摘要
针对成庄矿综放工作面煤柱宽度留设难题,采用理论分析和数值模拟相结合的研究方法,对4220副巷(瓦斯尾巷)在不同煤柱宽度条件下的围岩塑性区分布进行了研究,结合现场实际情况,最终确定了合理的煤柱宽度为10m。最后,对合理的煤柱宽度进行了现场试验,试验结果表明:除巷道掘进初期沿巷道底板掘进的巷道段变形较大外,4220副巷围岩的两帮变形量仅250mm,而顶底板移近量更小,仅100mm,这说明10m煤柱宽度有利于4220副巷的维护,能够满足巷道正常运输的要求。研究结果可为成庄矿其他采区类似条件下的区段煤柱宽度的确定提供参考依据。
Aiming at the coal pillar size design in fully mechanized top coal caving face in Chengzhuang coal mine, a combining method of theoretical analysis and numerical simulation was adopted to study the plastic zone distribution in surrounding rock of 4220 roadway under different coal pillar size. Based on the result and combining with the field conditions, the reasonable coal pillar size was determined as 10m. According to field test, except in roadway excavation, the two-side convergence was controlled within 250mm, and roof-to-floor convergence was controlled within 100mm. The results indicated, the 10m coal pillar was conducive to the maintenance of the 4220 roadway, satisfying the requirement of common roadway transportation.
出处
《煤炭工程》
北大核心
2016年第1期14-16,共3页
Coal Engineering
基金
科技创新基金面上项目(2014MS037)
国家科技支撑计划课题(2012BAB13B02)
国家自然科学基金项目(U1261211)
关键词
沿空留巷
窄煤柱
理论分析
数值模拟
综放开采
gob-side roadway driving
narrow coal pillar
theoretical analysis
numerical simulation
fully mechanized top coal caving
