METHOD FOR MODIFYING FILLING MATERIAL MECHANICAL CHARACTERISTIC CURVE BASED ON ACTUAL MEASUREMENTS

摘要

Disclosed is a method for modifying a filling material mechanical characteristic curve based on actual measurements. The steps are as follows: A. based on laboratory steel drum compaction test, performing uniaxial confined compression on a filling material, and drawing a test curve of the relation between the stress and strain, and the relation between the volume-weight and elastic foundation coefficient; B. according to the variation trend of the test curve, by means of data processing software such as Excel, Origin and Matlab, fitting an expression of the relation between the stress and strain, and the relation between the volume-weight and elastic foundation coefficient; C. performing field dynamic monitoring on the relation between the stress and strain of a filling body in the process of backstopping a working face, so as to obtain an actual field measurement curve; D. respectively drawing a filling material mechanical characteristic curve for the test and the actual measurement in the same coordinate system; and E. comparing the test and actual test curves, taking the actual measurement curve as a target, and using a method for modifying the characteristic parameters of a fitting relational expression to modify the test curve. The method provides a theoretical foundation for rational and optimal design of engineering parameters such as a filling-to-mining mass ratio, a filling ratio, the number of times of compaction and the compaction power.