摘要
在现场观测及实验研究基础上,对急倾斜水平分段放顶煤开采过程中顶煤体结构进行了研究。研究表明,支架上方顶煤体中能够形成“拱”结构,该结构的存在将对工作面矿山压力显现产生显著影响。并提出了顶煤体中“跨层拱”结构的力学模型,指出了影响结构特征的相关因素。认为“跨层拱”是顶煤体开采过程中经历平衡—失稳—再平衡—再失稳的上移结构,所在分段煤体中的拱结构受上方采空区煤矸的重压及顶底板的挤压作用,其最终失稳是必然的。
Base on the site observation and experimental research, the paper studied the top coal structure for the top coal caving mining in steep inclined seam sections. The research results showed that an arch structure would be formed in the top coal above the supports. Such structure existed will have obvious influence to the mine pressure behavior occurred in the coal mining face. The paper provided the mechanics model of the multi strata arch structure in the top coal and pointed the related factors of the influence structure features. The paper held that the multi strata arch was a balance to unbalance to balance to unbalance upward structure occurred during the top coal mining process. The arch structure in the sectional seam was subjected to the loading pressure from the above goaf and would be certain to be failed in final.
出处
《煤炭科学技术》
CAS
北大核心
2006年第7期4-7,共4页
Coal Science and Technology
基金
国家自然科学基金资助项目(50274058)
2005年高等学校博士点专项基金资助项目(20040704002)
关键词
水平分段放顶煤
矿压显现
跨层拱
拱跨比
回归分析
top coal caving in horizontal sectional seam
pressure behavior
multi strata arch
arch ratio
regressive analysis
