特大断面切眼分次开挖围岩力学行为及围岩控制

Mechanical Behavior and Control of Surrounding Rock in Large Section Open-off Cut Excavation by Times

摘要: 选取山西某煤矿5203切眼为研究对象，数值模拟了大断面切眼一次、二次开挖后围岩的垂直应力、水平应力、塑性区、位移的演化趋势。论述了肩角稳定区作为锚固基础的设计思路，采用桁架锚索与锚网带联合支护技术。工业性试验证明了该类型大断面切眼的围岩控制指导思想和支护技术的科学性。
- 大断面 /
- 切眼 /
- 分次开挖 /
- 联合支护 /
- 围岩控制
Abstract: The 5203 open-off cut of one coal mine in Shanxi province was taken as the project background. The variation characteristics of vertical stress, horizontal stress, tension and shear plastic zone, displacement after once, twice excavation were described. The design idea of taking shoulder angle stability zone as the anchor base and combination support technology of bolt, truss and anchor rope were put forward. The success of industrial test proves that the guiding ideology and support technology are suitable to the large section open-off cut.
- large-section /
- open-off cut /
- excavation by times /
- combination support /
- control of surrounding rock

[1]	阚甲广，张农，李桂臣，等. 深井大跨度切眼施工方式研究[J].采矿与安全工程学报,2009(2):163-167.
[2]	张茂林，庞东林，于德成，等. 综放大断面切眼锚杆参数的研究与应用[J].采矿与安全工程学报, 2008(1): 113-118.
[3]	康红普，王金华，高富强. 掘进工作面围岩应力分布特征及其与支护的关系[J].煤炭学报, 2009(12): 1585-1593.
[4]	杨永康，康天合，柴肇云，等. 8.5 m大断面开切眼支护设计及其稳定性三维数值模拟[J].太原理工大学学报, 2008(S1):105-108.
[5]	刘沛林. 煤矿大断面开切眼锚网支护设计及稳定性分析[J].地下空间与工程学报,2007(S1):1208-1211.
[6]	勾攀峰，侯朝炯. 锚固岩体强度强化的实验研究[J].重庆大学学报:自然科学版,2000(3):35-39.
[7]	何富连，杨绿刚，杨洪增，等. 千米深井大跨度煤巷顶帮桁架联合控制技术[J].中国矿业, 2011(3):65.
[8]	张农，侯朝炯，王培荣. 深井三软煤巷锚杆支护技术研究[J].岩石力学与工程学报, 1999(4): 69-72.
[9]	管学茂，侯朝炯.大断面煤巷桁架锚杆支护的相似模拟试验[J].阜新矿业学院学报:自然科学版, 1997(4): 421-424.