煤炭技术
煤炭技術
매탄기술
Coal Technology
2015年
11期
4-6,7
,共4页
厚煤层%采高效应%离散元%采出率
厚煤層%採高效應%離散元%採齣率
후매층%채고효응%리산원%채출솔
thick coal seam%effection of mining height%discrete element%recovery rate
通过理论分析并运用FLAC3D模拟软件模拟分析了围岩稳定性的采高效应;运用PFC2D离散元模拟软件,模拟分析了顶煤回收率的采高效应。研究表明:随着截煤高度增大,高应力集中区的高度和深度都相应的增加,工作面煤壁靠上位置的煤体位移也随着逐渐增大;明确了顶煤与覆岩在综放开采中的运移形态和规律;随着机采高度的增加,顶煤回收率逐渐升高,但增幅逐渐减小。综合考虑确定机采高度为3m。
通過理論分析併運用FLAC3D模擬軟件模擬分析瞭圍巖穩定性的採高效應;運用PFC2D離散元模擬軟件,模擬分析瞭頂煤迴收率的採高效應。研究錶明:隨著截煤高度增大,高應力集中區的高度和深度都相應的增加,工作麵煤壁靠上位置的煤體位移也隨著逐漸增大;明確瞭頂煤與覆巖在綜放開採中的運移形態和規律;隨著機採高度的增加,頂煤迴收率逐漸升高,但增幅逐漸減小。綜閤攷慮確定機採高度為3m。
통과이론분석병운용FLAC3D모의연건모의분석료위암은정성적채고효응;운용PFC2D리산원모의연건,모의분석료정매회수솔적채고효응。연구표명:수착절매고도증대,고응력집중구적고도화심도도상응적증가,공작면매벽고상위치적매체위이야수착축점증대;명학료정매여복암재종방개채중적운이형태화규률;수착궤채고도적증가,정매회수솔축점승고,단증폭축점감소。종합고필학정궤채고도위3m。
Analyze the stability of surrounding rock under the different mining height by theoretical and numerical simulation FLAC3D,and analyze the top-coal under the different mining height by numerical simulation of discrete element PFC2D. With the increase of mining height,the region and depth of stress concentration is corresponding increasing,and the recovery rate of top-coal is also increasing with the increase of mining height,but the growth of it is decreasing in this process. Finally ,determine that mining height should be 3 m.