长壁采场巷道全局和局部应力变化分析

Analysis of global and local stress changes in a longwall gateroad.

作者信息

Tulu I B, Esterhuizen G S, Gearhart D, Klemetti T M, Mohamed K M, Su D W H

机构信息

Department of Mining Engineering, West Virginia University, Morgantown 26505, USA.

NIOSH, Pittsburgh Mining Research Division, Pittsburgh 15216, USA.

出版信息

Int J Min Sci Technol. 2018 Jan;28(1):127-135. doi: 10.1016/j.ijmst.2017.11.015.

DOI:10.1016/j.ijmst.2017.11.015

PMID:30733889

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6363127/

Abstract

A numerical-model-based approach was recently developed for estimating the changes in both the horizontal and vertical loading conditions induced by an approaching longwall face. In this approach, a systematic procedure is used to estimate the model's inputs. Shearing along the bedding planes is modeled with ubiquitous joint elements and interface elements. Coal is modeled with a newly developed coal mass model. The response of the gob is calibrated with back analysis of subsidence data and the results of previously published laboratory tests on rock fragments. The model results were verified with the subsidence and stress data recently collected from a longwall mine in the eastern United States.

摘要

最近开发了一种基于数值模型的方法，用于估算接近的长壁工作面引起的水平和垂直加载条件的变化。在这种方法中，使用系统程序来估算模型的输入。沿层面的剪切用普遍存在的节理单元和界面单元进行建模。煤用新开发的煤体模型进行建模。通过对沉降数据的反分析以及先前发表的关于岩石碎片的实验室测试结果，对采空区的响应进行校准。模型结果通过最近从美国东部一个长壁煤矿收集的沉降和应力数据进行了验证。