无煤柱分阶段沿空留巷煤与瓦斯共采方法与应用  

Method and application of simultaneous pillar-less coal mining and gas extraction by staged gob-side entry retaining

作　　者：郑西贵[1] 张农[1] 袁亮[2] 薛飞[1] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]淮南矿业(集团)有限责任公司,安徽淮南232001

出　　处：《中国矿业大学学报》2012年第3期390-396,共7页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50974118);中央高校基本科研业务费专项资金项目(2011QNB02)

摘　　要：针对深井高瓦斯低透气性煤层群的典型赋存特征,结合淮南矿区千米深井无煤柱煤与瓦斯工程实践,提出了改进Y型通风模式,即分阶段沿空留巷方法,完善了对共采工程的维控预应力锚固技术.工程实践表明:预应力锚固技术可以实现深井强动压开采过程中对沿空留巷和回风巷道围岩稳定的有效维控,至第1阶段结束,留巷顶板下沉量为144mm,两帮移近量为351mm,分阶段沿空留巷对共采巷道的维护时间缩短了4/5.减少了留巷变形速度稳定后累计变形的不利影响.超前工作面布置的瓦斯抽采工程中,单孔抽采瓦斯浓度(体积分数)达到40%,实现了煤与瓦斯共采.Based on the typical feature of high gas coal seam with low permeability in deep mine, combined with 1 000 m depth mine engineering practice on simultaneous pillar-less coal mining and gas extraction in Huainan mining area, the improving Y model ventilation method, namely gob-side entry retaining by stages method was proposed. The prestressed anchor tech- nology for simultaneous coal and gas extraction was perfected. The engineering practice indica- ted that： pre-stressed anchorage technology could ensure stability in the rock surrounding the gob side entry and air return roadway, despite the strong dynamic pressures developed by the mining process. The roof subsidence was 144 mm and the rib displacement was 351 mm in the gob side entry up to the first stage end. The total maintenance time in the roadway was short- ened by 4/5 and deformation was reduced. Gas drainage from one hole was increased by up to 40 percent by suitable engineering during the advance of the mining face. This allowed simulta- neous coal mining and gas extraction in a deep mine.

关 键 词：无煤柱煤与瓦斯共采 分阶段沿空留巷 Y型通风 预应力锚固 

分 类 号：TD823.48[矿业工程—煤矿开采]