Shanxi Lingshi Huaying Tianxing Jiguang Coal Industry Company Limited School of Energy and Safety, Anhui
University of Science and Technology

为得到极近距离煤层不同采煤工艺下联合开采工作面矿压显现规律,采用现场实测法对错距为20 m的上下煤层工作面进行矿压观测,通过观测得出上煤层因为采高小、顶板坚硬,造成工作面没有明显的初次来压和周期来压,超前影响剧烈范围为工作面前方20 m,工作面巷道围岩塑性区深度为1.5~2.0 m;下煤层工作面初次来压和平均周期来压步距分别为27.4和15.5 m,超前剧烈影响范围为工作面前方30 m,工作面巷道围岩塑性区深度2 m,在这种条件下,20 m锚距是不合理的。

In order to obtain mine strata behavior law of combined mining face in ultra contiguous seams under different coal mining techniques, the site measuring method was applied to mine strata pressure observation on a coal mining face in seams with a displaced distance of 20 m between the upper seam and the lower seam. The observation results showed that due to the upper seam had a low mining height and a hard roof, which led to there was no obvious primary roof weighting and no p eriodical roof weighting, an advance influence serious scope of the roof weighting was 20 m in front of the coal mining face and a depth of the plastic zone in the gatew ay of the coal mining face was 1. 5 ~ 2.0 m. A primary roof weighting and average periodical roof weighting of the coal mining face in the lower seam was 27.4 m and1 5.5 m in step individually, an advance influence serious scope of the roof weighting was 30 m in front of the coal mining face and a depth of the plastic zone in the gate way of the coal mining face was 2 m. Thus under above conditions, a displaced distance of 20 m was irational.

国家自然科学基金资助项目(51004002)；高等学校博士点新教师基金资助项目(20103415120001)；安徽省高校省级自然科学研究基金资助项目(KJ2012A088)；