公开(公告)号：US20210277779A1

公开(公告)日：2021-09-09

申请号：US17253126

申请日：2019-06-24

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Jixiong ZHANG ,  Yang JU ,  A.J.S. (Sam) Spearing ,  Meng LI ,  Nan ZHOU ,  Weiqing ZHANG

IPC: E21F17/18 ,  E21F15/02

Abstract: Provided are a system and a method for monitoring bearing compression rate of a filler in a coal mine gob area. An ground information processing system, a vibration source control system, and a monitoring system are arranged on the ground according to a buried depth of the filler in the gob area. The vibration source control system generates vibration, and transmits a signal to the filler. The monitoring system on the ground receives different reflected waves according to different elasticities of the fillers under different compaction degrees. Final data is transmitted to the ground information processing system for data processing. The monitoring of the filler starts when the filler is filled in the gob area; the filler is gradually compacted. The filler is monitored until the thickness of the filler does not change. Finally, a bearing compression rate formula is utilized to calculate the bearing compression rate of the filler.