急斜特厚煤岩体耦合致裂应用研究

doi:10.13722/j.cnki.jrme.2014.0791

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (793 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract To better achieve fracturing effect in coal and make up for the shortcomings of blasting and water injection，a method of coupled cracking were put forward. The coupled cracking was applied to a steeply dipping and extra-thick coal layer. The caving ability(U) of coal after coupled cracking was forecasted with the method of BP neural network and the differences of U obtained with the different methods were compared. The effect of pressure relief in rock was analyzed with the method of microseismic monitoring. The coupled-cracking technology was found to be an effective to improve the caving ability and to relieve stress concentration for steeply dipping and extra-thick coal layer. The effect of coupled-cracking was evaluated with the analysis process of coupled cracking. The prediction with BP neural network still had a certain degree of reliability for the cross regional of high stage and conventional stage coal mass and the assessment of coupled cracking effect for coal mass was realized. The number of low level microseismic event rose slightly during the water injection and after water injection and blasting，but the energy caused by the decreasing of high level event was more than the energy of new low level event. The released energy after injection water was only 12.5% of the released energy before injection water. The total energy after the ground blasting was reduced by 51% compared with the energy before blasting. Coupled-cracking effect was manifested in the conversion of the small number of microseismic events of high energy into more events of low energy，which reduced the frequency and extent of dynamic disaster and promoted the slow release of high pressure. The coupled-cracking shifted the dynamic disasters to slow static release.

Key words： mining engineering steeply dipping and extra-thick coal-rock coupled cracking micro-seismic monitoring neural network

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0791 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I8/1569

