An Innovative Approach for Gob-Side Entry Retaining With Thick and Hard Roof: A Case Study

Zizheng Zhang; Weijun Wang; Shuqing Li; Jianbiao Bai; Shengpeng Hao; Hai Wu; Xianyang Yu

doi:10.17559/TV-20160816155022

Tehnički Vjesnik (Jan 2018)

An Innovative Approach for Gob-Side Entry Retaining With Thick and Hard Roof: A Case Study

Zizheng Zhang,
Weijun Wang,
Shuqing Li,
Jianbiao Bai,
Shengpeng Hao,
Hai Wu,
Xianyang Yu

Affiliations

Zizheng Zhang: Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, No. 1, Taoyuan Road, Yuhu District, Xiang
Weijun Wang: School of Resources, Environment and Safety Engineering, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, No. 1, Taoyuan Road, Yuhu District, Xiangtan 411201, Hunan Province, China
Shuqing Li: Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, No. 1, Taoyuan Road, Yuhu District, Xiang
Jianbiao Bai: State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou, Jiangsu, 221116, China
Shengpeng Hao: State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, No. 1, Daxue Road, Xuzhou, Jiangsu, 221116, China
Hai Wu: Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, No. 1, Taoyuan Road, Yuhu District, Xiang
Xianyang Yu: Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, No. 1, Taoyuan Road, Yuhu District, Xiang

DOI: https://doi.org/10.17559/TV-20160816155022
Journal volume & issue: Vol. 25, no. 4
pp. 1028 – 1036

Abstract

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An innovative roadway layout in a Chinese colliery based on gob-side entry retaining (GER) with thick and hard roof (THR) was introduced. Suspended roof is left with a large area in GER with THR, which leads to large area roof weighting (LARW). LARW for GER with THR and mechanism of shallow-hole blasting to force roof caving in GER were expounded. Key parameters of shallow-hole blasting to force roof caving are proposed. LS-DYNA3D was used to validate the rationality of those key parameters, and UDEC was used to discuss and validate shallow-hole blasting to force roof-caving effect by contrast to the model without blasting and the model with shallow-hole blasting. Moreover, shallow-hole blasting technology to force roof caving for GER with THR was carried out in the Chinese colliery as a case study. Field test indicates that shallow-hole blasting technology effectively controls ground deformation of GER with THR and prevents LARW.

Published in Tehnički Vjesnik

ISSN: 1330-3651 (Print); 1848-6339 (Online)
Publisher: Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
Country of publisher: Croatia
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://hrcak.srce.hr/tehnicki-vjesnik

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