Tehnički vjesnik, Vol. 25 No. 4, 2018.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20160816155022
An Innovative Approach for Gob-Side Entry Retaining With Thick and Hard Roof: A Case Study
Zizheng Zhang
orcid.org/0000-0001-8764-9635
; 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
Sažetak
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.
Ključne riječi
gob-side entry retaining; large area roof weighting; LS-DYNA3D; shallow-hole blasting; thick and hard roof
Hrčak ID:
204449
URI
Datum izdavanja:
20.8.2018.
Posjeta: 1.504 *