采矿与安全工程学报Issue(1)：185-190,6.DOI:10.13545/j.cnki.jmse.2016.01.029
弧形顶板垮落对上隅角瓦斯扰动的研究
Research of the disturbance of curved roof caving for gas in upper corner
摘要
Abstract
By the means of force equilibrium analysis of the arc roof, four major factors affecting its balance have been identified. The four key factors have been used in the simplification of irregular tri-angular body model. And the formula for calculating volume change during the roof caving has been derived, which has indicated that if the sum of the volume change during roof caving, volume change of work surface interior and the lower corner during weighting process substracts the air leakage into goaf, the incremental value of emission gas from the upper corner position during the weighting process can be calculated. By analyzing the upper corner CH4 volume fraction monitoring records of four mine working face, the change rule of upper corner gas volume fraction during the weighting process has been concluded, which has shown that the upper corner gas emission is influenced by the upper arc roof. With periodic roof caving, emission of upper corner gas has significantly increased periodically. Ac-cording to the air monitoring data near upper corner of Kangcheng and Yunjialing coal mine, the in-creased air volume of upper corner during the weighting process has been conducted. Based on the comparison between the measured data and theory calculation, the error is less than 5%.关键词
弧形破坏/周期性断裂/回转扰动/上隅角Key words
curved failure/periodic fracture/rotary disturbance/upper corner分类
矿业与冶金引用本文复制引用
付明明,张英华,黄志安,高玉坤,冯彩云,肖善林..弧形顶板垮落对上隅角瓦斯扰动的研究[J].采矿与安全工程学报,2016,(1):185-190,6.基金项目
国家自然科学基金项目(51174109) （51174109）
