Informatics Publishing Limited

Ke Gao ¹, Jian Liu ¹, Xiaowei Geng ¹, Yujiao Liu ¹, Yu Wang ¹

Affiliations
1 College of Safety Science and Engineering, Liaoning Technical University, Liaoning, Huludao-125105, CN

Abstract

Most coal mines in China have a tendency to spontaneous combustion, which is outstanding in goaf. To effectively solve the problem, CFD technology is used for flow field in the goaf, and superposed field between volume fraction of oxygen and velocity is adopted as the standard. The influence of air quantity on danger zone for spontaneous combustion and width of oxidation zone is analyzed. The results show that with increasing of air quantity, shape of oxidation zone which is "L" has not changed but moves towards back, however, area of danger zone of spontaneous combustion increases. And width of oxidation zone exhibits an impact of quadric relationship on air quantity.

Keywords

Fully-Mechanized Caving Face, Goaf, Spontaneous Combustion, Numerical Simulation.

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You Hong Sun ¹, Fei Yu Zhang ¹, Qing Yan Wang ¹, Ke Gao ¹

Affiliations
1 College of Construction Engineering, Jilin University, Changchun, CN

Abstract

Continental scientific drilling is a way to understand the processes and structures of the Earth. Songliao Basin Drilling Project CCSD-SKII was implemented in Northeast China to obtain the Cretaceous continental sedimentary record. Continental Scientific Drilling Project of Cretaceous Songliao Basin is introduced in this paper. To meet the continuous coring need of CCSD-SKII, Pipe handler was designed to rack drill-stands automatically and efficiently. Dynamic modeling and simulation was carried out to verify the stability and reliability. After installed in ‘Crust 1’ 10 k drilling rig, Pipe handler was also extensively tested and debugged. Pipe handler is now racking drill-stands in CCSD-SKII scientific drilling site without a derrickman.

Keywords

Songliao Basin Drilling Project, ‘Crust 1’ 10k Drilling Rig, Pipe Handler, Dynamic Simulation, Continental Scientific Drilling.

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