采矿与安全工程学报Issue(6)：856-862,7.
煤层硬夹矸对大采高工作面煤壁稳定性影响机理研究
The research on the coal wall stability mechanism in larger height coal seam with a stratum of gangue
摘要
Abstract
The integrated research methods are adopted to analyze the coal wall stability for the issue of the hard gangue effect in full height mining face by the means of the theoretical analysis, indoor ex-periments and field measurement. The coal wall spalling model and the stable conditions are proposed, and the rib spalling mechanism in stratum of gangue is studied. The results show that:the compressive strength of the coal block in gangue or superimposed coal sample can be increased compared with the pure coal block;the axial deformation of the pure coal block or superimposed coal sample is larger than the coal block in gangue;the overall stability of the coal wall can be effectively improved in the coal seam with a stratum of gangue; the coal height has greater impact on the coal wall stability--the higher of the coal face, the easier for the coal wall instability under the same external load conditions;the coal face stability condition is given considering the differences of the continuous degree between the field coal body and indoor coal sample. The field measurement indicates that the rib spalling is more stable of the No.28202 coal face in context of the actual production in Dong-qu coal mine, and the rib spalling occurs mainly in the upper position of the No.8 coal seam. The coal face production conditions have been improved base on the low degree of rib spalling.关键词
片帮机理/夹矸煤层/大采高/压杆稳定/临界失稳Key words
rib spalling mechanism/coal seam with a stratum of gangue/larger height coal face/col-umn stability/critical instability分类
矿业与冶金引用本文复制引用
杨敬轩,刘长友,吴锋锋,杨宇..煤层硬夹矸对大采高工作面煤壁稳定性影响机理研究[J].采矿与安全工程学报,2013,(6):856-862,7.基金项目
国家自然科学基金项目(51174192)；江苏省研究生培养创新工程项目(CXLX12_0964)；江苏省“333”培养基金资助项目（BRA2010024）；中央高校基本科研业务费专项基金项目(2011QNB03，2012DXS02) （51174192）
