In order to reveal the causes of asymmetric instability and failure during the excavation of rectangular roadways in inclined coal seams, the “equivalent radius” theoretical analysis, numerical simulation and industrial tests were carried out, based on the engineering background of the track entry of the（4-5） 06 working face in Liuhuanggou Coal Mine. The stress distribution characteristics and asymmetric failure mechanism of the surrounding rock in the inclined coal seam roadway.The research shows that: the plastic zone of the rectangular roadway surrounding rock in inclined coal seam distributes as an elliptical shape, and the angle between the long axis of the ellipse and the horizontal plane is about 20°, and the long axis development range is about 25 m. Under the unsupported roadway, the plastic zone of the right top corner and the left bottom corner is seriously developed. The vertical displacement of the roadway roof near the right top corner is large, about 420 mm; the horizontal displacement of the bottom plate near the left bottom corner is large, about 380 mm; and the deformation of the right top corner and left bottom corner of the roadway is significantly larger than that of other areas.resulting in obvious asymmetric deformation and failure characteristics of the roadway. Based on this feature, a surrounding rock control technology using long anchor cable（rod） to reinforce the large deformation area, and the application effect is favorable.

The influence of attention distribution mode on the coal mine safety monitoring behavior under the different load levels and single/multiple factors is explored, the eye tracking experiment simulation platform has been established based on the attention allocation model, the eye tracking for the three kinds of attention allocation strategies（average distribution, primary and secondary distribution, multistage distribution） vs the two kinds of mental load（low load, high load） vs the two kind of task factors（single factor and multiple factors） experiment is designed and carried out. By analyzing the eye tracking indexes of three typical safety monitoring behaviors of the subjects, such as the reaction time, accuracy rate and average continuous fixation time, the influence mechanism of the different attention allocation modes on the safety monitoring behaviors of coal mines is explored and obtained. The results show that the cognitive level and accident handling ability of the workers were lower in the multi-factor task and high load stress. The average and multistage distribution modes of attention are more likely to cause the monitors to be distracted, and thus the poorer work performance and lower fixation level are produced. The primary and secondary attention distribution mode is helpful for the monitoring personnel to obtain the key information on the screen and maintain the better response accuracy rate and fixation ability, which plays a positive role in improving the quality and efficiency of the safety monitoring work of coalmine.

各类自然灾害下的应急救灾物资需求问题是当前物资储备领域的一个研究热点.首先,从中国知网数据库检索出117篇应急救灾物资需求预测主题论文,应用Gephi可视化分析主要关键词,得到预测方法和研究对象前3类分别为案例推理、时间序列预测、灰色预测模型及地震、洪涝、台风灾害.分别综述了每类方法的发展及当前最新研究成果、每类灾害的研究重点及热点;其次,对应急救灾物资需求预测领域的文献来源进行了可视化分析,表明该领域是当前高校科研关注的前沿领域,也是多学科融合的交叉领域.最后,针对理论与现实层面的缺口,展望该领域未来的发展方向,力图为相关研究人员的科研攻关提供参考.

为提高彬长矿区含水层下伏近距离煤层群开采安全性,根据燕家河煤矿工程地质条件,采用物理模拟、数值模拟和工业性试验相结合的方法,分析了5-1,5-2,8煤覆岩采动导水裂隙带发育规律,揭示不同开采方式覆岩采动导水裂隙带发育特征,确定煤层群合理开采顺序.首先,上行开采8,5-1,5-2煤层,物理模拟确定了覆岩采动导水裂隙带发育高度分别为98.4,118.6,129.0 m,数值模拟确定了覆岩采动导水裂隙带发育高度分别为93.6,118.4,129.2 m,上述分析表明导水裂隙带未穿透直罗组含水层.其次,下行开采5-1,5-2,8煤层,数值模拟确定了覆岩采动导水裂隙带发育高度分别为60.4,75.7,145.3 m,表明导水裂隙带贯通直罗组含水层.综上分析表明了下行开采覆岩采动导水裂隙带发育高度较上行开采大,下行开采裂隙贯穿了直罗组含水层但未到达洛河组含水层.8105工作面涌水量实测表明8煤开采后覆岩采动导水裂隙带未贯通直罗组含水层,保障了工作面安全回采.

