IGGCAS OpenIR
Analysis of Hydro-fracturing Technique Using Ultra-deep Boreholes for Coal Mining with Hard Roofs: a Case Study
Zheng, Jianwei1,2,3; Ju, Wenjun1,2,3; Sun, Xiaodong1,2,3,4; Jiang, Pengfei1,2,3; Zheng, Yangfa1,2,3; Ma, Zhaorui1,2,3; Zhu, Lingfu1,2,3,5; Yi, Bingding1,2,3,5
2020-11-02
Source PublicationMINING METALLURGY & EXPLORATION
ISSN2524-3462
Pages14
AbstractThe presence of hard roof poses a significant threat to the safety of underground coal mining. In this study, a mechanical model is established for underground stopes to analyze the overburden structure with the advancing of the mining face. It is indicated that the load-bearing arch structure (LBAS) is formed above the stope for roofs with regular hardness, whereas the reversed-basin bearing structure (RBBS) is formed for hard roofs. Compared with the LBAS, the RBBS can induce an additional pressure at the foot of the bearing structure, and this effect becomes less as the distance between the hard roof and stope increases. The ultra-deep borehole hydro-fracturing technique (UHT) is proposed to weaken the hard roof for pressure release, and the associated equipment and procedures are also presented. The UHT is based on horizontal drilling along the axial direction of the roadway in the roof, and then the receding segmented hydraulic fracturing technique is used to achieve the purpose of fracturing (weakening) of the surrounding rocks. Field tests are carried out in 3022 roadway of Daliangwan coal mine in Yulin to assess the developed technique, equipment, and fracturing procedures. To evaluate the fracturing effect, deep borehole stress-meters are installed at different depths of the fractured and un-fractured zones of the roadway, along with hydraulic support pressure sensors placed at the mining face. The results show that compared with the un-fractured zone, the pressure on the wall and pillar sides is lower than that in the fractured zone, and the associated weighting duration and weighting area ratio of the fractured are reduced by 53.23% and 33.59%, respectively. This indicates that the presented UHT can provide a new solution for the prevention and control of mining disasters induced by hard roof failures in underground coal mining.
KeywordUltra-deep borehole hydro-fracturing technique Hard roof Strata spatial structure Stress arch Fracturing-before-injecting
DOI10.1007/s42461-020-00334-2
Funding OrganizationTiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China ; Tiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China ; Tiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China ; Tiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China
WOS KeywordHYDRAULIC FRACTURE ; SIMULATION ; MECHANICS ; EXTRACTION ; STABILITY ; GATEROAD ; STRATA
Language英语
Funding ProjectTiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project[2019-TD-ZD008] ; Science and Technology Innovation Venture Capital Special Project[KJ-2018-TDKCZL-05] ; Science and Technology Innovation Venture Capital Special Project[2019-TD-ZD006] ; State Key Program of National Natural Science of China[2017YFC0603003] ; National Science Foundation for Distinguished Young Scholars of China[51704160] ; National Science Foundation for Distinguished Young Scholars of China[51704156]
Funding OrganizationTiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China ; Tiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China ; Tiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China ; Tiandi Science and Technology Co., Ltd. ; Tiandi Science and Technology Co., Ltd. ; Science and Technology Innovation Venture Capital Special Project ; Science and Technology Innovation Venture Capital Special Project ; State Key Program of National Natural Science of China ; State Key Program of National Natural Science of China ; National Science Foundation for Distinguished Young Scholars of China ; National Science Foundation for Distinguished Young Scholars of China
WOS Research AreaMetallurgy & Metallurgical Engineering ; Mining & Mineral Processing
WOS SubjectMetallurgy & Metallurgical Engineering ; Mining & Mineral Processing
WOS IDWOS:000584327500003
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/98215
Collection中国科学院地质与地球物理研究所
Corresponding AuthorZheng, Jianwei
Affiliation1.China Coal Res Inst, Beijing Min Res Inst, Beijing 100013, Peoples R China
2.CCTEG Coal Min Res Inst, Beijing 100013, Peoples R China
3.Tiandi Sci & Technol Co Ltd, Coal Min & Designing Dept, Beijing 100013, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
5.Daliangwan Coal Mine, Yulin 719000, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Zheng, Jianwei,Ju, Wenjun,Sun, Xiaodong,et al. Analysis of Hydro-fracturing Technique Using Ultra-deep Boreholes for Coal Mining with Hard Roofs: a Case Study[J]. MINING METALLURGY & EXPLORATION,2020:14.
APA Zheng, Jianwei.,Ju, Wenjun.,Sun, Xiaodong.,Jiang, Pengfei.,Zheng, Yangfa.,...&Yi, Bingding.(2020).Analysis of Hydro-fracturing Technique Using Ultra-deep Boreholes for Coal Mining with Hard Roofs: a Case Study.MINING METALLURGY & EXPLORATION,14.
MLA Zheng, Jianwei,et al."Analysis of Hydro-fracturing Technique Using Ultra-deep Boreholes for Coal Mining with Hard Roofs: a Case Study".MINING METALLURGY & EXPLORATION (2020):14.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zheng, Jianwei]'s Articles
[Ju, Wenjun]'s Articles
[Sun, Xiaodong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zheng, Jianwei]'s Articles
[Ju, Wenjun]'s Articles
[Sun, Xiaodong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zheng, Jianwei]'s Articles
[Ju, Wenjun]'s Articles
[Sun, Xiaodong]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.