采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2014年
5期
721-725,732
,共6页
“三软”大倾角厚煤层%组合液压支架%稳定性
“三軟”大傾角厚煤層%組閤液壓支架%穩定性
“삼연”대경각후매층%조합액압지가%은정성
large inclined and“three-soft”thick seam%hydraulic powered support%stability analysis
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。
針對劉東煤礦72煤層典型“三軟”大傾角厚煤層的開採條件，採用理論分析與現場實測相結閤的方法，研究瞭“三軟”大傾角厚煤層工作麵組閤液壓支架的穩定性及其適應性。結果錶明：組閤液壓支架的穩定性與支柱的初撐力、初撐力不均衡繫數、支柱迎山角等支護質量因素和煤層傾角、頂底闆巖性特徵等地質因素有關；組閤液壓支架的穩定性隨著支柱初撐力的增大而增彊，隨著煤層傾角的增大而降低，適噹增大組閤支架下側立柱的初撐力有利于提高支架的穩定性；控製支柱閤理的迎山角是大傾角煤層條件下提高支架穩定性的重要保證之一。在劉東礦煤層條件下，支柱迎山角宜為6°左右，適應的最大煤層傾角為36.48°。現場應用中通過改善支架液壓繫統的密封性，防止漏液，提高支柱的初撐力，保持支架及支柱的良好位態，保證瞭支護繫統的穩定性。
침대류동매광72매층전형“삼연”대경각후매층적개채조건，채용이론분석여현장실측상결합적방법，연구료“삼연”대경각후매층공작면조합액압지가적은정성급기괄응성。결과표명：조합액압지가적은정성여지주적초탱력、초탱력불균형계수、지주영산각등지호질량인소화매층경각、정저판암성특정등지질인소유관；조합액압지가적은정성수착지주초탱력적증대이증강，수착매층경각적증대이강저，괄당증대조합지가하측립주적초탱력유리우제고지가적은정성；공제지주합리적영산각시대경각매층조건하제고지가은정성적중요보증지일。재류동광매층조건하，지주영산각의위6°좌우，괄응적최대매층경각위36.48°。현장응용중통과개선지가액압계통적밀봉성，방지루액，제고지주적초탱력，보지지가급지주적량호위태，보증료지호계통적은정성。
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°, and the largest adaptation dip angle of the support is 36.48° 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.
