定向预裂卸压技术在预切顶沿空留巷中的应用
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摘要
针对坚硬顶板下的沿空留巷顶板预裂卸压问题,以某矿20916工作面为背景,提出采用隔震定向爆破卸压技术,结合定向预裂理论对20916工作面进行深孔定向爆破并确定关键参数,利用断裂力学和爆破基础理论推导出了炮孔深度、单孔装药量的合理范围和炮孔间距的表达式,实现了聚能和隔震,并成功运用在实际生产中。研究为同条件的定向预裂的沿空留巷起到积极的推广借鉴作用。
In 20916 working face of a mine as the background,along the empty left lane on under hard roof in order to prevent the shock wave of blasting aggravate the key strata breakage shock isolation pre-splitting unloading technology is presented in this paper,based on theory of directional pre-splitting,20916 working face of deep hole directional blasting and determine the key parameters,using the theory of fracture mechanics and blasting charge weight per blasthole is deduced the blast hole depth,the reasonable range and the expressions of the hole spacing,shaped and isolation is achieved,and successfully used in actual production. For the following along with conditions of directional pre-splitting play a positive promotion for reference.
In 20916 working face of a mine as the background,along the empty left lane on under hard roof in order to prevent the shock wave of blasting aggravate the key strata breakage shock isolation pre-splitting unloading technology is presented in this paper,based on theory of directional pre-splitting,20916 working face of deep hole directional blasting and determine the key parameters,using the theory of fracture mechanics and blasting charge weight per blasthole is deduced the blast hole depth,the reasonable range and the expressions of the hole spacing,shaped and isolation is achieved,and successfully used in actual production. For the following along with conditions of directional pre-splitting play a positive promotion for reference.
引文
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[10]龚敏,张凤舞,文斌,等.煤巷底板岩石爆破提高瓦斯抽放率的应用于数值模拟[J].煤炭学报,2012,37(6):972-977.Gong Min,Zhang Fengwu,Wen Bin,et al. Numerical simulation and application on blasting to improve gas drainage rate in floor rock of coal roadway[J]. Journal of China Coal Society,2012,37(6):972-977.
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[12]郭德勇,商登莹,吕鹏飞,等.深孔聚能爆破坚硬顶板弱化试验研究[J].煤炭学报,2013,38(7):1149-1153.Guo Deyong,Shang Dengying,LüPengfei,et al. Experimental research of deep-hole cumulative blasting in hard roof weakening[J]. Journal of China Coal Society,2013,38(7):1149-1153.
[13]康红普.深部煤矿应力分布特征及巷道围岩控制技术[J].煤炭科学技术,2013,41(9):12-17.Kong Hongpu. Stress distribution characteristics and strata control technology for roadways in deep coal mines[J]. Coal Science and Technology,2013,41(9):12-17.
[14]谢文强,常志祥,刘亚东,等.煤矿岩巷掘进聚能水压光面爆破新技术研究与应用[J].能源与环保,2018,40(5):198-203.Xie Wenqiang,Chang Zhixiang,Liu Yadong,et al. Optimization of multi wedge cutting and shaped water pressure smooth blasting technology[J]. China Energy and Environmental Protection,2018,40(5):198-203.
[2]朱传云,喻胜春.爆破引起岩体损伤的判别方法研究[J].工程爆破,2001(1):12-16.Zhu Chuanyun,Yu Shengchun. Study on the criterion of rockmass damage caused by blasting[J]. Engineering Blasting,2001(1):12-16.
[3]璩世杰,陈广平,尚峰华,等.台阶爆破垂直中深孔间隔装药技术的理论分析与应用[J].工程爆破,1999(4):57-61.Qu Shijie,Chen Guangping,Shang Fenghua,et al. theoretical analysis and field tests on effect of decked charges in vertical holes of bench blasting[J]. Engineering Blasting,1999(4):57-61.
[4]张志呈.岩石爆破裂纹的起裂、扩展、分岔与止裂爆破[J].爆破,1999,16(4):21-24.Zhang Zhicheng. On the initiating,glowing branching and sloping of crack un rock blasting[J]. Blasting,1999,16(4):21-24.
[5]张志呈,黄有为,韦家修,等.定向卸压隔振爆破作用下的岩石累积损伤研究[J].煤矿爆破,2011(1):70-75.Zhang Zhicheng,Huang Youwei,Wei Jiaxiu,et al. Research of rock cumulative damage under the action of directional pressure-relieved and vibration-insulated blasting[J]. Coal Mine Blasting,2011(1):70-75.
[6]张志呈.定向卸压隔振爆破[M].重庆:重庆出版社,2013.
[7]张仰强.微地震监测技术在回采工作面矿压显现规律中的应用[J].能源与环保,2018,40(4):13-17.Zhang Yangqiang. Application of micro seismic monitoring technology in strata-pressure behavior law for coal mining face[J]. China Energy and Environmental Protection,2018,40(4):13-17.
[8]高魁,刘泽功,刘健,等.深孔爆破在深井坚硬复合顶板沿空留巷强制放顶中的应用[J].岩石力学与工程学报,2013,32(8):1588-1594.Gao Kui,Liu Zegong,Liu Jian,et al. Application of deep borehole blasting to gob-side entry retaining forced roof caving in hard and compound roof deep well[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(8):1588-1594.
[9]刘健,刘泽功.深孔预裂爆破技术在井筒揭煤种的应用研究[J].煤炭科学技术,2012,40(2):19-21,24.Liu,Jian,Liu Zegong. Study on application of deep borehole prefracturing blasting technology to seam opening in mine shaft[J].Coal Science and Technology,2012,40(2):19-21,24.
[10]龚敏,张凤舞,文斌,等.煤巷底板岩石爆破提高瓦斯抽放率的应用于数值模拟[J].煤炭学报,2012,37(6):972-977.Gong Min,Zhang Fengwu,Wen Bin,et al. Numerical simulation and application on blasting to improve gas drainage rate in floor rock of coal roadway[J]. Journal of China Coal Society,2012,37(6):972-977.
[11]余永强,杨小林,梁为民,等.控制爆破致裂提高矿井瓦斯抽放率试验研究[J].煤炭学报,2007,32(4):377-381.Wu Yongqiang,Yang Xiaolin,Liang Weimin,et al. Testing research of improving mine gas drainage under suction by controlling blasting to cause crack[J]. Journal of China Coal Society,2007,32(4):377-381.
[12]郭德勇,商登莹,吕鹏飞,等.深孔聚能爆破坚硬顶板弱化试验研究[J].煤炭学报,2013,38(7):1149-1153.Guo Deyong,Shang Dengying,LüPengfei,et al. Experimental research of deep-hole cumulative blasting in hard roof weakening[J]. Journal of China Coal Society,2013,38(7):1149-1153.
[13]康红普.深部煤矿应力分布特征及巷道围岩控制技术[J].煤炭科学技术,2013,41(9):12-17.Kong Hongpu. Stress distribution characteristics and strata control technology for roadways in deep coal mines[J]. Coal Science and Technology,2013,41(9):12-17.
[14]谢文强,常志祥,刘亚东,等.煤矿岩巷掘进聚能水压光面爆破新技术研究与应用[J].能源与环保,2018,40(5):198-203.Xie Wenqiang,Chang Zhixiang,Liu Yadong,et al. Optimization of multi wedge cutting and shaped water pressure smooth blasting technology[J]. China Energy and Environmental Protection,2018,40(5):198-203.