CAJ | 학술논문

　　为深入研究近距离厚煤层组综放开采覆岩破坏规律，并为合理留设露头区安全煤(岩)柱提供数据依据，指导浅部工作面防治溃水、溃砂等水害事故，以大屯矿区7，8煤近距离厚煤层组工作面为例，在前期上层煤(7煤)覆岩破坏规律观测研究的基础上，近期采用井下“两带”观测仪观测了下层煤(8煤)的“两带”高度发育特征，从而在我国率先全面实测了近距离厚煤层组工作面覆岩破坏规律。结果表明：上层煤的底板破坏范围与下层煤垮落带发育范围有重合区域时，下层煤垮落带高度增大；下层煤综放开采按综合采厚计算的裂采比与以往单一煤层的裂采比较为接近，但按下层煤采厚计算的裂采比高于综放开采单一煤层的裂采比52%。“三下采煤规程”中的“两带”高度预计公式在近距离厚煤层组综放开采条件下应当进一步完善。
　　위심입연구근거리후매층조종방개채복암파배규률，병위합리류설로두구안전매(암)주제공수거의거，지도천부공작면방치궤수、궤사등수해사고，이대둔광구7，8매근거리후매층조공작면위례，재전기상층매(7매)복암파배규률관측연구적기출상，근기채용정하“량대”관측의관측료하층매(8매)적“량대”고도발육특정，종이재아국솔선전면실측료근거리후매층조공작면복암파배규률。결과표명：상층매적저판파배범위여하층매과락대발육범위유중합구역시，하층매과락대고도증대；하층매종방개채안종합채후계산적렬채비여이왕단일매층적렬채비교위접근，단안하층매채후계산적렬채비고우종방개채단일매층적렬채비52%。“삼하채매규정”중적“량대”고도예계공식재근거리후매층조종방개채조건하응당진일보완선。
In this paper, to deeply study the overburden failure rules in sub-level caving mining of close distance thick coal seams group, and provide basis for the reasonable setting of safety coal and rock pillars in the outcrop area to control the water disasters (e.g.water inrush, sand inrush) occurred in shallow part coal face, taking one working face in close distance thick coal seams group (No.7 and No.8 Coal Seams) of Datun Mining Group as example, on the basis of early observation of overlying strata failure rules in the upper coal seam (No.7 Coal Seam), the underground “two zones” visualizer was re-cently used to observe the “two zones” height development characteristics of the lower coal seam (No.8 Coal Seam), thus taking the leading and comprehensive measurement of overburden failure laws in the working face of close distance thick coal seams group in China. The results show that when there exits coincidence area between the floor damage range of the upper coal seam and the caving zone develop-ment range of the lower coal seam,the caving zone height of the lower coal seam will in-crease.Meanwhile, the ratio of the fractured zone height to the mining height in sub-level caving mining of close distance thick coal seams group is similar to that in the one single coal seam according to the calculation of comprehensive mining thickness, while the ratio is higher than that in one single seam about 52% according to the calculation of lower coal seam thickness. Therefore, the calculation formula of “two zones” height in “Mine regulations in three special conditions” needs further improvement un-der the conditions of sub-level caving mining in the close distance thick coal seams group.