文献类型：期刊文献

中文题名：岩溶条件下浅埋近距离煤层开采的数值模拟研究

英文题名：Numerical simulation of shallow buried contiguous seams mining under karst condition

作者：杜学领

第一作者：杜学领

机构：[1]贵州理工学院矿业工程学院,贵州贵阳550003

第一机构：贵州理工学院矿业工程学院

年份：2021

卷号：48

期号：2

起止页码：28-32

中文期刊名：矿业安全与环保

外文期刊名：Mining Safety & Environmental Protection

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：贵州理工学院高层次人才科研启动经费项目(0203001018029);国家安监总局2018年安全生产重大事故防治关键技术科技项目(guizhou-0005-2018AQ)。

语种：中文

中文关键词：岩溶地质;保护层开采;近距离煤层;浅埋煤层;数值模拟

外文关键词：karst geology;protective seam mining;contiguous seams;shallow buried coal seam;numerical simulation

摘要：为研究岩溶条件下煤层开采的采动影响,基于贵州毕节青龙煤矿的地质条件,建立包含岩溶结构的开采模型,模拟研究开采扰动、开采速度、开采方向等因素的影响。研究表明:岩溶结构造成顶板应力突变,突变位置在岩溶与非岩溶边界区域较为明显;岩溶结构正下方煤层内垂直应力相对较小,但外围可能较大,应在到达岩溶结构正下方以前做好防灾准备;浅埋近距离上保护层开采对下部被保护层有较好的卸压效果,但增透效果较为有限;适当提高开采速度有助于缓解顶板的高应力状态,但也会造成下部被保护层增透效果减弱;下部煤层采用与上部煤层相同的开采方向时,安全性相对更高。
In order to study the mining influence under karst conditions,based on the geological conditions of Qinglong Coal Mine in Bijie,Guizhou,a mining model with karst structure was established,and the effects of mining disturbance,mining speed,mining direction and other factors were simulated.The research shows that the karst structure causes the sudden change of the roof stress,and the sudden change position is more obvious in the boundary between karst and non-karst area;the vertical stress in the coal seam directly below the karst structure is relatively small,but the outer periphery may be larger,disaster prevention should be prepared before reaching directly below the karst structure;upper protective layer mining of shallow buried contiguous seams has a better pressure relief effect on the lower protected layer,but the permeability enhanced effect is relatively limited;properly increasing the mining speed will help alleviate the high-stress state of the roof,but it will also reduce the permeability enhanced effect of the lower protected layer;when the lower coal seam adopts the same mining direction as the upper coal seam,the safety is relatively higher.