煤炭工程 ›› 2015, Vol. 47 ›› Issue (5): 98-100.doi: 10.11799/ce201505032

• 研究探讨 • 上一篇    下一篇

大倾角煤层俯斜开采顶板破坏机理实验研究

林东才1,王冠赵2,栾恒杰3   

  1. 1. 山东科技大学
    2. 山东科技大学矿业与安全工程学院
    3.
  • 收稿日期:2014-05-20 修回日期:2014-08-22 出版日期:2015-05-11 发布日期:2015-05-20
  • 通讯作者: 林东才 E-mail:990029666@qq.com

SIMILAR MATERIAL SIMULATION OF ROOF MOVEMENT LAWS ON LARGE INCLINATION COAL SEAM WITH DIP MINING

  • Received:2014-05-20 Revised:2014-08-22 Online:2015-05-11 Published:2015-05-20

摘要: 以葛亭煤矿2317工作面大倾角煤层俯采采场为研究对象,采用相似材料模拟和理论分析的方法研究了顶板运动规律、采场覆岩离层的产生、直接顶破坏规律以及基本顶结构动态演化规律。结果表明:大倾角俯斜开采基本顶初次来压步距约50m,周期来压步距约25m,比同等条件下工作面沿倾向布置时的来压步距较长;采场离层带呈“锐角三角形状”,离层由下位岩层开始产生,形成组合结构向上有规律地运动;直接顶不规则冒落的岩石滑向工作面,对工作面不利,同时使原来是基本顶的岩层在工作面推进到一定距离后变成了直接顶,使直接顶位置上移,基本顶结构发生明显运动的区域主要处于倾斜中上部,其在垂直岩层层面内顶板的破断和运动是稳态的,并沿倾向向上位岩层发展呈“阶梯状”。

关键词: 大倾角煤层, 俯斜开采, 覆岩离层, 垮落形态, 基本顶结构

Abstract: Taking the large inclination coal seam with dip mining stope as the research object of 2317 working face of Geting mine ,by using the method of similar material simulation and theoretical analysis,the movement laws of roof ,the tabscission layer of the overlying strata,immediate roof damage rules and dynamic evolution rules of basic roof structure were studied.The results show that the roof weighting interval is longer when adopt dip mining,which the first weighting interval of basic roof is 50m and the periodic weighting interval is 25m;stope abscission layer as "a acute triangle shape" formed composite structure moves regularly from under a rock; immediate roof is Irregular caving then the caving rock are sliding to face,which is bad for working face and basic roof can become immediate roof when working face is advancing to a certain distance to make position of immediate roof up, basic roof structure obvious movement areas mainly in the inclined upper part,basic roof structure in the vertical strata of breakage and movement is steady,basic rock beams develop to the upper strata along the tendency as a "step".

Key words: large dip angle of coal seam, dip mining, strata abscission layer, caving form, basic roof structure

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