煤矿安全2019，Vol.50Issue(2)：61-66,6.DOI:10.13347/j.cnki.mkaq.2019.02.014
开采参数对远程上行卸压开采应力-裂隙的影响
Influence of Mining Parameters on Stress and Fissure in Long Distance Upward Pressure Relief Mining
摘要
Abstract
Based on the mining geological conditions of A3 coal and B4 coal in Pan’er Coal Mine, a numerical simulation model of long-distance upward pressure relief mining of A3 coal was established. By changing the mining parameters of the model, the influence law of mining thickness and face length on stress field and displacement field distribution in long-distance upward pressure relief mining is obtained. The results show that the mining thickness of the lower relief seam is the fundamental factor affecting the movement and failure of the overlying strata and the height of fracture development. With the increase of mining thickness, the development height of caving zone and fracture zone increases, and the pressure relief range enlarges accordingly;the mining face length has a great influence on the pressure relief range of upward pressure relief mining, and to a certain extent, the face length determines whether the coal seam is fully mined or not, and the pressure relief range of the pressure relief bed under the condition of full mining is larger than that under insufficient mining condition.关键词
卸压开采/数值模拟/应力-裂隙演化/开采参数/应力场/位移场Key words
pressure relief mining/numerical simulation/stress crack evolution/mining parameter/stress field/displacement field分类
矿业与冶金引用本文复制引用
肖家平,窦礼同,史长胜..开采参数对远程上行卸压开采应力-裂隙的影响[J].煤矿安全,2019,50(2):61-66,6.基金项目
国家自然科学基金资助项目(NSFC41674133) （NSFC41674133）
中煤科工集团西安研究院有限公司青年基金资助项目(2018XAYQN11) （2018XAYQN11）
