A method and a system for automatically identifying surrounding rock levels by applying while-drilling parameters

A technology of surrounding rock grades and parameters, applied in special data processing applications, electronic digital data processing, unstructured text data retrieval, etc., can solve problems such as greater influence of classification standards and no clear boundaries of surrounding rocks at all levels, and achieve High work efficiency, high precision and easy to use
CN109635461AActive Publication Date: 2019-04-16CHINA RAILWAY CONSTR HEAVY IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA RAILWAY CONSTR HEAVY IND
Publication Date
2019-04-16

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Abstract

The invention discloses a method and a system for identifying a surrounding rock level by applying while-drilling parameters. The method comprises the following steps of: preprocessing a data set of the acquired while-drilling parameters; Analyzing the preprocessed data set of the parameters while drilling; determining the contribution rate of each variable in the parameters while drilling by applying different data dimension reduction methods; using an ordered weighted average operator method to carry out weighted average calculation on the calculated contribution rates, carrying out sortingand preferential selection according to the contribution rates obtained after calculation and carrying out combination, determining main characteristic variables of the while-drilling parameters, andon the basis, sample sets of the main characteristic parameters are classified; The established neural network and expert knowledge system is applied to train main characteristic parameters of different classifications, stable weight coefficients and thresholds are obtained, and surrounding rock recognition verification is carried out on the established neural network mathematical model by applying sample data. According to the invention, a machine automatic identification scheme which is higher in working efficiency, more convenient to use and higher in precision can be realized.
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Description

technical field

[0001] The invention relates to the field of engineering machinery, in particular to a method and a system for automatically identifying the grade of surrounding rock by applying parameters while drilling. Background technique

[0002] A tunnel is a cavern structure system built in a variety of surrounding rock media with certain stress history and structural signs. Tunnel surrounding rock refers to the rock and soil mass that affects the stability of the tunnel within a certain range around the tunnel. The formation, whether it is rock mass or soil mass, is collectively referred to as the tunnel surrounding rock. In order to meet the needs of tunnel construction, according to the stability of the surrounding rock, the comprehensive rock index is used to divide the surrounding rock into different grades, that is, the surrounding rock classification. The correct evaluation of the surrounding rock level of the tunnel is not only related to the design, construc...

Claims

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