摘要
以补连塔12511综采工作面为研究对象,采用数值模拟方法研究分析了神东矿区浅埋煤层覆岩运移规律及导水裂缝带发育规律。结果表明,工作面掘进工程中的位移变化趋势整体呈正态分布,覆岩下沉值由工作面开采中心向两帮以先加速后衰减的态势不断增加,最终趋于稳定,其下沉最大值在32~43 mm范围,塑性区控制在煤层及上方覆58.7 m范围内,覆岩垮落表现为“两带”,并未出现弯曲下沉带,对地表影响较小。导水裂缝带高度与采厚、硬岩岩性系数呈较好的线性关系,与工作面斜长呈自然对数函数关系,与采深呈指数函数关系。
Taking Bulianta 12511 fully mechanized mining face as the research object,the laws of overburden movement and water flowing fracture zone development in Shendong mining area are studied and analyzed through numerical simulation method.The results show that the change trend of the displacement in the excavation project of the working face is normally distributed as a whole,and the subsidence value of the overburden increases from the mining center of the working face to the two sides with the trend of accelerating at first and then attenuating,and eventually it tends to be stable,the maximum subsidence is in the range of 32-43 mm,and the plastic zone is controlled within the range of 58.7 m over the coal seam and above.The overburden caving manifests as"two zones",and there is no bending subsidence zone,which has little effect on the surface ground.The height of the water flowing fracture zone has a good linear relationship with the mining thickness and the lithology coefficient of hard rock,and has a natural logarithmic function relationship with the inclined length of the working face,and has an exponential function relationship with the mining depth.
作者
郭瑞瑞
靳志龙
GUO Ruirui;JIN Zhilong(Buertai Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Ordos,Inner Mongolia 017209,China)
出处
《中国煤炭》
2022年第S01期224-234,共11页
China Coal
关键词
浅埋煤层开采
覆岩运移
数值模拟
导水裂缝带高度
影响因素
shallow-buried coal seam mining
overburden movement
numerical simulation
height of water flowing fracture zone
influencing factors
