孟津煤矿顺层抽采钻孔合理封孔深度
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摘要
瓦斯抽采钻孔作为瓦斯抽采的源头,其合理封孔深度直接影响着瓦斯抽采的效果.为了确定适宜孟津煤矿顺层抽采钻孔的合理封孔深度,采用钻屑解吸指标法、钻屑量法测定了卸压区的范围.在卸压区范围的基础上,使用瓦斯运移规律测试装备考察分析了顺层抽采钻孔在不同封孔深度下的轴向瓦斯运移规律,并确定了瓦斯运移负压影响区.最后,根据瓦斯运移负压影响区,确定了孟津煤矿顺层抽采钻孔的合理封孔深度并提出了"抽采钻孔合理封孔深度应超出瓦斯运移负压影响区"的理论.通过在孟津煤矿的现场应用,表明使用该方法确定的合理封孔深度科学、可靠,有效地提高了预抽瓦斯体积分数,进而提高了瓦斯抽采效率;同时,可为其它矿井合理封孔深度的确定提供了分析参考.
As the source of the gas drainage,the reasonable hole-sealing-depth of gas drainage directly affects the effect of gas drainage. In order to determine the reasonable hole-sealing-depth of a Mengjin mine,the methods of gas desorption index and the quantity of drilling cutting are used to test the boundary of a distressed zone. On the base of the test,the axial delivery law of methane in different hole-sealing-depths down the seam with dedicated equipment is analyzed. At last,the reasonable hole-sealing-depth on the base of the delivery law of a methane is determined,and at the same time,the theory that the reasonable hole-sealing-depth shall be exceed the gas migration negative-pressure-affected zone is put forward. Through the application in a Mengjin mine,it shows that the reasonable hole-sealing-depth determined in this method is scientific and reliable. The application can improve the drainage gas concentration effectively,and then improve the gas drainage efficiency. This study can provide a reference for other mines.
As the source of the gas drainage,the reasonable hole-sealing-depth of gas drainage directly affects the effect of gas drainage. In order to determine the reasonable hole-sealing-depth of a Mengjin mine,the methods of gas desorption index and the quantity of drilling cutting are used to test the boundary of a distressed zone. On the base of the test,the axial delivery law of methane in different hole-sealing-depths down the seam with dedicated equipment is analyzed. At last,the reasonable hole-sealing-depth on the base of the delivery law of a methane is determined,and at the same time,the theory that the reasonable hole-sealing-depth shall be exceed the gas migration negative-pressure-affected zone is put forward. Through the application in a Mengjin mine,it shows that the reasonable hole-sealing-depth determined in this method is scientific and reliable. The application can improve the drainage gas concentration effectively,and then improve the gas drainage efficiency. This study can provide a reference for other mines.
引文
[1]国家安全生产监督管理总局.AQ1027—2006煤矿瓦斯抽放规范[S].北京:煤炭工业出版社,2007:1-2.
[2]李博章,孙重兴.瓦斯抽放钻孔合理封孔深度的确定[J].江西煤炭科技,2012(2):109-111.
[3]丁守根,李德参.煤层抽放钻孔合理封孔深度的确定[J].淮南职业技术学院学报,2009,9(1):4-5.
[4]河南理工大学.孟津煤矿11011工作面区域预抽效果达标评判报告[R].焦作:河南理工大学,2012:2-19.
[5]王振,梁运培,金洪伟.防突钻孔失稳的力学条件分析[J].采矿与安全工程学报,2008,25(4):444-445.
[6]王兆丰,杨利平,田坤云,等.高瓦斯油气共生易自燃厚煤层巷道松动圈范围的确定[J].煤矿安全,2007(2):1-2.
[7]魏风清.煤与瓦斯突出的物理爆炸模型及预测指标研究[D].焦作:河南理工大学,2010:58-67.
[8]周世宁,林柏泉.煤层瓦斯赋存与流动理论[M].北京:煤炭工业出版社,1997:69-126.
[9]河南理工大学.提高预抽瓦斯浓度及流量关键技术研究[R].焦作:河南理工大学,2013:25-28.
[10]焦作市美格安矿业科技有限公司.煤层瓦斯抽采钻孔密封质量和漏气位置的检测装置和方法:中国,201210338028[P].2013-01-30.
[2]李博章,孙重兴.瓦斯抽放钻孔合理封孔深度的确定[J].江西煤炭科技,2012(2):109-111.
[3]丁守根,李德参.煤层抽放钻孔合理封孔深度的确定[J].淮南职业技术学院学报,2009,9(1):4-5.
[4]河南理工大学.孟津煤矿11011工作面区域预抽效果达标评判报告[R].焦作:河南理工大学,2012:2-19.
[5]王振,梁运培,金洪伟.防突钻孔失稳的力学条件分析[J].采矿与安全工程学报,2008,25(4):444-445.
[6]王兆丰,杨利平,田坤云,等.高瓦斯油气共生易自燃厚煤层巷道松动圈范围的确定[J].煤矿安全,2007(2):1-2.
[7]魏风清.煤与瓦斯突出的物理爆炸模型及预测指标研究[D].焦作:河南理工大学,2010:58-67.
[8]周世宁,林柏泉.煤层瓦斯赋存与流动理论[M].北京:煤炭工业出版社,1997:69-126.
[9]河南理工大学.提高预抽瓦斯浓度及流量关键技术研究[R].焦作:河南理工大学,2013:25-28.
[10]焦作市美格安矿业科技有限公司.煤层瓦斯抽采钻孔密封质量和漏气位置的检测装置和方法:中国,201210338028[P].2013-01-30.