CAJ | 학술논문

针对大倾角煤层走向长壁工作面开采矿压显现和围岩破断活动的复杂性。基于对不同类型大倾角煤层走向长壁工作面开采数值计算分析，开展了大倾角煤层走向长壁开采覆岩应力场形成与演化研究。结果表明：大倾角煤层开采围岩内发生应力重新分布，应力传递路线发生偏移形成三维空间应力拱壳，其演化形态可由判别系数确定，随着工作面推进，应力拱壳逐渐向外围岩层扩展，且非对称特性显现程度增加，沿煤层走向应力拱扁平率逐渐增大，沿煤层倾向应力拱扁平率逐渐减小，且应力拱最大高度位置不断向回风巷道一侧偏移。以上研究结果为大倾角煤层安全高效开采提供了理论依据。
침대대경각매층주향장벽공작면개채광압현현화위암파단활동적복잡성。기우대불동류형대경각매층주향장벽공작면개채수치계산분석，개전료대경각매층주향장벽개채복암응력장형성여연화연구。결과표명：대경각매층개채위암내발생응력중신분포，응력전체로선발생편이형성삼유공간응력공각，기연화형태가유판별계수학정，수착공작면추진，응력공각축점향외위암층확전，차비대칭특성현현정도증가，연매층주향응력공편평솔축점증대，연매층경향응력공편평솔축점감소，차응력공최대고도위치불단향회풍항도일측편이。이상연구결과위대경각매층안전고효개채제공료이론의거。
The researches on formation and evolution of stress field of surrounding rocks have been made to improve the mining technology in steeply dipping coal seams. The results of study show that stress redistribution of surrounding rock occurs in steeply dipping seam mining, the routes of stress transformation shift and stress arch shell is formed in three-dimensional space.The evolution morphology of which could be determined by discriminate coefficient.With the face advancing,stress arch shell extends to the periphery rock and its non-symmetrical nature strengthened gradually. The flat ratio of stress arch increases gradually along coal seam when it decreases gradually along coal tendency, and the maximum height position of stress arch continues to shift to the side of return airway.The results above provide a theoretical basis for the safe and efficient mining in steeply dipping seam.