With the development of outburst prevention technology and the improvement of management level in China's outburst mines in the new era, the classification of outburst coal seams has important guiding significance for the further refinement, improvement, and enhancement of China's outburst mine gas prevention and control system.Therefore, it is necessary to further classify outburst coal seams.Through the analysis of outburst accidents with deaths of more than or equal to 3 people since 2000, a large number of basic gas parameters in the laboratory, and previous research results, in-depth discussions were conducted on the methods and basis for classification of outburst coal seams, as well as related issues such as judgment rules and critical values of indicators.It is proposed to divide outburst coal seams into two levels: 'general outburst coal seams' and 'severe outburst coal seams'.A classification method for outburst coal seams based on outburst strength has been established.The judgment rules for severe outburst coal seams have been established, including the amount of coal thrown out S, the amount of gas emitted per ton of coal Q 0 and the number of outburst times N.The critical values of the judgment indicators have been determined.Through the research, it will provide an important basis for the determination of mining procedures, outburst prevention planning and mining replacement planning, etc.

构建了由课程介绍、学习模块、重点难点指导、课程考核和拓展资源五大要素组成的课程教学资源,基于智慧职教云平台进行课前、课中和课后三阶段的混合式教学过程设计,以瓦斯传感器调校任务为例展示理实一体化混合式教学过程,为混合式教学改革进行了有益探索.

Coal pillar floor stress transfer law was researched by half plane body theory of elastic-plastic mechanics,and coal pillar floor stress transfer mechanics model is established.Combined with stress superposition principle,we get the calculation formula of coal pillar floor stress distribution,and coal pillar floor horizontal stress and vertical stress cloud was got by using MathCAD.Datong Mining Area Jurassic coal was selected as an example,different types of coal pillar horizontal stress and vertical stress distribution characteristics were analyzed.The stress magnitude and scope of vertical stress of coal pillar is the biggest,which played a leading role in the process of stress transfer.The depth of vertical stress concentration area of boundary pillar is the biggest,the depth of large section coal pillar (20 m) was the second,and the depth of small section coal pillar (10 m) was the last.Different arrangement of floor vertical stress of coal pillar was analyzed,and the overlap arrangement of coal pillar makes the depth and scope of floor stress higher.The mining of Jurassic coal group in Datong Mining Area was selected as an example,comprehensive overlapping action of coal pillar makes stress of 3-5# coal seam from 12.4 MPa to 17.3 MPa,vertical stress are increased from 1.3 MPa to 6.2 MPa under the condition of no pillar.In the area of 125 m to 280 m,the vertical stress increased obviously,we suggest that the arrangement of mining roadway at 3-5# coal seam working face should avoid this area.

Taking the roof fall accident caused by small fault structure in 20322 belt roadway in Wangjialing Coal Mine as the engineering background, field investigation was carried out on the the roof deformation and failure characteristics before the roof fall and the characteristics of the fall zone height after the roof fall, and based on this, analysis was made on the bed separation of the roof with different lithology by using RFPA numerical software. The analysis results showed that with the increase of the roof strength and stiffness, the roof stability was significantly improved. The technology of using the high pre-stressed multi-cable truss system to control the roof stability was proposed and analysis was carried out on its control effect and rational support parameters from the angle of mechanics. After the implementation of the symmetric support scheme by "multi-beam anchor cable reinforced composite", 6 places where the roof was rather broken were selected for strata control observation, the observation results showed that the roof control effect was good.

基于风险预控构建了煤矿粉尘管理综合评价体系,在危险源辨识的基础上确定了三级结构模型,采用主观和客观相结合的方式给出了指标权重,参照煤矿风险的分级方式将煤矿粉尘管理综合评价进行了分级.便于根据现场安全检查给出半定量的评价结果,对煤矿粉尘管理起到了较好的评估作用.

This paper briefly describes the characteristics and concentration of standard coal dust hazard in our country, based on the two types of hazard theory analyses the reasons for excessive dust. It is concluded that the unsafe behavior of people, unsafe state of object and en-vironmental factors are surface cause, mismanagement is the deep reason. And it is put forward that coal mine should build the integrated management from the coal mine dust prevention facilities management, the unsafe behavior of people management, organization system of management and environmental factors.

针对煤矿井下回采工作面应力主导型煤与瓦斯突出灾害日益严峻的现状,设计了基于矿压监测数据的煤与瓦斯突出实时预警系统,该系统主要包括预警模型、软件系统、硬件系统及配套管理制度4个方面内容,能够实现回采工作面突出危险性的在线分析与实时预警.系统在新景矿取得了较好的现场应用效果.

绘制了表达矿山统计法和分源预测法误差产生要素及相关关系的事故树,结合现场实践应用情况进行综合分析,针对方法选用、参数修正等方面的问题给出了切实可行的应对措施,为提高瓦斯涌出量预测准确率提供参考.

A essence safety culture system of coal mining enterprise was analyzed,the elements of the system and their relationships were expounded with the thinking method of system theory.The coal mine intrinsic safety culture system schematic diagram which consists of personnel,elements,processes was drawn.The construction model of mine intrinsic safety culture system included four parts-target concept subsystem,process control subsystem,developing power subsystem and image transmission subsystem.The construction model was established from the corporate perspective,the spatial perspective and time perspective.At last,it was pointed out that the incentive deviation should be avoided and to focus on building the people-oriented mine essence safety culture system.

Mine risk factors have been identified,and based on the theory of the accident causing to find the coal mine safety system consists of man,machine,environment,and management.Gas,water,fire,dust,coal mine roof five kinds of typical accident fault tree diagram have been given by use of systems analysis from human,machine,environment,and management four elements.Good mine safety management consist of mine safety management and system management,the introduction of safety systems engineering to safety management make it to be a system with holistic,comprehensive and scientific characteristics.

Several representative accident cause theories have been described,and their respective characteristics and conditions of application have been summed up.Combined with specific accident case,the causes have been identified,the practical prevention and control measures have been put forward by using the appropriate theories.

我国煤矿企业员工的职业安全健康管理问题越来越多的受到人们的关注。论文在分析了我国煤矿企业职业安全健康管理中存在的问题的基础上,对如何改进职业安全管理进行了探讨。煤矿企业职业安全健康管理必须执行"安全第一、预防为主、综合治理"的方针,将国家的职业安全健康管理的方针、政策、法律法规和标准落到实处,逐步走上法制化、规范化管理的轨道。