薄基岩工作面上覆风氧化带地面预注浆改性技术工程实践  

Engineering Practice of Ground Pre-grouting Modification Technology of Wind Oxidized Zone Over Thin Bedrock Working Face

作　　者：罗勇 肖殿才 高翔[2] LUO Yong;XIAO Diancai;GAO Xiang(State Key Laboratory of Deep Coal Mining and Environmental Protection,Huainan 232001,China;School of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]深部煤炭开采与环境保护国家重点实验室,安徽淮南232001 [2]安徽理工大学矿业工程学院,安徽淮南232001

出　　处：《煤炭技术》2022年第6期134-139,共6页Coal Technology

摘　　要：针对顾北矿南二采区1512(3)工作面厚松散含水层下薄基岩开采难题,采用相似材料物理模拟、数值计算及理论分析等方法研究了松散含水层载荷传递作用下不同结构覆岩的运动规律,提出并结合现场实施了风氧化带整体注浆改性技术方案,提高了风化岩层的抗拉能力及内聚力,将风氧化带由载荷层变为具有承载作用的高位关键层,通过对工作面回采期间顶板岩层稳定性及矿压显现特点的分析,证明薄基岩工作面上覆风氧化带地面预注浆改性技术很好地保证了工作面的安全生产。Aiming at the difficult problem of mining thin bedrock under thick loose aquifer at 1512(3)working face in south second mining area of Gubei Mine, similar material physical simulation,numerical calculation and theoretical analysis were used to study the different structural cover under the action of loose aquifer load transfer. According to the law of rock movement, the technical scheme of grouting modification of the aeolian oxidation zone as a whole is proposed and implemented, which improves the tensile capacity and cohesion of the weathered rock formation, and transforms the aeolian oxidation zone from a load-bearing layer to a high-level key layer with load-bearing effect. The analysis of the stability of the roof rock strata and the appearance characteristics of the rock pressure during the mining face proves that the pre-grouting modification technology of the overlying wind oxidation zone on the thin bedrock face can ensure the safe production of the face.

关 键 词：薄基岩 地面注浆 厚松散含水层 

分 类 号：TD325[矿业工程—矿井建设] TD745