[1] 谢和平，王家臣，陈忠辉，等. 坚硬厚煤层综放开采爆破破碎顶煤技术研究[J]. 煤炭学报，1999，24(4)：350–354.(XIE Heping，WANG Jiachen，CHEN Zhonghui，et al. Study on top-coal blasting technique of full-mechanized caving in the hard thick coal seam[J]. Journal of China Coal Society，1999，24(4)：350–354.(in Chinese)) [2] 索永录. 综放开采大放高坚硬顶煤预先弱化方法研究[J]. 煤炭学报，2001，26(26)：616–620.(SUO Yonglu. Study of pre-weakened method on the hard thick-top-coal in fully mechanized caving[J]. Journal of China Coal Society，2001，26(26)：616–620.(in Chinese)) [3] 张子飞，来兴平. 复杂条件下急斜厚煤层高阶段综放开采超前预爆破[J]. 煤炭学报，2008，33(8)：845–849.(ZHANG Zifei，LAI Xingping. Segment pre-blasting of sublevel caving of steep and thick coal seam under complex conditions[J]. Journal of China Coal Society，2008，33(8)：845–849.(in Chinese)) [4] 赵老生. 改善高韧性顶煤爆破效果的数值模拟[J]. 辽宁工程技术大学学报(自然科学版)，2010，29(1)：17–19.(ZHAO Laosheng. Power ultrasound-induced heating mechanism of gas in coal seam[J]. Journal of Liaoning Technical University(Natural Science)，2010，29(1)：17–19.(in Chinese)) [5] 龚敏，黄毅华，王德胜，等. 松软煤层深孔预裂爆破力学特性的数值分析[J]. 岩石力学与工程学报，2008，27(8)：1 674–1 681. (GONG Min，HUANG Yihua，WANG Desheng，et al.Numerical simulation on mechanical characteristics of deep-hole presplitting blasting in soft coal bed[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(8)：1 674–1 681.(in Chinese)) [6] 周声才，李栋，张凤舞，等. 煤层瓦斯抽采爆破卸压的钻孔布置优化分析及应用[J]. 岩石力学与工程学报，2013，32(4)：807–812. (ZHOU Shengcai，LI Dong，ZHANG Fengwu，et al.Optimization analysis of drilling layout based on blasting releasing pressure and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(4)：807–812.(in Chinese)) [7] 郑炳旭. 经山寺铁矿优化开采综合爆破技术[J]. 岩石力学与工程学报，2012，31(8)：1 530–1 536.(ZHENG Bingxu. Multiple blasting techniques for exploitation optimizion of jinshan temple iron mine[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(8)： 1 530–1 536.(in Chinese)) [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)： 1 588–1 594.(GAO Kui，LIU Zegong，LIU Jian，et al. Application of deep borehole blasting to gob-side energy retaining forced roof caving in hard and compound roof deep well[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(8)：1 588–1 594.(in Chinese)) [9] 于斌，段宏飞. 特厚煤层高强度综放开采水力压裂顶板控制技术研究[J]. 岩石力学与工程学报，2014，33(4)：778–785.(YU Bin，DUAN Hongfei. Study of roof control by hydraulic fraturing in full-mechanized caving mining with high strength in extra-thick coal layer[J]. 2014，33(4)：778–785.(in Chinese)) [10] 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)：1 148–1 155.(FENG Yanjun，KANG Hongpu. Test on hard and stable roof control by means of direction hydraulic fraturing in coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(6)：1 148–1 155.(in Chinese)) [11] 闫少宏，宁宇，康立军，等. 用水力压裂处理坚硬顶板的机制及试验研究[J]. 煤炭学报，2000，25(1)：32–35.(YAN Shaohong，NING Yu，KANG Lijun，et al. The mechanism of hydro breakage to control hard roof and its test study[J]. Journal of China Coal Society，2000，25(1)：32–35.(in Chinese)) [12] 康天合，张建平，白世伟. 综放开采预注水弱化顶煤的理论研究及其工程应用[J]. 岩石力学与工程学报，2004，23(15)：2 615–2 621. (KANG Tianhe，ZHANG Jianping，BAI Shiwei. Theoretical study and application of weakening top coal using water pre-infusion in fully mechznized sublevel caving mining[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(15)：2 615–2 621.(in Chinese)) [13] 张春华，刘泽功，王佰顺，等. 高压注水煤层力学特性演化数值模拟与试验研究[J]. 岩石力学与工程学报，2009，28(增2)：3 371– 3 375.(ZHANG Chunhua，LIU Zegong，WANG Baishun，et al. Numerical simulation and test study on mechanical properties evolution of high-pressure water injection coal seam[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.2)：3 371–3 375.(in Chinese)) [14] 张坤，来兴平，王宁波. 急斜特厚煤层顶煤注水弱化技术试验[J]. 西安科技大学学报，2010，30(2)：154–158.(ZHANG Kun，LAI Xingping，WANG Ningbo. Test analysis for water injection technology of steep thick seam[J]. Journal of Xi’an University of Science and Technology，2010，30(2)：154–158.(in Chinese)) [15] 邓广哲，王世斌，黄炳香. 煤岩水压裂缝扩展行为特性研究[J]. 岩石力学与工程学报，2004，23(20)：3 489–3 493.(DENG Guangzhe，WANG Shibing，HUANG Bingxiang. Reaearch on behavior character of crack development induced by hydraulic fracturing in coal-rockmass[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(20)：3 489–3 493.(in Chinese)) [16] HUANG B X，LIU C Y，FU J h，et al. Hydraulic fracturing after water pressure control blasting for increased fracturing[J]. International Journal of Rock Mechanics & Mining Sciences，2011，48(6)：976–983. [17] 李宗翔，潘一山，题正义. 木城涧矿煤层高压注水的数值模拟分析[J]. 岩石力学与工程学报，2005，24(11)：1 895–1 899.(LI Zongxiang，PAN Yishan，TI Zhengyi，et al. Numerical simulation study on the high-pressure water injection into coal seam in muchengjian coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(11)：1 895–1 899.(in Chinese)) [18] 苏承东，翟新献，魏向志，等. 饱水时间对千秋煤矿2#煤层冲击倾向性指标的影响[J]. 岩石力学与工程学报，2014，33(2)：235–242.(SU Chengdong，ZHAI Xinxian，WEI Xiangzhi，et al. Influence of saturation period on bursting liability indices for coal seam 2# in qianqiu coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(2)：235–242.(in Chinese)) [19] 章梦涛，宋维源，潘一山. 煤层注水预防冲击地压的研究[J]. 中国安全科学学报，2003，13(10)：69–72.(ZHANG Mengtao，SONG Weiyuan，PAN Yishan. Study on Water Pouring into Coal Seam to Prevent Rock-burst[J]. China Safety Science Journal，2003，13(10)：69–72.(in Chinese)) [20] 崔峰. 复杂环境下煤岩体耦合致裂基础与应用研究[博士学位论文][D]. 西安：西安科技大学，2014.(CUI Feng. Study on the coupled-crack base and application for coal-rock under complicated environment[Ph. D. Thesis][D]. Xi?An：Xi?an University of Science and Technology，2014.(in Chinese)) [21] 崔峰，来兴平，曹建涛，等. 煤体耦合致裂后整体–散体的等效转化及其垮放能力评估[J]. 岩石力学与工程学报，2015，34(3)：1–7.(CUI Feng，LAI Xingping，CAO Jiantao，et al. Overall-loose medium equivalent transformation of coal-mass after coupled-crack and assessment of its caving capability[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：1–7.(in Chinese))