中国材料进展
中國材料進展
중국재료진전
Materials China
2015年
10期
658-664
,共7页
围岩分级%BQ 法%岩爆%隧道
圍巖分級%BQ 法%巖爆%隧道
위암분급%BQ 법%암폭%수도
rock mass classification%BQ method%rockburst%tunnel
探讨优化工程岩体分级标准 BQ 方法，使其更好地应用于岩爆隧道中。（1）综合 RSR法、RMR 法和 HC 法对结构面产状、洞轴线方向和掘进方向对围岩稳定性影响的考虑，对主要软弱结构面产状影响修正系数（K 2）进行了优化。当结构面走向与洞轴线垂直并且结构面陡倾，倾向与掘进方向同向时，围岩稳定性最好，K 2取小值；当结构面走向与洞轴线平行时，围岩稳定性最差，K 2取大值。（2）结合岩爆烈度分级体系，针对硬岩高地应力隧道，对初始应力状态影响修正系数（K 3）进行了优化。轻微岩爆对围岩基本质量指标 BQ 值较高的围岩影响较小，K 3取小值；岩爆级别越高，对围岩的稳定越不利，K 3取大值。对四川泥巴山隧道的部分掌子面围岩应用优化后的 BQ 方法重新计算[BQ]值并确定级别，分级结果与实际情况更吻合，能更好地用于确定围岩支护措施。
探討優化工程巖體分級標準 BQ 方法，使其更好地應用于巖爆隧道中。（1）綜閤 RSR法、RMR 法和 HC 法對結構麵產狀、洞軸線方嚮和掘進方嚮對圍巖穩定性影響的攷慮，對主要軟弱結構麵產狀影響脩正繫數（K 2）進行瞭優化。噹結構麵走嚮與洞軸線垂直併且結構麵陡傾，傾嚮與掘進方嚮同嚮時，圍巖穩定性最好，K 2取小值；噹結構麵走嚮與洞軸線平行時，圍巖穩定性最差，K 2取大值。（2）結閤巖爆烈度分級體繫，針對硬巖高地應力隧道，對初始應力狀態影響脩正繫數（K 3）進行瞭優化。輕微巖爆對圍巖基本質量指標 BQ 值較高的圍巖影響較小，K 3取小值；巖爆級彆越高，對圍巖的穩定越不利，K 3取大值。對四川泥巴山隧道的部分掌子麵圍巖應用優化後的 BQ 方法重新計算[BQ]值併確定級彆，分級結果與實際情況更吻閤，能更好地用于確定圍巖支護措施。
탐토우화공정암체분급표준 BQ 방법，사기경호지응용우암폭수도중。（1）종합 RSR법、RMR 법화 HC 법대결구면산상、동축선방향화굴진방향대위암은정성영향적고필，대주요연약결구면산상영향수정계수（K 2）진행료우화。당결구면주향여동축선수직병차결구면두경，경향여굴진방향동향시，위암은정성최호，K 2취소치；당결구면주향여동축선평행시，위암은정성최차，K 2취대치。（2）결합암폭열도분급체계，침대경암고지응력수도，대초시응력상태영향수정계수（K 3）진행료우화。경미암폭대위암기본질량지표 BQ 치교고적위암영향교소，K 3취소치；암폭급별월고，대위암적은정월불리，K 3취대치。대사천니파산수도적부분장자면위암응용우화후적 BQ 방법중신계산[BQ]치병학정급별，분급결과여실제정황경문합，능경호지용우학정위암지호조시。
This paper discusses the BQ method that optimize the standard for engineering classification of rock masses so that it can be applied in the rockburst tunnel more effectively.The orientation of the rock mass structural plane,the direction of the tunnel axis and the tunneling direction have influences on the rock mass stability,which RSR,RMR and HC methods are considered.Integrating these considerations,the correction coefficient (K 2 )influencing the main weak structural plane orientation is been optimized.When the strike of the structural plane is perpendicular to the tunnel axis and the structural plane is inclined to the same direction with the tunneling,the stability of the surrounding rock mass is good,so K 2 gets a large value.When the strike of the structural plane parallel to the tunnel axis,the stability of the surrounding rock mass is poor,so K 2 gets a small value.Combined with the intensity of rock burst,the correction coefficient (K 3 )influencing the initial stress state is optimized based on the high initial stress of hard rock mass.A slight rock burst has little effect on the <br> surrounding rock with a high value of the rock mass basic quality index (BQ),so K 3 gets a small value.The higher class of the rock burst,the poorer stability of the surrounding rock mass,so K 3 gets a large value.The paper uses the optimized BQ method to recalculate the [BQ]value of some surrounding rock of the working face in the Niba mountain tunnel.It is found that the classification results are more coincide with the actual conditions.So the supporting methods of the surrounding rock can be more accurately selected by this optimized method.
