CAJ | 학술논문

　　在保护层开采及卸压瓦斯抽采技术的实施过程中，由于受煤层倾角、层间距、卸压角和区段煤柱等因素的影响，存在被保护层上的保护范围小于保护层工作面的开采范围、被保护层沿倾向无法连续开采和远距离倾斜煤层群条件同水平的保护层无法完全保护到同水平的被保护层等技术难题。通过研究，采用下列方法可解决上述技术难题：①在走向上对扩界区采用密集钻孔瓦斯抽采的方式，可将走向卸压角由56°~60°提高到90°；②在倾向上采用2个保护层工作面保护1个被保护层工作面；③对于远距离的倾斜下保护层开采，通过下延保护层开采深度，便可实现同水平被保护层的完全保护。在淮南、淮北矿区的应用表明，上述方法可解决保护层开采过程中面临的技术难题，进而实现被保护层工作面与保护层工作面的等长、等宽布置及被保护层在倾向上的连续开采。
　　재보호층개채급사압와사추채기술적실시과정중，유우수매층경각、층간거、사압각화구단매주등인소적영향，존재피보호층상적보호범위소우보호층공작면적개채범위、피보호층연경향무법련속개채화원거리경사매층군조건동수평적보호층무법완전보호도동수평적피보호층등기술난제。통과연구，채용하렬방법가해결상술기술난제：①재주향상대확계구채용밀집찬공와사추채적방식，가장주향사압각유56°~60°제고도90°；②재경향상채용2개보호층공작면보호1개피보호층공작면；③대우원거리적경사하보호층개채，통과하연보호층개채심도，편가실현동수평피보호층적완전보호。재회남、회북광구적응용표명，상술방법가해결보호층개채과정중면림적기술난제，진이실현피보호층공작면여보호층공작면적등장、등관포치급피보호층재경향상적련속개채。
The protected area of protected seam is often smaller than the protective seam mining area in the process of mining protective seam and the extraction of pressure-relief gas, because of the differ-ent seam inclination, the distance of seams, the pressure relief angle and the coal block. The protected seam cannot be continuous mined. The protective seam can not completely protect the protected seam at the same level in remote inclined coal seam. In the research, those methods can be used to solve the above-mentioned problems. First, the application of intensive drilling gas extraction in oversizing area along strike can increase the pressure relief angle from 56°~60° to 90°. Second, two protective seams can be used to protect one protected seam. Third, deepening the protective seam can completely protect the same level of protected seam. In Huainan and Huaibei mines, the protected seam work-face can be equilong and aequilate arranged by using above methods.