In order to measure the safety rejection sensitivity level of Chinese miners, we develop a corresponding scale on the basis of the measurement paradigm of individual rejection sensitivity, and propose a pre-test scale for miners’ safety rejection sensitivity. The formal scale was gradually revised after project analysis, reliability analysis. For the initial application of the formal scale, the individual and group differences of miners were studied by dividing the safety rejection sensitivity level, independent sample t-test and one-way ANOVA. The results show that the formal scale has good reliability and validity, including 3 scenarios of leader rejection and 7 scenarios of non-leader rejection, and 3 items in each scenario reflect the anticipation of rejection, the anxiety of safety rejection, and the anger of safety rejection; there are significant variations in the safety rejection sensitivity of miners, and most of them show slight, mild or moderate levels; the safety rejection sensitivity of miners has no differences in gender, age, educational background, seniority and position.

针对松软厚煤层综放大跨度开切眼围岩控制难题,以魏家地煤矿2303工作面开切眼为工程背景,采用数值模拟与现场实践相结合的方法,提出了三心微拱形开切眼断面形状,探讨了三心微拱形开切眼围岩应力分布特征及破坏机理,并与矩形切眼对比分析.结果 表明:三心微拱形开切眼的肩角和顶板受力均匀,能够将顶板垂直应力传递到两帮,肩部所受压应力明显减小,未出现较大应力集中现象;肩角附近围岩主要受到压剪破坏,破坏区域集中,呈“蝶形”分布;顶板围岩受到拉剪破坏,破坏区域面积减小,围岩相对稳定;且弧形顶板、肩角有利于锚杆安装.基于三心微拱形开切眼围岩破坏特征,提出了锚杆-锚索-锚网联合支护的围岩控制技术,顶板下沉量减少50％,两帮移近量减少55％;在2303工作面进行工业性试验,现场实测顶板下沉量为170 mm,两帮相对移近量为220 mm,围岩控制效果良好.

针对缓斜煤层沿空巷道偏载应力作用,两帮煤体呈现非对称大变形、破坏,巷道维护困难的问题,以魏家地煤矿2303工作面运输巷为工程背景,采用理论分析、数值分析并结合现场实践的方法,确定煤柱合理宽度并揭示倾斜煤层沿空掘巷围岩控制机理.结果表明:基于应力极限平衡及广义H-B强度破坏准则确定的煤柱塑性区宽度是个变化值,开挖扰动权重参数在0～1之间变化,煤柱塑性区宽度范围为8.1～8.5 m,结合数值分析结果,最终确定煤柱合理宽度为5.0 m.提出煤柱帮中部近水平位移为零区域(承压区)短锚索支护、实体煤侧压剪破坏严重区域(深度达6～7 m)高强度锚索支护的高预应力让压控制技术.巷道掘进期间两帮移近量为160 mm,顶板下沉量为65 mm,只需起底一次,围岩控制效果良好.

针对魏家地煤矿2303工作面开切眼大断面、大倾角的控制与施工难题,采用理论分析的方法,优化确定了开切眼支护参数,并提出锚索网耦合让压支护、木顶柱支护的一次成巷技术.研究结果表明:通过锚杆与托板等强、锚杆与锚索同步承载的耦合让压技术实现开切眼的有效控制,而对综掘机履带板、转载机皮带、油箱前部排气孔的适应性改进,提高了掘进效率.

For problems of complex modeling, difficult invalid data collection and low prediction precision of existing residual life prediction methods of mine-used cable, a residual life prediction method of mine-used cable was proposed which was based on gray prediction and multi-scale quantum harmonic oscillator algorithm(MQHOA). Dielectric dissipation factors and aging time under different temperature are collected firstly in accelerated hygrothermal aging test. Then residual life prediction model of mine-used cable is established by use of gray prediction GM(1,1) model and the collected data, which takes dielectric dissipation factor of 5% as ending criterion of cable life. Finally, MQHOA is used to optimize parameter of the GM(1,1) model to improve prediction precision. The test result shows that the method has short test time and higher correctness.

