本文選題：大傾角 + 綜放開采　； 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：煤炭是不可再生資源,因此在其開采過程中應(yīng)盡可能地采出煤炭、減少資源浪費(fèi)。綜放開采過程中合理的工藝參數(shù)能大大地提高煤炭的采出率。目前,國(guó)內(nèi)外學(xué)者的研究方向大多是大傾角或者特厚煤層條件下綜放開采過程中應(yīng)力分布以及礦壓顯現(xiàn),對(duì)于大傾角特厚煤層綜放開采工藝參數(shù)的研究較少,不能有效地指導(dǎo)現(xiàn)場(chǎng)實(shí)踐。本文以孟家窯5號(hào)煤大傾角特厚煤層綜放開采為背景,采用物理模擬和數(shù)值模擬相結(jié)合的方法,對(duì)大傾角特厚煤層綜放工作面的煤矸流場(chǎng)特征、合理采放比、放煤步距及放煤方式等進(jìn)行了研究,確定了合理的綜放開采工藝參數(shù),提高了煤炭采出率,減少了資源的浪費(fèi)。主要研究?jī)?nèi)容及成果如下:(1)通過建立物理相似模擬試驗(yàn)?zāi)Ｐ?研究不同采放比及不同放煤步距下的煤矸流場(chǎng)特點(diǎn)以及頂煤放出率和含矸率,初步確定采高為4.0m,采放比為1:2.4,放煤步距為兩采一放。(2)鑒于實(shí)驗(yàn)室物理模擬試驗(yàn)可能會(huì)受到環(huán)境因素以及人為操作失誤的影響,通過計(jì)算機(jī)離散元數(shù)值模擬方法再次研究不同采放比及不同放煤步距下的頂煤放出率,結(jié)果驗(yàn)證了實(shí)驗(yàn)室物理相似模擬的正確性。(3)通過理論分析與離散元數(shù)值模擬相結(jié)合的方法,研究?jī)A角變化的情況下不同放煤方式、放煤輪次及放煤方向情況下的煤矸流場(chǎng)特征及頂煤放出率,確定合理的放煤方式為:煤層傾角小于35°時(shí)選取單輪順序上行放煤方式,在煤層傾角大于等于35°選取雙輪順序上行放煤方式。本文的研究成果為孟家窯大傾角特厚煤層綜放工作面的開采提供借鑒和參考,對(duì)保證礦井的安全高效生產(chǎn)具有重要意義。
[Abstract]:Coal is a non-renewable resource, so it is necessary to extract coal as much as possible and reduce the waste of resources.Reasonable technological parameters in the process of fully mechanized caving mining can greatly improve the coal extraction rate.At present, most of the research directions of domestic and foreign scholars are stress distribution and mine pressure appearance in the process of fully mechanized caving mining under the condition of large dip angle or super thick coal seam, but less research on the technological parameters of fully mechanized caving mining in high dip and extra thick coal seam.Can not effectively guide the field practice.In this paper, based on fully mechanized caving mining of Mengjiayao No. 5 coal seam with large dip angle and extra thick coal seam, using the method of combining physical simulation and numerical simulation, reasonable mining and caving ratio of coal and gangue flow field characteristics of fully mechanized caving face with large dip angle and extra thick coal seam are analyzed.Based on the study of coal drawing distance and coal drawing method, reasonable technological parameters of fully mechanized caving mining are determined, the coal extraction rate is improved and the waste of resources is reduced.The main research contents and results are as follows: (1) by establishing the physical similarity simulation test model, the characteristics of coal gangue flow field under different mining / drawing ratio and different coal drawing distance, as well as the top coal extraction rate and the gangue content rate are studied.It is preliminarily determined that the mining height is 4.0 m, the ratio of mining to caving is 1: 2.4, and the step distance of coal drawing is two mining and one caving. (2) in view of the fact that the laboratory physical simulation test may be affected by environmental factors and human error,Through the computer discrete element numerical simulation method, the caving rate of top coal under different mining / drawing ratio and different coal drawing step distance is studied again.The results show that the laboratory physical similarity simulation is correct. (3) by combining the theoretical analysis with the discrete element numerical simulation, the different coal drawing methods under the condition of the variation of inclination angle are studied.The characteristics of coal gangue flow field and the top coal caving rate under the condition of coal drawing wheel and coal drawing direction are determined as follows: when the coal seam inclination angle is less than 35 擄, the single wheel sequential upward caving mode is selected.When the dip angle of coal seam is greater than or equal to 35 擄, the two wheel sequential upward caving mode is selected.The research results of this paper provide reference and reference for the mining of fully mechanized caving face in Mengjiayao large dip angle and super thick coal seam, which is of great significance to ensure the safe and efficient production of the mine.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD823

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王家臣;陳yN;張錦旺;;基于BBR的特厚煤層綜放開采放煤方式優(yōu)化研究[J];煤炭工程;2016年02期

2 苑搏;張國(guó)軍;李賽;熊曉峰;張春雷;;放煤順序?qū)Υ髢A角走向長(zhǎng)壁綜放開采放出率的影響[J];煤礦安全;2015年12期

3 王家臣;張錦旺;;急傾斜厚煤層綜放開采頂煤采出率分布規(guī)律研究[J];煤炭科學(xué)技術(shù);2015年12期

4 王金安;張基偉;高小明;文建東;古亞丹;;大傾角厚煤層長(zhǎng)壁綜放開采基本頂破斷模式及演化過程(Ⅱ)——周期破斷[J];煤炭學(xué)報(bào);2015年08期

5 王金安;張基偉;高小明;文建東;古亞丹;;大傾角厚煤層長(zhǎng)壁綜放開采基本頂破斷模式及演化過程(Ⅰ)——初次破斷[J];煤炭學(xué)報(bào);2015年06期

6 王家臣;張錦旺;;綜放開采頂煤放出規(guī)律的BBR研究[J];煤炭學(xué)報(bào);2015年03期

7 張寧波;劉長(zhǎng)友;陳玉明;;不穩(wěn)定厚煤層放頂煤開采煤矸流場(chǎng)規(guī)律的數(shù)值模擬研究[J];煤炭技術(shù);2014年12期

8 伍永平;劉孔智;，

本文編號(hào)：1742081