密实充填采煤沿空留巷巷旁支护体合理宽度研究  

The rational width of the support body of gob-side entry in fully mechanized backfill mining

作　　者：张吉雄[1] 姜海强[1] 缪协兴[1] 周楠[1] 昝东峰 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116 [2]中煤西安设计工程有限责任公司,陕西西安710054

出　　处：《采矿与安全工程学报》2013年第2期159-164,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51074165);教育部新世纪优秀人才支持计划项目(NCET-11-0728);江苏省普通高校研究生科研创新计划项目(CXZZ12_0952);江苏高校优学科建设工程项目

摘　　要：基于固体密实充填采煤的覆岩移动规律,分析了沿空留巷围岩变形特征及巷旁支护体的作用机理,得出夯实机构夯实充填体而传递来的侧压力是导致巷旁支护体失稳和变形的主要因素,据此建立了侧向压力与巷旁支护体稳定性力学模型,推导出巷旁支护体宽度计算公式。根据花园煤矿的具体条件,对不同宽度巷旁支护体的变形特征进行了数值模拟分析。结果表明,当支护体宽度大于2.5 m并采用锚带网联合支护加固后,侧压力引起的巷旁支护体变形可得到有效控制。现场工程实践证明该项技术成功有效,巷旁支护体稳定性力学模型及宽度计算公式合理。In this paper,we analyzed the surrounding rock deformation features of retained entry and the action mechanism of gob-side support body based on the strata movement characteristics in solid backfill mining.The main factor influencing the deformation and instability of the support body is the lateral force caused by tamping operation.A mechanical model of support body stability influenced by lateral force was established,and the width calculation formula of the support body was deduced.The deformation of the support bodies of different widths was analyzed using numerical simulation method with relevant parameters of Huayuan mine.The result shows that the deformation of the support body can be effectively controlled when its width is more than 2.5 m and it is supported by bolts together with bands and net.The field test proves that the technology is successful and effective;the mechanical model of support body stability as well as the width calculation formula is rational.

关 键 词：固体充填采煤 沿空留巷 巷旁支护体 合理宽度 

分 类 号：TD822[矿业工程—煤矿开采]