丁集煤矿1311(1)综采工作面Y型通风沿空留巷技术

 沿空留巷技术是一项极其复杂的工程技术。丁集煤矿1311(1)工作面回采前，为确保留巷成功，制定了周密的实施方案。但在实际生产中，围压显现严重段，顶底板移近量3000mm左右，锚索失锚现象严重，很多单体支柱压死，局部巷道宽度不到2m，单体无法调整恢复。随着工作面的推进，维护路线越来越长，无法保证2㎡以上断面，也无法进入设备来治理瓦斯和一氧化碳，不能保证工作面安全生产。本设计方案根据现场实际情况，对原方案进行了调整，取得了很好的效果，保证了该工作面生产安全有序的进行。

Gateway Retained Along Goaf Technology with Y Type Ventilation for No.1311 (1) Fully Mechanized Coal Mining Face in Dingji Mine

Gob-side entry retaining is an extremely complex engineering technology. Before mining in working face 1311（1） Mine Ding-ji ,in order to ensure success of entry reaining, a detailed implementation plan was developed. But in site actual situation, confining pressure appear seriously, roof and floor shift is about 3000mm, loss of anchor cable is serious, a lot of single prop crush, local roadway has width less than 2m, and monomer can not adjust the recovery. With advancing of the working face, the maintenance line become more longer, and can not guarantee the section of above 2㎡. The above situation cannot guarantee the minging safety of working faces without possibility of equipement entering to control gas and carbon monoxide. The origin scheme was adjusted according to site actual situation，has acquired a very good effect, which ensured the mining of the working face safely and orderly.