摘要
基于目前深井开采过程中采用沿空掘巷技术对减少煤炭资源损失和保证矿井的安全高效生产的重要性,研究提出了深井小煤柱护巷机理以及沿空巷道的支护技术.为科学合理地确定煤柱尺寸,保证沿空巷道的稳定,研究了沿空巷道的围岩应力分布规律、小煤柱护巷机理以及高强锚杆支护.从理论上证明了采用小煤柱护巷及高强锚杆支护方式理论上能够有效地保证深井沿空巷道的稳定.通过现场实践,结果表明采用高预紧力、强力锚杆+强力锚索+强力钢带的联合支护方式,可显著提高沿空巷道围岩的稳定性.
According to the importance of using gob-side entry to reduce the loss of coal resources and ensure the safety and effective production in deep mine,the mechanism of narrow pillar to protect roadway and support technology of gob-side entry is proposed and studied.In order to determine the size of coal pillar scientifically and reasonably,we mainly studied the law of stress distribution of the surrounding rock and the mechanism of narrow pillar drift and high strength bolt support and so on,indicating that using the narrow pillar drift and high strength bolt support can effectively guarantee the stability of gob-side entry in deep mine.The results show that it can obviously improve the stability of gob-side entry in deep mine by using combined support way of high pre-stress,strength bolt＋strength cable＋strength steel strip through field pratice.
出处
《采矿与安全工程学报》
EI
北大核心
2009年第4期520-523,共4页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50534080)
关键词
沿空巷道
小煤柱
支承压力分布
支护技术
高强锚杆
gob-side entry
narrow pillar
distribution of abutment pressure
support technology
high-strength bolt
