“三软”大倾角厚煤层工作面组合液压支架稳定性分析  

Combination hydraulic support stability of working face in large inclined and “three-soft” thick seam

作　　者：吴锋锋[1] 刘长友[1] 李建伟[1] 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2014年第5期721-725,732,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51174192);江苏省"333工程"培养资金项目(BRA2010024);中央高校基本科研业务费专项基金项目(2011QNB03)

摘　　要：针对刘东煤矿72煤层典型"三软"大倾角厚煤层的开采条件,采用理论分析与现场实测相结合的方法,研究了"三软"大倾角厚煤层工作面组合液压支架的稳定性及其适应性。结果表明:组合液压支架的稳定性与支柱的初撑力、初撑力不均衡系数、支柱迎山角等支护质量因素和煤层倾角、顶底板岩性特征等地质因素有关;组合液压支架的稳定性随着支柱初撑力的增大而增强,随着煤层倾角的增大而降低,适当增大组合支架下侧立柱的初撑力有利于提高支架的稳定性;控制支柱合理的迎山角是大倾角煤层条件下提高支架稳定性的重要保证之一。在刘东矿煤层条件下,支柱迎山角宜为6°左右,适应的最大煤层倾角为36.48°。现场应用中通过改善支架液压系统的密封性,防止漏液,提高支柱的初撑力,保持支架及支柱的良好位态,保证了支护系统的稳定性。In view of the mining conditions of large inclined and“three-soft”thick seam in No.72 Coal Seam of Liudong Coal Mine, the stability and suitability of combination hydraulic support in the high inclined and“three-soft”thick coal seam were studied by using theoretical analysis and field measure-ment. The results show that the combination support stability is affected by the supporting quality fac-tors including column setting load, uneven coefficient of setting load and prop-setting angle, etc, and the geological factors including dip angle of coal seam, and roof and floor characteristics, etc. The support stability is enhanced with the increase of column setting load, but reduced as the seam inclination in-creases. Thus, appropriate increasing of setting load in the under side column of combination support will help to improve the support stability, while the reasonable prop-setting angle is one of the important guarantees to improve the support stability in the large inclined seam conditions. In the seam conditions of Liudong Coal Mine, prop-setting angle should be around 6＆#176;, and the largest adaptation dip angle of the support is 36.48＆#176; Measures have been carried out to ensure the stability of support system in field applications, such as improving the sealing performance of hydraulic system to prevent leakage, en-hancing column setting load, and maintaining good-bit states of support and columns.

关 键 词：“三软”大倾角厚煤层 组合液压支架 稳定性 

分 类 号：TD353[矿业工程—矿井建设]