摘要
特厚煤层开采过程中,综放面沿空掘巷支护技术是当前煤炭采掘技术发展的重要方向之一。以唐家会矿16 m厚煤层大采高综放面沿空掘巷为工程背景,通过对采面支承压力进行理论研究,并结合数值模拟对侧向支承压力分布情况进行分析,确定了采空区侧应力“先增大后减小”分布情况。侧向支承压力峰值区域距离煤壁边缘约23 m,应力值为22.5 MPa,从而对巷道布置位置提供了依据。设计以锚索为基础的支护组合体,保持沿空掘巷围岩稳定。通过数值模拟得出,无支护时应力峰值在肩角和底角分别达到了10.8和10.3 MPa;当采用优化支护方案后,在巷道剪应力测线上,剪应力峰值逐渐降低。采用优化支护方案后肩角和底角剪应力峰值为7.87和7.36 MPa,与未支护巷道相比,肩角剪应力峰值分别降低了27.12%和28.54%。结合最佳掘进巷道位置布置和合理的锚索体系支护方案,形成了一套适合唐家会矿新型煤巷高效支护技术体系,为实现高效支护和快速掘进提供了技术支撑,对类似开采环境下巷道支护提供了理论基础。
In the mining process of extra-thick coal seam,the supporting technology for gob-side entry driving of fully-mechanized caving face is one of the important directions for the current development of coal mining technology.Taking the 16 m thick coal seam of Tangjiahui Mine with the high mining height gob-side entry driving of fully-mechanized caving face as the engineering background,through theoretical research on the abutment pressure of the mining face,and combining with numerical simulation,the distribution of lateral abutment pressure was analyzed,the distribution of lateral stress in the goaf area was determined as"increasing first and then decreasing".The peak area of lateral abutment pressure is about 23 m away from the edge of the coal wall,with a stress value of 22.5 MPa,providing a basis for the layout of the roadway.A supporting combination was designed based on anchor cables to maintain the stability of the surrounding rock in the gob-side entry driving.Through numerical simulation,it was found that the peak stress without supporting reached 10.8 and 10.3 MPa at the shoulder angle and bottom angle,respectively;after adopting the optimized supporting scheme,the peak shear stress gradually decreases on the roadway shear stress measurement line.After adopting the optimized supporting scheme,the peak shear stress values of the shoulder angle and bottom angle were 7.87 and 7.36 MPa,respectively.Compared with the unsupported roadway,the peak shear stress values of the shoulder angle were reduced by 27.12%and 28.54%,respectively.A set of efficient supporting technology system suitable for Tangjiahui Mine′s new coal roadway has been formed by combining the optimal layout of driving roadway positions and a reasonable anchor system supporting scheme,providing technical support for achieving efficient supporting and rapid driving,and providing theoretical basis for roadway supporting in similar mining environments.
作者
孔皖军
高阳
靳翔飞
任兴
张福敏
王文
Kong Wanjun;Gao Yang;Jin Xiangfei;Ren Xing;Zhang Fumin;Wang Wen(Ordos Huaxing Energy Co.,Ltd.,Ordos 017000,China;Henan Polytechnic University,Jiaozuo 454000,China)
出处
《能源与环保》
2025年第5期262-266,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
河南省高校青年创新人才(23HASTIT011)
国家自然科学基金项目(52174109)。
关键词
厚煤层
沿空掘巷
优化支护
数值模拟
thick coal seam
gob-side entry driving
optimized supporting
numerical simulation
