摘要
以大同矿区同忻煤矿石炭系坚硬覆岩特厚煤层开采为工程背景,基于关键层理论分析了同忻矿3-5#煤层特厚煤层综放开采坚硬覆岩的破断特征和采场覆岩结构特征;应用弹性板理论,建立了大空间采场坚硬覆岩柱壳结构力学模型和数学模型.研究表明:坚硬覆岩柱壳结构模型,较好地揭示了同忻矿8105,8106等工作面开采过程中产生大小周期来压、采动影响范围大、易产生冲击载荷等特殊矿压现象的机理.
The fully mechanized top coal caving mining method was used to mine the extra thick3-5#coal seam in Tongxin mine,and the failure and structure characteristics of hard overlying strata were studied based on the key strata theory.Using the elastic slab theory,mathematical models of cylindrical shell structure in the hard overlying strata were developed for the carboniferous extra thick coal seam with hard overlying strata in Datong mining area.The results show that some special weighting phenomena often occur in Panels 8105 and 8106 in Tongxin coal mine,including the large and small periodic weightings,large mining influenced area and rock bursts,and the cylindrical shell structure model of hard overlying strata can better confirm this mechanism.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2017年第6期1226-1230,共5页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(51674135)
三晋学者计划专项资金项目(2050205)
辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金项目(LNTU15KF03)
关键词
坚硬顶板
特厚煤层
柱壳结构
力学模型
hard roof
extra thick seam
cylindrical shell structure
mechanical model
