1.School of Mechnical and Electrical Engineering,Zhoukou Normal University,Zhonkou ,China;2.College of Mechanical Engineering,Liaoning Technical University,Fuxin ,China;3.Taiyuan Research Institute Co.,Ltd., China Coal Technology and Engineering Group, Taiyuan , China

为研究复杂煤层赋存条件下螺旋滚筒的装煤性能,根据内蒙古鄂尔多斯某矿煤样性质测试结果,结合DEM(离散元技术)方法,建立薄煤层采煤机螺旋滚筒与煤壁的离散元耦合模型。解决了螺旋滚筒与煤壁的耦合以及离散元仿真中各参数的合理选择等关键问题;通过跟踪和统计装煤过程中颗粒速度、质量,获取螺旋滚筒装煤过程中煤流的运动形态,以及滚筒包络区域内颗粒的速度分布,根据不同区域的颗粒质量统计计算出螺旋滚筒的装煤效率。通过对采煤机工业性试验中一次截割工作面长度的落煤量和刮板输送机运煤量的统计,发现利用DEM模拟得到螺旋滚筒装煤率与试验数据基本一致。此研究结果为螺旋滚筒装煤性能的改善提供了一种新的方法。

In order to study the coal loading performances of the spiral cutting drum under the complicated seam deposition conditions, according to the prosperity test results of the coal sample from a mine in Ordos of Inner Mongolia, in combination with the Discrete Element Technology Method, a discrete element coupling model of the spiral cutting drum applied to the thin seam shearer and the coal wall was established. The coupling between spiral cutting drum and coal wall was solved as well as the rational selection of each parameter in the discrete element simulation and the other key problems. With the tracking and statistics of particle speed and quantity during the coal loading process, movement patterns of coal flow during coal loading process of spiral cutting drum and partical speed distribution within enveloped area of spiral cutting drum were obtained. According to the particle quality statistics of coal from different regions, the coal loading efficiency of spiral cutting drum was calculated. With the statistics on the fell coal quantity of one pass cutting along the length of coal mining face and the coal conveyed quantity during industrial trial of the coal shearer, the coal loading efficiency of spiral cutting drum obtained from the DEM simulation was the same to test data basically. The study results could provide a new method to improve the coal loading performance of the spiral cutting drum.

国家自然科学基金资助项目(51674134,51574140)；河南省科技攻关资助项目(182102210606)；