【摘要】：為了探索薄煤層刨煤機刨刀刨削煤巖的破碎過程及其力學(xué)特性,基于有限元數(shù)值仿真分析方法分析煤巖截割過程的顯示動力特性。依據(jù)煤巖三向應(yīng)力測試試驗,構(gòu)建出基于Drucker Prager準則的煤巖本構(gòu)模型。以煤巖刨削截深、煤巖刨削速度、刨刀前角為水平因素設(shè)計單因素仿真分析試驗,實現(xiàn)煤巖破碎形態(tài)與刨刀煤巖截割力的研究。研究結(jié)果表明:煤屑塊度與煤巖刨削截深有關(guān),隨著截深的增大,塊度增大;隨著刨削速度的增加,煤屑的塊度變化趨勢不明顯,煤巖在α=30°刨刀作用下,截割剝離煤屑塊度較大;刨刀煤巖截割負載隨著截深的增大而增大;隨著轉(zhuǎn)速與截割深度的增加,前角為30°的刨刀負載呈線性上升趨勢。
[Abstract]:In order to explore the crushing process and mechanical characteristics of coal and rock in thin coal planer, the dynamic characteristics of coal and rock cutting are analyzed based on finite element numerical simulation method. Based on the three dimensional stress test of coal and rock, the constitutive model of coal and rock is constructed based on Drucker Prager criterion. The single factor simulation analysis test is designed with the horizontal factors of coal and rock cutting depth, coal and rock cutting speed and planer angle as horizontal factors to realize the research of coal rock breakage morphology and cutting force of coal and rock planer. The results show that the size of coal debris is related to the cutting depth of coal and rock, and increases with the increase of cutting depth, but with the increase of cutting speed, the variation trend of coal debris is not obvious, and the coal and rock are affected by a 30 擄planer. With the increase of cutting speed and cutting depth, the load of planer with 30 擄angle increases linearly.
【作者單位】： 遼寧工程技術(shù)大學(xué)機械工程學(xué)院;遼寧工程技術(shù)大學(xué)先進制造技術(shù)研究院;
【基金】：國家自然科學(xué)基金資助項目(51304105) “十二五”國家科技支撐計劃資助項目(2012BAF12B08) 遼寧省科技計劃資助項目(20131043)
【分類號】：TD421

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