充填回收房式煤柱采场煤柱稳定性分析  

Stability of pillars in backfilling mining working face to recover room mining standing pillars

作　　者：安百富[1] 张吉雄[1] 李猛[1] 黄鹏[1] 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2016年第2期238-243,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2013CB227905);江苏省“青蓝工程”项目;中国矿业大学重大项目培育工程专项项目(2014ZDPY02)

摘　　要：为了提供充填回收房式煤柱采场围岩稳定性分析的理论依据,采用理论分析和数学推导对充填体-煤柱共同支撑下的围岩力学结构进行了研究,发现煤柱区域弹性地基系数kp、充实率φ、顶板抗弯刚度EI、覆岩载荷q是影响煤柱稳定性的主要控制因素。基于弹性地基梁理论建立了顶板岩梁的挠度方程,提出了煤柱区域及充填体的弹性地基系数计算方法,推导出了充实率对煤柱受力、顶板下沉量、采场应力分布特征的计算方程组,并建立了煤柱稳定性的评价公式。To provide theoretical basis to analyze the stability of the surrounding rocks in working face to recover the room mining standing pillars with backfilling, the rock mechanical structure consisting of backfilling materials and pillars has been researched by means of theoretical analysis and mathematical derivation. The results have shown that elastic foundation coefficient of pillars kp, compression ratio of backfilling materials φ, flexural rigidity of roof EI and load of the roof q are the key factors to control the stability of the pillars. Based on the elastic foundation beam theory, the deflection equation of the roof rock beam has been obtained; the calculation of the elastic foundation coefficient of pillars and backfilling materials developed; equations for calculation of the effect of compression ratio of backfilling materials on the press on pillars, roof subsidence and characteristics of stress distribution have been deduced; and in the end the assessing formula of pillar stability has been developed in the paper.

关 键 词：充填回收 房式煤柱 煤柱稳定性 弹性地基 充实率 

分 类 号：TD323[矿业工程—矿井建设]