Coal seam stress monitoring rock burst critical early warning index value setting method

• Main Authors: YANG SUIHAN, HU NAN, LIU JUN, WEI QUANDE, KONG HE, XIA FANGQIAN, BAO XINYANG, KANG HONGTAO, WANG YANFEI, WANG YANLIANG, WEI XIANGZHI
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to the field of mine dynamic disaster monitoring and early warning, in particular to a coal seam stress monitoring rock burst critical early warning index value setting method. The method comprises the following steps: 1, manufacturing a cubic coal briquette standard component and a shortened stress meter; 2, punching holes in the cubic coal briquette, and installing a stress meter; 3, applying preloading force to the cubic coal briquettes by the testing machine; 4, initially pressing the stressometer; 5, testing according to a one-way compression mode and a cyclic loading and unloading mode; 6, analyzing and summarizing the function relationship between the coal stress and the borehole stress line elastic stage, and establishing a function relationship formula; and 7, providing a coal seam stress monitoring rock burst critical early warning value index setting and revision method. The method solves the problems that the existing method for monitoring and early warning the rock burst thr