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- W2396846406 abstract "To investigate the abnormal ground pressures and roof control problem in fully mechanized repeated mining of residual coal after room and pillar mining, the roof fracture structural model and mechanical model were developed using numerical simulation and theoretical analysis. The roof fracture characteristics of a repeated mining face were revealed and the ground pressure law and roof supporting conditions of the repeated mining face were obtained. The results indicate that when the repeated mining face passes the residual pillars, the sudden instability causes fracturing in the main roof above the old goaf and forms an extra-large rock block above the mining face. A relatively stable “Voussoir beam” structure is formed after the advance fracturing of the main roof. When the repeated mining face passes the old goaf, as the large rock block revolves and touches gangue, the rock block will break secondarily under overburden rock loads. An example calculation was performed involving an integrated mine in Shanxi province, results showed that minimum working resistance values of support determined to be reasonable were respectively 11,412 kN and 10,743 kN when repeated mining face passed through residual pillar and goaf. On-site ground pressure monitoring results indicated that the mechanical model and support resistance calculation were reasonable." @default.
- W2396846406 created "2016-06-24" @default.
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- W2396846406 date "2016-07-01" @default.
- W2396846406 modified "2023-10-06" @default.
- W2396846406 title "Ground pressure and overlying strata structure for a repeated mining face of residual coal after room and pillar mining" @default.
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- W2396846406 doi "https://doi.org/10.1016/j.ijmst.2016.05.017" @default.
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