摘要
以湖西煤矿31104工作面运输巷掘进期间受相邻工作面动压影响为背景,利用理论分析和数值模拟相结合的方式确定窄煤柱的合理宽度为5 m,并提出以"高强预应力让压锚杆+预应力锚索"为核心强化护巷窄煤柱侧的支护方案。现场监测表明:动压影响下巷道围岩的最大变形量小于300 mm,锚杆的最大受力为165 kN,围岩最大应力均维持在5 MPa左右,没有出现应力集中现象,有效地控制了动压巷道的底鼓和非对称变形,保证了煤矿高产高效地安全生产。
Taking the impact of the dynamic pressure of the adjacent working face during the tunneling of 31104 working face in Huxi Coal Mine as studying background, the reasonable width of narrow pillar is 5 m by means of theoretical analysis and numerical simulation, and we propose the support scheme of strengthening the narrow pillar side of the roadway by taking the＂high-strength pre-stressing yield anchor ＋ pre-stressed anchor cable＂as the core. Site monitoring shows that under the influence of dynamic pressure, the maximum deformation of roadway surrounding rock is less than 300 mm, the maximum force of bolt is 165 kN, and the maximum stress of surrounding rock is about 5 MPa, there is no stress concentration phenomenon, which effectively controls the dynamic pressure roadway under the heaving floor and asymmetric deformation and ensures high production and efficient production of coal mine.
作者
冯廷灿
邹德均
周诗建
FENG Tingcan, ZOU Dejun, ZHOU Shijian(Chongqing Vocational Institute of Engineering, Chongqing 402260, Chin)
出处
《煤矿安全》
CAS
北大核心
2018年第3期87-90,94,共5页
Safety in Coal Mines
关键词
动压巷道
沿空掘巷
窄煤柱
围岩控制
数值模拟
dynamic pressure roadway
gob-side entry driving
narrow Coal pillar
surrounding rock control
numerical simulation
