Study on the activation characteristics and dynamic response of the entire process of fault group passing through the fully mechanized top coal mining face
WANG Lixin
SONG Xinying
ZHAO Naiqiang
ZHANG Fengyan
KONG Dechuang
Abstract：To reveal the laws of fault activation and stress evolution during the mining of a fully mechanized top-coal caving face influenced by a fault group,this study utilized the 924 mining face of Zhongmei Dongpo Coal Industry Co.,Ltd.in Shanxi as the engineering context.Field measurements were conducted to investi-gate the activity characteristics of the fault group under mining influence.Borehole stress monitoring technology was employed,with 16 measurement points arranged in the return airway of the working face,enab-ling real-time acquisition of stress change data in the coal and rock mass on the coal wall side.In conjunction with displacement monitoring of the hanging wall and footwall of the faults,the activation characteristics of the fd28 fault and the N13 fault were analyzed.The research results indicate that:influenced by mining,the stress in the rock strata near the fd28 and N13 faults changed significantly,with a peak vertical stress reaching 9.07 MPa.Surface cracks on the faults gradually propagated,with the maximum displacement of the fd28 fault measuring 9 mm,while that of the N13 fault reached 39 mm,demonstrating clear activation effects.The fault activation effect was most pronounced when the working face advanced to within 20to 30 m of the faults.The fd28 fault tended to stabilize after 32 days of monitoring.These research findings provide a theoretical basis and practical reference for understanding the mechanism of fault activation and for the safety management and control of fault groups under mining conditions.
Keywords：fault activationfault structuremining impactoverburden migrationstope stresses
Publication Date：2025-10-30
Online Publishing Date：2025-11-06(First online date of this platform, not the publication date of the document)
Pages：5( 47-51 )