The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 2021
Filed:
Mar. 30, 2018
University of Science and Technology Beijing, Beijing, CN;
Zhong-an Academy of Safety Engineering, Beijing, CN;
Zhenlei Li, Beijing, CN;
Xueqiu He, Beijing, CN;
Dazhao Song, Beijing, CN;
Shengquan He, Beijing, CN;
Donghui Li, Beijing, CN;
UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, CN;
ZHONG-AN ACADEMY OF SAFETY ENGINEERING, Beijing, CN;
Abstract
A monitoring and forewarning method for coal-rock dynamic disasters based on an electromagnetic radiation and an earth-sound monitoring includes the following steps: (1) calculating the weighted average value of research parameter P(t) during a time period according to the monitoring data collected by the electromagnetic radiation and the earth-sound monitoring system in real time; (2) calculating D(t), the deviation value of P(t); (3) calculatingas the deviation threshold value, the average value of |D(t)| during period of normal mining of the working surface; (4) calculating D, the number of times that D(t) is greater thanin one day; (5) normalizing Dto obtain the monitoring and forewarning index ε; (6) forewarning the hazard state of dynamic disaster of the working surface in real time according to ε and forewarning method, determining hazard level.