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在现有煤柱合理结构分区的基础上,将其结构分为塑性区、弹性核区、水压破坏区。为求得各区宽度,首先,应用极限平衡理论和抛物线型强度理论,采用分离变量法确定了塑性区宽度;考虑矿压、水压作用,选用统一强度理论,采用半逆解法,确定了弹性核区宽度;考虑水的浸润软化作用,确定了水压破坏区宽度。之后,通过与以往经典模型各分区计算公式对比,验证了模型的合理性。最后,通过超声波探测技术,测量了煤柱内部的物理形态分布,验证了模型的正确性,并将研究成果应用于董家河煤矿防水隔离煤柱设计中,为煤矿安全高效生产提供了理论依据。
On the basis of the rational structure of existing pillars, the structure is divided into plastic zone, elastic core zone and hydraulic failure zone. In order to obtain the width of each area, firstly, the width of plastic zone was determined by using the method of limit equilibrium and the theory of parabola. Using the unified strength theory and the semi-inverse solution method, the elastic core The width of the zone; Considering the infiltration and softening effect of water, the width of the hydraulic damage zone is determined. Afterwards, the rationality of the model is verified by comparing with the formulas of the divisions of the classic model. Finally, through the ultrasonic detection technology, the physical distribution of the interior of the coal pillar was measured, the correctness of the model was verified, and the research results were applied to the design of the waterproof isolated pillars in Dongjiahe Coal Mine, which provided a theoretical basis for safe and efficient coal production.