摘要
平煤十矿采用三维套孔应力解除地应力测量技术和具有温度补偿功能的空心包体应变计,完成了矿区6个水平、11个测点的现场地应力实测,最大测点深度达到1123 m.这是我国煤矿首次采用应力解除法进行系统的矿区地应力测量并且测量深度超1100 m.通过测量获得了矿区11个测点的三维地应力状态,揭示了矿区地应力场的分布规律,建立了矿区地应力场模型.针对平煤十矿是我国典型的高瓦斯矿井、深部采矿存在引发煤(岩)爆和瓦斯爆炸的高危险性,本文提出:根据实测地应力数据,采用数值模拟技术,定量计算开挖扰动引起的开采煤层和围岩中能量聚集状况及其随采矿过程的变化规律,借助地震学的知识,根据能量聚集状态对未来开采可能引发煤(岩)爆的时间、地点和震级进行预测.
In situ stress measurements were carried out at 11 points of 6 levels in the 10th Mine owned by Pingdingshan Coal Group, using a three-dimensional （3D） overcoring stress measurement technique and hollow inclusion strain gages. The maximum measuring depth reaches 1123 m, and it is the first time to apply the overcoring technique to make systematical stress measurements with the measuring depth exceeding 1100 m at coal mines. 3D in-situ stress states at these 11 points were determined by the measurements. Based on measuring results, the regularities of in situ stress states in the mine were obtained and a mathematical model of regional stress field was also established. According to the high risk of coal （rock） bursts and gas explosion in deep mining of the coal mine, a method for predicting coal （rock） bursts was provided as follows. Based on numerical simulation and in situ measurement results, quantitative calculations are made of energy accumulation and its variation with mining process in the rock （coal） mass and surrounding rock, and then according to accumulated energy distribution, the seismology technology is used to predict the place, time and magnitude of coal （rock） bursting induced by future mining.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2013年第11期1399-1406,共8页
Journal of University of Science and Technology Beijing
基金
'十一五'国家科技支撑计划资助项目(2006BAK04B02)
国家自然科学基金重点资助项目(51034001)
关键词
煤矿
应力测量
应力分析
数学模型
岩爆
预测
coal mines
stress measurement
stress analysis
mathematical models
rock burst
prediction
