矿业科学学报2018，Vol.3Issue(3)：268-276,9.DOI:10.19606/j.cnki.jmst.2018.03.008
推采陷落柱工作面覆岩异常破坏规律研究
Study on abnormal failure laws of overlaying strata under directly passing collapse column
摘要
Abstract
When the working face passes a non-water filled collapse column, the overlaying strata of the working face can be damaged abnormally owing to the mining influence, which inevitably induces water inrush disaster. To study the abnormal failure laws of overlaying strata, the Jingfang coal mine was chosen as the engineering background in the study. A collapse column-surrounding rock fissure mechanical model was built by fully considering the formation of collapse column and geological characteristics of its surrounding rocks. Based on this model, the abnormal failure laws of overlaying strata were analyzed theoretically by combination of physical and numerical simulations. The results indicate that collapse column-surrounding rock fissure field and the mining fissure field were existent in the overburden rock with their own fracture distribution features. Under the influence of mining, some new destruction features were developed under the action of coupled fracture fields and the variation of collapse columnsurrounding rock fissures. A concentrated destruction occurred around the collapse column. The new born fissures of bed-separated near the column side and longitudinal broken fissures were interconnected with the above two fissure fields. At the top of the column, the two types of new born fissures could be interconnected. The connected fissures around the collapse column and top of rock mass gradually increased, which caused the hydraulic conductivity to be enhanced and the risk of water-inrush from roof to be increased.关键词
陷落柱/相似模拟/数值模拟/覆岩裂隙Key words
collapse column/physical simulation/numerical simulation/overlaying strata fissure分类
矿业与冶金引用本文复制引用
许延春,曹光明,张星宇,端恒,刘世奇..推采陷落柱工作面覆岩异常破坏规律研究[J].矿业科学学报,2018,3(3):268-276,9.基金项目
国家重点基础研究发展计划(973计划)(2013CB227903) （973计划）
国家自然科学基金煤炭联合基金重点项目(U1361209) （U1361209）
