not, which not only represents the inherentmechanic qualities objectively,but provide the analysis of engineering stability,effective utility of the rock and correct selecting various parameters of rockmechanics with liable data. Hence the evaluation of rock mass bridges the survey ofrock engineering, design and construction. China is a mountainous country(Mountainous area occupies85percent of the whole country), of whose populationthere is70percent relying the mountainous resources. In recent years the geologicaldisasters of collapsing rocks happens frequently,which are extensive,massive anddangerous.The uncertainty and abruptness of these disasters have caused theincreasing casualty and economic loss.Since1998, there have been many collapsingrock disasters at different degrees in the region of Changbai Mountain. The study ofthe rock quality evaluation and sophisticated master of the principle of these disastershas made a tremendous contribution to the precaution of the disasters. The study ofrock quality on the edges of Longmen Peak that threats the safety of tourists, based onthe program of "the survey of precaution in the Heaven Lake region of ChangbaiMountain.Due to the fact that rock has its texture, the texture surfaces of it determine thedistortion of shape and the degree of its collapsing the distortion of rock is not justmaterial's changing and includes the alteration of texture. By extension, materialdestroying is not the only reason of rock collapse, in many cases, it is the imbalanceof construction. The steep slops in the region of Heaven Lake and the surroundings ofChangbai Mountain are made of rocks with rough surfaces, whose seams aredeveloping. The rocks with rough surfaces lack flexibility,because of which the board and cylindrical rocks bend under the gravity.Finally it would be broken due to theinflexibility.It is also one of the reasons why collapses happens frequently.The study to average mass area of rock is one of the most essential content,which is also the basic range of three dimension seamed rock. Miler' concretedescription and calculation of dividing the areas of average mass rock usually take thefactors of seams into consideration. The different categories of seams could bedistinguished, not only by the states but by some factors of length. In the article, theauthor, based on the contingency table column chi-square test, divide the areas inaccordance with the method of length. That is to say, the factors of length are takeninto consideration through comparing two samples by the test, calculating the actualfrequency and the data. Based on judging whether there are some similarities betweenthe calculations, the method of recognizing areas was built, which enables this kind ofdivision to be objective and exhaustive.The method of extenics based on probability and statistic comes into a kind ofanalyze method of extenics, through the Monte Cairo simulation adding the thoughtsfrom Statistics. Suppose all the components are in the normal distribution, the authormade use of stochastic simulation according to the average and the variance,meanwhile selecting one from the entire component to form a group of matterelements, utilizing the method of extenics, calculating the categories to figure out theprobability. In this chapter, the method of extenics adding the Monti Cairosimulation makes the data is closer to practical project. Nawadays, the relativeliteratures and studies home and abroad are in lack, thus it is an attempt to classify themass and quality by the method mentioned above.
Keywords/Search Tags:Rock Quality, Chi-Square Test, statistical homogeneity of structure, fractured rock mass, Monte-Carlo simulates, probability statistics, contingency table
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