Wanli No. 1 Mine of Guoneng Baotou Energy Co. , Ltd.
College of Mining Engineering, Taiyuan University of Technology
CCTEG Chongqing Research Institute

为了研究负煤柱工作面布置方式下的地表沉陷规律与机理,通过现场实测和数值模拟的方法,研究了负煤柱工作面时空关系对倾向主断面地表沉陷的影响。研究结果表明:负煤柱工作面地表沉陷曲线在三角煤柱侧较直角煤柱侧更为平缓,上覆岩层下沉量增加,垮落带相连,导致地表出现平底区;开采时间间隔越久,地表变形越不均匀,岩层整体所受接续工作面扰动程度越小,变形向首采工作面上方集中,最大下沉值出现点向首采工作面方向偏移,最大下沉量先减小后趋向稳定;基于概率积分法,提出了相应的地表沉陷预测方法,并通过与实测数据对比验证了该预测方法的实用性和可靠性。

To study the surface subsidence law and patterns in negative coal pillar face layout, we take on-site measurement and numerical simulation to study the influence of spatiotemporal relationship of negative coal pillar working faces on the subsidence of the inclined main section. The results show that the subsidence curve of the negative coal pillar working face is smoother on the triangular coal pillar side than that on the rectangular coal pillar side, with an increase in subsidence of the overlying strata and connection of the collapse zones, resulting in a flat-bottomed subsidence area on the surface. As the mining interval increases, the surface deformation becomes more uneven, and the disturbance of the continuous working face on the overall strata decreases, deformation concentrating above the initial mining face. The maximum subsidence point shifts towards the direction of the initial mining face, and the maximum point first reduces and then becomes stable. Based on the probability integral method, we propose surface subsidence prediction method, which is validated by comparing with field measurements data, demonstrating the practicality and reliability of this method.

刘润,乔凯,祝壮,等.负煤柱工作面开采对倾向主断面地表沉陷的影响与预测研究[J].煤炭工程,2024,56(8):138-145.