CAJ | 학술논문

为确定大采高综采支架合理工作阻力，采用理论分析与现场实测相结合的方法，研究了大采高综采采场顶板结构特征与支架合理承载。根据直接顶中厚硬岩层对覆岩垮落具有重要影响的特点，提出了直接顶关键层的概念与判别方法，依据是否存在直接顶关键层对直接顶分类并计算支架工作阻力。结果表明：Ⅰ类无直接顶关键层条件下，基本顶破断形成单层的“砌体梁”结构，其采场支架工作阻力可按6～8倍采高的岩柱重量计算；Ⅱ类有直接顶关键层条件下，顶板形成由直接顶关键层与基本顶破断组成的双层“悬臂梁-砌体梁”结构，其采场支架工作阻力的计算需考虑直接顶关键层厚度、强度与层位的影响，直接顶关键层强度越大、厚度越大、层位越低，采场所需支架工作阻力越大。上述研究成果在典型条件大采高综采支架工作阻力确定中得到成功应用。
위학정대채고종채지가합리공작조력，채용이론분석여현장실측상결합적방법，연구료대채고종채채장정판결구특정여지가합리승재。근거직접정중후경암층대복암과락구유중요영향적특점，제출료직접정관건층적개념여판별방법，의거시부존재직접정관건층대직접정분류병계산지가공작조력。결과표명：Ⅰ류무직접정관건층조건하，기본정파단형성단층적“체체량”결구，기채장지가공작조력가안6～8배채고적암주중량계산；Ⅱ류유직접정관건층조건하，정판형성유직접정관건층여기본정파단조성적쌍층“현비량-체체량”결구，기채장지가공작조력적계산수고필직접정관건층후도、강도여층위적영향，직접정관건층강도월대、후도월대、층위월저，채장소수지가공작조력월대。상술연구성과재전형조건대채고종채지가공작조력학정중득도성공응용。
In this paper, to determine the reasonable working resistance of support during fully mecha-nized mining with large mining height (FMMLMH), the roof structure characteristics of FMMLMH and reasonable support ability were studied by methods of theoretical analysis and in-situ measurement. The concept and discriminate method of key stratum in the immediate roof (KSIR) were put forward, ac-cording to the fact that the existence of hard strata with medium or thick thickness has vital influence on the collapse of overlying strata. Thus, the immediate roof can be classified into two types, typeⅠwithout KSIR and typeⅡwith KSIR, and the support working resistances of two types can be deter-mined respectively as well. The results show that the main roof of TypeⅠwithout KSIR falls with a sin-gle-layer of voussoir-beam structure, and the support working resistance can be calculated by the weight of rock pillar with 6 to 8 times of mining height. Meanwhile, the main roof of TypeⅡwith KSIR falls with a double-layer of voussoir-beam and cantilever beam structure, which is formed with the break of KSIR and the main roof, and the support working resistance can be calculated with the thickness, hard-ness and layer horizon of the KSIR taken into account. With the increase of KSIR’s thickness or its hardness, or the lower horizon of KSIR, the support working resistance will increase. The research re-sults have been successfully used in the determination of support working resistance in representative FMMLMH.