摘要
为了研究超长工作面开采覆岩两带变形破坏特征以及矿压差异性变化规律,以袁大滩煤矿为背景,采用数值模拟软件建立不同工作面长度的数值计算模型,研究不同宽度工作面条件下的围岩的破坏情况,为工作面合理宽度选择提供一定的科学依据。结果表明,工作面开采的宽度与覆岩两带发育高度、位移变化范围、应力大小形呈正比关系,同时随着开采宽度增加应力区域范围扩大,弹性能峰值普遍增加,尤其是开采宽度达到450 m后,其弹性能的能量增幅明显;工作面面宽越大时,宽度增加引起两带高度的增幅逐渐减小、位移变化区域范围增量相对越小,同时应力区域范围的增加幅度逐渐减小;在合理的现场防控措施下,400 m工作面宽度能较好地满足工作面的安全高效生产。研究成果可为袁大滩煤矿工作面宽度取值范围的合理选取提供指导。
In order to study the deformation and failure characteristics of the two zones of overlying rock in ultra-long working face mining and the variation law of ore pressure difference.Taking Yuandatan Coal Mine as the background,the numerical calculation model of different length of working face was established by using numerical simulation software,and the failure of surrounding rock under different width of working face was studied,providing certain scientific basis for the reasonable width selection of working face.The results show that:the mining width of the working face is directly proportional to the development height,the displacement change range and and the magnitude of stress of the two zones of overlying rock.At the same time,with the increase of mining width,the range of stress area expands,and the peak value of elastic energy generally increases,especially after the mining width reaches 450 m.With the increase of the working area width,the increase of the height of the two zones gradually decreases,the change of the displacement region is relatively small,and the increase of the stress region is gradually reduced.Under reasonable on-site prevention and control measures,400 m working face width can better meet the safe and efficient production of working face,and the research conclusions can provide guidance for the reasonable selection of the range of working face width in Yuandatan Coal Mine.
作者
白云虎
刘涛涛
李苏珍
宗程
Bai Yunhu;Liu Taotao;Li Suzhen;Zong Cheng(Yulin Yuyang Zhongneng Yuandatan Mining Co.,Ltd.,Yulin 719000,China;College of Energy Engineering,Xi′an University of Science and Technology,Xi′an 710054,China)
出处
《能源与环保》
2024年第7期243-253,共11页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
国家自然科学基金项目(51874231)
陕西省创新能力支撑计划(2020KJXX-006)
陕煤联合基金(2019JLZ-04)。
关键词
超长工作面
工作面宽度
数值模拟
覆岩两带
矿压
ultra-long working face
width of working face
numerical simulation
two zones of overlying rock
mine pressure
