膨胀性软岩巷道断面形状优化及联合支护技术研究
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摘要
针对膨胀性软岩巷道围岩控制难题,利用UDEC数值模拟方法进行巷道断面尺寸优化,选取圆形断面为最优断面形状。采用"锚注+U型钢棚+壁后充填"联合支护技术方案,现场应用表明,加固后的巷道围岩整体变形量小,自稳能力得到有效提升。
Aiming at the problem of roadway swell soft rock controlling,simulation method was used to perform cross-section form optimization,the circular cross-sectional shape was selected. Using "bolt and backgrouting + U-shape Steel support +concrete backfill"combined support technology to control surrounding rock,field application showed that surrounding rock deformation was small after reinforcement,roadway's steady ability was effectively improved.
Aiming at the problem of roadway swell soft rock controlling,simulation method was used to perform cross-section form optimization,the circular cross-sectional shape was selected. Using "bolt and backgrouting + U-shape Steel support +concrete backfill"combined support technology to control surrounding rock,field application showed that surrounding rock deformation was small after reinforcement,roadway's steady ability was effectively improved.
引文
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[2]谷守云,张振全.深部膨胀性软岩巷道变形特征及支护技术[J].煤矿安全,2015,46(1):109-111.
[3]杨晓杰,等.亭南煤矿强膨胀性软岩巷道底臌变形力学机制[J].煤炭学报,2015,40(8):1761-1767.
[4]国兆乾.高膨胀性软岩巷道支护技术研究[J].煤炭工程,2014,(4):38-39.
[5]郑显春,等.软岩巷道支护技术研究[J].煤炭技术,2016,35(4):63-65.
[6]孟庆彬,等.深部高应力软岩巷道断面形状优化设计数值模拟研究[J].采矿与安全工程学报,2012,29(5):650-656.
[7]贺广良,等.弱胶结软岩巷道断面形式及支护优化研究[J].煤炭工程,2017,49(1):38-41.
[8]石蒙.地应力对巷道围岩稳定性的影响及支护对策研究[D].北京:煤炭科学研究总院,2015.