急倾斜厚煤层“单一巷道”放顶煤采煤法研究
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摘要
为了解决急倾斜单一厚煤层开采时通风条件差、回采率低等问题,针对某矿急倾斜厚煤层赋存条件,运用理论分析和现场试验相结合的研究方法,提出了1种"单一巷道式"放顶煤采煤法。即沿着煤层边界布置2条采区上山,掘进1条回采巷道。在开采过程中沿巷道顶板侧维护1条"人字形"回风巷道,随着放顶煤液压支架的向前推移,维护下1段回风巷,以此接续,形成完整的采区生产系统。研究结果表明:该采煤法降低了回采巷道掘进率,改善了工作面通风条件,提高了煤炭产量,回采率高达到87%,工作面的年生产力18万t/a,满足了矿井安全高效的生产需求。
To solve the problems of poor ventilation condition and low mining efficiency in the mining of steeply thick seam,according to the condition of steeply thick seam in a mine, a single roadway sublevel caving mining method which combines theoretical analysis with field test is proposed. Along the coal seam boundary, two mining areas are arranged along the boundary of the coal seam to go up the mountain and one mining roadway is mined. In the process of mining, a "herringbone"air return roadway is maintained along the roof side of the roadway in the mining process. As the hydraulic support of caving coal goes forward, the air return lane of the lower section is maintained, so as to form a complete mining area production system. The results of the study show that the mining method reduces the rate of roadway excavation, improves the ventilation condition of the working face, and improves the coal output and the recovery rate is more than 87%. The production capacity of working face is up to 0.18 Mt/a, which meets the safety and high efficiency production demands of the mine.
To solve the problems of poor ventilation condition and low mining efficiency in the mining of steeply thick seam,according to the condition of steeply thick seam in a mine, a single roadway sublevel caving mining method which combines theoretical analysis with field test is proposed. Along the coal seam boundary, two mining areas are arranged along the boundary of the coal seam to go up the mountain and one mining roadway is mined. In the process of mining, a "herringbone"air return roadway is maintained along the roof side of the roadway in the mining process. As the hydraulic support of caving coal goes forward, the air return lane of the lower section is maintained, so as to form a complete mining area production system. The results of the study show that the mining method reduces the rate of roadway excavation, improves the ventilation condition of the working face, and improves the coal output and the recovery rate is more than 87%. The production capacity of working face is up to 0.18 Mt/a, which meets the safety and high efficiency production demands of the mine.
引文
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[3]来兴平,李云鹏,王宁波,等.基于梁结构的急倾斜煤层综放工作面顶板变形特征[J].采矿与安全工程学报,2015,32(6):871-876.
[4]曹树刚,勾攀峰.采煤学[M].北京:煤炭工业出版社,2011:358-359.
[5]杨虎雄.急倾斜煤层巷道放顶煤开采合理工艺参数研究[D].太原:太原理工大学,2013.
[6]王宁波,张农,崔峰,等.急倾斜特厚煤层综放工作面采场运移与巷道围岩破裂特征[J].煤炭学报,2013,38(8):1312-1318.
[7]王家臣,赵兵文,赵鹏飞,等.急倾斜极软厚煤层走向长壁综放开采技术研究[J].煤炭学报,2017,42(2):286-292.
[8]李俊斌.海南矿区急倾斜煤层开采技术[J].煤矿开采,2010,15(2):25-26.
[9]杨胜利,赵斌,杨毅.急倾斜厚煤层水平分段综放覆岩破坏模式实验研究[J].煤炭工程,2017,49(10):7.
[10]郭忠平,王凯,陈建杰.急倾斜极近距离煤层联合开采采煤方法研究[J].煤炭科学技术,2017,45(1):68-72.
[11]王卫军,侯朝炯.急倾斜煤层放顶煤顶煤破碎与放煤巷道变形机理分析[J].岩土工程学报,2001,23(5):623-626.
[12]霍丙杰,张宏伟,耿养谋.急倾斜煤层巷道放顶煤回采工艺研究[J].矿业研究与开发,2009,29(4):8.
[13]周清龙,刘大鹏,赵阳升,等.急倾斜煤层顶板破坏特征相似模拟[J].煤矿安全,2014,45(1):26-28.
[14]张艳伟,邢望.急倾斜煤层工作面应力分布与破坏特征数值模拟[J].煤矿安全,2013,44(1):28-30.
[15]戴华阳,郭俊廷,易四海,等.特厚急倾斜煤层水平分层开采岩层及地表移动机理[J].煤炭学报,2013,38(7):1109-1115.
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