多参量综合指标冲击地压预测技术研究

提出了"全局-区域-局部"多参量综合指标冲击地压预测技术,多种预测方法相互协调与配合、优势互补,形成空间上层次化全方位的预测体系,可极大提高冲击地压预测准确性。结合老虎台矿冲击地压发生机理与影响因素,提出利用微震法对采区全局范围内微震事件进行实时监测,划分具有冲击危险区域,全局范围预测冲击地压;利用电磁辐射法监测工作面及巷道近场围岩的应力场和煤岩变形破坏变化状况,确定近场围岩高冲击危险区域,局部范围预测冲击地压;采用矿压监测法和钻屑法对确定具有冲击危险的区域进行重点监测,判断冲击危险程度,对采取防治措施后的防冲效果进行检测;采用采空区气体分析法预测电磁辐射法和矿压观测法等无法监测到的采空区的冲击地压。实践证明:全局-区域-局部"多参量综合指标预测技术的各种预测方法在功能上表现出明显的互补特征,在老虎台矿的冲击地压预报中取得良好效果。

Rock Burst Prediction Technology of Multi-parameters Synthetic Index

A global-regional-local multi-parameter comprehensive index rock burst prediction technology was presented in this paper. A comprehensive spatial hierarchical prediction system was established by taking advantage of the coordination, cooperation and reciprocal advantages of multiple forecasting methods. The presented method can obviously improve the prediction accuracy rock burst. Combining with mechanism and influence factors on rock burst of Laohutai mine, the real-time monitoring on the microearthquakes in the whole mining was carried out, the danger grade of rock burst area was divided and the rock burst was predicted in global view. The electromagnetic radiation method was adopted to monitor the stress and deformation of the rock mass on the working face and around the tunnel, determine dangerous area of high rock burst in the near field and predict the local rock burst. The areas with high rock burst risk were monitored using mine pressure monitoring and drilling cuttings methods. The hazardous degree was estimated and the anti-shock effect after strengthening was evaluated. The gas analysis method was utilized to predict the rock burst in the area that the electromagnetic radiation and mine pressure methods can''t come into effect. Results show that the presented method has a typical Complementary feature and achieves good results in rock burst perdition in Laohutai mine.