CAJ | 학술논문

以新疆喀拉通克铜镍矿为原型,运用地质力学模型试验,深入分析深孔诱导崩落开采过程中人工顶板和上、下盘围岩力学演化规律.试验在自行设计的BLES双向加载岩体开挖模拟试验台上,模拟开采环境再造深孔诱导崩落充填采矿法的8个开采步骤.试验结果表明:(1) 在开挖1~#,2~#凿岩硐室以及切割拉底时,上、下盘围岩应力和位移都呈缓慢增加的趋势,而人工顶板中部应力值逐渐减小,处于受拉状态.开挖V型堑沟、诱导崩落矿体时,上盘围岩和下盘围岩应力值随开挖步骤急剧增加.上、下盘围岩底部和人工顶板的左端应力值分别达到初始应力的2.2,2.14和2.53倍,应力集中现象明显.(2) 开挖完成后,人工顶板和上、下盘围岩最大沉降量分别为8.6,6.5和2.8 cm,满足矿山安全要求.上盘围岩的变形明显大于下盘围岩的变形,且有整体移动现象.(3) 构筑9 m厚的人工顶板,在整个试验过程中未出现破裂等破坏现象,实现采矿环境再造,同时确保试验采场的稳定性和安全性.
이신강객랍통극동얼광위원형,운용지질역학모형시험,심입분석심공유도붕락개채과정중인공정판화상、하반위암역학연화규률.시험재자행설계적BLES쌍향가재암체개알모의시험태상,모의개채배경재조심공유도붕락충전채광법적8개개채보취.시험결과표명:(1) 재개알1~#,2~#착암동실이급절할랍저시,상、하반위암응력화위이도정완만증가적추세,이인공정판중부응력치축점감소,처우수랍상태.개알V형참구、유도붕락광체시,상반위암화하반위암응력치수개알보취급극증가.상、하반위암저부화인공정판적좌단응력치분별체도초시응력적2.2,2.14화2.53배,응력집중현상명현.(2) 개알완성후,인공정판화상、하반위암최대침강량분별위8.6,6.5화2.8 cm,만족광산안전요구.상반위암적변형명현대우하반위암적변형,차유정체이동현상.(3) 구축9 m후적인공정판,재정개시험과정중미출현파렬등파배현상,실현채광배경재조,동시학보시험채장적은정성화안전성.
Based on the prototype of the Kalatongke Copper-nickel Mine in Chian's Xinjiang Autonomous Region,the geological mechanics modeling test is made to deeply analyze the artificial roof,upper and lower surrounding rock evolution rules of mechanical induced by deep-hole induced caving excavation. The model test in the simulation test system of rocks excavation under bidirectional loading is carried out. The process of mining environment regeneration with deep-hole induced caving and filling in 8 excavation steps is simulated. The test results show that:(1) when #1 and #2 drilling chamber and under drilling driftway are excavated,the stress and deformation of upper and lower surrounding rocks increase slowly,but the stress of middle part of artificial roof gradually decreases,it is in tension. When the V-shaped trench are excavated,the stresses of upper and lower surrounding rock increase quickly. The stress of upper surrounding rocks bottom,lower surrounding rocks bottom and left part of artificial roof reaches 2.2,2.14 and 2.53 times of the in-situ stress,respectively. Stress concentrates in these parts;(2) After the final excavation,the maximum subsidence of upper and lower surrounding rocks and artificial roof reaches 6.5,2.8 and 8.6 cm respectively,which can meet the requirements of mine safety. The upper surrounding rock has the phenomenon of whole deformation;(3) The 9 m thickness of artificial roof does not break during the whole model test,it achieves the mining environment regeneration,and ensures the safety and stability of the whole test stope.