大断面综放沿空煤巷顶板破坏机制及锚索桁架控制_魏臻.pdfVIP

34 1 Vol.34 No.1 2017 01 Journal of Mining Safety Engineering Jan. 2017 1673-3363-(2017)01-0001-081 (() 100083) 20103 1) 2) 3) B 200~600 mm 250 mm 0 0.9 m TD 353 A DOI 10.13545/ki.jmse.2017.01.001 Failure mechanism and cable truss control of large-scale section gob-side entry roof with fully-mechanized caving WEI ZhenHE FulianZHANG GuangchaoGAO YuanLAI Yonghui (College of Resources Safety EngineeringChina University of Mining Technology (Beijing)Beijing 100083China) Abstract To solve the support problem of large-scale section gob-side entry with fully-mechanized caving in the process of excavating, with haulage roadway 20103 of Wangjialing coal area as the engi- neering background, the failure mechanism and control technology were analyzed through field obser- vation, theoretical analysis, numerical simulation, in-situ test and monitoring. The research results have shown that 1) Intense asymmetric sink and horizontal dislocation deformation occur in the roof, sur- rounding rock of roof over the pillar side is severely crushed, and coal pillar is severely damaged; 2) Asymmetric distribution of property and support stress of the surrounding rocks along the axis of road- way caused by rotation movement of the key blocks inevitably leads to asymmetric strata beha