下分层不同层位千米钻孔稳定性研究

石占山; 梁冰; 王岩; 秦冰

doi:10.21656/1000-0887.370234

下分层不同层位千米钻孔稳定性研究

doi: 10.21656/1000-0887.370234

¹辽宁工程技术大学矿业学院, 辽宁阜新 123000;²辽宁工程技术大学力学与工程学院, 辽宁阜新123000;³煤科集团沈阳研究院有限公司, 辽宁抚顺 113122

基金项目: 国家重点研发计划（2016YFC0600704；2016YFC0801404）

详细信息

作者简介:
石占山（1989—），男，博士生（通讯作者. E-mail: shizhanshan@163.com）.

中图分类号: TD726
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出版历程
- 收稿日期: 2016-07-25
- 修回日期: 2017-06-26
- 刊出日期: 2017-09-15

Study of Kilometer Drilling Stability at Different Strata Beneath the Floor

¹School of Mines, Liaoning Technical University, Fuxin, Liaoning 123000, P.R.China;²School of Mechanics & Engineering, Liaoning Technical University,Fuxin, Liaoning 123000, P.R.China;

Funds: The National Key Research and Development Project of China（2016YFC0600704；2016YFC0801404）

摘要

摘要: 抽采钻孔的稳定性影响到抽采工程效果的好坏.采动作用下，位于底板下方不同层位千米钻孔的加卸载路径不同.为得到采动作用对不同层位钻孔稳定性的影响，分析了底板不同层位钻孔加卸载路径，依据该路径，设计十种数值模拟计算方案，对底板钻孔在不同速率加卸载、变速加卸载两种方式下的破坏范围、孔壁位移进行了分析，得到了加卸载结束后各方案对应的塑性区分布范围及加卸载过程中孔壁位移曲线.依据数值计算得到的卸载速率与形变恢复滞后性的关系，建立了考虑卸载速率变化的钻孔周边切应力计算模型.研究结果表明：加载速率对钻孔周边的破坏范围几乎不产生影响；卸载过程中，钻孔周边破坏范围与初始卸载应力及卸载速率相关，在进行底板顺层抽采钻孔布置时需综合考虑布孔位置处的应力值及卸载速率.
- 特厚煤层 /
- 水平分层开采 /
- 千米钻孔稳定性 /
- 采动底板
Abstract: The stability of gas drainage drilling affects the quality of extraction engineering. Under the action of mining, underfloor kilometer drillings distributed at different horizons have different loading and unloading paths. To get the influence of mining on borehole stability, the loading and unloading paths of drillings located at different horizons were analyzed and accordingly the hole destruction area and the wall displacement at different loading and unloading rates and timevarying loading and unloading rates were numerically simulated. Through 10 numerical simulation schemes, the distribution of plastic zones and the loading and unloading displacement curves of the hole wall were obtained. Based on the numerically simulated relationship between the unloading rate and the hole deformation hysteresis, the shear stress calculation model around the borehole was built in view of the unloading rate. The results indicate that, during the loading process, the loading rate hardly inflences the destruction area arround the borehole; during the unloading process, the destruction area arround the borehole is related to the initial unloading stress and the unloading rate. The stress and the unloading rate at the hole location shall be synthetically considered in the placing of bedding boreholes.
- extra-thick coal seam /
- horizontal slice mining /
- stability of kilometer drilling /
- mining floor

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参考文献(18)

