Gas seepage equations of the coal seam under the action of moisture and the stress field

• Autorzy: Li B. , Li P. , Sun D. H. , Zhang L. L. , Wei C. F. , Borisyuk Y. A.
• Języki publikacji: EN

Abstrakty

EN

A seepage experiment was conducted in relation to a loaded coal mass with various moisture content and working conditions using self-developed tri-axial gas seepage equipment. A briquette sample was used as the research object. The change in the relationship of coal mass permeability under the combined action of moisture content and effective stress was studied experimentally. The relational function was established between coal mass permeability under this combined action and the seepage equation expressing gas migration in the coal seam. The research showed the following: (1) the moisture content of coal heavily influences effective permeability, as coal mass permeability decreases in a quadratic polynomial relationship with the increase of effective stress at constant moisture content; (2) at constant moisture content in the coal mass, coal mass permeability gradually declines in a negative exponent relationship with the increase of effective stress. Moreover, coal seam gas seepage equations under the combined action of moisture and stress field were put forward based on experimental results, the law of mass conversation and Darcy’slaw.

Słowa kluczowe

EN

rate of moisture content; effective stress; permeability; gas seepage

PL

wilgotność; ocena wilgotności; naprężenie rzeczywiste; przepuszczalność; wyciek gazu

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2015
• Tom: Vol. 95, nr 4
• Strony: 250--257
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Li B.

• State Key Lab Cultivation Base, Henan Province Key Lab of Gas Geology & Gas Control, Henan Polytechnic University, Jiaozuo, 454003, China
• Henan Key Laboratory of Biogenic Traces & Sedimentary Minerals, Henan Polytechnic University, Jiaozuo, 454003, China
• Collaborative Innovation Center of Coal Work Safety,Henan Province , Henan Polytechnic University, Jiaozuo, 454003, China

autor

Li P.

• School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou, 450007, China

autor

Sun D. H.

• State Key Lab Cultivation Base, Henan Province Key Lab of Gas Geology & Gas Control, Henan Polytechnic University, Jiaozuo, 454003, China

autor

Zhang L. L.

• State Key Lab Cultivation Base, Henan Province Key Lab of Gas Geology & Gas Control, Henan Polytechnic University, Jiaozuo, 454003, China

autor

Wei C. F.

• State Key Lab Cultivation Base, Henan Province Key Lab of Gas Geology & Gas Control, Henan Polytechnic University, Jiaozuo, 454003, China

autor

Borisyuk Y. A.

• CKC Gas Turbines Power and Engineering Research Co., Ltd, Santiago, 22, Chile

Bibliografia

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