长壁开采全过程采场矿压数值模拟方法  

Numerical simulation method for stope underground pressure in whole process of longwall mining

作　　者：夏彬伟[1,2] 龚涛[1] 于斌[2] 周雷[1] XIA Binwei;GONG Tao;YU Bin;ZHOU Lei(State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China;Datong Coal Mine Group Co Ltd. ,Datong 037003,China)

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030 [2]大同煤矿集团有限责任公司,山西大同037003

出　　处：《煤炭学报》2017年第9期2235-2244,共10页Journal of China Coal Society

基　　金：长江学者和创新团队发展计划资助项目(IRT13043)

摘　　要：针对传统数值模拟方法对长壁开采矿压显现的模拟结果与实际偏差较大的问题,在对长壁开采全过程进行分析的基础上,基于塑性理论、损伤软化模型和双屈服模型,提出了一种长壁开采全过程采场矿压数值模拟方法。该方法的理论基础考虑了开采过程中煤岩体的损伤软化、顶板垮落、采空区充填及承压等物理过程。利用FLAC3D FISH语言开发了数值算法并得以数值实现。采用该方法对同忻煤矿某工作面的开采过程进行了数值模拟,所得结果与现场实际具有很好的一致性,监测的覆岩垂向位移曲线的形态特征能有效的判断三带范围及其分界线,监测的支架压力数据反映了周期来压和来压步距。研究成果为长壁开采矿压显现规律的数值模拟研究提供了一种新的思路和手段。According to the large deviation of simulation results of longwall mining strata behaviors by the traditional numerical simulation method,based on the analysis of the whole process of longwall mining,the plasticity theory,the damage softening constitutive model and the double yield constitutive model,a numerical simulation method for stope underground pressure in whole process of longwall mining is proposed. The theoretical basis of this method takes into account the physical process of damage softening of coal and rock mass,caving of roof,filling and pressure bearing in gob during mining,and numerical algorithm is developed by using FISH language of FLAC3 D and can be realized numerically.This method is used to simulate the mining process of a certain face in Tongxin coal mine,the results are in good agreement with the field practice. The morphological characteristics of the monitored vertical displacement curve of the overburden can be used to effectively determine the distribution range and the dividing line of the three zones,and the pressure data of the monitored hydraulic support reflects the periodic weighting and the weighting interval.The research results provide a new idea and method for the numerical simulation of longwall mining strata pressure behavior law.

关 键 词：长壁开采 矿压 损伤软化 垮落充填 承压 算法 

分 类 号：TD323[矿业工程—矿井建设]