极松软厚煤层超高巷道顶部高泡材料充填体强度确定  

Determination of filling strength of high foam material at the top of ultra-high roadway in extremely soft thick coal seam

作　　者：王旭锋[1] 贾俊飞 杨战标 赵万里[3] 王纪尧 杨培举[1] 杨前[4] WANG Xufeng;JIA Junfei;YANG Zhanbiao;ZHAO Wanli;WANG Jiyao;YANG Peiju;YANG Qian(School of Mines,China University of Mining&Technology,Xuzhou 221116,China;No.11 Mine,Pingdingshan Tian'an Coal Mining Co.,Ltd.,Pingdingshan 467047,China;Coal Mining and Utilization Research Institute,Pingdingshan Tian'an Coal Mining Co.,Ltd.,Pingdingshan 467000,China;Chaochuan Coal Mine,Pingdingshan Tian'an Coal Mining Co.,Ltd.,Pingdingshan 467522,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]平顶山天安煤业股份有限公司十一矿,河南平顶山467047 [3]平顶山天安煤业股份有限公司煤炭开采利用研究院,河南平顶山467000 [4]平顶山天安煤业股份有限公司朝川矿,河南平顶山467522

出　　处：《采矿与岩层控制工程学报》2023年第4期73-83,共11页Journal of Mining and Strata Control Engineering

摘　　要：极松软厚煤层超高巷道采用顶部充填方式控制围岩稳定已取得了显著的技术效果,已有实践表明,顶部充填体强度对支护效果影响重大。为进一步提升该技术的综合经济效益,增加矿井焦煤产出率,提出采用高泡材料进行顶部充填,以减少材料用量和优化支护效果。通过建立超高巷道顶部充填体受力模型,得到了巷道顶部充填体水平及垂直方向的受载强度,确定了顶部充填体所需的强度及变形能;根据不同水灰比、发泡剂含量条件下高泡材料的力学特性,采用数值模拟方法确定了高泡材料的最佳配比,通过工业试验验证了支护效果。研究结果表明,巷道高度为3~6 m时,顶部充填体水平及垂直方向最大受力载荷分别为0.48 MPa和1.37 MPa;巷道高度为6 m时,顶部充填体所需变形能应大于1.17 MPa;将水灰比为3∶1、发泡剂含量为0.03%的充填体充填至巷道顶部,数值模拟及现场的巷道两帮最大位移分别为220 mm和163 mm,满足工作面安全开采要求。研究结果可为类似条件的巷道围岩控制提供借鉴。Significant technologic effects have already been achieved by using top filling way to control the stability of surrounding rock of ultra-high roadway in extremely soft and thick seam,and existing case studies have shown that the strength of filling body has an important effect on the support quality.To further improve the comprehensive economic effect of the technology and enhance the production rate of coking coal in the mine,this paper proposed to use high-foam materials for top filling to reduce the amount of high-water materials and optimize support effect.By establishing the stress model of filling body at the roof of the ultra-high roadway,the horizontal and vertical loading strength of the filling body at the top of the roadway is obtained,the strength and deformation energy required for the top filling body are determined.The mechanical properties of high-foam materials under different water-cement ratios and foaming agent contents were obtained.The optimal ratio of high-foam materials was determined by numerical simulation method,and the supporting effect was verified at site.Research results show that the maximum horizontal and vertical stress load on the top filling body are 0.48 MPa and 1.37 MPa respectively,when the height of the roadway is 3-6 m.When the height of the roadway is 6 m,the required deformation energy of the top filling body should be greater than 1.17 MPa.The numerical simulation and field measurement show that when the filling body with a water-cement ratio of 3∶1 and a foaming agent content of 0.03%is filled to the top of the roadway,the maximum displacement of both sides of the roadway are 220 mm and 163 mm respectively,which meets the safety requirements for mining.The research results can provide reference for roadway surrounding rock control under similar engineering conditions.

关 键 词：极松软厚煤层 超高巷道 高水高泡材料 材料性能 控制效果 

分 类 号：TD353.7[矿业工程—矿井建设]