[1]	姚宁平. 我国煤矿井下近水平定向钻进技术的发展[J]. 煤田地质与勘探, 2008,36(4): 78-80.(YAO Ning-ping. Development trend of nearly horizontal directional drilling technology in coal mines of China[J]. Coal Geology & Exploration,2008,36(4): 78-80.(in Chinese))
[2]	刘春. 松软煤层瓦斯抽采钻孔塌孔失效特性及控制技术基础[D]. 博士学位论文. 徐州: 中国矿业大学, 2014.(LIU Chun. Study on mechanism and controlling of borehole collapse in soft coal seam[D]. PhD Thesis. Xuzhou: China University of Mining and Technology, 2014.(in Chinese))
[3]	薛飞. 无煤柱煤与瓦斯工程中抽采钻孔采动破坏机理研究[D]. 博士学位论文. 徐州: 中国矿业大学, 2015.(XUE Fei. Mining-induced fracture mechanism of extraction borehole in integrated pillarless coal production and methane extraction[D]. PhD Thesis. Xuzhou: China University of Mining and Technology, 2015.(in Chinese))
[4]	孙新胜, 王力, 方有向, 等. 松软煤层筛管护孔瓦斯抽采技术与装备[J]. 煤炭科学技术, 2013,41(3): 74-76.(SUN Xin-sheng, WANG Li, FANG You-xiang, et al. Technology and equipment of screen pipe protected borehole of gas drainage in soft seam[J]. Coal Science and Technology,2013,41(3): 74-76.(in Chinese))
[5]	李定启, 邓广涛, 李海贵, 等. 钻杆内下套管防治软煤层钻孔塌孔技术[J]. 中国安全生产科学技术, 2015,11(2): 95-98.(LI Ding-qi, DENG Guang-tao, LI Hai-gui, et al. Technology of preventing drilling hole collapse in soft coal seam by inserting casing in drill pipe[J]. Journal of Safety Science and Technology,2015,11(2): 95-98.(in Chinese))
[6]	陈功胜, 高艳忠. 松软煤层瓦斯抽采钻孔不提钻下入筛管技术[J]. 辽宁工程技术大学学报(自然科学版), 2014,33(5): 592-596.(CHEN Gong-sheng, GAO Yan-zhong. Application of technology of placing screen pipe in gas drainage boreholes without lifting rod in soft coal seam[J]. Journal of Liaoning Technical University (Natural Science),2014,33(5): 592-596.(in Chinese))
[7]	赵阳升, 郤保平, 万志平, 等. 高温高压下花岗岩中钻孔变形失稳临界条件研究[J]. 岩石力学与工程学报, 2009,28(5): 865-874.(ZHAO Yang-sheng, XI Bao-ping, WAN Zhi-ping, et al. Study critical condition of borehole instability in granite under high temperature and high pressure[J]. Chinese Journal of Rock Mechanics and Engineering,2009,28(5): 865-874.(in Chinese))
[8]	王建钧. 水平定向钻孔应力-应变及失稳机理研究[D]. 硕士学位论文. 昆明: 昆明理工大学, 2008.(WANG Jian-jun. Studies of stress-strain and instability mechanism for horizontal directional borehole[D]. Master Thesis. Kunming: Kunming University of Science and Technology, 2008.(in Chinese))
[9]	马少鹏, 王来贵, 赵永红, 等. 岩石圆孔结构破坏过程变形场演化的实验研究[J]. 岩土力学, 2006,27(7): 1082-1086.(MA Shao-peng, WANG Lai-gui, ZHAO Yong-hong, et al. Experimental study on deformation field evolution during failure procedure of a rock borehole structure[J]. Rock and Soil Mechanics,2006,27(7): 1082-1086.(in Chinese))
[10]	黄爱军. 基坑下方运营隧道卸载回弹的力学机理分析[D]. 博士学位论文. 上海: 上海交通大学, 2008.(HUANG Ai-jun. Mechanism analysis of running tunnel upheaval due to top excavation[D]. PhD Thesis. Shanghai: Shanghai Jiao Tong University, 2008.(in Chinese))
[11]	Addis M A. Reservoir depletion and its effect on wellbore stability evaluation[J]. International Journal of Rock Mechanics and Mining Sciences,1997,34(3/4): Paper No: 4.
[12]	ZHAO Hai-feng, CHEN Mian, LI Ya-wei, et al. Discrete element model for coal wellbore stability[J]. International Journal of Rock Mechanics and Mining Sciences,2012,54: 43-46.
[13]	李日富, 梁运培, 欧聪, 等. 采空区瓦斯地面抽采钻井稳定性因素分析[J]. 矿业安全与环保, 2008,35(3): 11-13, 17.(LI Ri-fu, LIANG Yun-pei, OU Cong, et al. Analysis on stability factors of surface boreholes for gob gas drainage and extraction[J]. Mining Safety & Environmental Protection,2008,35(3): 11-13, 17.(in Chinese))
[14]	刘应科. 远距离下保护层开采卸压特性及钻井抽采消突研究[D]. 博士学位论文. 徐州: 中国矿业大学, 2012.(LIU Ying-ke. Study on the depressurization effect produced by exploitation of lower distant protective coal seam and elimination of outburst hazard of the protected seams by applying gas drainage with surface boreholes[D]. PhD Thesis. Xuzhou: China University of Mining and Technology, 2012.(in Chinese))
[15]	CHEN Jin-hua, WANG Tao, ZHOU Yong, et al. Failure modes of the surface venthole casing during longwall coal extraction: a case study[J]. International Journal of Coal Geology,2012,90/91: 135-148.
[16]	钱鸣高, 石平五. 矿山压力与岩层控制[M]. 徐州: 中国矿业大学出版社, 2003.(QIAN Ming-gao, SHI Ping-wu. Mining Pressure and Strata Control [M]. Xuzhou: China University of Mining and Technology Press, 2003.(in Chinese))
[17]	王卫军, 袁越, 余伟健, 等. 采动影响下底板暗斜井的破坏机理及其控制[J]. 煤炭学报, 2014,39(8): 1463-1472.(WANG Wei-jun, YUAN Yue, YU Wei-jian, et al. Failure mechanism of the subinclined shaft in floor under mining influence and its control[J]. Journal of China Coal Society,2014,39(8): 1463-1472.(in Chinese))
[18]	王金安, 焦申华, 谢广祥. 综放工作面开采速率对围岩应力环境影响的研究[J]. 岩石力学与工程学报, 2006,25(6): 1118-1124.(WANG Jin-an, JIAO Shen-hua, XIE Guang-xiang. Study on influence of mining rate on stress environment in surrounding rock of mechanized top caving mining face[J]. Chinese Journal of Rock Mechanics and Engineering,2006,25(6): 1118-1124.(in Chinese))