神东矿区大断面空巷群泵送支柱支护技术研究与应用

doi:10.11799/ce202210007

Abstract

Abstract: In order to solve the safety problem of large section abandoned roadway in fully mechanized mining face, the research on abandoned roadway supporting technology at home and abroad was carried out. The technical problems caused by jump mining, filling and conventional reinforcement support were analyzed. The deformation and instability of surrounding rock and pumping support mechanism of abandoned roadways were analyzed.The treatment combining pumping support and anchor cable support was put forward. Through numerical simulation and theoretical calculation, the design of anchor cable &W steel belt &wall net & pumping pillar around goaf is determined. Wulanmulun colliery industrial test showed that, both working face and roadways floor heave didn’t occur during cutting through abandoned roadways. Within a total of 10 measuring points arranged, the maximum subsidence is less than 12cm. When pumping pillar has been cut more than 2/3 diameter, buckling collapse occurred. It shows that the pumping pillar has the characteristics of anti-dynamic load, large deformation, good stability and easy cutting, which can meet the needs of surrounding rock control of large section abandoned roadway.

CLC Number:

TD353

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Research and Application of Pumping Pillar Supporting Large Section Abandoned Roadways Technology for Shendong MineArea

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