Formation Mechanism of " Theta " Type Overlying Strata Spatial Structure of Isolated Mining Face and Its Application

By adopting the analysis method of theory, formation and evolution of "[thetas]" type overlying strata spatial structure of isolated mining face are studied, and the "[thetas]" type overlying strata spatial structure is dynamically formed top-down gradually when the "C"...

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Bibliographic Details
Published in:Physical and Numerical Simulation of Geotechnical Engineering no. 22; p. 38
Main Authors: Huajun, Wang, Fuxing, Jiang, Yuqing, Fan, Shanle, Chen
Format: Journal Article
Language:English
Published: 01.03.2016
Subjects:
Coal
Formations
Mathematical models
Mining
Pillars
Space environment
Spacecraft
Strata
ISSN:1838-3254
Online Access:Get full text
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Summary:By adopting the analysis method of theory, formation and evolution of "[thetas]" type overlying strata spatial structure of isolated mining face are studied, and the "[thetas]" type overlying strata spatial structure is dynamically formed top-down gradually when the "C" type space structure above stope area and static "C" type space structure above other mined-out areas connect. Combination of strata movement theory, the relationship of pressure behavior on isolated coal pillar and overlying strata spatial structure in time and space is analyzed, and the calculation formula of coal pillar size when the overlying strata spatial structure is being formed and obtained. Analysis of application of the "[thetas]" type overlying strata spatial structure theory in the safe production of the island is made and its application in isolated stope along the groove design is illustrated. Finally "[thetas]" type overlying strata spatial structure theory is verified by the engineering example.
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ISSN:1838-3254