特厚煤层综放工作面侧向煤体应力时空演化特征  

Temporal and spatial evolution characteristics of lateral coal stress in fully mechanized top coal caving mining working face in ultra-thick coal seam

作　　者：何团 黄志增[2] 李春睿[2] 洛锋 王东攀[2] 

机构地区：[1]河北工程大学矿业与测绘工程学院,河北省煤炭矿井建设工程技术研究中心,河北邯郸056038 [2]煤炭科学研究总院开采设计分院,北京100013

出　　处：《采矿与安全工程学报》2018年第1期100-105,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51504135);煤炭科学研究总院科技创新基金项目(2015ZYJ001);河北省自然科学基金项目(E2017402166)：邯郸市科学技术研究与发展计划项目(1629209045-2)

摘　　要：厘清工作面侧向煤体应力时空演化特征是确定特厚煤层综放工作面区段煤柱合理留设宽度的基础。论文结合工作面侧向煤体应力形成过程的时间序列,理论分析了工作面侧向煤体应力演化过程。建立了特厚煤层综放工作面沿空侧覆岩结构-侧向煤体应力时空传递模型,提出了侧向煤体应力的定量化计算公式,得到:低位悬臂块体是侧向浅部煤体高应力的主因;高位悬臂块体是侧向深部煤体高应力的主因;悬臂块体发育高度越大,附加应力在侧向煤体中传播距离越远。进行影响3107工作面侧向煤体应力的主控影响因素分析,各因素影响程度依次为:岩层破断角>悬臂块体厚度>基岩移动角。To understand the temporal and spatial evolution characteristics of lateral coal stress is a ba- sis of determining the reasonable size of barrier pillar of a fully mechanized top coal caving mining working face. Based on the time series of lateral coal stress formation in the face, the stress evolution process of the lateral coal face is theoretically analyzed. The establishment of time transfer model of the gob side overburden structure - lateral coal stress in the ultra-thick seam is proposed and the quantitative lateral coal stress calculation formula is presented, which yields： the primary reason of shallow coal lat- eral high stress is the low cantilever block; the deep coal lateral high stress is because of the high canti- lever block; the increasing cantilever block could reduce the additional stress spreading farther away. The main influence factors of lateral coal stress in No.3107 working face are analyzed and their order isas： rock breaking angle 〉 cantilever block thickness 〉 bedrock movement angle.

关 键 词：特厚煤层 侧向煤体 覆岩结构 支承压力 应力演化特征 

分 类 号：TD353[矿业工程—矿井建设]