![](/images/graphics-bg.png)
Safety Mining Technology of Coal Seams in Weathered Zone Based on Ground J-Type Pregrouting Reinforcement
Joint Authors
Tu, Min
Rong, Chuanxin
Cai, Jinlong
Zhang, Hualei
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-20
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
A thin basement coal seam mining model under different overlying strata conditions was developed using the discrete element software UDEC.
This approach is used to discuss the safety mining of the thin basement coal seams.
Fracture development in overlying and rock strata movement law in the stope was discussed.
The relationship between support and surrounding rocks under different overlying strata conditions was analyzed.
Lastly, a field industrial test was conducted based on the research results.
A few major conclusions could be drawn.
Under load transmission in loose water-bearing strata, causing a large-scaled rock strata movement to advance into the working face is easy when only one bearing stratum exists in the overlying strata.
Meanwhile, the support bears strong loads, which can easily be collapsed.
When two bearing strata exist in the overlying one, the upper bearing stratum can form a voussoir beam structure.
Loads on the support decreased substantially compared with those under single bearing stratum, whilst the probability of pressing frame was reduced accordingly.
A weathered zone above the stope was reinforced by ground J-type drilling pregrouting, thereby improving the physical and mechanical properties and increasing the bearing capacity of the rock strata in the grouting range and safety mining of the working face in the lower coal seams.
Research results provide important references for the safety mining of thin basement coal seams under similar conditions.
American Psychological Association (APA)
Tu, Min& Cai, Jinlong& Zhang, Hualei& Rong, Chuanxin. 2018. Safety Mining Technology of Coal Seams in Weathered Zone Based on Ground J-Type Pregrouting Reinforcement. Advances in Civil Engineering،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1115815
Modern Language Association (MLA)
Tu, Min…[et al.]. Safety Mining Technology of Coal Seams in Weathered Zone Based on Ground J-Type Pregrouting Reinforcement. Advances in Civil Engineering No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1115815
American Medical Association (AMA)
Tu, Min& Cai, Jinlong& Zhang, Hualei& Rong, Chuanxin. Safety Mining Technology of Coal Seams in Weathered Zone Based on Ground J-Type Pregrouting Reinforcement. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1115815
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1115815