充填开采超前段主动支护替代被动支护技术与应用

Technology and application of active support replacing passive support in advance section of backfill mining

超前主动支护在围岩稳定性控制和生产管理等诸多方面有明显优势。以岱庄煤矿31322充填工作面为研究背景,借助矿压监测手段确定超前段围岩运移和应力演化特征,基于工作面应力场的分布规律,提出“充填面主动支护替代被动支护”理念,采用Fillzone模块模拟不同跨度充填对工作面超前段的影响,确定超前锚杆索主动支护方案在完全充填开采条件下的可行性;通过构建充填面人工支护体与围岩结构的力学模型,校验了回采巷道原支护强度,并针对不同回采巷道超前段进行差异性优化。试验结果表明,超前主动支护技术可节约成本60.6%,可为类似充填开采超前段主动支护优化提供借鉴。

Advance active support has obvious advantages in surrounding rock stability control and production management.With the 31322 filling face of Daizhuang Coal Mine as the research background,the migration and stress evolution characteristics of surrounding rock in the advance section were determined by means of mine pressure monitoring.Based on the distribution law of the stress field of working face,the concept of“replacing the passive support of filling face with active support”was proposed.Fillzone module was used to simulate the influence of filling with different spans on the advance section of working face.The feasibility of advance anchor cable active support scheme under the condition of full filling mining was determined.By constructing the mechanical model of the artificial support body and surrounding rock structure of backfill surface,the original support strength of mining roadway was verified,and the difference optimization was carried out for different advance sections of mining roadway.The experimental results show that the advance active support technology can save 60.6%of the cost compared with the passive support,and can provide reference for the optimization of the advance active support in similar filling mining.