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Title: Deformation Monitoring of Waste-Rock-Backfilled Mining Gob for Ground Control
Authors: Zhao, Tongbin
Zhang, Yubao
Zhang, Zhenyu
Li, Zhanhai
Ma, Shuqi
Keywords: Deformation
Resistance Transducer
Issue Date: 2017
Source: Zhao, T., Zhang, Y., Zhang, Z., Li, Z., & Ma, S. (2017). Deformation Monitoring of Waste-Rock-Backfilled Mining Gob for Ground Control. Sensors, 17(5), 1044-.
Series/Report no.: Sensors
Abstract: Backfill mining is an effective option to mitigate ground subsidence, especially for mining under surface infrastructure, such as buildings, dams, rivers and railways. To evaluate its performance, continual long-term field monitoring of the deformation of backfilled gob is important to satisfy strict public scrutiny. Based on industrial Ethernet, a real-time monitoring system was established to monitor the deformation of waste-rock-backfilled gob at -700 m depth in the Tangshan coal mine, Hebei Province, China. The designed deformation sensors, based on a resistance transducer mechanism, were placed vertically between the roof and floor. Stress sensors were installed above square steel plates that were anchored to the floor strata. Meanwhile, data cables were protected by steel tubes in case of damage. The developed system continually harvested field data for three months. The results show that industrial Ethernet technology can be reliably used for long-term data transmission in complicated underground mining conditions. The monitoring reveals that the roof subsidence of the backfilled gob area can be categorized into four phases. The bearing load of the backfill developed gradually and simultaneously with the deformation of the roof strata, and started to be almost invariable when the mining face passed 97 m.
ISSN: 1424-8220
Rights: © 2017 by The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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