为提高煤炭资源回采率、延长矿井服务年限和实现厚薄煤层间合理配采,开展了近距离煤层群下伏厚煤层综放开采下上行开采可行性研究.基于燕家河煤矿近距离煤层群5-1,5-2及8煤地质条件,采用理论分析、物理模拟、数值模拟和现场实测等研究方法分析了8煤综放开采采场覆岩运移规律及破断特征,掌握了上覆5-1,5-2煤层与岩层的破坏特征及变形规律,确定了5-1,5-2煤层上行开采可行性.研究表明,8煤覆岩冒落带高度为16～26.7 m.5-1煤位于8煤裂隙带下层位,处于8煤冒落带之上,5-1煤及其顶底板虽有明显弯曲变形下沉,但无台阶错动,整体连续性好.5-2煤位于8煤裂隙带与冒落带过渡层位,接近8煤冒落带;巷探表明了5-2煤处于整体下沉,顶底板无台阶错动,整体连续性较好.除内错采空区0～25 m的5-1,5-2煤层破坏较严重外,其余范围的5-1,5-2煤层结构连续完整,均可上行开采.

Miners safety integrity is one of the important factors that cause unsafe behavior to occur. In order to study the relationship between miners' safety integrity and unsafe behavior,the miners' safety integrity was divided into safety attitude integrity and safety ability integrity,and a research model was built for studying relationships between miners' safety integrity,miners' safety compliance,and safety participation.For the model,behavior intention was taken as the mediating variable. An investigation on 212 miners from5 coal mines was conducted. The data were analyzed by SEM technique. Study shows that the safety ability integrity of miners has positive effects on their compliance behavior and participation behavior,however it has not a significant correlation with behavior intention; safety attitude integrity of miners has positive effects on their compliance behavior,and influences the participation behavior only through the mediating variable of behavior intention.

In order to study miners'unsafe behavior influencing factors,28 miners'unsafe behavior influencing factors were summed up according to the intrinsic and extrinsic factors with the literature review method.On the basis of this theory,a miners' unsafe behavior influencing factors questionnaire was prepared,the statistical analysis of the questionnaire data was made with factor analysis method,and a index system of miners'unsafe behavior influencing factors was established.In addition,the index weight value of all levels were determined and the miners'unsafe behavior influencing factors were importantly analyzed.This study provided a theoretical basis for controlling miners'unsafe behaviors.

In this paper, the behavior observation and behavior sampling methods were applied to collect the miners' unsafe behaviors and a database of the miners' unsafe behaviors was built;the quantitative analysis was made on the correlation degree between the working environmental factors of the miners and the influence factors of unsafe behaviors on the basis of the stratified correlation analyzing method and the database of the unsafe behaviors. The research results showed that the external factors were closely correlated with the miners' behaviors, the correlation degree between them is 81. 3%;in the external factors, there is a greatest correlation degree between the environmental factors and the miners' unsafe behaviors, it is 33. 4%.

Through the analysis of major fatal accidents in China's coal mines in 1980—2010,it showed that human errors accounting for up to 97.6% of total direct accidental causes.Based on the literature review of unsafe behavior's factor and with the object study of G mine's N1301 face's miners,a factors' set which consists of 4 first-level factors and 16 second-level factors was determined.And the network model of unsafe behavior factors was established by using analytic network process(ANP).Then handed out the scoring tables and made a comparison of unsafe behavior's factors.The weights of first-level and second-level were calculated by using Super Decisions software and got the order of 16 second-level factors' weights.Finally,according to the results,the importance of the factors was analyzed,which would provide a direction for preventing the miners' unsafe behavior,and put forward some control measures of coal miners' unsafe behavior.

针对下沟煤矿巨厚煤层低位放顶煤开采采出率低的问题,通过分析顶煤损失的主要构成及其形成原因,提出提高顶煤采出率的优化措施:加长工作面推进长度和工作面长度,端头支架实现放煤功能,放煤步距采用"两采一放"和提高放煤时间,顶煤采出率从75%提高到89%,取得了良好地效果。

A method with non-grounded neutral point is widely used in the power system of mine,the fault line via on-line insulation monitoring system can be found out.On the basis of analyzing problems existed in the existing leakage protective equipment,the simulation research of insulation parameter on-line monitoring for mine low voltage cable with additional low frequency signaling based on Matlab simulation technology is adopted and the principle and implementation method of insulation parameter on-line monitoring function are introduced.Elective earth leakage protection can be realized.