摘要
为研究陕北中小矿井条带保水开采方式中条带煤柱的稳定性,采用相似模拟实验对"采12留8"条带开采中8 m条带煤柱及煤柱削减至6 m及4 m后的煤柱稳定性进行了对比模拟研究。研究结果表明:条带工作面条带煤柱及边界大煤柱构成承担覆岩荷载的整体结构,条带煤柱是主体;条带煤柱尺寸减小首先造成采空区域中部煤柱产生塑性变形,其承受的荷载向其它煤柱转移;4 m条带煤柱造成采空区中部局部条带煤柱首先失稳,进而导致覆岩的瞬间大范围垮落。8 m条带煤柱可保证煤柱长期的稳定性,达到保水开采的目的。
In order to study pillars stability by keeping water in strip mining for small and medium-sized mines in northern Shanxi Province,this paper has made contrast simulation study to stability of strip pillars with 8m,as well as 6m and 4m width adopting mining method of ＂take 12 to remain 8＂.The result shows that the strip pillars and large boundary pillars constitute an overall structure of bearing overburden load at strip mining,and the strip pillars are the main bodies.The pillars in the central mined-out area produced firstly plastic deformation when its size was reduced, and its load would transfer to the other pillars. The 4m strip pillar has caused first instability of local pillars whieh lied in the gob area, and next led to large - scale rock failing after the centre strip pillars have been destroyed. The 8m strip coal pillar ean ensure long - term stability, achieve the purpose of keeping water.
出处
《煤炭技术》
CAS
北大核心
2009年第12期58-61,共4页
Coal Technology
基金
陕西省教育厅产业化培养项目(No.01ZC69)
陕西省重点实验室研究项目(No.02JS44)
西安科技大学博士启动金项目(No.200801)
关键词
保水开采
条带煤柱
支承压力
大范围垮落
mining of keeping water
strip coal pillar
abutment pressure
largescale rock falling
