摘要
以七五煤矿217工作面为例,依据气固两相流理论,运用FLUENT数值模拟软件,建立综采工作面简化模型,对井下综采工作面风流分布和粉尘浓度逸散规律进行模拟研究,并结合现场实测数据对模拟结果进行分析验证,研究结果表明:综采工作面风流受采煤机与液压支架的阻碍作用,发生扰流,在采煤机与移架完成区下风侧形成高风速区,最高风速可达3.5 m/s以上;粉尘在综采工作面风流的影响下,向产尘点下风侧以及人行道扩散;移架完成区内,在截割与移架尘源的共同作用下,粉尘质量浓度不断升高,在移架产尘点下风侧12m附近达到最大,为1400mg/m^3,可作为工作面粉尘防治的重点区域。
Taking the 217 working face of Qiwu Coal Mine as an example,based on the theory of gas-solid two-phase flow,a simplified model of fully-mechanized mining face was established by FLUENT numerical simulation software.Then,the air flow distribution and dust concentration dispersion law in this working face were simulated and studied.And the simulation results were analyzed and validated based on the field measured data.The results showed that the air flow in fully-mechanized mining face was blocked by shearer and hydraulic support,and disturbed flow was produced.Then,a high wind speed zone was formed in the downwind side of shearer and movable frame completion area,with the maximum wind speed of more than 3.5 m/s.Dust diffused to the downwind side of dust production point and sidewalk under the influence of air flow in fullymechanized mining face.In the movable frame completion area,the dust mass concentration increased continuously under the combined action of cutting and removing dust sources,reaching to the maximum of 1400 mg/m^3 near 12 mof the downwind side in the dust production point.Therefore,the movable frame completion area can be taken as the key area for dust control in working face.
作者
宋淑郑
屈亚龙
荆斌
SONG Shuzheng;QU Yalong;JING Bin(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第11期79-83,共5页
Mining Research and Development
基金
国家重点研发计划课题（2017YFC0805202）
国家自然科学基金面上项目（51774198）
山东省自然科学基金省属高校优秀青年基金项目（ZR2017JL026）
关键词
综采面
数值模拟
风流分布
粉尘逸散
呼吸带
Fully-mechanized mining face
Numerical simulation
Airflow distribution
Dust dispersion
Breathing zone
