CAJ | 학술논문

为了解决缓倾斜特厚突出煤层石门揭煤问题，提出了通过顶板岩巷卸压进行石门揭煤的新思路。理论分析了石门揭煤的突出机理，指出含高压瓦斯构造煤在高地应力作用下储存的能量是石门揭煤突出的主要动力。模拟了厚煤层顶板岩巷围岩应力分布对揭煤工作面煤体应力变化的影响。结果表明：顶板岩巷主要起到降低原始应力、转承采动应力的作用，削弱揭煤过程中深部煤岩体受采动造成的应力集中影响，减小影响范围。顶板岩巷可转移承载石门揭煤工作面采动集中应力的15%，工作面前方卸压宽度增加2~3 m，卸压锋面前移，配以顶板岩巷穿层瓦斯抽采钻孔可降低地应力及瓦斯压力，降低煤体弹性能量。顶板岩巷距煤层越近，煤层卸压效果越好。
위료해결완경사특후돌출매층석문게매문제，제출료통과정판암항사압진행석문게매적신사로。이론분석료석문게매적돌출궤리，지출함고압와사구조매재고지응력작용하저존적능량시석문게매돌출적주요동력。모의료후매층정판암항위암응력분포대게매공작면매체응력변화적영향。결과표명：정판암항주요기도강저원시응력、전승채동응력적작용，삭약게매과정중심부매암체수채동조성적응력집중영향，감소영향범위。정판암항가전이승재석문게매공작면채동집중응력적15%，공작면전방사압관도증가2~3 m，사압봉면전이，배이정판암항천층와사추채찬공가강저지응력급와사압력，강저매체탄성능량。정판암항거매층월근，매층사압효과월호。
In this paper, to resolve the problem of rock cross-cut coal uncovering in the super thick and gently inclined outburst coal seam, a new idea through the pressure relief of roof rock tunnel was pro-posed for rock cross-cut coal uncovering. Theoretical analysis has identified the energy stored in tecton-ic coals with high pressure gas, which was formed under high ground stress, is the main driving force of outburst in rock cross-cut coal uncovering. Meanwhile, stress distribution of surrounding rock in roof tunnel of thick coal seam was simulated to study the stress variation of coal mass in uncovering coal face. The results show that the roof tunnel can reduce the original stress, transfer the mining-induced stress, weaken the stress concentration effect of deep coal-rock mass affected by mining operation in uncovering coal process, and reduce the influence scope. The roof tunnel can transfer and bear 15%concentrated stress in rock cross-cut coal uncovering, and the pressure relief width in front of the face can be increased by 2~3 m. Thus, duo to the forwarding of pressure relief frontal surface, together with gas drainage by boreholes through coal seam in roof tunnel, the ground stress, gas pressure and elastic energy of coal mass can be reduced significantly. Moreover, the closer the distance between roof tunnel and coal seam is, the better the pressure relief effect is.