采矿与安全工程学报2011，Vol.28Issue(4)：524-529,6.
近距离“三软”薄煤层群回采巷道围岩控制
Surrounding Rock Control of Mining Roadway in the Thin Coal Seam Group with Short Distance and “Three Soft”
摘要
Abstract
To investigate the failure mechanism of mining roadway in the strike longwall in the thin coal seam group with short distance and "three-soft", based on the previous field investigation and analysis, shield supporting study and experimental determination of rock mechanics parameters, we analyzed the failure reasons of mining roadways in thin coal seam with short distance and "three-soft" in one mine in Southern Sichuan by using numerical simulation. The results show that the stress variation characteristics of surrounding rock are relatively complicated in the mining process of thin coal seam group with short distance and "three-soft". The mining of upper coal seam can cause multiple disturbances on the lower seam, while the exploitation of lower seam can also produce adverse effects on gob-side entry retaining in the upper one. The mining operation make the mining roadways lie in the stress concentration zone, or the stress decreasing area, further intensify the stress concentration degree of roadway surrounding rock, and make the supports of most of the roadways in the condition of "three-soft" be more difficult. Therefore, by guaranteeing the integrity of support system, the support design should consider the characteristics of surrounding rock control under "constant load".关键词
近距离煤层/薄煤层群/三软煤层/回采巷道/破坏机理Key words
short distance coal seam/ thin coal seam group/ three soft coal seam/ mining roadway/ failure mechanism分类
矿业与冶金引用本文复制引用
曹树刚,邹德均,白燕杰,何平均,伍厚荣..近距离“三软”薄煤层群回采巷道围岩控制[J].采矿与安全工程学报,2011,28(4):524-529,6.基金项目
国家自然科学基金项目(51074197) （51074197）
