摘要
在分析煤矿井下围岩强度、结构面和岩层倾角对空心包体应力解除法地应力测量影响的基础上，提出在煤层顶板采用空心包体应力解除法进行地应力测量时，利用检测钻孔孔内围岩信息确定测量层位的方法。在测点附近首先施工检测钻孔，在孔内进行围岩结构观测和围岩强度测试，结合两方面测试结果设计测量钻孔参数；采用该方法能大幅度提高测试成功率及测试数据质量。通过井下实测，介绍该方法的应用过程和测试效果，并提出测量钻孔轴线与岩层层面夹角以30～60＆#176;为宜。
On the basis of analyzing the influence of surrounding rock strength, structural surface and strata inclined angle on hollow-inclusion stress relief method, it was put forward that applying information in detection borehole to selecting measurement layer.By constructing detection borehole near measurement point, measurement borehole parameters could be designed considering surrounding rock structure detection and strength test result.This method could largely improve measurement’ s success rate.Underground applica-tion process and measurement effect was introduced and it was put forward that the intersection angle between axial line of borehole and layer plane should be 30~60＆#176;.
出处
《煤矿开采》
北大核心
2015年第4期18-22,共5页
Coal Mining Technology
基金
国家自然科学基金委员会与神华集团有限公司联合资助项目(U1261211)
国家科技支撑计划课题(2012BAK04B06)
关键词
空心包体应力解除法
地应力测量
围岩条件
检测钻孔
测量钻孔
hollow-inclusion stress relief method
geo-stress measurement
surrounding rock condition
detection borehole
meas-urement borehole
