深孔预裂爆破与水力压裂技术的工业性对比试验
Industrial Contrast Test of Deep Hole Pre-splitting Blasting Technology and Hydraulic Fracturing Technology
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摘要: 为解决坚硬难垮顶板的技术难题,采用深孔预裂爆破与水力压裂技术分别进行工作面初次放顶的工业性对比试验。试验结果表明:深孔预裂爆破技术通过强制放顶的爆落煤岩块基本可以充满支架后的采空区,有效减弱顶板初次来压时的动载冲击作用,避免飓风的形成,但安全性较差,易产生大量有毒有害气体;定向水力压裂技术通过优化施工设计可有效弱化工作面顶板岩层,破坏顶板完整性,使得顶板能够在工作面推进过程中分层分次及时垮落,有效减弱顶板来压对工作面支架的冲击。Abstract: In order to solve the technical problems of hard caving roof, the contrast tests of deep-hole pre-splitting blasting and hydraulic fracturing were adopted for the initial roof caving. The results showed that the forced caving rocks form the deep-hole pre-blasting technology could fill the mined-out area at the back of the hydraulic support, they effectively weakened the impact effect of the dynamic load by the first weighting, and they could avoid the formation of a hurricane, but the safety was poor and they could produce toxic and harmful gases. Because of the optimized design and construction of directional hydraulic fracturing technique, the roof strata were weakened effectively, and the roof integrity was destroyed. The roof strata could timely and hierarchically caved along the advance process of working face, and they could reduce the impact on the hydraulic support.
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Keywords:
- hard caving roof /
- initial roof caving /
- deep-hole blasting /
- hydraulic fracturing /
- contrast test
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[1] 陈炎光,钱鸣高.中国煤矿采场围岩控制[M].徐州:中国矿业大学出版社,1994. [2] 史元伟,宁宇,魏景云.采煤工作面围岩控制原理和技术[M].徐州:中国矿业大学出版社,2003. [3] 王开,康天合,李海涛,等.坚硬顶板控制放顶方式及合理悬顶长度的研究[J].岩石力学与工程学报,2009,28(11):2320-2327. [4] 吴兆华.淮南潘三煤矿坚硬顶板深孔预裂爆破参数研究[D].北京:煤炭科学研究总院,2013. [5] 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. [6] 宋占有.酸刺沟矿首采面深孔预裂爆破强制放顶技术[J].煤矿开采,2010,15(4):103-105. [7] 伍永平,潘洁,解盘石,等.大倾角煤层坚硬顶板预裂弱化的数值分析[J].西安科技大学学报,2010,30(1):7-13. [8] 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(1):20-21. [9] 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(12):1632-1636. [10] 张学亮,徐刚,张会军,等.深孔爆破弱化坚硬顶板影响因素分析及应用[J].中国矿业,2010,19(4):58. [11] 冯彦军,康红普.定向水力压裂控制煤矿坚硬难垮顶板试验[J].岩石力学与工程学报,2012,31(6):1148. [12] 孙守山,宁宇,葛钧. 波兰煤矿坚硬顶板定向水力压裂技术[J]. 煤炭科学技术,1999,27(2):51-52. [13] 邓广哲,王世斌,黄炳香. 煤岩水压裂缝扩展行为特性研[J].岩石力学与工程学报,2004,23(20):3489. [14] 黄炳香,程庆迎,刘长友,等.煤岩体水力致裂理论及其工艺技术框架[J].采矿与安全工程学报,2011,28(2):167-173. [15] 黄炳香.煤岩体水力致裂弱化的理论与应用研究[D].徐州:中国矿业大学,2009. [16] 连志龙,张劲,王秀喜,等.水力压裂扩展特性的数值模拟研究[J].岩土力学,2009,30(1): 169-174. [17] 闫少宏,宁宇,康立军,等.用水力压裂处理坚硬顶板的机制及实验研究[J].煤炭学报,2000,25(1):32. [18] 吴柏仁,张晓,王有发,等.水压致裂地应力测量技术在何家塔煤矿应用[J].陕西煤炭,2014(4):93-94.
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