专题-厚煤层综采放顶煤矿山压力显现规律浅析.doc
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- 专题 煤层 综采放顶 煤矿 压力 显现 规律 浅析
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1、专题部分厚煤层综采放顶煤矿山压力显现规律浅析马建腾(中国矿业大学矿业工程学院)摘要: 中国具有丰富的天然资源,特别是厚煤层储量占全国煤炭总储量4046的煤炭资源,因此,厚煤层开采技术成为影响中国煤炭行业技术水平的关键因素,同时也影响着行业经济效率。一般的,厚煤层开采与单煤层开采的区别是增加了一倍的单次采高,支架上有一层破碎的顶煤,所以其结构工作面形成负载需要通过直接传递到顶煤顶板的是不再直接支持对象的液压支架,从而显示出采场压力不仅要看直接顶和覆岩运动,而且还依赖于顶煤,发展和支架刚度的顶煤破碎程度的性质。因此,研究了厚煤层开采条件下顶板的活动,分析其矿压显现是必要的。本文共分为五个部分,分别
2、介绍了大采高综放开采的煤岩冒放规律;夹矸厚煤层综放矿压规律;松软厚煤层工作面矿压显现规律;厚煤层综放工作面矿压显现以及特厚煤层综放工作面矿压显现规律,并分别在一些厚煤层矿井生产综放工作面为工程背景进行了浅析,从支架工作阻力分布,以及顶煤顶板运动特征,巷道超前支护段面变形分析回采面矿压显现规律特性,为类似条件下综放工作面安全生产提供参考。关键词:厚煤层,综采放顶煤,矿压显现Abstract : China has abundant natural resources, especially thick coal reserves accounting for 40% of total coal
3、reserves to 46 % of coal resources , so thick seam mining technology has become a key factor affecting the technical level of Chinas coal industry , but also affect the industry economic efficiency. In general, the difference between a single thick seam mining and coal mining is to increase the one-
4、time mining height , with a layer of crushed coal on top of the bracket , so the structure of the face to form the load transmitted directly through the top coal roof is no longer doubled direct support for object hydraulic support , thus showing not only look at the direct pressure of stope roof an
5、d overlying rock movement , but also on the nature of the top level of the top coal crushing coal , development and bracket stiffness . Therefore, the study of the conditions under the roof of thick seam mining activities , analyze its mine pressure behavior is necessary. This paper is divided into
6、five parts , each depicting a large fully mechanized coal caving mining rock caving law ; thick seam partings rock pressure law ; soft thick Coal Seam Strata Behavior ; Thick Coal Seam Strata pressure behavior and special thick coal Seam Strata Behavior , and were in some thick coal mine production
7、of fully mechanized caving face analysis conducted for the engineering background , ranged from support working resistance , as well as roof top coal movement characteristics , roadway forepoling segment surface deformation analysis stopes Strata Behavior characteristics , under similar conditions f
8、or the safe production of fully mechanized caving face reference .Keywords: thick coal seam mechanized caving mine pressure behavior1 综放开采的煤岩冒放规律1.1 影响厚煤层综放开采的煤岩冒放规律的主要因素采矿技术及影响因素的确定在本质上放顶煤开采的因素机械化放顶煤开采领域发生的地质因素。发挥既有客观因素,起决定性作用的因素是地质因素,以及发生的地质因素进行的先决条件放顶煤开采的,它可以在调节人的控制技术因素进行开采,也使厚的大型煤炭必须选择高时,放顶煤开采可以
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