连采连充工作面巷道失稳及遗留煤柱宽度研究  

Roadway instability and remaining coal pillar width in continuous mining and filling working face

作　　者：刘守兵 刘刚 林益芃 刘志刚 韩帅 无 LIU Shoubing;LIU Gang;LIN Yipeng;LIU Zhigang;HAN Shuai;无(Shanxian Energy Co.,Ltd.,Feicheng Mining Group,Heze 274333,China;Mining Engineering Research Institute,Shandong University of Science and Technology,Taian 271019,China;Xinglongzhuang Coal Mine,Yankuang Energy Group Co.,Ltd.,Jining 272101 China;Shandong Jingtai Engineering Science and Technology Co.,Ltd.,Zibo 255416,China)

机构地区：[1]肥城矿业集团单县能源有限责任公司,山东菏泽274333 [2]山东科技大学采矿工程研究院,山东泰安271019 [3]兖矿能源集团股份有限公司兴隆庄煤矿,山东济宁272101 [4]山东敬泰工程科技有限公司,山东淄博255416

出　　处：《陕西煤炭》2024年第11期71-75,共5页Shaanxi Coal

摘　　要：为了防止在采掘过程中受遗留煤柱影响发生冲击地压事故,主要对工作面煤柱是否会发生失稳进行安全性分析。采用了传统的极限平衡理论计算护巷煤柱宽度,并且对遗留煤柱影响情况进行安全论证。研究结果表明,当煤层被巷道切割时,将会在工作面和巷道之间形成一定宽度的煤柱,而煤柱将处于超前支承压力峰值区内,造成煤柱上产生应力集中,当超过煤柱强度时,便会发生失稳。以陈蛮庄煤矿4302C工作面为对象进行研究,对工作面煤柱是否发生失稳进行安全性分析时采用传统的极限平衡理论计算护巷煤柱宽度。最后,通过FLAC^(3D)数值模拟方法,分析工作面掘进时应力分布变化规律。由于4302C工作面按计划属于单侧采空,理论计算合理煤柱宽度应大于26.136 m。因此,经对比该煤柱不会发生失稳。In order to prevent the rock burst accident caused by the influence of the remaining coal pillars in the mining process,we analyze the safety of the instability of the coal pillars on the working face.The traditional limit equilibrium theory is used to calculate the width of the coal pillar,and the safety demonstration of the influence of the remaining coal pillar is carried out.The results show that when the coal seam is cut by the roadway,a certain width of coal pillar will be formed between the working face and the roadway,and the coal pillar will be in the peak area of the leading abutment pressure,resulting in stress concentration on the coal pillar.When the strength of the coal pillar is exceeded,instability will occur.Taking the 4302C working face of Chenmanzhuang Coal Mine as the object of study,the traditional limit equilibrium theory is used to calculate the width of the coal pillar of the roadway when the safety analysis of the coal pillar of the working face is carried out.Finally,through the FLAC^(3D)numerical simulation method,the variation law of stress distribution during the excavation of the working face is analyzed.Because the 4302C working face belongs to unilateral goaf as planned,the theoretical calculation results show that the reasonable coal pillar width should be greater than 26.136 m.Therefore,the coal pillar will not be destabilized.

关 键 词：连采连充 单侧采空 超前支承压力 极限平衡理论 护巷煤柱 

分 类 号：TD353[矿业工程—矿井建设]