第
45
卷第
2
期
煤
炭
科 学 技 术
Vol. 45 No. 2
2017
年
2
月
Coal Science and Technology
Feb. 2017
刨刀刨削煤岩特性数值模拟研究
郭辰
光
1,2
,
李 源
1
,
胡 迪
1
,
张利
民
1,2
( 1.
辽宁
工程技术大学 机械工程学院
,
辽宁 阜新
123000; 2.
辽宁工程技术大学 先进制造技术研究院
,
辽宁 阜新
123000)
摘 要
:
为了探索薄煤层刨煤机刨刀刨削煤岩的破碎过程及其力学特性
,
基于有限元数值仿真分析方
法分析煤岩截割过程的显示动力特性
。
依据煤岩三向应力测试试验
,
构
建出基于
Drucker Prager
准则
的煤岩本构模型
。
以煤岩刨削截深
、
煤岩刨削速度
、
刨刀前角为水平因素设计单因素仿真分析试验
,
实现煤岩破碎形态与刨刀煤岩截割力的研究
。
研究结果表明
:
煤屑块度与煤岩刨削截深有关
,
随着截
深的增大
,
块度增大
;
随着刨削速度的增加
,
煤屑的块度变化趋势不明显
,
煤岩在 α
=
30°
刨刀作用下
,
截割剥离煤屑块度较大
;
刨刀煤岩截割负载随着截深的增大而增大
;
随着转速与截割深度的增加
,
前
角为
30°
的刨刀负载呈线性上升趋势
。
关键词
:
刨削煤岩
;
刨煤机
;
破碎形态
;
截割力
中图分类号
: TD421; TH122
文献标志码
: A
文章编号
: 0253
-
2336( 2017) 02
-
0141
-
05
Numerical simulation study on coal and rock ploughing and
planing features of plough cutters
Guo Chenguang
1,2
,Li Yuan
1
,Hu Di
1
,Zhang Limin
1,2
( 1. School of Mechanical Engineering,Liaoning Technology University,Fuxin 123000,China;
2. Research Institute of Advanced Manufacturing Technology,Liaoning Technology University,Fuxin 123000,China)
Abstract: In order to discover the breaking process and the dynamics features of the coal and rock ploughing and planing by the plough
cutters of the thin seam plough,based on the finite element numerical simulation analysis method,an analysis was conducted on the ex-
plicit dynamic during the coal and rock cutting process. According to the 3D stress measurement and test of the coal and rock,a coal and
rock constitutive model was established based on the Drucker Prager criterion. An analysis and test of single factor simulation was designed
with the coal and rock ploughing and planing depth,the coal and rock ploughing and planing speed and the front angle of the plough cutter
as the horizontal factor and a study was realized on the coal and rock breaking mode and the coal and rock cutting force of the plough cut-
ter. The study results showed that the coal cutting lump size was related to the coal and rock ploughing and planing depth and with the
depth increased,the lump size would be increased. With the ploughing and planing speed increased,the variation tendency of the coal
lump size was not obvious. Under the
α
=
30° plough cutter role of the coal and rock,the coal cutting and planing lump size was large. The
coal and rock cutting load of the plough cutter would be increased with the depth increased. With the rotary speed and cutting depth in-
creased,the load of the plough with the front angle of 30° was in a linear rising tendency.
Key words: coal and rock ploughing and planing; plough; breaking mode; cutting force
收稿
日期
: 2016
-
07
-
09;
责任编辑
:
赵 瑞
DOI: 10.13199 /j.cnki.cst. 2017.02.023
基金项目
:
国家自然科学基金资助项目
( 51304105) ; “
十二五
”
国家科技支撑计划资助项目
( 2012BAF12B08) ;
辽宁省科技计划资助项目
( 20131043)
作者简介
:
郭辰光
( 1982—) ,
男
,
辽宁朝阳人
,
讲师
,
博士
。Tel: 0418
-
3350200,E
-
mail: gchg_neu@ 163. com
引用格式
:
郭辰光
,
李 源
,
胡 迪
,
等
.
刨刀刨削煤岩特性数值模拟研究
[J].
煤炭科学技术
,2017,45( 2) : 141
-
145
.
Guo Chenguang,Li Yuan,Hu Di,et al.Numerical simulation study on coal and rock ploughing and planing features of plough cutters[J].Coal Sci-
ence and Technology,2017,45( 2) : 141
-
145.
0
引 言
我国煤炭资源储量从赋存条件看
,
薄
煤层和极
薄煤层可采储量为
61. 5
亿
t ,
约占全国煤炭总可采
储量的
20%
[1]
。
然而
,
由于我国薄煤层开采条件
复
杂
,
机械化程度不高等原因
,
普遍存在着弃薄采厚的
现象
,
其产量仅占煤炭总产量的
10%
[2]
。
薄煤
层开
采滞后的现象
,
造成我国煤炭资源采储比例失调
,
浪
141