大同煤田石炭二叠系煤层顶板导水裂隙带发育规律研究  

Study on the Development of Water-carrying Fissure Zones in the Roof of the Carboniferous Permian Coal Seam

作　　者：缪小成 MIAO Xiaocheng(Datong Coal Mine Group Co.,Ltd.)

机构地区：[1]大同煤矿集团有限责任公司,山西省大同市037003

出　　处：《现代矿业》2021年第1期48-52,共5页Modern Mining

摘　　要：根据侏罗纪煤层地质特征及其开采方法,通过理论分析,研究侏罗纪煤层开采、采空区形成过程中的围岩破裂特征及其时空演化规律。针对双纪煤层地质及水文地质特征,分析石炭二叠纪煤层开采过程中及开采后,双纪煤层间岩层的变形破坏、垮落和移动规律,计算分析导水裂隙带高度,及其与侏罗纪采空区底板裂隙带的连通机制,研究揭示大同矿区侏罗纪采空区围岩裂隙发育与积水运移规律,及其对石炭二叠纪煤层安全开采的影响,考虑到双系煤层开采复杂的工作面布置以及多煤层开采对覆岩岩性结构的扰动,相似材料模拟法弥补了经验公式法的不足,动态模拟煤层开采过程中上覆基岩变形破坏的范围及塑性分布情况,导水裂隙带高度模拟结果更接近实测值。According to the geological characteristics of Jurassic coal seams and their mining methods,theoretical analysis is used to study the characteristics of the surrounding rock rupture and the temporal and spatial evolution during the formation of Jurassic coal seams.Aiming at the geological and hydrogeological characteristics of the Bi-period coal seam,the deformation,collapse,and movement of the rock stratum between the Bi-period coal seam during and after the mining of the Carboniferous Permian coal seam were calculated and analyzed.The connection mechanism with the floor fracture zone in Jurassic goaf,the research reveals the development of surrounding rock fissures and water migration in the Jurassic goaf in Datong mining area,and its impact on the safe mining of the Carboniferous Permian coal seams.Considering the complex working face layout of double-series coal seam mining and the disturbance of multi-coal seam mining on the lithologic structure of overburden rock,the similar material simulation method makes up for the deficiencies of the empirical formula method,and dynamically simulates the scope of deformation and failure of overlying bedrock during coal seam mining And the plastic distribution,the simulation result of the height of the water-conducting fissure zone is closer to the measured value.

关 键 词：石炭—二叠纪 导水裂隙带高度 多煤层 重复采动 相似材料模拟 

分 类 号：P61[天文地球—矿床学]