平朔井工三矿区段煤柱宽度优化研究
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摘要
区段煤柱的留设宽度是影响回采巷道围岩稳定性的重要因素,平朔井工三矿工作面区段煤柱宽度一直采用经验值20 m,为优化区段煤柱宽度,提高资源采出率,采用现场实测、理论计算和数值模拟方法对平朔井工三矿合理区段煤柱宽度进行了研究。煤柱应力实测表明:井工三矿9104与9105工作面间20 m煤柱宽度有一定的富裕量,根据极限平衡理论计算与数值模拟结果,平朔井工三矿区段煤柱合理宽度应大于12 m。
The width of the sectional coal pillar would be an important factor affected to the surrounding stability of the mining gateway.The width of the sectional coal pillar in coal mining face of Pingshuo No.3 Underground Mine is an experienced value of 20 m.In order to optimize the width of the sectional coal pillar and to improve the resources recovery rate,a site measurement,theoretical calculation and numerical simulation method were applied to study the width of the rational sectional coal pillar in Pingshuo No.3 Underground Mine.The stress measurement of the coal pillars showed that the 20 m width coal pillar between No.9104 coal mining face and No.9105 coal mining face in No.3 Underground Mine could have certain surplus.According to the ultimate balanced theoretical calculation and the numerical simulation results,the rational width of the sectional coal pillar in Pingshuo No.3 Underground Mine should be over 12 m.
The width of the sectional coal pillar would be an important factor affected to the surrounding stability of the mining gateway.The width of the sectional coal pillar in coal mining face of Pingshuo No.3 Underground Mine is an experienced value of 20 m.In order to optimize the width of the sectional coal pillar and to improve the resources recovery rate,a site measurement,theoretical calculation and numerical simulation method were applied to study the width of the rational sectional coal pillar in Pingshuo No.3 Underground Mine.The stress measurement of the coal pillars showed that the 20 m width coal pillar between No.9104 coal mining face and No.9105 coal mining face in No.3 Underground Mine could have certain surplus.According to the ultimate balanced theoretical calculation and the numerical simulation results,the rational width of the sectional coal pillar in Pingshuo No.3 Underground Mine should be over 12 m.
引文
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[6]天地科技股份有限公司开采设计事业部.平朔井工三矿浅埋煤层综放开采矿压显现规律研究和应用[R].北京:天地科技股份有限公司开采设计事业部,2011.
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[9]韩承强,张开智,徐小兵.区段小煤柱破坏规律及合理尺寸研究[J].采矿与安全工程学报,2007,24(3):370-372.
[2]白矛,刘天泉.条带法开采中条带尺寸研究[J].煤炭学报,1983,8(4):19-25.
[3]侯朝炯,马念杰.煤层巷道两帮煤体应力和极限平衡区的探讨[J].煤炭学报,1989,14(4):21-29.
[4]张开智,夏均民,陈志巧.钻孔煤粉量变化规律在区段煤柱合理参数确定中的应用[J].山东科技大学学报:自然科学版,2003,22(2):51-53.
[5]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7):871-874.
[6]天地科技股份有限公司开采设计事业部.平朔井工三矿浅埋煤层综放开采矿压显现规律研究和应用[R].北京:天地科技股份有限公司开采设计事业部,2011.
[7]杨文采,李幼铭.应用地震层析成像[M].北京:地质出版社,1993.
[8]刘增辉,康天合.综放煤巷合理煤柱尺寸的物理模拟研究[J].矿山压力与顶板管理,2005,22(1):24-26.
[9]韩承强,张开智,徐小兵.区段小煤柱破坏规律及合理尺寸研究[J].采矿与安全工程学报,2007,24(3):370-372.
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