有哪些信誉好的足球投注网站- 1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
- 2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击 这里二次下载。
- 3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
- 4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
- 5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
- 6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
- 7、VIP文档为合作方或网友上传，每下载1次， 网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档
查看更多
Analysis 0f Present Situation and Development 0f Coal Mine
Analysis 0f Present Situation and Development 0f Coal Mine Safety The condition of coal mine in our country is complex. Security ,one of the main factors , has been restricted to the healthy development of the coal industry. Our country has made a series of achievements in Gas control, Ventilation, Water hazards prevention control and Fire prevention control. At the same time, the coal mine safety field still exists many critical technical problems , which need to further research. the safety technology development achievements in Our coal mine Coal and gas outburst prevention and treatment The gas coal-dust explosion prevention and treatment Gas extraction Mine ventilation and coal-dust prevention and control Mine fire prevention and control Coal and gas outburst prevention and treatment In the regional prediction technology, coal and gas outburst regional prediction method and the index has been built based on the geophysical, gas geology and power division method and realizing regional prediction visualization. In the continuous prediction technology, the working and continuous monitoring technology and equipment has been further improved. the continuous prediction technology has been used in actual application. The gas and coal-dust explosion prevention and treatment Set up the mine gas coal-dust explosion risk assessment model, the development of the gas coal-dust explosion danger prediction , prevention and control technology evaluation expert system. Develop a new generation of coal mine integrated monitoring system. The principle of infrared gas detection technology goes well. Develop the miners positioning system and network monitoring system. Gas Extraction Rig which can work for 1000 meters has been introduced from the foreign country. Test and study the gas drilling on the ground technology. Mine dust Mine ventilation and coal-dust prevention and control prevention and control Mine ventilation system reliability evaluation and decision technolo
文档评论（0）