Method for determining the plastic zone boundary, determination device and monitoring system

By installing microseismic sensors around the mining face to monitor microseismic events and using the microseismic monitoring system to determine the boundary of the plastic zone, the problem of insufficient accuracy in existing technologies is solved, and accurate prediction of the range of the plastic zone is achieved.

CN116658250BActive Publication Date: 2026-06-09SHENHUA XINJIE ENERGY
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENHUA XINJIE ENERGY
Filing Date
2023-07-10
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies that use theoretical calculations or stress gauge monitoring methods to determine the boundary of the plastic zone are not accurate enough, making it difficult to accurately determine the extent of the lateral plastic zone in the goaf.

Method used

By installing microseismic sensors around the mining face, microseismic events caused by rock mass fracturing or fluid disturbance are monitored. The location information of microseismic events is determined using the microseismic monitoring system, and the boundary of the plastic zone is determined based on the distance from the goaf.

Benefits of technology

It improves the accuracy of determining the boundary of the plastic zone, enabling more accurate prediction of the range of plastic deformation around the mining face, and guiding the rational layout of the roadway in the next working face.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116658250B_ABST
    Figure CN116658250B_ABST
Patent Text Reader

Abstract

This application provides a method, device, and monitoring system for determining the boundary of a plastic zone. The method includes: acquiring target microseismic signals during the mining process to obtain multiple microseismic signal groups, wherein the target microseismic signal in each microseismic signal group is obtained by monitoring the same microseismic sensor, and the target microseismic signal is the microseismic signal generated by a microseismic event detected by the microseismic sensor during the mining process, and the microseismic event is an event that generates microseismic activity due to rock mass fracturing or fluid disturbance; inputting the multiple microseismic signal groups into a microseismic monitoring system to obtain first location information of each microseismic event, wherein the first location information is the location where each microseismic event occurs; determining the distance between each microseismic event and the goaf based on the multiple first location information; and determining the boundary of the plastic zone based on the multiple distances. The boundary of the plastic zone is used to characterize the boundary of the area where the probability of plastic deformation of the mining face exceeds a threshold, thus solving the problem that the accuracy of determining the boundary of the plastic zone by theoretical calculation or stress gauge monitoring is insufficient.
Need to check novelty before this filing date? Find Prior Art