长壁工作面采空区见方形成异常来压的微震监测研究

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Abstract Fracture instability and sink are the fundamental reason of strata pressure behaviors. Microseismic monitoring technology is applied to strata fracture monitoring of the goaf square period(i.e. length of the goaf sides of longwall face are equal) in longwall face. Relationships among microseismic events，strata movement and strata pressure behavior are conducted to reveal the physical mechanism of large energy microseismic events and abnormal strata pressure of surrounding strata during goaf square. Comprehensive comparative studies，statistics of dynamic changes of working resistance of support and collapse of coal wall of longwall face，have shown that mining influence range is larger than normal mining；and energy release of strata reaches a maximum value. The results prove that long wall face will occur abnormal strata pressure during goaf square can be used to guide prevention of mine dynamic disaster as coal bump，coal and gas outburst and water inrush of strata.

Key words： mining engineering goaf square of long wall face strata movement microseismic monitoring abnormal strata pressure

Received: 15 October 2011

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http://www.rockmech.org/EN/Y2012/V31/Is2/3889

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