官地煤矿厚煤层综放面深孔爆破处理顶板技术及应用
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摘要
针对厚煤层综放开采顶板平衡结构向高位转移、重力不能够及时向下传递的问题,为了使厚层顶煤能够在矿压作用下及早碎裂、提高冒放性,官地煤矿29406综放工作面采取人工预裂顶板的技术。首先,通过理论计算预评价顶板初次断裂步距;随后采取数值模拟的方法分析了爆破后顶煤碎裂效果,并运用矿压监测数据分析了顶板预裂对支架压力值的改善作用,为保证安全生产提供了参考。
To the difficulty problems of roof balance structure transfer to high level of fully mechanized top coal mining with extra thick coal seam,and then weight could not transfer to low level in time,in order to improving caving property and ensured roof fractured timely under pressure of top coal seam,artificial pre-splitting roof technology was applied in 29406 fully mechanized top coal mining face of Guandi coal mine,first,the first fracture distance of roof was evaluated by theoretical calculation,and then top coal fracturing results was analyzed by number simulation,the improving results of roof pre-splitting to supports pressures were also analyzed by pressure monitoring data,and referenced for safety production.
To the difficulty problems of roof balance structure transfer to high level of fully mechanized top coal mining with extra thick coal seam,and then weight could not transfer to low level in time,in order to improving caving property and ensured roof fractured timely under pressure of top coal seam,artificial pre-splitting roof technology was applied in 29406 fully mechanized top coal mining face of Guandi coal mine,first,the first fracture distance of roof was evaluated by theoretical calculation,and then top coal fracturing results was analyzed by number simulation,the improving results of roof pre-splitting to supports pressures were also analyzed by pressure monitoring data,and referenced for safety production.
引文
[1]李春睿.坚硬顶板深孔预裂爆破新技术及其应用[J].煤矿安全,2013,45(6):76-80.
[2]李春睿,康立军,齐庆新,等.深孔爆破数值模拟及其在煤矿顶板弱化中的应用[J].煤炭学报,2009,34(12):1632-1636.
[3]吴兆华,于海湧.官地矿28412工作面初采强制放顶技术实践[J].煤矿开采,2013,18(1):77-79.
[4]徐刚,刘全明.深孔爆破弱化坚硬顶板不耦合系数研究[J].煤矿开采,2009,14(1):20-21.
[5]徐刚.改善综放开采高韧性顶煤冒放性技术研究[D].北京:煤炭科学研究总院,2004.
[6]徐刚,贾昆,于永江.深孔爆破技术在煤矿中的应用[J].辽宁工程技术大学学报,2006,25(S1):28-30.
[7]张学亮,贾光胜,徐刚.深孔爆破弱化坚硬顶板参数优化分析[J].煤矿开采,2010,15(1):26-28.
[8]赵先春,吴甲春.超前预爆破控制坚硬顶板研究试验[J].煤炭科学技术,1993(11):21-23.
[9]李方立,王成,段长寿.超前深孔预爆破处理坚硬顶板的应用[J].矿山压力与顶板管理,2001(3):72-74.
[10]赵岩森.步距式深孔爆破人工放顶[J].煤炭科学技术,1977(3):36-39.
[2]李春睿,康立军,齐庆新,等.深孔爆破数值模拟及其在煤矿顶板弱化中的应用[J].煤炭学报,2009,34(12):1632-1636.
[3]吴兆华,于海湧.官地矿28412工作面初采强制放顶技术实践[J].煤矿开采,2013,18(1):77-79.
[4]徐刚,刘全明.深孔爆破弱化坚硬顶板不耦合系数研究[J].煤矿开采,2009,14(1):20-21.
[5]徐刚.改善综放开采高韧性顶煤冒放性技术研究[D].北京:煤炭科学研究总院,2004.
[6]徐刚,贾昆,于永江.深孔爆破技术在煤矿中的应用[J].辽宁工程技术大学学报,2006,25(S1):28-30.
[7]张学亮,贾光胜,徐刚.深孔爆破弱化坚硬顶板参数优化分析[J].煤矿开采,2010,15(1):26-28.
[8]赵先春,吴甲春.超前预爆破控制坚硬顶板研究试验[J].煤炭科学技术,1993(11):21-23.
[9]李方立,王成,段长寿.超前深孔预爆破处理坚硬顶板的应用[J].矿山压力与顶板管理,2001(3):72-74.
[10]赵岩森.步距式深孔爆破人工放顶[J].煤炭科学技术,1977(3):36-39.