|
|
|
| Research on roof caving mechanism of roadway and application of accident scene management |
| Han Zhengmin |
| Shanxi Hequ Jinshen Ciyaogou Coal Industry Co., Ltd, Xinzhou 036500, China |
|
|
|
|
Abstract In order to explore the roof caving mechanism of roadway and control roof caving accidents, taking 11102 working face of Ciyaogou Coal Mine as the background, numerical simulation, theoretical analysis and on-site roof leakage accident control were studied. The results show that when the surrounding rock deformation occurs, the top angle of the roadway and the two sides bear the double action of tension and shear. With the expansion of tension and shear stress, the deformation of the roadway shows a trend of overall convergence. the roof subsidence is the largest, the convergence value of the two sides is the smallest, and the floor heave value is in the middle; the failure of roadway begins with the collaborative failure of roof, two sides and floor, and gradually develops into the roof deformation. The failure of roadway roof experienced four steps: primary extension, secondary extension, tertiary extension splitting and fracture penetration. The on-site roof fall accident treatment measures are effective, which can provide reference for the corresponding projects.
|
|
|
|
|
|
| 1 ] 马念杰，冯吉成，吕 坤，等. 煤巷冒顶成因分类方法及其支护对策研究[ J ]. 煤炭科学技术，2015，43（ 6 ）：34 - 40.
[ 2 ] 贾明魁. 锚杆支护煤巷冒顶事故研究及其隐患预测[ D ]. 北京：中国矿业大学，2005.
[ 3 ] 惠兴田. 巷道顶板中的自稳隐形拱[ J ]. 建井技术，2000，21（ 5 ）：17 - 19.
[ 4 ] 秦玉红，何荣军. 工作面回采巷道锚杆支护设计数值模拟研究[ J ]. 煤炭科技，2015（ 1 ）：8 - 11.
[ 5 ] 桂祥友，马云东，郁钟铭. 基于可靠性的锚杆支护动态设计与应用研究[ J ]. 金属矿山，2008（ 3 ）：68 - 70，86.
[ 6 ] 王 平，姜福兴，王存文，等. 大变形锚杆索协调防冲支护的理论研究[ J ]. 采矿与安全工程学报，2012（ 2 ）：191 - 196.
[ 7 ] 庞建勇，郭兰波. 煤巷围岩稳定性综合分类及锚杆支护形式合理选择[ J ]. 淮南矿业学院学报，1998，18（ 1 ）：9 - 14. |
|
|
|
