摘要
在阐述采空区边界处顶板活动规律的基础上,从巷旁支护与煤体之间的匹配、超前支护在巷内的均布程度、超前支护与上位岩层对下位岩层之间的“顶-压”作用,以及不同时期不同方向上的反复扰动4个方面,详细论述了锚杆支护条件下超前主动支护沿空留巷顶板破碎的原因,提出了“匹配协调、力求均布、弱化扰动”的预防原则,并应用于鸡西杏花煤矿东四采区23号煤层右三面下巷中,成功地解决了沿空留巷顶板破碎问题.
On the basis of expounded the roof move law cracking reason about gob-side entry retaining of anterior along gob boundary, from four aspects explained roof strengthen support and initiative support, they are the matching of roadside support and coal body, equably dispose anterior strengthen support, anterior support and epigynous rock＇ s “roof and press” act on hypogynous rock, and move during differ time and differ direction times without number, put forward three principles to avoid roof cracking, they are matching and harmony, equably dispose with might and main, bate move, applied the principles to laneway in No. 23 coal bed of Jixi Xinghua Colliery, solved the roof cracking problem of the gob-side entry retaining successfully.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2005年第4期429-432,共4页
Journal of China Coal Society
关键词
沿空留巷
顶板破碎
超前支护
主动支护
gob-side entry retaining
roof cracking
anterior strengthen support
initiative support
