CAJ | 학술논문

煤矿冲击矿压现象日益严峻,作为矿山动力灾害的主要监测手段,微震监测系统已在许多矿井广泛使用,为保证矿震定位和能量计算的准确,提高预测预报煤矿冲击矿压的可行性,应建立一套台网布设优化及评价系统.应用微震定位和D值优化设计理论,结合煤矿实际条件研究了影响矿震定位精度的主要因素和不利条件,并提出了采用综合指数法确定煤矿高微震活动区域和区域内矿震发生的概率,制定了台站候选点和监测区域确定的一般原则.通过理论分析震中和震源标准差反映台网定位能力的不足,建立基于数值仿真实验方法的震中与震源误差期望值模型,最终形成台网布设优化及评价系统.实验和现场应用结果表明,该系统能够快速确定台网最优布设方案,准确评价台网定位能力,满足煤矿微震监测的需要.
매광충격광압현상일익엄준,작위광산동력재해적주요감측수단,미진감측계통이재허다광정엄범사용,위보증광진정위화능량계산적준학,제고예측예보매광충격광압적가행성,응건립일투태망포설우화급평개계통.응용미진정위화D치우화설계이론,결합매광실제조건연구료영향광진정위정도적주요인소화불리조건,병제출료채용종합지수법학정매광고미진활동구역화구역내광진발생적개솔,제정료태참후선점화감측구역학정적일반원칙.통과이론분석진중화진원표준차반영태망정위능력적불족,건립기우수치방진실험방법적진중여진원오차기망치모형,최종형성태망포설우화급평개계통.실험화현장응용결과표명,해계통능구쾌속학정태망최우포설방안,준학평개태망정위능력,만족매광미진감측적수요.
The rockburst phenomenon caused mostly by mining-induced tremors becomes progressively more severe as the mining depth and extent increase. Microseismic monitoring technique, as the major investigation tool for the monitoring of rockburst and other mining dynamic hazards, has been widely used in many coal mines around the world. To ensure the accuracy of seismic source locating and energy calculation, and further improve the feasibility of rockburst forecasting, an optimal design and assessment system of network configuration needs to be built first. In this paper, according to practical conditions and requirements of coal mines, especially the accuracy of picking seismic wave arrivals at stations and building velocity model, the main influencing factors and bad conditions which influence the accuracy of source location were analyzed using the theory of D-optimal design and localization. A view of using the comprehensive index method to determine the high microseismic activity zones and the occurrence probability of mining-induced tremors were also proposed. Then, the general principle of choosing candidate points of geophone stations and monitoring area were established. In addition, since the location capacity of network can't be reflected accurately using the source standard error calculated by the traditional theoretical analysis, the model of expected epicenter and hypocenter error was created by numerical emulation experiment, and then the optimal design and assessment system of network was built up finally. The results from experiment and field practice show that, the optimal design and assessment system can be used to solve the optimal plan of network quickly, evaluate the location ability of network exactly, and can satisfy the requirements of microseismic monitoring in coal mines quite well.