沿空双巷合理煤柱宽度的数值模拟研究  

Numerical Research on Reasonable Width of Coal Pillar in the Double Gob-Side Entries

作　　者：司鑫炎 王文庆 邵文岗 

机构地区：[1]山西兰花集团莒山煤矿有限公司,山西晋城048002

出　　处：《采矿与安全工程学报》2012年第2期215-219,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50490273);国家"十一五"科技支撑计划项目(2008BAB36B07)

摘　　要：为有效维护某矿3405综采面沿空双巷的稳定,需要首先确定其沿空煤柱和巷间煤柱的合理尺寸。根据该综采面工程地质条件,采用FLAC3D分别对煤柱宽度为2,4,6,8,12,20 m条件下沿空双巷的围岩应力、变形及塑性区分布规律进行了模拟研究。结果表明:随沿空煤柱宽度的增加,巷道顶底移近量呈"降、增、降"的发展趋势,两帮移近量呈"增、降"趋势;随巷间煤柱宽度的增加,巷道围岩位移基本呈减小的趋势;煤柱内峰值应力和塑性区范围均随煤柱的增加呈"增、降"趋势。综合技术经济效果等方面分析得知,4 m沿空煤柱和4 m巷间煤柱条件下,煤柱内应力水平较低,煤柱和巷道稳定性较好且经济合理。据此,对3405综放面的沿空双巷进行掘进和合理动态叠加支护,确保了巷道在其服务期内的安全稳定。In order to maintain the stability of double gob-side entries of the 3405 fully-mechanized caving face at a coal mine,the reasonable coal pillar width of the double gob-side entries should be first determined.Based on the geological conditions,the FLAC3D was used to simulate the distribution law of stress,displacement and plastic zone in surrounding rock of the gob-side entries for coal pillar widths of 2,4,6,8,12,20 m.The results show that as the width of gob-side pillar increases the vertical convergence of the entries first decreases,then rises and last decreases again,while the horizontal convergence initially rises and then decreases;when the width of pillar between two entries increases the surrounding rock displacement of the entries decreases on the whole;the peak stress and plastic zone of coal pillars first increase and then decrease with the rise of the pillar widths.After the comprehensive analysis of the simulation results both in technology,economy and effect,we know that the 4m wide coal pillars of both along gob side and between entries are reasonable for the double gob-side entries because the coal pillars are in low stress region and more coal can be mined.According to the findings,the double gob-side entries were excavated and supported with dynamic superposition technology,which successfully solved the supporting problem of the double gob-side entries.

关 键 词：沿空双巷 数值模拟 综放开采 

分 类 号：TD313[矿业工程—矿井建设]