采矿与安全工程学报2016，Vol.33Issue(3)：460-466,7.DOI:10.13545/j.cnki.jmse.2016.03.013
卸压开采影响下回采巷道支护强度量化计算方法探讨
Study on quantitative calculation method of mining roadway supporting intensity under depressurized mining
摘要
Abstract
In order to realize the quantitative supporting intensity of mining roadway under depressur-ized mining, characteristics of floor stress distribution were discussed, coefficient of depressurized min-ing was proposed, and the calculation method about supporting intensity of roadway was given in this paper based on theoretical analysis, numerical simulation and field test. The results have shown that the floor zone can be divided into fractured zone (arc), decreased stress zone (parabola), increased stress zone (oval), and original stress zone. Decreased stress zone depth is 60%-70% times the width of coal face, increased stress zone is 3 times the width and 5 times the depth of external stress field length. The range about coefficient of depressurized mining is 0-1.0 and the depth of key influence areas is about 40 m. According to the field monitoring, required supporting strength of gateway decreased for depressur-ized mining. Although the supporting spacing increases from 600 mm to 800 mm, the roof to floor con-vergence decreases 46.5%, and the deformation of two roadsides reduces by 46.7%. It is rational deter-mination to consider the effect of depressurized mining for roadway support.关键词
卸压开采/回采巷道/卸压开采影响系数/支护强度/定量化Key words
depressurized mining/mining roadway/coefficient of depressurized mining/supporting intensity/quantification分类
矿业与冶金引用本文复制引用
于凤海,赵同彬,谭云亮,郭伟耀..卸压开采影响下回采巷道支护强度量化计算方法探讨[J].采矿与安全工程学报,2016,33(3):460-466,7.基金项目
国家自然科学基金项目(51274133，51474137，51474136)；高等学校博士学科点专项科研基金项目(20123718110013)；山东省泰山学者工程专项经费项目；山东省科技发展计划项目(2014GSF120002)；煤矿安全高效开采省部共建教育部重点实验室开放基金项目(JYBSYS2014202) （51274133，51474137，51474136）
