矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2015年
2期
104-107
,共4页
赵飞%杨双锁%李平%李树峰%崔健
趙飛%楊雙鎖%李平%李樹峰%崔健
조비%양쌍쇄%리평%리수봉%최건
底鼓%软岩巷道%高应力%深部矿井
底鼓%軟巖巷道%高應力%深部礦井
저고%연암항도%고응력%심부광정
floor heave%soft rock roadway%high stress%deep mine
针对阳煤五矿赵家分区井底车场矸石装车线巷道的强烈底鼓问题,通过现场底板破坏特征分析,以及FLAC3 D内置的应变软化模型与摩尔库伦模型对构造应力场的对比分析,揭示了高应力软岩巷道强烈底鼓的原因:底板岩体经应变软化后水平应力释放较大,应力值较低,在二次水平应力的作用下,发生峰后扩容产生强烈底鼓。底板必须与顶帮形成一样的支护强度,才能使巷道断面受力均匀。数值模拟与工程实践证明,采用底板锚注技术后底鼓得到了有效的控制。
針對暘煤五礦趙傢分區井底車場矸石裝車線巷道的彊烈底鼓問題,通過現場底闆破壞特徵分析,以及FLAC3 D內置的應變軟化模型與摩爾庫倫模型對構造應力場的對比分析,揭示瞭高應力軟巖巷道彊烈底鼓的原因:底闆巖體經應變軟化後水平應力釋放較大,應力值較低,在二次水平應力的作用下,髮生峰後擴容產生彊烈底鼓。底闆必鬚與頂幫形成一樣的支護彊度,纔能使巷道斷麵受力均勻。數值模擬與工程實踐證明,採用底闆錨註技術後底鼓得到瞭有效的控製。
침대양매오광조가분구정저차장안석장차선항도적강렬저고문제,통과현장저판파배특정분석,이급FLAC3 D내치적응변연화모형여마이고륜모형대구조응력장적대비분석,게시료고응력연암항도강렬저고적원인:저판암체경응변연화후수평응력석방교대,응력치교저,재이차수평응력적작용하,발생봉후확용산생강렬저고。저판필수여정방형성일양적지호강도,재능사항도단면수력균균。수치모의여공정실천증명,채용저판묘주기술후저고득도료유효적공제。
To counter to the problem of serious floor heave in the waste-loading roadway at the bottom in Zhaojia District of Yangquan No. 5 Mine, the causes of the serious floor heave occurred in the high-stress soft-rock roadway were revealed through the analysis of the floor failure characteristics and the comparative analysis of the built-in stain softening model in FLAC3D and the molar Coulomb model with the structural stress field;the horizontal stress of the floor rock was greatly released after the strain softening, the stress value was small, and under the action of the secondary horizontal stress, the post-peak dilatation caused the occurrence of the serious floor heave. The bottom and two sides of the roadway must have the same support strength so as to make a uniform force on the roadway section. The numerical simulation and engineering practice proved that the floor heave was under effective control after the floor anchor and grouting technology was applied.