采矿与安全工程学报2017，Vol.34Issue(2)：336-341,6.DOI:10.13545/j.cnki.jmse.2017.02.020
注浆加固套管抗弯性能对煤层底板变形的影响
The effect of flexural behavior of the grouting reinforcement casing on coal seam floor deformation
摘要
Abstract
In view of the failure form of the coal seam floor, in-situ grouting engineering, and the cas-ing arrangement, the floor grouting casing pipe physical model was established. The casing was divided into segments and stress analysis was carried out; the action and reaction mechanism of the casing and the surrounding rock is clarified; The grouting casing deformation characteristics were recognized and determined as an important index to measure the deformation and failure of the grouting reinforcement floor; the formula for the maximum displacement of the allowable bottom plate of the casing is derived theoretically; finally the effect of typical mining grouting casing on the floor deformation was obtained numerically. The data have shown that the vertical displacement quantity of the monitoring points lo-cated in the active zone, the passive zone and the transitional zone of the floor respectively changed by 20%, 23.2% and 27.5% after the casing was applied. This fully proves the transition zone is the key re-gion of the coupling between casing and surrounding rock.关键词
煤矿开采/注浆加固/套管/底板变形/物理模型Key words
coal mining/grouting reinforcement/casing pipe/floor deformation/physical model分类
矿业与冶金引用本文复制引用
李见波,许延春,王新梅..注浆加固套管抗弯性能对煤层底板变形的影响[J].采矿与安全工程学报,2017,34(2):336-341,6.基金项目
国家自然科学基金项目(51504095) （51504095）
廊坊市科学技术研究与发展计划项目(2016011013) （2016011013）
中央高校基本科研业务费项目(3142015082) （3142015082）
