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:
Jun. 13, 2023
Filed:
Mar. 01, 2022
China Coal Technology & Engineering Group Shenyang Engineering Company, Liaoning, CN;
Rui Zhou, Liaoning, CN;
Kaijia Zhang, Liaoning, CN;
Haisheng Qiu, Liaoning, CN;
Hongzhen Zhang, Liaoning, CN;
Xing Ni, Liaoning, CN;
Zhongyu Zheng, Liaoning, CN;
Zhigang Fan, Liaoning, CN;
Shipeng Xue, Liaoning, CN;
Peng Li, Liaoning, CN;
Abstract
A prediction method for coal and gas outburst based on comparing borehole gas flow curves includes the following steps: constructing a seam-crossing borehole in the coal seam, measuring or calculating gas flow corresponding to critical gas pressure P, which is a reference gas flow Q(t); performing linear regression on the reference gas flow Q(t)to form a reference flow curve; constructing a predicted seam-crossing borehole in a predicted area, and directly testing a gas flow at each time t in a delayed manner, which is a predicted gas flow Q(t); performing linear regression on the predicted gas flow Q(t)to form a predicted flow curve; and judging whether the predicted flow curve is above the reference flow curve or whether the predicted flow curve intersects with the reference flow curve, and judging whether the coal seam in the predicted area has a risk of coal and gas outburst.