An inversion method for impact tendency based on while-drilling parameters

CN116427907BActive Publication Date: 2026-01-16SHANDONG UNIV OF SCI & TECH
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Patent Information

Application Number
CN202310425703.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-20
Publication Date
2026-01-16
Estimated Expiration
2043-04-20

AI Technical Summary

Technical Problem

Existing technologies for evaluating the impact tendency of coal seams and roof and floor have problems such as sample transportation errors, errors caused by changes in stress state, and long test cycles. These problems result in evaluation results that do not match the actual situation on site, making it impossible to accurately formulate support plans and posing safety hazards.

Method used

By obtaining coal seam or roof and floor samples, conducting large-scale true triaxial experiments, measuring drilling parameters, establishing the relationship between drilling parameters and impact tendency parameters, and using on-site drilling parameters to invert the impact tendency of coal seams and roof and floor, the problems of sample transportation errors and long indoor test times are avoided.

Benefits of technology

It improves the accuracy and efficiency of impact tendency assessment, enabling rapid inversion of impact tendency during tunnel excavation, providing a reliable basis for support schemes, reducing errors and improving safety.

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Abstract

The application discloses a kind of based on while drilling parameter to impact tendency inversion method, belong to mining safety field.First, the same type of two groups of coal / rock sample is obtained, one group is measured while drilling parameter by large-scale true triaxial experiment, and the related parameters of coal seam impact tendency or roof and floor parameters are determined by experiment;Then, the relationship between while drilling parameter and impact tendency parameters / roof and floor parameters is established, and the inversion coefficient in each relationship is obtained by inversion;When the coal rock impact tendency of site engineering needs to be judged, only the while drilling parameter is collected, then the related parameter value of coal rock impact tendency is obtained by using the relationship, and the impact tendency is determined according to the related parameter value of coal rock impact tendency.The inversion process of the application is not affected by environment, and the inversion result reflects the real stress state of coal or rock sample in original rock, and the actual working condition can be known according to the inversion result, to provide reliable basis for support and tunneling scheme.
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