隔离矿柱巷道围岩松动圈分布规律的测试  

Loose Circle Distribution Survey of Roadway Surrounding Rock of Isolation Pillar

作　　者：张海磊[1] 刘涛[1] 郭生茂[1] 孙嘉[1] 王成财[1] 周健强[1] 

机构地区：[1]西北矿冶研究院,甘肃白银730900

出　　处：《金属矿山》2014年第7期151-155,共5页Metal Mine

基　　金：国家重点基础研究发展计划(973计划)项目(编号:2010CB732004)

摘　　要：诸多经验表明,深部巷道的松动圈的分布特点将对支护设计有重要影响。为确定我国华东某铜矿山隔离矿柱回采时,充填体下新开挖的出矿巷道所需预留的顶板厚度及其支护方式,需要了解巷道周边松动带的范围,确定巷道围岩的不稳定区域。通过对松动圈理论及影响松动圈范围因素的研究,制定合理的松动圈测试方案,利用RSM-SY5声波仪对矿山隔离矿柱巷道围岩进行松动圈现场测试,并对测试结果进行分析,得出沿孔深方向的波速变化曲线(即VP-L曲线)及巷道围岩松动圈范围的截面图;根据松动圈支护理论及松动圈测试结果,对矿山隔离矿柱巷道围岩稳定情况进行研究及分析,并给出支护建议。实践表明,松动圈测试作为岩石内部变形的监测手段,能够全面且真实地反映矿山巷道的破坏情况及其随着回采过程的破坏趋势,可为评价巷道稳定及巷道变形支护提供科学的指导。Numerous experiences shows that the distribution of loose circle of deep roadway has a major impact on sup- port design. It is necessary to master the scope of the roadway surrounding loose and determine unstable region of roadway for determining roof safety thickness and support pattern of roadway under fillings, when isolated pillars are stoped in a mine in East China. By studying the loose circle theory and its influencing factors, a reasonable rational loose circle test program is put up. The velocity curves along the hole depth direction （ Vp-L curve） and the sectional view of the roadway loose area are ob- tained by field tests of isolated pillar mine roadway loose circle with RSM-SY5 acoustic instrument and analysis on the test re- sults. According to the theory of loose circle support and the field tests, some research and analysis on isolation pillar roadway stability are carried out and one support recommendation is put forward. As a means of monitoring the internal deformation of the rock,loose circle test can fully reflect the real destruction and trend of mine roadway with the stoping process in mine work- ings,which provides scientific guidance to evaluate the stability of roadway and support the roadway in deformation.

关 键 词：隔离矿柱 巷道围岩 松动圈 声波测试 巷道支护 

分 类 号：TD3[矿业工程—矿井建设]