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首页> 外文期刊>Advances in civil engineering >New Method to Design Coal Pillar for Lateral Roof Roadway Based on Mining-Induced Stress: A Case Study
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New Method to Design Coal Pillar for Lateral Roof Roadway Based on Mining-Induced Stress: A Case Study

机译：基于开采诱发应力的侧向顶板巷道煤柱设计新方法：一个案例研究

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摘要

The traditional method to design coal pillar for lateral roof roadway was established based on the mining-induced strata movement contour which is considered as a straight line, while ignoring the variations of the internal strata deformation law as well as stress distribution characteristics. In order to make up for this deficiency, in this study, evolution of mining-induced stress in the overlying strata was simulated using physical and numerical simulations, and a method to design coal pillar for lateral roof roadway based on mining-induced stress was proposed. Thee results indicate that the stress of the overlying strata is redistributed during excavation, and the stress distribution can be divided into a stress-relaxation area, a stress-concentration area, and an in situ stress area. The contour line of 1.05 times the in situ stress is used to define the mining-induced stress contour. Stress inside the contour is redistributed while outside the contour the overlying strata are still within the in situ stress area. Mining-induced stress contour presents a concave-upward type from coal seam to the overlying strata that cannot be merged into a straight one due to their different characteristics of movement and deformation. With this in mind, this study proposed a method to design the width of coal pillar for lateral roof roadway according to the mining-induced stress contour. According to mining-induced stress contour, the width of coal pillar for lateral roof roadway of longwall panel 31100 is 160 m, and the maximum deformation of the roadway is 270 mm. The new method can definitely meet engineering demands.
机译：在不考虑内部地层变形规律和应力分布特征的变化的前提下，以采出地层运动轮廓线为直线，建立了传统的侧向顶板煤柱设计方法。为了弥补这一缺陷，本研究利用物理和数值模拟方法模拟了上覆地层中采矿引起的应力的变化，并提出了一种基于采矿引起的应力的侧向顶板煤柱设计方法。 。结果表明，开挖过程中上覆地层应力重新分布，应力分布可分为应力松弛区，应力集中区和原位应力区。使用1.05倍于原位应力的轮廓线来定义采矿引起的应力轮廓。轮廓内的应力会重新分布，而轮廓外的上覆地层仍在原位应力区内。开采引起的应力等值线呈现出从煤层到上覆地层的凹向上型，由于它们的运动和变形特性不同，它们不能合并成笔直的地层。考虑到这一点，本研究提出了一种根据开采引起的应力轮廓设计侧向煤巷宽度的方法。根据开采引起的应力等值线，长壁板31100的横向顶板巷道煤柱宽度为160 m，巷道最大变形为270 mm。新方法绝对可以满足工程需求。

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  • 来源
    《Advances in civil engineering》 |2018年第10期|4545891.1-4545891.13|共13页
  • 作者

    Wang Feng; Chen Shaojie; Xu Jialin; Ren Mengzi;

  • 作者单位

    Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China|Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao 266590, Peoples R China;

    Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China|Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao 266590, Peoples R China;

    China Univ Min & Technol, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China;

    Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China;

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