摘要
通过分析错层位开采采场覆岩结构特点得出,错层位开采采场覆岩结构按接续工作面开采前后可划分为开采前、开采时及开采后3个时期。开采前采场覆岩结构为"O"形,开采时为"L"形,开采后为大"O"形。在此基础上,进一步阐述了错层位开采大"O"形圈的形成原理及特性。通过相似模拟试验,验证了错层位开采相邻工作面之间的顶板垮落是一个连续的整体。研究表明,错层位开采能减少瓦斯抽采钻孔的布置数目并降低由于地表沉陷带来的危害。
It is thought that the structures of overlying strata in fully mechanized sublevel caving faces with stagger arrangement can be divided into three stages,i.e.before mining,in mining and after mining by analysis of mining with stagger arrangement.The structure of overlying strata before mining is O-shaped circle,in mining is L-shaped arch,and after mining is large O-shaped circle.On this basis,the forming principle and its features of large O-shaped circle induced by stagger mining were further expounded.Through the similarity simulation experiment,it was verified that the roof caving between nearby working faces was a continuous entirety.The results showed that stagger mining could reduce the numbers of gas drainage holes and the harms of surface subsidence
出处
《山东科技大学学报（自然科学版）》
CAS
2011年第4期10-16,共7页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51074068)
黑龙江省教育厅基金重点项目(11551z013)
黑龙江省教育厅基金项目(11553087)
关键词
错层位开采
覆岩结构
大“O”形圈
相似模拟
stagger arrangement mining
structure of overlying strata
large O-shaped circle
similarity simulation
作者简介
张俊文（1977-），男，内蒙古凉城人，讲师，博士研究生，主要从事矿山压力与控制方面的研究．E—mail：zhangjunwen1977@163．com．
