The stability of methane capture boreholes around a long wall coal panel
The stability of methane capture boreholes around a long wall coal panel
复制标题
DOI：
10.1016/j.coal.2006.11.004
复制
发表时间：
2007-07-02
影响因子：
5.6
通讯作者：
Jobling, S.
中科院分区：
文献类型：
--
作者：
Whittles, D. N.;Lowndes, I. S.;Jobling, S.
本文描述了计算模型在英国某煤矿一个正在开采的长壁采煤工作面开采期间对瓦斯抽放钻孔稳定性预测的应用。进行该建模是为了研究顶板地质和巷道支护系统的变化可能对从尾巷穿过正在开采的长壁工作面采空区所钻瓦斯抽放钻孔的变形和闭合产生的影响。本文还概述了一个分析模型的开发，该模型用于估算由于岩石剪切导致的钻孔套管弯曲变形、轴向应变和破裂。该模型与地质力学地层模型结合使用，以预测在工作面后方多远处会发生过度的钻孔变形和闭合。此方法用于评估最佳的巷道支护系统以及钻孔之间的间距，以便在工作面回采过程中遇到的各种地质条件下保持有效的钻孔抽放。在模型预测结果与英国某煤矿测量的地质力学和瓦斯抽放数据之间获得了良好的相关性。(c) 2006 Elsevier B.V. 保留所有权利。
This paper describes the application of computational modelling to the prediction of the stability of methane drainage boreholes during the extraction life of an active long wall coal panel within a United Kingdom coal mine. The modelling was undertaken to investigate the affects that changes in the roof geology and roadway support system may have on the deformation and closure of the gas drainage boreholes drilled from the tailgate across the goaf of an active long wall panel. The paper also outlines the development of an analytical model to estimate the bending deformation, axial strain, and the rupture of borehole casing due to rock shear. This model was used in conjunction with the geomechanical strata models to predict the distance behind the face line at which excessive borehole deformation and closure would occur. This method was used to evaluate the optimum roadway support system and spacing between boreholes to maintain effective borehole drainage subject to the range of geological conditions encountered during the panel retreat. A good correlation was obtained between the model predictions and the geomechanical and gas drainage data measured at a UK Colliery. (c) 2006 Elsevier B.V. All rights reserved.