活鸡兔井22311工作面末采切顶机理分析及解决对策
Mechanism Analysis and Countermeasures of Roof Cutting in 22311 Working Face End Mining of Huojitu Mine
-
摘要: 大柳塔煤矿活鸡兔井所开采的水平煤层属于近距离浅埋煤层群,煤层层间距一般在0~28 m之间,回采下煤层时存在过集中煤柱问题,经常会出现动载矿压、切顶现象。为了探究22煤特殊地段过集中煤柱切顶机理,以22311工作面为原型,通过分析末采期间矿压规律,建立切顶机理力学模型,计算出22311工作面来压步距为8 m,分析了回撤通道2-4联巷切顶、底鼓及片帮发生机理,同时制定了应对和管控措施。Abstract: The horizontal coal seam mining in Huojitu Mine shaft of Daliuta Mine belongs to close distance coal seam group mining, the interval between layers of coal is generally 0 to 28 m, and there is the problem of over concentration of coal pillar when the coal seam is mined, which often results in dynamic load and top cutting. In order to explore the mechanism of top cutting of over-concentrated coal pillar in the special section of 22# coal, a mechanical model of top cutting mechanism was established by taking the 22311 working face as the prototype and analyzing the law of strata behavior during the final mining period. The step spacing of 22311 working face is calculated to be 8 m, and the mechanism of top cutting, floor heave and rib spalling in 2-4 connecting roadway of withdrawal channel is analyzed. Meanwhile, countermeasures and control measures are formulated.
-
Keywords:
- fully mechanized mining face /
- floor heave /
- roof cutting /
- rib spalling /
- dynamic load pressure
-
-
[1] 柴敬,高登彦,王国旺,等.厚基岩浅埋大采高加长工作面矿压规律研究[J].采矿与安全工程学报,2009, 26(4):437-440. [2] 高登彦,高登云,侯志成.特近层间距下煤层综采工作面初采压架机理及处理措施[J].煤炭工程,2015,47(8):64-67. [3] 鞠金峰,许家林,朱卫兵,等.近距离煤层工作面出倾向煤柱动载矿压机制研究[J].煤炭学报,2010,35(1):15-20. [4] 王海山,强岱民,任守忠.近距离煤层同采工作面的合理错距[J].煤矿安全,2002,33(11):26-28. [5] 郭帅,孔宪法,康天合,等.采空区下近距离煤层综采工作面支架载荷分析[J].煤矿安全,2013,44(5):214-217. [6] 张柏林.近距离煤层复杂采空区下工作面安全开采影响因素分析[J].煤矿安全,2018,49(7):212-215. [7] 鞠金峰,许家林,朱卫兵,等.神东矿区近距离煤层出一侧采空煤柱压架机制[J].岩石力学与工程学报,2013,32(7):1321-1330. [8] 高登云,高登彦.大柳塔煤矿薄基岩浅埋煤层工作面矿压规律研究[J].煤炭科学技术,2011,39 (12):20. [9] 谷拴成,王博楠,李金华,等.回撤通道保护煤柱应力分布及其影响因素分析[J].中国煤炭,2017,43 (3):36-40. [10] 谷拴成,王博楠,黄荣宾,等.综采面末采段回撤通道煤柱荷载与宽度确定方法[J].中国矿业大学学报,2015,44 (6):990-995. -
期刊类型引用(2)
1. 闵玉，赵永满，鲁浩男，周雪. 基于组合赋权-VIKOR法的农机企业车间布局研究. 南方农机. 2022(11): 10-15 . 
百度学术
2. 韩玮玮，李永安. VIKOR法在既有建筑节能改造中的应用. 低温建筑技术. 2021(11): 26-30 . 百度学术
其他类型引用(2)
计量
- 文章访问数: 94
- HTML全文浏览量: 0
- PDF下载量: 0
- 被引次数: 4
下载:
