煤矿安全2019，Vol.50Issue(5)：39-41,46,4.DOI:10.13347/j.cnki.mkaq.2019.05.010
厚煤层综放工作面覆岩运移规律研究
Overburden Movement Law of Fully Mechanized Top Coal Caving Face in Thick Coal Seam
杨皓博 1涂智凌 2高永刚1
作者信息
- 1. 陕西彬长小庄矿业有限公司,陕西 彬县 713500
- 2. 陕西彬长文家坡矿业有限公司,陕西 彬县 713500
- 折叠
摘要
Abstract
According to the occurrence condition and mining layout of coal seams, considering the distribution laws of roof cracks and the influence of mining disturbance, this paper comprehensively analyzes the movement laws of overlying strata in fully mech-anized caving working face in thick coal seams by means of on-site investigation, rock mechanics experiment and numerical cal-culation. The results show that the overburden caving develops uniformly from the center of the goaf to all sides under the action of gravity, and the tensile stress zone of the rock stratum presents U-shaped failure distribution under the action of tensile stress. With the extension of tunneling depth and level, the roof failure zone of the working face is hinged with each other to form a sta-ble structure, which hinders the roof movement. The pressure step distance of the working face is larger, the magnitude of overbur-den caving and rock burst load is larger, and the overburden movement in the middle and upper part of the working face is larger than that in the lower part.关键词
厚煤层/综放工作面/覆岩运移/塑性破坏/数值计算Key words
thick coal seam/fully mechanized caving face/overburden movement/plastic failure/numerical calculation分类
矿业与冶金引用本文复制引用
杨皓博,涂智凌,高永刚..厚煤层综放工作面覆岩运移规律研究[J].煤矿安全,2019,50(5):39-41,46,4.
