煤层底板岩层采动裂隙扩展及发育规律模拟研究  

Simulation Study on Development Regularity and Development of Mining-induced Fracture in Coal Seam Floor Rock Drift

作　　者：李留洋 

机构地区：[1]河南省煤炭科学研究院有限公司,河南郑州450001

出　　处：《中州煤炭》2015年第7期42-44,48,共4页Zhongzhou Coal

基　　金：国家自然科学基金项目资助(51274135);国家自然科学基金重点项目资助(51034003);山东省优秀中青年科学家奖励基金资助(BS2011SF016)

摘　　要：针对煤炭开采逐渐向深部转移、底板承压水突水事故频发的问题,以断裂力学、损伤力学以及弹塑性力学为基础,采用RFPA建立采动模型,对底板岩层中采动裂隙扩展贯通形成突水通道进行了研究,发现在采动过程中裂隙最早出现在采空区顶底板的中间位置。随着张拉裂隙的不断扩展,底板岩层出现离层裂隙,开切眼附近底板持续产生裂隙并不断扩展,后期工作面煤壁附近裂隙不断扩展,底板裂隙扩展深约16 m。Aiming at the problems of coal mining gradually shifted to the deep part and frequent water inrush accidents of floor confined water, on the basis of fracture mechanics, damage mechanics and elastic-plastic mechanics, mining model was established by using the RFPA, water inrush channels formed by mining-induced fissure developing and connecting in floor rock drift were studied in this paper. It was found that fissures first appeared in the middle position of floor and roof in goaf in the mining process. With the continuous expan- sion of tensile cracks,delamination fissures appear in floor rock drift,fissures near the floor open-off cut continue to produce and expand. In the latter process, fissures near the coal face wall continue to produce and expand ,and the depth of floor fissures is about 16 m.

关 键 词：采动裂隙 损伤变形 破坏深度 发育规律 

分 类 号：TD325[矿业工程—矿井建设]