深部两软煤层沿空巷道冲击地压成因与防治研究  

Causes for rockburst and control of gob side entry in deep two soft coal seams

作　　者：潘立友[1,2] 陈理强[3] 张若祥[4] 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]山东科技大学采矿工程研究院,山东泰安271019 [3]山东科技大学矿业与安全工程学院,山东青岛266510 [4]山东能源龙口矿业集团有限公司,山东烟台265700

出　　处：《岩土工程学报》2015年第8期1484-1489,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51074101);山东科技大学科研创新团队支持计划项目(2014TDJH103);国家重点基础研究发展计划("973"计划)项目(2011CB201206);山东煤炭安全高效开采技术与装备协同创新中心资助项目

摘　　要：针对两软煤层的地质条件,建立了两软煤层冲击地压发生的力学模型。通过对模型的力学分析与现场实践,得出了深部两软煤层条件下冲击地压发生的主要原因,是受上部力源层和下部稳定层夹持下的软弱冲击层出现应力集中和能量积聚,采动活动诱发积聚的能量向破碎缓和区突然释放,造成煤岩块瞬时喷出,形成冲击地压。从深部两软煤层冲击地压发生的应力条件、能量条件、物质条件和冲击地压诱发因素等方面进行分析研究,制定了转移应力、保持护巷煤柱稳定性、巷帮加固、松动帮部、形成顶板支护体阻挡结构的冲击地压防治措施,并进行了现场实践,实现了工作面安全高效无冲击开采。For the geological conditions of two soft coal seams, mechanical models for rockburst occurring in two soft coal seams. Mechanical analysis and field practice of these models show that the main causes for rockburst in deep two soft coal seams are the stress concentration and energy accumulation in the soft alluvium that is clamped in the upper force source layer and the lower stable layer, and the energy accumulated from mining activities which releases to crushing mitigation areas, causing instantaneous ejection of coal and rock blocks and forming the rock burst. Through the researches on stress, energy, material conditions and inducing factors for burst of deep two soft coal seams, the prevention measures for rockburst of block structure of the roof support structure such as transferring stress, maintaining the stability of chain pillars, strengthening coal side, and loosening working slope are formulated. Field practice is made so as to realize the safe and high-efficiency non-impact mining at working faces.

关 键 词：软煤层 沿空巷道 冲击地压 力学机制 防治原理 

分 类 号：TD713[矿业工程—矿井通风与安全]