梁家煤矿似膏体连采连充技术及工程实践  

Paste-like Continuous Mining and Filling Technology and Engineering Practice in Liangjia Coal Mine

作　　者：王晓勇 王艳俊 WANG Xiaoyong;WANG Yanjun(Coal Industry Taiyuan Design and Research Institute Group Co.,Ltd.,Taiyuan 030001,China)

机构地区：[1]煤炭工业太原设计研究院集团有限公司,太原030001

出　　处：《煤炭技术》2023年第3期101-106,共6页Coal Technology

摘　　要：为解决梁家煤矿三下压煤问题,以2112工作面开采为工程背景,提出了短壁连采连充似膏体充填开采方法,优选了一种以炉渣、粉煤灰为主的似膏体充填材料配比,构建了由充填材料地面制备、井上下输送系统及短壁工作面连采连充一体化的绿色循环开采系统,并进行了地表变形控制效果预计及实测。方案应用结果表明:当粉煤灰质量占比65%、炉渣26%、水泥熟料7%、早强剂1%、减水剂1%和水胶比0.5时,粉煤灰-炉渣似膏体充填材料料浆浓度为66.7%,充填体单轴抗压强度可达到9 MPa,满足工程要求;梁家煤矿采用短壁连采连充开采方法,实测地表最大沉陷200 mm,地表控制在Ⅰ级损坏范围内,实现了不迁村建下安全高效开采。该技术在梁家煤矿的成功运用丰富了充填技术体系,可为其他矿井提供工程技术借鉴。In order to solve the problem of coal pressure under three conditions in Liangjia coal mine,taking the mining of 2112 working face as the engineering background, the paste-like filling mining method of short-wall continuous mining and filling was proposed, and a paste-like filling material ratio mainly composed of slag and fly ash was optimized. The green circulation mining system integrated with ground preparation of filling material, underground transportation system and short-wall continuous mining and filling was constructed, and the surface deformation control effect was predicted and measured. The application results show that when the mass ratio of fly ash is 65%, slag 26%, cement clinker 7%, early strength agent 1%, water reducing agent 1% and water-binder ratio 0.5, the slurry concentration of fly ash-slag paste-like filling material is 66.7%, and the uniaxial compressive strength of the filling body can reach 9 MPa, which meets the engineering requirements. Liangjia coal mine adopts the short-wall continuous mining and filling mining method. The measured maximum surface subsidence is 200 mm, and the surface is controlled within the range of grade I damage, which realizes the safe and efficient mining under the construction of non-moving villages. The successful application of this technology in Liangjia coal mine enriches the filling technology system, which can provide engineering technology reference for other mines.

关 键 词：三下采煤 似膏体充填开采 充填材料配比 短壁连采连充技术 

分 类 号：TD823[矿业工程—煤矿开采]