CAJ | 학술논문

为分析煤层硬夹矸对大采高工作面煤壁稳定性的影响，采用室内试验、理论分析及现场实测相结合的方法，提出了煤壁片帮模型与稳定条件，研究了夹矸煤层工作面煤壁片帮机理。研究表明：夹矸或叠加煤样较纯煤试块抗压强度有所提高；纯煤或叠加煤样轴向变形量较夹矸煤样轴向变形有所增大；煤层硬夹矸能有效提高煤壁整体稳定性；煤体高度对煤壁稳定性影响较大，在相同外力条件下，煤体高度越大，煤壁越易失稳；同时考虑到工作面煤体与室内试验煤样损伤、连续度差异，给出了工作面煤体稳定条件。以东曲煤矿夹矸煤层大采高工作面生产实际为工程背景，实测分析表明，东曲煤矿夹矸煤层28202工作面煤壁片帮较为稳定，工作面片帮主要发生在8#
위분석매층경협안대대채고공작면매벽은정성적영향，채용실내시험、이론분석급현장실측상결합적방법，제출료매벽편방모형여은정조건，연구료협안매층공작면매벽편방궤리。연구표명：협안혹첩가매양교순매시괴항압강도유소제고；순매혹첩가매양축향변형량교협안매양축향변형유소증대；매층경협안능유효제고매벽정체은정성；매체고도대매벽은정성영향교대，재상동외력조건하，매체고도월대，매벽월역실은；동시고필도공작면매체여실내시험매양손상、련속도차이，급출료공작면매체은정조건。이동곡매광협안매층대채고공작면생산실제위공정배경，실측분석표명，동곡매광협안매층28202공작면매벽편방교위은정，공작면편방주요발생재8#
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.