箭竹坪矿区童子岩组第三段含煤地层特征分析

箭竹坪矿区含煤岩系主要为下二叠统童子岩组第三段(P1t3)的中(P1t32)、下亚段(P1t3-1),可采煤层为21、22、28等三层煤层。煤层厚度大都在0.62～0.89m之间,为简单结构、较稳定煤层。本区21、22煤层为富灰、特低硫、低磷、中发热量一号无烟煤;28煤层为中灰、特低硫、低磷、中高发热量一号无烟煤。煤系厚度虽然变化较大,但旋回结构与粒度韵律清晰,且变化有一定规律。

基于时空关系的复杂交互行为识别

提出了一种基于时空关系和多观察值的三层隐马尔科夫扩展模型识别复杂交互活动的方法。根据多目标交互活动具有分层的性质和目标之间的时空关系,给出了提取3个粒度(整体,双人,单人)行为特征的方法。同时提出与之对应的多观测值三层隐马尔科夫扩展模型。实验结果表明:将新的特征提取方法和新的模型应用于复杂交互行为识别能得到较高的识别准确率和较好的鲁棒性。

对流扩散方程的三层 WENO-MMOCAA 差分方法

本文把三层修正特征线法,MMOCAA 差分方法及WENO 插值相结合,提出了求解对流扩散方程的三层WENO-MMOCAA 差分格式.此格式关于时间具有二阶精度,关于空间具有二阶以上精度且可避免基于二次以上Lagrange 插值的三层MMOCAA 差分方法在解的大梯度附近所产生的振荡.本文使用新的分析方法,给出了格式的误差估计.本文的数值算例表明新格式可消除振荡.

Characteristics of compression fracture of ＂three soft＂ coal bed by perfusion and gas sucking technique

Against the particularity of stratum-structure in ＂three soft＂ mine areas, according to rock indoor test and on-site sucking experiment, discussed the characteristics of argillization, compression fracture and sucking technique of soft coal with low permeability. It is clearly pointed out that the gas can be highly effectively sucked only by compression fracture along the occurrence of the coal seam, creating inter-seams crack belt because of the difference of bulgy deformation. After the flooding experiment in the 24080 workface of Pingdingshan No. 10 mine, the average single-bore volume of gas increases from 77 m3 to 7 893 mS, while decay cycle extended from 7 days to 80-90 days. Also, the single-bore extracting rate of gas increases to 33%.