长壁开采全过程采场矿压数值模拟方法

发布时间：2018-04-20 22:14

本文选题：长壁开采 + 矿压　；参考：《煤炭学报》2017年09期

【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。
[Abstract]:In order to solve the problem that the traditional numerical simulation method deviates greatly from the actual situation, based on the analysis of the whole process of longwall mining, based on the plastic theory, damage softening model and double yield model. A numerical simulation method of stope pressure in the whole process of longwall mining is presented. The theoretical basis of this method is to consider the physical processes of coal and rock mass damage softening roof caving goaf filling and bearing pressure. The numerical algorithm is developed by using FLAC3D FISH language and can be realized numerically. The method is used to simulate the mining process of a working face in Tongxin Coal Mine. The results are in good agreement with the actual situation. The monitored vertical displacement curve of overburden can effectively judge the range of three zones and its dividing line. The monitored support pressure data reflect the periodic pressure and the pressure step. The results provide a new idea and means for the numerical simulation of rock pressure behavior in longwall mining.
【作者单位】：重庆大学煤矿灾害动力学与控制国家重点实验室;大同煤矿集团有限责任公司;
【基金】：长江学者和创新团队发展计划资助项目(IRT13043)
【分类号】：TD32;TD823.4

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