履带行走支架在残煤短壁开采设计中的应用

doi:10.11799/ce202207002

摘要/Abstract

摘要： 针对目前国产履带行走支架在旺格维利式短壁采煤法中的作用开展研究，论述了从进口引进直至国产化的历程以及使用效果，分析了在不同短壁采煤法的配置与必要性，介绍了支护阻力计算公式，通过数值模拟研究了行走支架在开采期间同一支巷的不同位置、不同刀间煤柱宽度下的支护阻力、各个单立柱压力分布及变化规律，得出采空区侧和实体煤侧对立柱压力的影响情况，据此得出支护阻力主要影响因素与关系，并在现场实践中对立柱压力进行监测分析，验证了理论分析的正确性。结果表明，行走支架额定工作阻力能够满足使用要求，切顶线后支巷顶板不垮落是短壁安全开采的重要保障，且各个立柱压力同采空区范围、刀间煤柱宽度呈正相关关系，采空区侧要明显大于实体煤侧。

关键词: 履带行走支架, 国产化, 刀间煤柱, 数值模拟, 支护阻力

Abstract: This paper studies the problem that the mobile roof pedrail powered support is being desalinated in Wongawilli short-wall mining, and introduces the process from import to localization of support and its application effect. In addition, this paper analyzes its configuration and necessity in different short wall mining methods, and optimizes the calculation formula of support resistance on the basis of previous achievements. Through numerical simulation, the support resistance of the support in different positions of the same branch entry and different width of cut pillars, and the distribution and variation law of each single mast pressure were studied. Then the influence of goaf side and entity coal side on mast pressure was obtained. The relationship between the support resistance and the main influencing factors is comprehensively analyzed, and the column pressure is monitored and analyzed in the field practice, which verifies the correctness of the theoretical analysis. Finally, the key practical technology of crawler hydraulic support in fractured zone is given. The results show that the roof caving without cutting of the branch roadway behind the hydraulic support is still an important guarantee for the safety of short wall mining. The theoretical calculation formula of support resistance . And the pressure of the four columns has a positive correlation with the size of the goaf and the width of the coal pillar between the knives. The pressure of columns in goaf side is obviously higher than that in entity coal side. The change of side pillar pressure is the key to analyze and predict the change of roof pressure and load in goaf. In addition, the actual working resistance of side column is smaller than that of simulation. The support crusing can be solved by the following ways, such as strengthening roof support, reinforcement support of caving gangue pile, ground anchor support, grouting reinforcement, and at the same time, the support is pulled out by the traction force of the prop pulling hoist.

中图分类号:

TD823.5

马进功. 履带行走支架在残煤短壁开采设计中的应用[J]. 煤炭工程, 2022, 54(7): 7-12.

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