摘要
以某矿B3103工作面回风顺槽煤柱宽度为研究对象,通过理论分析确定沿空掘巷理论煤柱宽度,建立FLAC3D沿空掘巷数值计算模型,分析侧向支承应力演化规律,在此基础上对比了不同煤柱宽度沿空掘巷应力分布特征,确定了合理煤柱宽度为6 m,提出了合理支护参数。现场工业性试验表明,B3103工作面回风顺槽变形量在预计范围内,验证了煤柱宽度及支护参数的合理性。
Through theoretical analysis,the theoretical coal pillar width of gob side entry driving is determined,the numerical calculation model of roadway driving along goaf with FLAC3D is established to analyze the evolution law of lateral support stress.The reasonable width of coal pillar is determined as 6 m,and the reasonable support parameters are put forward.The field industrial test shows that the deformation of return air gateway in B3103 working face is within the predicted range,which verifies the rationality of coal pillar width and support parameters,and provides reference for surrounding rock control of roadway driving along goaf under similar conditions.
出处
《山西焦煤科技》
2020年第12期20-23,35,共5页
Shanxi Coking Coal Science & Technology
关键词
沿空掘巷
煤柱宽度
支护参数
巷道变形量
Gob-side entry driving
Coal pillar width
Support parameters
Roadway deformation
