摘要
为研究大倾角煤层开采的地表沉陷及岩层运移特征、保护地表建构筑物,采用数值模拟计算、基于Konthe时间函数的动态预计和基于概率积分法的地表沉陷软件计算等方法进行了系统研究。数值计算结果表明,大倾角煤层开采时受非均布载荷作用,垮落岩层绕下铰接点回转,造成上山边界处地表下沉较大而下山边界处地表下沉较小。动态预计和地表下沉软件预测结果表明,开采影响范围内的西土山中心小学和高层建筑的地表变形均处于Ⅰ级以内,影响轻微。基于概率积分法的地表沉陷预计得出,工作面浅部地表下沉明显大于深部,而小学和高层建筑均处于深部边界对应的地表位置,这与数值计算结果相吻合,将大大减小工作面开采对地表建筑物的影响。
In order to reveal the regulation of surface subsidence and rock strata movement in mining coal seam with large dip angle and protect surficial construction, numerical simulation, dynamic prediction based on Konthe time function and surface subsidence software using probability integral method were applied. Numerical calculation demonstrates that broken strata rotates about lower hinge point under the uniform load, which leads to the results that the subsidence on rise border is greater than that in dip border. Both the dynamic prediction and software calculation shows that, the subsidence is within Level one at Xitushan Central Primary School and high-rise buildings, which is of slight influence. Subsidence prediction based on probability integral method concludes that subsidence on superficial part is evidently larger than that on deep border, which coincides with the numerical simulation, and the effect of coal mining on surface buildings is non-significant as the primary school and high-rise building locates over the deep border.
作者
张海洋
李小萌
孙利辉
ZHANG Hai-yang;LI Xiao-meng;SUN Li-hui(Handan Yunjialing Mine,Jizhong Energy Resource Co.,Ltd.,Handan 056302,China;College of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056038,China;Collaborative Innovation Center of Comprehensive Development and Utilization of Coal Resource of Hebei Province,Handan 056038,China)
出处
《煤炭工程》
北大核心
2022年第6期108-112,共5页
Coal Engineering
基金
国家自然科学基金面上资助项目(52074100,51874113)
河北省重点研发计划资助项目(19275508D)。
关键词
大倾角煤层
开采沉陷
覆岩运移
“三下”开采
地表变形
steeply inclined coal seam
mining subsidence
movement of overlying strata
coal mining under buildings
railways and water-bodies
surface deformation
