Grading evaluation method for explodability of step rock mass of open-pit mine rock

Abstract

The invention discloses a grading evaluation method for explodability of a step rock mass of an open-pit mine rock. Selecting rock mass explosibility grading indexes, determining a rock mass explosibility grading standard, respectively calculating digital characteristic expectation Ex, entropy En and hyper-entropy He of the cloud corresponding to each explosibility grading index, writing a forwardnormal cloud generator, and generating a cloud model of each explosibility grading index belonging to each rock mass explosibility grade; selecting a rock mass sample for measurement, and calculatingthe determinacy of each explodability grading index belonging to each explodability grade; counting the sample data to obtain the comprehensive weight of each explodability grading index; synthesizing the determinacy of each explosibility grade and the comprehensive weight of each explosibility grading index, calculating the comprehensive determinacy of the rock mass belonging to each explosibility grade, obtaining an explosibility grade determinacy model, and further determining the explosibility grade of the rock mass; grading end. According to the method, the defects of fuzziness and randomness of rock mass explodability grading in an existing explodability grading method can be overcome, and a grading result with high accuracy and reliability is provided.

Description

technical field [0001] The invention relates to a method for evaluating coal mine rock mass, in particular to a method for grading and evaluating the explosiveness of stepped rock mass in an open-pit mine, and belongs to the technical field of open-pit mining. Background technique [0002] The rock stripping and ore recovery projects of open-pit mines mostly use the perforation blasting method for pre-crushing. Compared with mechanical crushing and thermal crushing, its advantage is that the blasting volume is large and it can crush very hard rocks, so it is the most widely used. The effect of ore blasting and crushing has a great impact on the efficiency of production links such as mining, transportation, and crushing. For example, after the ore is crushed, unqualified large pieces need to be crushed again, which increases the cost of blasting and affects the efficiency of loading; However, excessive crushing of useful minerals will affect product quality and reduce its eco...

AI Technical Summary

Problems solved by technology

Because the explosiveness of rock mass is affected by many factors, with great complexity, ambiguity and randomness, it is difficult to use a single index to comprehensively reflect the explosiveness of rock mass

It is difficult for the above methods to reflect the ambiguity and randomness of rock mass explosiveness at the same time, and the reliability of the classification results given is low

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