近距离煤层群同采工作面错距布置研究

发布时间：2018-01-17 21:18

本文关键词：近距离煤层群同采工作面错距布置研究　出处：《太原理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：我国是一个煤炭资源丰富的大国,煤层赋存条件复杂,地质条件差异较大,开采工艺各不相同。随着科学技术的发展,各生产矿井的产量与采掘机械化程度的不断提高,大多数埋深浅和开采条件好的煤层大量减少,目前的开采主要都针对埋藏深及开采条件复杂的煤层,其中近距离煤层群开采占有较大比例。近距离煤层群的开采中同采方式的运用较为普遍,而在开采过程中,上部煤层开采对原岩应力状态产生了破坏,造成底板应力重新分布,对下部煤层的开采有较大的影响。所以针对近距离煤层群的开采,还有许多亟待完善之处,所以对近距离煤层群的开采研究是以后发展的一个重要方面。本论文基于山西灵石华苑煤业作为工程背景,主要运用理论研究、数值模拟的方法结合工程实践的验证,来进行研究分析工作。成果如下:(1)借鉴国内学者提出的近距离煤层群同采时上下工作面压外式错距和压内式错距布置的理论计算式,对错距理论分析并结合华苑煤业的实际情况,研究了两种错距的影响因素,同时得出华苑煤业9#、10#煤层同采时,上下工作面压外式布置最小理论错距为21.63m,上下工作面压内式布置最小理论错距为10.64m。(2)针对两种错距布置方式的适用情况进行了初步归纳:压外式错距布置适用于近距离煤层群煤层之间夹层厚度各异的情形中,顶板完整结构不好、矿压显现比较显著的煤矿。反之,则适用于压内式错距布置形式,而且压内式错距布置形式对具有近距离煤层群同采条件的带压开采等复杂开采情况的煤矿生产相对有利。(3)利用UDEC数值模拟软件,针对上下工作面超前布置距离、煤层间夹层厚度这两个变量,研究不同的模拟模型下工作面矿压显现状况,一方面分析了错距大小、夹层厚度各异时,工作面矿压显现的规律;一方面也对前面的理论推导进行了简单的验证。根据上面的研究成果,加之矿井开采实例的补充分析,在一定程度上解释了近距离煤层群同采时的一些问题,为以后近距离煤层群同采的生产实际提供一定的参考意义。
[Abstract]:China is a large country rich in coal resources, coal seam occurrence conditions are complex, geological conditions are quite different, mining technology is different. With the development of science and technology. With the increasing production and mechanization of mining, most coal seams with shallow buried depth and good mining conditions have been greatly reduced. At present, the mining is mainly aimed at the coal seams with complex mining conditions and buried depth. In the process of mining, the upper coal seam mining destroyed the stress state of the original rock. Because of the redistribution of floor stress, which has a great impact on the mining of the lower coal seam, there are still many areas to be improved urgently for the mining of the coal seam group in close distance. Therefore, the research on the mining of coal seam group is an important aspect of the future development. This paper based on the Lingshi Huayuan coal industry in Shanxi as the engineering background, mainly using the theory research. The method of numerical simulation is combined with the verification of engineering practice. The results are as follows: 1) drawing lessons from domestic scholars' theoretical formulas for the arrangement of pressure and internal fault distance between upper and lower face when coal seam group is in close mining. Based on the analysis of the right and wrong distance theory and the actual situation of Huayuan coal industry, the influence factors of two kinds of offset are studied, and the time of coal seam mining in Huayuan coal industry is obtained at the same time. The minimum theoretical error distance of pressure-external arrangement in upper and lower face is 21.63 m. The minimum theoretical error distance of the internal arrangement of the upper and lower face is 10.64 m 路m ~ 2). In this paper, the application of two kinds of staggered distance arrangement is preliminarily summarized: the pressure-outer offset arrangement is suitable for the different thickness of intercalation between coal seams of short distance coal seams. If the roof is not well constructed and the mine pressure is obvious, it can be used in the layout of internal pressure misalignment. Moreover, the layout form of internal pressure offset is relatively advantageous to the production of coal mines with complex mining conditions such as pressure mining with close distance coal seam group.) the UDEC numerical simulation software is used. Aiming at the two variables of the advance arrangement distance between the upper and lower face and the interlayer thickness between the coal seams, this paper studies the mine pressure behavior of the working face under different simulation models. On the one hand, the size of the offset and the thickness of the interlayer are analyzed. The law of mine pressure appearance in working face; On the one hand, the theoretical derivation in front of the simple verification. According to the above research results, combined with the supplementary analysis of mine mining examples, to some extent, explained some problems of coal seam group mining in the same time. It provides some reference significance for the production of coal seam group in the future.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD823.81

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