底板注浆及帮角锚杆加固技术控制巷道底鼓研究
|
摘要
为解决棋盘井煤矿9~#煤层回采巷道底鼓给矿井生产安全带来的不便。通过现场调查、理论分析、数值模拟、摩尔应力圆理论综合分析巷道底鼓机理,找出造成巷道底鼓的原因,确定巷道底鼓类型。提出底板注浆帮角锚杆加固+底板表面浇筑混凝土的方案。利用FLAC~(3D)模拟对比底鼓控制支护技术与底板未支护条件下的在位移量、塑性区、巷道围岩应力状态方面改善明显。通过工程实践监测,此方法控制底鼓成效显著,能有效地减小底板鼓起和巷道变形。
In order to solve floor heave in 9~# coal seam gateway of Qipanjing mine brings inconvenience to the mine production safety. Through field investigation, theoretical analysis, numerical simulation and molar stress circle theory to comprehensive analysis the mechanism of roadway floor heave, find out the causes of floor heave,determine the type of floor heave. Proposed method of floor grouting,angle bolts and pouring concrete on the surface of floor. Use FLAC~(3D) numerical simulation to compare the displacement, the plastic area and the stress state of roadway surrounding rock with the original scheme is improved obviously, and applied to engineering practice. The results of field observation show that this method can effectively control the floor heave and reduce the deformation of floor and roadway.
In order to solve floor heave in 9~# coal seam gateway of Qipanjing mine brings inconvenience to the mine production safety. Through field investigation, theoretical analysis, numerical simulation and molar stress circle theory to comprehensive analysis the mechanism of roadway floor heave, find out the causes of floor heave,determine the type of floor heave. Proposed method of floor grouting,angle bolts and pouring concrete on the surface of floor. Use FLAC~(3D) numerical simulation to compare the displacement, the plastic area and the stress state of roadway surrounding rock with the original scheme is improved obviously, and applied to engineering practice. The results of field observation show that this method can effectively control the floor heave and reduce the deformation of floor and roadway.
引文
[1]安承豪,张德琦,毛佳.基于ANSYS和正交实验法的巷道锚杆支护优化[J].煤矿安全,2013,44(8):36-38.
[2]神文龙,柏建彪,于洋,等.泥质底板动压巷道底鼓机理及控制技术研究[J].煤炭科学技术,2014,42(3):28-31.
[3]李树清.葛泉矿软岩大巷底鼓机理及控制研究[D].长沙:中南大学,2004.
[4]王俊超.高应力软岩回采巷道锚网索耦合支护技术研究[D].西安:西安科技大学,2013.
[5]刘东星,祁乐,李磊.软岩巷道底鼓变形机理与治理技术研究[J].煤炭技术,2015,34(9):92-94.
[6]王卫军,冯涛.加固两帮控制深井巷道底鼓的机理研究[J].岩石力学与工程学报,2005,24(5):808-811.
[2]神文龙,柏建彪,于洋,等.泥质底板动压巷道底鼓机理及控制技术研究[J].煤炭科学技术,2014,42(3):28-31.
[3]李树清.葛泉矿软岩大巷底鼓机理及控制研究[D].长沙:中南大学,2004.
[4]王俊超.高应力软岩回采巷道锚网索耦合支护技术研究[D].西安:西安科技大学,2013.
[5]刘东星,祁乐,李磊.软岩巷道底鼓变形机理与治理技术研究[J].煤炭技术,2015,34(9):92-94.
[6]王卫军,冯涛.加固两帮控制深井巷道底鼓的机理研究[J].岩石力学与工程学报,2005,24(5):808-811.