千米深井高应力破碎围岩控制技术

doi:10.11872/j.issn.1005-2518.2020.06.112

黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 885-893.doi: 10.11872/j.issn.1005-2518.2020.06.112

千米深井高应力破碎围岩控制技术

王成龙¹(),侯成录²,杨尚欢²(),赵兴东³

^1.山东黄金集团有限公司烟台矿业事业部，山东莱州 261440
^2.山东黄金矿业（莱州）有限公司三山岛金矿，山东莱州 261442
^3.东北大学采矿地压与控制研究中心，辽宁沈阳 110819

收稿日期:2020-06-14 修回日期:2020-07-29 出版日期:2020-12-31 发布日期:2021-01-29
通讯作者: 杨尚欢 E-mail:292506006@qq.com;kdta2007@126.com
作者简介:王成龙（1972-），男，山东郓城人，高级工程师，从事采矿工程管理工作。292506006@qq.com
基金资助:
中央高校基本科研业务费专项“深部强采动诱致采场围岩失稳判别及其响应特征”(N2001033);NSFC-山东联合基金项目“胶西北滨海深部含金构造探测与采动灾害防控机理研究”(U1806208)

Control Technology of High Stress Broken Surrounding Rock in Kilometer Deep Shaft

Chenglong WANG¹(),Chenglu HOU²,Shanghuan YANG²(),Xingdong ZHAO³

^1.Yantai Mining Business Department of Shandong Gold Co. ，Ltd. ，Laizhou 261440，Shandong，China
^2.Sanshandao Gold Mine，Shandong Gold Mining （Laizhou） Co. ，Ltd. ，Laizhou 261442，Shandong，China
^3.Geomechanics Research Center，Northeastern University，Shenyang 110819，Liaoning，China

Received:2020-06-14 Revised:2020-07-29 Online:2020-12-31 Published:2021-01-29
Contact: Shanghuan YANG E-mail:292506006@qq.com;kdta2007@126.com

摘要/Abstract

摘要：

针对千米深井高应力破碎围岩控制难题，以三山岛金矿大埋深巷道为工程背景，通过现场工程地质调查，获取围岩结构面信息，并结合室内岩石力学试验，进行岩体质量分级和岩体参数估算；基于RMR和Q支护图表，确定采用“喷射混凝土+锚杆+钢筋网+双筋条”方法对研究区域进行支护；应用RS2和Unwedge软件分析巷道支护前后围岩塑性区、位移和潜在楔形体安全系数的变化特征。结果表明：巷道支护后，围岩塑性区和位移显著减小，潜在楔形体安全系数明显增大，提出的支护方案能够确保巷道稳定。由此可知，经验法与数值模拟法相结合的综合研究方法可以准确地分析巷道稳定性情况，并确定更可靠的支护方案，为矿山安全生产提供可靠保障。

关键词: 千米深井, 高应力, 破碎围岩, 岩体分级, 围岩支护, 数值模拟

Abstract:

The deep mining has become an inevitable trend of the world’s metal deposit mining with the depletion of shallow metal mineral resources.The surrounding rocks in deep stopes and roadways are often in a complex stress environment of “three highs and one disturbance”.The surrounding rocks in deep roadways often suffer from collapsed，rock bursts and other damages，which causing ore loss and depletion，equipment damage and casualties，and seriously hindering the production of mines.The Sanshandao gold deposit is the earliest discovered large-scale gold deposit of altered rock in the broken zone.The structure faulted is the mainly faulted in the area.The Xinli fault zone located in the northeast of the Sanshandao-Cangshang fault zone is an ore-controlling faulted structure in the mining area.The rock mass in the fault zone is subject to strong weathering and tectonic movement.The cracks are very developed and the surrounding rock strength is low.The roof collapse often occured during tunneling.Therefore，it is necessary to take timely and effective support measures for deep high-stress fractured surrounding rocks.In this paper，the deep roadway of Sanshandao gold mine is used as the engineering background.Through field engineering geological surver，and the discontinuity information of surrounding rock at -1 005 m level in Sanshandao gold mine was obtained.The surrounding rock is mainly distributed with three sets of joints，and one set is nearly parallel to the axial direction of the roadway and the inclination angle is about 90°.The laboratory studies were carried out.Rock mass classfication were estimated，accordingly.Q=1.5，RMR=40.25，GSI=35.The quality of the rock mass is poor.Roclab software was used to estimate the mechanical parameters of the rock mass，and the compressive strength and tensile strength of the rock mass are 3.477 MPa and 0.003 MPa，respectively.The rock mass strength is low.Based on the support charts with RMR and Q，the shotcrete + anchor + reinforcement mesh + double bars support method was adopted in the study area.The RS2 and Unwedge software were used to analyze the change characteristics of surrounding rock plastic zone，displacement and potential wedge safety factor before and after roadway support.The results show that after the roadway is supported，the vertical displacement of the roadway roof is reduced from 2.2 cm to 0.76 cm.The plastic zone of the roadway roof is reduced from 4.481 m to 1.634 m，the leftwall plastic zone is reduced from 1.760 m to 0.859 m，and the rightwall plastic zone is reduced from 1.830 m to 0.860 m，the safety factor of the potential wedge of the roadway roof increased from 1.5 to 22.7.The plastic zone and displacement of the surrounding rock are significantly reduced，and the potential wedge safety factor is significantly increased.The proposed support scheme can ensure the stability of the roadway.Therefore，the comprehensive research method of combining the empirical method and numerical simulation can accurately to analyze the stability of the roadway and determine a more reliable support scheme.It provides a reliable guarantee for the mine safety production.

Key words: kilometer deep shaft, high stress, fractured surrounding rock, rock mass classification, rock support, numerical simulation

中图分类号:

TD353

王成龙,侯成录,杨尚欢,赵兴东. 千米深井高应力破碎围岩控制技术[J]. 黄金科学技术, 2020, 28(6): 885-893.

Chenglong WANG,Chenglu HOU,Shanghuan YANG,Xingdong ZHAO. Control Technology of High Stress Broken Surrounding Rock in Kilometer Deep Shaft[J]. Gold Science and Technology, 2020, 28(6): 885-893.

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测点位置	节理组数	倾向(°)/倾角(°)	结构面条数	节理间距/m	结构面线密度/（条·m^-1）	结构面状况
-1 005 m中段巷	3组+随机	110/85	10	0.52	1.91	裂隙较发育，节理面光滑到一般，波状，少数节理面平直，部分充填泥质，微风化至弱风化，干燥
		48/46	8	0.47	2.12
		274/58	6	0.92	1.09

位置	Q				RMR			稳定性	GSI数值
位置	数值	级别	描述		数值	级别	描述	稳定性	GSI数值
-1 005 m中段	1.50	Ⅲ	很差—差		40.25	Ⅲ	一般	（5 m跨度）7 d	35

参数名称	数值
抗压强度σ_c/MPa	3.477
抗拉强度σ_t/MPa	-0.003
弹性模量E/Gpa	0.48
内聚力c/MPa	1.17
内摩擦角φ/（°）	22.3

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千米深井高应力破碎围岩控制技术

Control Technology of High Stress Broken Surrounding Rock in Kilometer Deep Shaft

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