【作者】 李波；

【导师】 姜耀东；

【作者基本信息】 中国矿业大学（北京） ， 采矿工程， 2012， 博士

【摘要】 随着煤炭资源的逐步开发,埋藏浅、赋存条件好的煤炭资源逐渐减少,随之而来的是埋藏深、赋存条件差的煤层开采带来的一系列问题,近距离煤层开采巷道围岩控制技术问题便是其中之一。上位煤层开采时,开采活动引起的采动应力会持续作用于下部煤层,致使其受到损伤,整体强度降低,围岩易于破裂。因此,研究复杂地质条件下的巷道支护问题对于煤矿高效生产和煤炭资源的可持续开采具有重要的理论和实现意义的。本文结合平朔安家岭11#煤层的实际地质情况,通过理论计算、数值模拟、相似模型实验和现场实测等手段对近距离煤层开采条件下巷道布置和支护体系设计进行了系统研究,获得了采场覆岩运动规律和煤层顶底板应力传递规律以及煤柱周围应力随开采过程的演化和分布规律。研究表明：煤柱下方岩层中的应力集中系数最高达到5,煤柱失效后的围岩扰动范围达到194m,在地质条件一定的情况下,上部煤层的开采方式、顶板管理等方面直接影响下部煤层开采的难易程度,且下部煤层巷道的布置和支护应与其顶板性质、应力状态相契合,并避免煤柱下方的高应力区。更多还原

【Abstract】 With the gradual development of coal, buried in shallow coal resources are gradually reduced, buried deep seam mining will bring a series of problems, near distance coal seam roadway surrounding rock control technology is one of them. The upper coal seam, mining activity induced by mining stress will continue to lower coal seam, causing the damage, the overall strength of surrounding rock, easy rupture. Therefore, to study under complicated geological conditions in coal mine roadway support efficient production and coal resources sustainable exploitation has the important theory and the realization significance. In this paper, an Jialing Pingshuo Coal Seam11#actual geological situation, through theoretical calculation, numerical simulation, model experiment and field measurement means to close distance coal seam mining under the condition of roadway layout and support system design to undertake the system studies, obtained the rock strata movement rule and coal seam roof and floor stress transfer and coal pillar stress around with the mining process of evolution and distribution. Research shows that:the coal pillar beneath the rock stress concentration coefficient reaches5, coal pillar failure of surrounding rock after disturbance range of up to194m, the geological condition is certain, the upper coal seam mining method, roof management directly affect the lower coal seam mining of difficult easy degree, and the lower coal seam roadway layout and support the support shall be its roof properties, stress state the fit, and avoid coal pillar beneath the high stress area.更多还原