含黄铁矿坚硬砂岩顶板垮落碰撞摩擦发火特征研究
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摘要
针对新集二矿121109工作面采空区顶板岩石冒落碰撞产生火花引起采空区局部瓦斯燃烧的情况,通过理论分析、实验室实验、现场监测等综合研究手段,揭示了含黄铁矿坚硬砂岩顶板垮落碰撞摩擦发火特征。总结提出了煤层顶板中黄铁矿、石英含量较高,是造成岩石摩擦升温的重要因素,砂岩顶板在接触压力较大情况下以极低运动速度摩擦即会产生连续火花,相同接触摩擦条件下,含黄铁矿岩芯更易产生连续火花,且其火花强度比纯砂岩岩芯的高。研究成果可为类似条件下其他煤矿的灾害治理提供重要理论支持。
Aiming at the situation of local gas combustion in goaf caused by spark produced by top coal caving collision in121109 working face of Xinji No. 2 Coal Mine, by means of theoretical analysis, laboratory experiments and on-site monitoring,the characteristics of friction ignition in collapse and impact of pyrite-bearing hard sandstone roof are revealed. It is concluded that the high content of pyrite and quartz in coal seam roof is an important factor causing rock friction and temperature rise. The continuous spark will occur when sandstone roof rubs at very low velocity under high contact pressure,under the same contact friction conditions,pyrite-bearing cores are more easier to produce continuous sparks,and their spark strength is higher than that of pure sandstone cores. The research results can provide important theoretical support for disaster management of other coal mines under similar conditions.
Aiming at the situation of local gas combustion in goaf caused by spark produced by top coal caving collision in121109 working face of Xinji No. 2 Coal Mine, by means of theoretical analysis, laboratory experiments and on-site monitoring,the characteristics of friction ignition in collapse and impact of pyrite-bearing hard sandstone roof are revealed. It is concluded that the high content of pyrite and quartz in coal seam roof is an important factor causing rock friction and temperature rise. The continuous spark will occur when sandstone roof rubs at very low velocity under high contact pressure,under the same contact friction conditions,pyrite-bearing cores are more easier to produce continuous sparks,and their spark strength is higher than that of pure sandstone cores. The research results can provide important theoretical support for disaster management of other coal mines under similar conditions.
引文
[1]邹全乐.低透煤割缝弱化松弛机理及流固耦合特性研究[D].徐州:中国矿业大学,2016.
[2]钱鸣高.岩层控制的关键层理论[M].徐州:中国矿业大学出版社,2003.
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[4]许家林,鞠金峰.特大采高综采面关键层结构形态及其对矿压显现的影响[J].岩石力学与工程学报,2011,30(8):1547-1556.
[5]宋振骐,蒋宇静,杨增夫,等.煤矿重大事故预测和控制的动力信息基础的研究[M].北京:煤炭工业出版社,2003.
[6] Ran J Q,Passaris E K S,Mottahed P. Shear sliding failure of the jointed roof in laminated rock mass[J]. Rock Mechanics&Rock Engineering,1994,27(4):235-251.
[7]弓培林,靳钟铭.大采高综采采场顶板控制力学模型研究[J].岩石力学与工程学报,2008,27(1):193-198.
[8]鞠金峰,许家林,王庆雄.大采高采场关键层“悬臂梁”结构运动形式及对矿压的影响[J].煤炭学报,2011,36(12):2115-2120.
[9]屈庆栋,许家林,马文顶,等.岩石撞击摩擦火花引爆瓦斯的实验研究[J].煤炭学报,2006,31(4):466-469.
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[11]沈杰,王进学.抑制煤矿砂岩顶板岩石摩擦火花和升温[J].辽宁工程技术大学学报,2009,28(4):521-524.
[12]余为,缪协兴,茅献彪,等.岩石撞击过程中的升温机理分析[J].岩石力学与工程学报, 2005, 24(9):1535-1538.
[13]张培鹏,蒋金泉,秦广鹏,等.坚硬顶板垮落诱发瓦斯爆燃机理及预防[J].采矿与安全工程学报,2014,31(5):814-818.
[14]李波.煤层群多重保护开采煤岩体应力渗流特征及关键层的影响研究[D].重庆:重庆大学,2019.
[2]钱鸣高.岩层控制的关键层理论[M].徐州:中国矿业大学出版社,2003.
[3]高存宝,钱鸣高,翟明华,等.坚硬顶板来压前的多次断裂现象及其应用[J].采矿与安全工程学报,1993(1):39-44.
[4]许家林,鞠金峰.特大采高综采面关键层结构形态及其对矿压显现的影响[J].岩石力学与工程学报,2011,30(8):1547-1556.
[5]宋振骐,蒋宇静,杨增夫,等.煤矿重大事故预测和控制的动力信息基础的研究[M].北京:煤炭工业出版社,2003.
[6] Ran J Q,Passaris E K S,Mottahed P. Shear sliding failure of the jointed roof in laminated rock mass[J]. Rock Mechanics&Rock Engineering,1994,27(4):235-251.
[7]弓培林,靳钟铭.大采高综采采场顶板控制力学模型研究[J].岩石力学与工程学报,2008,27(1):193-198.
[8]鞠金峰,许家林,王庆雄.大采高采场关键层“悬臂梁”结构运动形式及对矿压的影响[J].煤炭学报,2011,36(12):2115-2120.
[9]屈庆栋,许家林,马文顶,等.岩石撞击摩擦火花引爆瓦斯的实验研究[J].煤炭学报,2006,31(4):466-469.
[10]许家林,张日晨,余北建.综放开采顶板冒落撞击摩擦火花引爆瓦斯研究[J].中国矿业大学学报,2007,36(1):12-16.
[11]沈杰,王进学.抑制煤矿砂岩顶板岩石摩擦火花和升温[J].辽宁工程技术大学学报,2009,28(4):521-524.
[12]余为,缪协兴,茅献彪,等.岩石撞击过程中的升温机理分析[J].岩石力学与工程学报, 2005, 24(9):1535-1538.
[13]张培鹏,蒋金泉,秦广鹏,等.坚硬顶板垮落诱发瓦斯爆燃机理及预防[J].采矿与安全工程学报,2014,31(5):814-818.
[14]李波.煤层群多重保护开采煤岩体应力渗流特征及关键层的影响研究[D].重庆:重庆大学,2019.