长壁工作面顶底板稳定性数值模拟  

Numerical Simulation on Roof and Floor Stability in Longwall Faces

作　　者：彭苏萍[1] 孟召平[1] 

机构地区：[1]中国矿业大学资源开发工程系

出　　处：《中国矿业大学学报》1999年第1期41-45,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金;国家"九五"科技攻关项目

摘　　要：通过对淮南潘三井田１２２１工作面１３－１煤层顶底板沉积岩体结构的综合分析，同时考虑了沉积岩体在垂向和侧向上不连续的地质特征，概化为３种地质力学模型，应用弹塑性力学有限元方法进行了工作面周围应力分布计算．结果表明：在采动影响下，煤层顶底板岩体中明显地存在着一种对称的双应力拱，由于介质的不连续性导致采动应力场的挠动，局部产生附加应力，在回采过程中将对煤层顶底板的稳定性产生不利的影响．Based on a comprehensive analysis on the roof and floor sedimentary rockmass structure of longwall face 1221 in Pansan Coal Mine, Huainan Mining Bureau, three geological and mechanical models are built up. The stress distribution around the longwall face is simulated by using the elastoplastic finite element method. The results indicate that there apparently exist two natural arches in the roof and floor strata under the influence of mining. The discontinuity of rock medium leads to the deformation of stress field and the occurrence of additional stress in some areas, which will have an unfavorable effect on the stability of the roof and floor.

关 键 词：长壁工作面 顶底板 稳定性 数值模型计算 煤矿 

分 类 号：TD823.42[矿业工程—煤矿开采] TD327.2[矿业工程—矿山开采]