文档介绍：
大采高综采采场顶板结构特征与支架合理
承载研究#
袁永1,2,张小刚1,王权1*
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(1. 中国矿业大学矿业工程学院,江苏徐州 221116;
2. 中国矿业大学,深部煤炭资源开采教育部重点实验室,江苏徐州 221116)
摘要:为确定大采高综采支架合理工作阻力,采用理论分析与现场实测相结合的方法,研究
了大采高综采采场顶板结构特征与支架合理承载。根据直接顶中厚硬岩层对覆岩垮落具有重
要影响的特点,提出了直接顶关键层的概念与判别方法,依据是否存在直接顶关键层对直接
顶分类并计算支架工作阻力。结果表明:Ⅰ类无直接顶关键层条件下,基本顶破断形成单层
的“砌体梁”结构,其采场支架工作阻力可按 6~8 倍采高的岩柱重量计算;Ⅱ类有直接顶
关键层条件下,顶板形成由直接顶关键层与基本顶破断组成的双层“悬臂梁-砌体梁”结构,
其采场支架工作阻力的计算需考虑直接顶关键层厚度、强度与层位的影响,直接顶关键层强
度越大、厚度越大、层位越低,采场所需支架工作阻力越大。上述研究成果在典型条件大采
高综采支架工作阻力确定中得到成功应用。
关键词:采矿工程;大采高综采;直接顶关键层;直接顶分类;支架工作阻力;冲击动载荷
中图分类号:TD324
Research on reasonable support load and the characteristics
of the roof in fully mechanized mining with large mining
height
YUAN Yong1,2, ZHANG Xiaogang1, WANG Quan1
(1. School of Mines,China University of Mining & Technology, JiangSu XuZhou 221116;
2. Key Laboratory of Deep Coal Resource Mining Ministry of Education of China, China
University of Mining & Technology, JiangSu XuZhou 221116)
Abstract: In order to determine the reasonable support load, research on the reasonable support
ability and the characteristics of the roof in fully mechanized mining with large mining height
were conducted by means of theoretical analysis and in-situ measurement. We put forward the
concept and discriminant methods of key stratum of immediate roof (KSIR) according to the fact
that the existence of the hard strata with medium or thick thickness has vital influence on the
collapse of overlying strata. Roof is classified into two types based on whether the KSIR exists or
not, working resistances of supports is determined as well. Type Ⅰ with no KSIR exist. Main roof
broke and formed a single layer bond-beam structure, working resistances of supports can be
calculated according to the weight of rock pillar with 6~8 times of mining height. TypeⅡ with the
existence of KSIR, a double layer bond-beam structure is formed with the break of the KSIR and
the main roof, working resistances of supports is calculated with t