CAJ | 학술논문

煤层回采过程中，覆岩破坏特征以及裂隙演化规律对于矿井水、瓦斯防治具有重要意义。采用相似模拟试验对某煤矿复合顶板大采高综放工作面覆岩破坏及裂隙演化规律进行研究。研究结果表明：复合顶板大采高综放开采垮落带高度为32.6 m，裂隙带高度为64.6 m；煤层回采过程中对顶板覆岩支承压力的影响，近煤层大，远煤层小；覆岩采动裂隙倾角以中角度，宽度以中宽度为主，且裂隙数量随着远离煤层而逐渐减少；采动过程中，近距离煤层覆岩为采动裂隙聚集区，覆岩裂隙密度曲线呈现为“波浪”型。
매층회채과정중，복암파배특정이급렬극연화규률대우광정수、와사방치구유중요의의。채용상사모의시험대모매광복합정판대채고종방공작면복암파배급렬극연화규률진행연구。연구결과표명：복합정판대채고종방개채과락대고도위32.6 m，렬극대고도위64.6 m；매층회채과정중대정판복암지승압력적영향，근매층대，원매층소；복암채동렬극경각이중각도，관도이중관도위주，차렬극수량수착원리매층이축점감소；채동과정중，근거리매층복암위채동렬극취집구，복암렬극밀도곡선정현위“파랑”형。
In recovery process of coal seam , the overburden failure characteristics and law of cracks evolution are of great significance to water and gas prevention in mine .Based on the similarity simulation test ,the laws of overbur-den failure and cracks evolution under conditions of compound roof and large mining height in full -mechanized top coal caving faces were studied .The results showed that:Caving zone height is 32.6m and fractured zone height is 64.6m;The effect of mining on overburden bearing pressure is great in close coal and little in far coal seam ;The fracture characteristics are mainly with middle angle and middle width , and the number of fissure gradually decrea-ses with far away from coal seam;The fractures cluster region mainly focuses near the coal wall , and the distribu-tion curves of fractures density in overlying strata presents wave-shapes .