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Mechanism of formed-reinforcement in last roadway for pillar in the fully-mechanized gob-side entry

Zhang Hongwei, Zhijun Wan, Yuan Zhang

Abstract


In order to study the mechanism of the stability control of pillar by growing in the lastRoadway, methods involved the in-situ test and numerical simulation are employed. the ease of growth and the impact of filling ratio to formation of pillar are analyzed. results show that the Ru-in roadway besides pillar is filled with crushed rocks, which is relaxing for growing. further, under varied fill rates, the pillar experiences three formation stages, namely, 0-10% (marked increase), 20%-20% (slightly increase) and 25%-10% (stable ). the reasonable filling ratio locator in 20%.


Keywords


Unstable overselling Strata;Narrow Coal Pillar;Working Face ends;Caving characteristics;Growing information;Infill Ratio

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DOI: http://dx.doi.org/10.18686/gmr.v1i1.1214

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